Grebel, Thomas

There is wide agreement among economists that entrepreneurship is a crucial factor in the diffusion of new technologies (Science 2001), international competitiveness (Audretsch et al. 2002), and the creation of new jobs. However, entrepreneurial agents are almost invisible in standard economic theories embedded in the mainstream neoclassical paradigm. A theoretical framework which allows an explicit consideration of this decisive source of the dynamics of capitalist economies is the experimentally organized economy as suggested by Carlsson and Eliasson (2003). Within this essentially non-linear, neo-Schumpeterian, and evolutionary framework, entrepreneurship offers the decisive link between the technological system and the exploitation of business opportunities within the market economy. The framework developed in this paper is closely related to the experimentally organized economy, as it also focuses on the nature of entry and exit of new firms, driven by a high potential of business opportunities offered by a new, emerging technology.

Entrepreneurship has always been a controversial topic in economic theorizing. Most of the research work comes to an end at a purely appreciative level. A consistent theory of entrepreneurship is missing; that is, a theory that is adequate to combine the various strands of literature in order to come eventually to an empirically testable model. Besides the early theories that approach entrepreneurship from a rather intuitive perspective, to be traced back to Schumpeter (1911, 1939) and Kirzner (1973, 1999), a modern evolutionary approach should also contain some specific theories such as the theory of human capital (e.g. Schultz 1975), social networks (e.g. Granovetter 1973), and Neo-Schumpeterian Economics (e.g. Loasby 1999). In this paper we present an approach by designing an analytical model that can be applied to different industries and historical settings.

The core elements of our model are the actors. Even though there are two views on this issue-either models explicitly focus on actors or take a more general approach emphasizing the actors’ environment only-for our purpose we draw on the actor-centred perspective. We do not look at actors from the perspective of a situational determinism and optimized behaviour, but we characterize the individual actors as procedurally rational, struggling in a trial-and-error process for survival and prosperity. Consequently, in their entrepreneurial decision making they do not know the potential economic outcomes, but experiment with different combinations out of a large set of business opportunities enabled by a major technological breakthrough. The actors in our model are heterogeneous in their individual endowment of accumulated competencies and capabilities, available venture capital, and entrepreneurial attitude. We present firm formation as a social phenomenon where individuals within a social network decide to found firms. The formation of social networks is approximated by a random permutation process within our population of actors. An arbitrary number of actors, not yet involved in a firm, are randomly matched in each period. The comprehensive endowment of the group’s actors constitutes their potential to found a firm. Whether a new firm is founded or not depends on the group’s environment. In particular, they take into account the industry’s economic development. As they obviously do not have perfect knowledge about all critical factors which drive an industry’s development, they evaluate the average industry’s performance by a chosen set of economic indicators. These evaluation criteria can be seen as the decision threshold as to whether actors establish a firm.

Only in those cases where the actors’ perceived comprehensive endowment appears to be sufficient to enter a market and the expected economic future signals promising rewards, is a new firm born. The birth process has an influence on the industry level, which in return has a feedback effect on the micro-level and thus the future decision processes of other agents as to whether to found a firm. We thereby manage to model a micro-macro reciprocity. This reciprocity is essential for understanding the endogenous evolution of the foundation threshold (the agents’ shared mental model about economic opportunities), as it changes over time.

The act of founding a firm depends on the individual evaluation of the current (microand macroeconomic) situation. The success of a firm, once founded, is determined by the individuals’ resources and their specific managerial capabilities, which are embedded in the combination and complementarities of their skills. In short: their human capital. In the short run, the survival of the firm decisively depends on a balanced relationship between human capital and venture capital. Missing human capital cannot be substituted by venture capital and eventually might lead to insolvency. As the firm has to invest its funds profitably within a certain period of time, the maladjusted firm will not have sufficient human capital to manage proper investment and eventually will face insolvency. In the long run, however, the economic success of a firm depends on its competitiveness. Competition is represented by a heterogeneous oligopoly, which emphasizes the necessity of vertical completeness in a balanced set of embodied competencies and horizontal variety stressing the qualitative dimension of innovation competition. If the firm has to exit, again, this has a feedback effect on the foundation threshold. Due to the heterogeneous composition of actors and their experimentally organized behaviour, our model is illustrated numerically for the time being.

In our first simulation experiments we are able to show the emergence of new industries and their endogenous evolution from a theoretical stance. Firms do not appear continuously but in swarms, showing a high degree of sensitivity to the coincidence of entrepreneurial behaviour and environmental conditions. Our model is designed in a very general way and the promising results achieved so far support the application of this basic setting to recent empirical observation of developments in new industries. Finally, this should improve our knowledge about conditions favouring/hindering the emergence of successful knowledge-intensive industries such as in the information technology and biotechnology sectors. This will be the agenda for our future research.


Historical sketch of entrepreneurial functions and ideas

The importance of entrepreneurial behaviour for economic development has always been stressed in economic history but the existence of entrepreneurship in orthodox economic theory has almost been uncletectable. Economists wonder why the entrepreneur has almost vanished in economic theory (Barreto 1989). The reason apparently is that with the introduction of entrepreneurial behaviour in orthodox theory a model runs the risk of losing its consistency, and therefore the entrepreneur remained a stranger in economic theory. Classical economists touched on this subject matter more than neoclassical theorists, who by using the equilibrium concept, might never be able to. This strict methodological apparatus appears to rule out the possibility of placing an endogenous equilibrium-disturbing element as the centrepiece of economic development.

The first one to take up thinking about the role of entrepreneurs in the economy was Cantillon (1680s-1734) (Cantillon 1755). He classified economic agents into three groups: (1) landowners, (2) entrepreneurs, and (3) hirelings (see Hebert and Link 1982). Whereas the first and the third group are characterized as being rather passive, the entrepreneurs play the central part in his Essai sur la nature du commerce en general. They play the role of coordinator, connecting producers with consumers, and also the role of the decision maker engaging in markets to earn profits and struggling with uncertainty. His concept of uncertainty was constrained to the entrepreneur though, and it had to wait for Frank Knight (1921) for a detailed distinction between risk and uncertainty as an economy-wide feature affecting all economic agents. Cantillon was also the first to emphasize the entrepreneur’s economic function while distinguishing it from the agents’ social status. A functional perspective was maintained by Cantillon’s successors associated with the French school. Quesnay (1888), the precursor of the Physiocrats, shifted the field of concentration to the significance of capital for economic growth, thereby reducing the role of the entrepreneur-instead of an industry leader-to a pure independent owner of a business, though endowed with individual energy and intelligence (Hebert and Link 1982: 31).

Baudeau (1771) suggested the function of the entrepreneur as an innovator and thus brought invention and innovation into the discussion. Furthermore, he emphasized the capacity to process knowledge and information as that which makes the entrepreneur a lively and active economic agent. Another rather capitalistic view was set up by Jacques Turgot (see Groenewegen 1977). According to him, the entrepreneur is the outcome of a capitalist investment decision: the owner of capital can either simply lend his money and just be a capitalist, or decide to buy land for lease and hence become a landowner, or decide to buy goods to run a business and thus become an entrepreneur. Say (1803, 1828) continued Turgot’s ideas and elevated the entrepreneur to a key figure in economic life. In contrast to Turgot he made a sharp distinction between the entrepreneur and the capitalist. The entrepreneur might give capital to a firm but he does not have to. Consequently, this also allows for a negligence of risk and uncertainty,1 when considering the entrepreneurial element explicitly. Say suggested a twofold approach. He looked at the entrepreneur from an empirical perspective to establish actual entrepreneurial behaviour, which he then tried to reduce in a second step to a general entrepreneurial theory by subtracting all incidental aspects attributable to certain social and institutional circumstances (Hebert and Link 1982). The function of his entrepreneur was to understand technology and to be able to transfer that knowledge into a tradable product that meets the customers’ needs.

Say paved the road for Schumpeter’s theory on entrepreneurship, and Schumpeter’s entrepreneurial concept has to be seen as the pivotal point in this field of research. Most of the economists before Schumpeter-with some exceptions-worked within equilibrium theory and most of the theories on entrepreneurship after Schumpeter are built on his ideas (see Hebert and Link 1982).

Before we proceed to the discussion of Schumpeter’s concept, we briefly have to display the neoclassical treatment of the entrepreneur.

Neoclassical constraints

The question “What about the entrepreneur in orthodox neoclassical theory?” is easy to answer, but it takes quite an effort to set out the argumentation. The answer is: There is no space for an entrepreneur in neoclassical theory. The relevant discussion can be found in Barreto (1989) The Entrepreneur in Microeconomic Theory, where he describes the disappearance of the entrepreneur in economic theory. He shows that with the advent of the modern theory of the firm, economists lost track of the entrepreneur. Basically, the framework of assumptions does not allow for a consistent implementation of entrepreneurial behaviour. The main problem is rooted in the perfect rationality assumption which is a necessary condition for optimal behaviour. This does not allow for a “real” choice and excludes the treatment of true uncertainty subject to entrepreneurial behaviour. This whittles down the role of the entrepreneur to a static, passive, and therefore redundant economic agent within a self-running firm. It is beyond the scope of this paper to recount the anamnesis of the entrepreneur in economic theory. Basically Schumpeter’s legacy can be regarded as the outcome of such reflection.


To tell the story the right way, we cannot start right at Schumpeter’s concept of the entrepreneur. As mentioned above, Schumpeter’s work was tremendously influenced by a critical review of equilibrium theory. Though fascinated by Walras’ system of equilibrium, he stated that equilibrium theory contributed as much as it could; but further insights could not be expected.2 Schumpeter’s circular flow is a less formal representation of Walras’ general equilibrium theory.3 To reach equilibrium, Schumpeter suggests that economic actors’ decisions and actions have to be repeated over and over again in the same way, so that eventually all actors’ plans coincide to end up in equilibrium. Schumpeter characterized this result as a static situation that did not allow for change (Barreto 1989). His aim was to investigate the dynamics behind empirically observable economic change. The explanatory element he called innovations. The economic agent to bring along innovations (i.e. “new combinations”) he called the entrepreneur.

When we look back to the existing literature at that time, Schumpeter’s entrepreneurial concept is a synthesis of, firstly, Say’s and Badeau’s work and, secondly, the critique associated with the Austrian school.4 Schumpeter’s entrepreneur was and still is the most renowned concept. Therefore, we also take it as the intellectual foundation for our model. Another economist to be mentioned in this context is Israel Kirzner.

Kirzner and the Austrian school

There is a long-standing debate, partly stirred up by Kirzner himself, about what the significant difference is between Schumpeter’s and Kirzner’s entrepreneur. Both Schumpeter and Kirzner took up the Austrian critique of general equilibrium theory. Whereas Schumpeter developed a-to our minds-more general approach to entrepreneurship based on economic change, Kirzner focused on the market process. For the reader’s convenience, the intuition of the Austrian school is recalled briefly. Equilibrium theory neglects market processes. If all plans of economic actors match, then there is no need for markets. In a state of disequilibrium, however, actors’ plans do not match. They have to be revised and adapted to the new market situation.5 Economic agents have to change their minds continuously and this generates a dynamic process which Kirzner calls the market process (Kirzner 1973: 10). This suggests that a Robbins-type of maximization calculation6 is impossible, von Mises (1959) solved this task by introducing human action (see Barreto 1989: 17). Besides the agents’ attempt to calculate economic problems, they are also alert to opportunities. Once an economic agent recognizes a market opportunity, he acts on it to improve his position. Opportunities are abundant in a situation of disequilibrium. That is where Kirzner’s entrepreneur comes from. While von Mises admitted the ability of human action to every economic agent, Kirzner confined it to a certain group of agents which he labelled entrepreneurs. Hence, the entrepreneur as an arbitrageur that equilibrates markets was born (Barreto 1989: 21).

The Schumpeter-Kirzner entrepreneur discussion

Kirzner (1999) distinguished the Schumpeterian entreprenevir, as the innovator and the creative destroyer of equilibrium, from his own, the equilibrating entrepreneur alert to market opportunities. We leave it to the reader’s taste to make this distinction between an equilibrium-disturbing and an equilibrium-creating entrepreneur. As a matter of perspective, if we allow alertness to market opportunities and the agent’s implied human action to be part of innovativeness, neglecting the question of whether a state of equilibrium in a dynamic economic world will ever be reached before another dynamic entrepreneur comes to prevent economy from equilibrium, it would leave us with the centrepiece of the Schumpeterian dynamics of economic change, i.e. the entrepreneur.7 In short, Schumpeter’s stream of thought is as follows: no entrepreneur-no innovation-no dynamics-no evolution.

“Giving up the Holy Grail”

Ever since economists started to theorize on human behaviour, they have been looking for consistency in theory. What classical theorists could not achieve, neoclassical economists succeeded in. The marginal school and in particular the Walrasian general equilibrium theory eliminated the shortcomings in terms of inconsistency within economic theory. They managed to refine the patchwork of classical thoughts to a consistent unity, but-as we see from the discussion above-at the cost of the entrepreneur. Yet, if we give up on the equilibrium concept, for the sake of the entrepreneur, we might run the risk of losing consistency in return. Then, we have to do disequilibrium economics without such a powerful mathematical apparatus as that of the neoclassical school. Equilibrium needs optimal behaviour. Optimal behaviour needs perfect rationality. Perfect rationality requires perfect foresight and information. Regardless which of these assumptions we relax, at the same time we question the validity of the remaining ones, and, even worse, we question the methodological approach. This all foreshadows another era of patchwork in (evolutionary) economic theory, concerning the investigation of entrepreneurship, until an appropriate methodology is found. These misgivings can be confirmed when we look at the existing literature which refers to entrepreneurship and at the same time abandons the equilibrium concept.8


[. . .] the word “evolutionary” is extremely vague. It is now widely used, even by economists using neoclassical techniques. “Evolutionary game theory” is highly fashionable. Even Walras is described as an evolutionary economist fjolink 1996]. [. . .] In precise terms it signifies little or nothing. (Hodgson 2000)

As Hodgson’s comment shows, there is an ambiguity about the meaning of the word “evolutionary”. For this reason, we decided to discuss briefly what evolutionary means to our minds. The model presented in this paper is meant to be a general approach to entrepreneurship delivering constructive propositions for a basic evolutionary setting.

Consolidating the critique of Schumpeter, the body of thought from the Austrian school, and accordingly Kirzner’s adaptations to the entrepreneurial case, research on entrepreneurship becomes the pivotal issue for a micro-based evolutionary theory. A lot of factors are addressed that boil down to questioning the phenomenon of innovation in an economic system. Innovation means novelty and in accordance with Arrow’s epistemological reservation, an assumptional house of cards built on perfect foresight (complete information), meaning perfect rationality, is a contradiction in itself. It ignores economic change spurred by the dynamic entrepreneur. Each of the assumptions mentioned above entails a huge discussion leading to various strands of literature. Of course, it is not the aim of this paper to cover all of these strands, but they have to be taken into account, implicitly.9

Along these lines, in our model we begin at the micro-level. The agents are heterogeneous and differ in their individual endowment. Information is incomplete, in particular with respect to future economic development. Because of imperfect foresight, agents have to deal with true uncertainty.10 Furthermore, these boundedly rational11 agents are limited in their cognitive capabilities to perceive and process the accumulated information. Owing to the high degree of novelty attached to entrepreneurial behaviour, true uncertainty does not allow for a calculation of expected values. The agent neither knows the set of possible outcomes nor the corresponding probabilities. As we thus deprive the agents from optimizing capabilities, they have to make decisions using the best of their knowledge. They have to perform, in the words of Mises, human action. The agents therefore have to form expectations in various respects: they have to evaluate their individual endowment of resources, capabilities, and competencies and the overall economic situation, and also consider the possibilities for acquiring missing complementarities (to be specified later on).

The light of perfect rationality missing, agents consequently make individual forecasts motivated by their personality12 and current (economic) environmental factors. Decisions are thus the outcome of a path-dependent process: the evolution of the agent’s individual (accumulated) endowment (resources, capabilities, and competencies including experience) and non-individual, environmental factors subsuming the economic situation. The latter gives us the notion of feedback effects. The economic agents’ decisions are influenced by economic factors (economic situation) and in return influence economic factors by their actions, e.g. by the decision to establish a firm. It goes without saying that we implicitly consider irreversibility to round off the assumptional frame of our evolutionary perspective.

In the following, we flesh it out with some less abstract ideas of entrepreneurial behaviour. Since our main intention is to show the basic structure of an evolutionary model of entrepreneurship, we decided to tolerate some simplifications to be discussed in the following section.


We divide an agent’s individual endowment into three components which we call entrepreneurial spirit, human capital, and venture capital. These three factors form the individual agent.13

Entrepreneurial component. The entrepreneurial component can be thought of as the residual of the agent’s individual endowment which is hard to measure empirically. It comprises the intangible characteristics of the heroic Schumpeterian entrepreneur. By doing this, we follow empirical evidence that does not allow detecting a Stereotypic entrepreneur and furthermore, we take up on Mises saying that every human being has the potential for human action.

Human capital. With the second component we refer to one of the more successful strands of research. The human capital approach, constituted by Theodor W. Schultz (1971), and elaborated by Gary S. Becker (1993) among others, allows for an empirical application. It tries to explain optimal investment in human capital and delivers insights on income distribution. The theoretical concept is basically derived from investment theory in physical capital using marginal analysis. We do not use the human capital concept this way,14 but we emphasize the importance of human capital for establishing a firm. Agents do not know the actual return when they decide in favour of founding a firm, although they might know their remuneration when offering their human capital to the labour market. Therefore, agents decide in a dichotomous way; if they expect the returns of going entrepreneurial will be higher than being an employee, they will decide to become an entrepreneur.

Moreover, we refer to the literature on knowledge originating from the Austrian school. Hayek (1937) discusses the importance of knowledge in a disequilibrium situation, i.e. a situation of uncertainty. Loasby (1999) provides a good overview in Knowledge, Institutions and Evolution in Economics. For our purpose, we interpret the agents’ role of human capital as the crucial productive element for the long-run survival of the firm, once it is founded by the agents. It is needless to say that human capital encompasses both technological as well as economic competencies of agents.

Venture capital. The third element we include into the agents’ endowment vector is a component of venture capital. In so doing, we pay attention to the discussion of whether the roles of capitalist and entrepreneur can be separated. The “early French view” saw the entrepreneur as a risk bearer while the “English view” identified the entrepreneur as the capitalist. Schumpeter (1939) discusses the role which money plays in entrepreneurship as well. The bottom line is that potential entrepreneurs need to have capital to start their business, regardless whether they own it themselves or borrow it from others. Empirical evidence supports the hypothesis that entrepreneurs in general face financial and liquidity constraints (Blanchflower and Oswald 1998).

From this discussion we draw out the assumption that each agent is endowed with a certain amount of capital which he can spend on a business venture. Again, we do not bother about the details, whether he inherited or accumulated a certain amount of money by saving.

So far, we have characterized the individual agents by their endowment factors.15 Each actor possesses the potential to be an entrepreneur as von Mises suggests from a theoretic perspective and as empirical data shows (Blanchflower and Oswald 1998). Thereby, the decision (human action) is not necessarily a behaviour of optimality, calculating what the maximal return to total human and (free disposable) venture capital is. However, the long-run survival of a firm once founded is highly dependent on the agent’s human capital. As we vested all agents with the option to own venture capital, we can incorporate the notion of risk bearing and uncertainty. But as we will see later on, the “mainly”16 entrepreneurial agent need not be the risk bearer.17

By defining agents in that manner, it allows to consider not only the agents’ isolated decisions but also the application of a broader system perspective. As Carlsson and Eliasson (2003) point out, a technological system is characterized by various components, which have a collective meaning: the set of technological possibilities, which can be interpreted as a combinatorial design space (Stankiewicz 2001) formed by a cluster of mutually complementary technological capabilities. The organizational and institutional dimension basically denotes the interaction between heterogeneous agents and the respective combinations and cross-fertilizations. The economic dimension stands for the selection processes of markets. In order to take into account such a systemic view, we introduce social network theory.

Social networks

To acquire the overall endowment actors regard as necessary, they can choose several ways to acquire the missing endowment factors. They have to figure out how to get access to required resources (Penrose 1959) and whether the necessary competence to combine these resources is available (Foss 1993). To draw on Coase (1988), some of the resources and competencies can be inherent to the agent, others have to be acquired on the market or otherwise. We will not go further down this road and leave that task to the modern evolutionary theory of the firm still to be developed,18 since we do not argue on the firm level but, following Birley (1985), investigate the “pre-organization” phase in order to stress the importance of an agent’s social network as a main source of help to obtain resources and competencies to start a business.

Furthermore, we discuss the role of social networks (Granovetter 1983) for two reasons. First, for methodological reasons: by introducing social networks into the model, we climb up one step further upon the aggregation ladder and thus leave the micro-level (individual’s level) to bring the collective dimension (the agent’s social context) into discussion. Second, for empirical reasons: personality-based theories-that is, purely micro-based theories-try to find personal traits unique to entrepreneurs.19 These attempts have not yet been successful in identifying the entrepreneur when not considering the social group context (Hall 1982).

It is beyond the scope of this paper and not our intention to discuss social network theory comprehensively. We put together existing fragmental theories on entrepreneurship in an evolutionary model setting. Within this project social networks are incorporated as one of various critical elements in entrepreneurial behaviour.20


In the following section we introduce the basic structure of our model of entrepreneurship evolution. The model is designed in a very general form so that it will eventually allow us to investigate different scenarios, and also to implement the relationships and specificities of certain sectors. In a way the basic design has to be seen as a platform approach allowing several extensions with regard to the theoretical perspective as well as with regard to a closer look at the empirical sphere.21

The actors

Survival and exit

Whether a firm f^sup t^^sub j^ survives in the market or is threatened by exit depends on its set of endowments and composition of aggregated capabilities. They determine a firm’s competitiveness. The ratio between human capital and venture capital determines the fixed cost. The variable unit costs decline over time owing to a learning-curve effect while accumulating output. In combination with the firm’s individual demand curve (equation (10)) the firm’s profitability (fitness) relative to other firms is determined. Hence the hazard of exit if facing insolvency is stated.

So, we obtain data on sales and exits necessary to model the founding threshold.24

Basic structure of the model

Figure 1 summarizes the basic structure of the model. To start with, we distinguish several levels of analysis: the actors’ level, the firm level, and the sector level. The entrepreneurial process primarily takes place on the actors’ level. A set of actors with heterogeneous endowments is given. Actors form social networks that change over time, expressed by a random matching process.

The actors, grovipecl together, constitute a potential firm. Since they neither have perfect foresight nor complete information about future prospects, their decision will be myopic, based on their common evaluation of the economic situation which is influenced by their subjective perception of measurable economic indicators. The more economic indicators paint a promising picture of a possibly prosperous outcome of entrepreneurial actions, the lower the threshold for actors to decide in favour of such action. The same holds in reverse. If actors decide against founding a firm, they return to the set of actors available for another trial to evaluate entrepreneurial actions within a changed social environment. If they decide to found a firm, the firm is established and actors’ resources are bounded within the firm so that they are excluded from a further firm founding process. On the sector level, the firm is forced to compete with incumbent firms. Their competitiveness is determined by their comprehensive set of endowments constituted by the founding actors’ individual endowments. The selection process, which is competition, has an effect on each firm either worsening or improving its fitness to stand future competition. The short-run exit criterion, competing “for the market”, is insolvency. Firms with an unbalanced set of endowments run out of money (venture capital) and finally have to exit the market. The long-run selection process via market competition, or to put it in other words competition “in the market”, decides over the competitiveness of the actual business idea.


In this section we present some simulation results of the model. Though our focus is on entrepreneurial behaviour, we have to take a rather holistic view. Combining the manifold theoretical contributions in the realm of the analysis of entrepreneurial behaviour, we also have to touch some peripherals of the subject investigated in order to show the endogenous dynamics of entrepreneurship. Otherwise, it would not be possible to include the feedback effects suggested in the model. Nevertheless, we neglect further specification of those peripheral, economic phenomena and leave it with a purely theoretical case. The simulations we ran all show the same qualitative features.

Figure 2 summarizes the simulation results. To start with, a stereotypical development of the emerging sectors’ total sales is shown in Figure 2(a). Once firms are founded, the industry’s total sales increase sharply. The high growth rates at the beginning function as a signal for other economic actors to enter the market (to innovate), too. From a certain point in time, as competitive pressure increases, as more firms enter the market and as the market diffusion of products based on the new technology proceeds, growth rates decline though remaining positive. Thus, the total sales curve takes a stylized sigmoid shape. Firms do not enter all at once. Some enter early whereas others enter at a later point in time. Early entrants might have a first-mover advantage whereas late entrants might have to struggle for survival competing with larger firms. It is not just the time of entry that makes firms different, but also their set of endowments, which is crucial for their overall economic performance.

We consider actors’ cognition to be the guiding element of entrepreneurial behaviour as illustrated in Figure 2(d). Actors have to evaluate their chances to found a potentially successful firm. Due to their bounded rationality, they have to decide on grounds of their accumulated knowledge and experiences whether to found a firm dor not. They make a subjective decision as influenced by their perception of market opportunities, represented by the individuals’ interpretation of the economic indicators. The higher a sector’s growth rates are, the better market opportunities are evaluated, hence, the actors’ inhibitions for entrepreneurial behaviour decrease and more and more firms are founded. This is the story the decreasing foundation threshold tells us until compensating effects set in: with an increasing number of firms in the market, the competitive threat is increased. Furthermore, growth rates shrink and some firms already have to exit the market. As economic indicators get worse, the foundation threshold starts rising.

Correspondingly, we observe a swarm of entrepreneurs (Figure 2(b)) along the plummeting foundation threshold until first exits occur. Then, the number of firm entries decreases. The foundation threshold starts rising again. Fewer actors positively evaluate market opportunities and therefore fewer actors found a firm. Eventually, exits exceed entries (Figure 2(c)) and we observe a fierce shakeout (e.g. Klepper 2002). After a phase of consolidation, the founding threshold decreases again when overall returns on sales become positive. As time goes by, the innovation potential of the technology declines and the founding threshold rises, i.e. the actors’ common evaluation of such technology becomes increasingly negative (cf. Grebel 2004). Note that the long-run evolution of the sector is not considered explicitly. In order to do this, we would have to change the selection process of firms and try to model the demand side more precisely.


The formulation of the model and the first simulation results confirmed our intuition and the functioning of the model. In a next step an empirical validation has to be undertaken to round off the analysis. It has already been stated that the model is to serve as a platform to be calibrated and possibly reformulated to achieve robustness of the model’s implied hypotheses. The construction process of the model itself was inspired by various empirical works such as Szyperski and Nathusius (1977), Klandt (1984), and Bruderl et al. (1996). The endowment set of actors summarizes all possible characteristics of the individuals which might have an influence on entrepreneurial behaviour. The role of social networks in a pre-entrepreneurial phase has been discussed by Birley (1985). Klandt and Krafft (2001) investigated the foundation of Internet/e-commerce firms in Germany, surveying 8,989 newly founded firms via an online questionnaire (see They state that on average 1.9 (in firms not financed by venture capital, Business Angels, or strategic investors) to 3.1 (in firms financed by venture capital, Business Angels or, strategic investors) individuals take part in a foundation.

The analysis of 1,890 start-up firms delivered the results depicted in Figure 3. In each sector a wave of firm foundations shows up. The first wave was in the technology sector followed by Internet services and then e-commerce. Figure 4 shows insolvencies of Internet/e-commerce firms per month, where we can see a surging nvimber of exits following the swarms of foundations. Venture capital has a significant influence on the firms’ growth. In 1999, start-up firms financed by venture capital generated sales of 2.6 million DM on average, whereas start-up firms without venture capital generated only 1.4 million DM (cf. Klandt and Krafft 2000). Besides, the propensity to insolvency is higher among venture-capital-financed firms (Figure 5). Though we have not included a differentiation between venture-capital-financed and not venture-capital-financed firms yet,25 the data suggests that the relation between a high amount of venture capital and the propensity to insolvency can be corroborated. Concerning the actors’ attitude towards innovative technologies such as the Internet, we cannot yet offer an empirical validation of the so-called founding threshold, which represents the dynamic change of the actors’ evaluation of market opportunities, contingent on the underlying feedback processes we assumed in our model. This will be left for future research.


We developed a model of entrepreneurial behaviour which we claim to be an evolutionary one. Once again, we emphasize that we explicitly consider entrepreneurial behaviour, i.e. the birth process of firms and industries. Though possible, a further discussion of the industry life cycle was not intended. The core elements of the model are the heterogeneity of actors, their boundedly rational behaviour to make myopic decisions in favour of founding a firm (which might eventually lead to suboptimal outcomes), the feedback effects from the micro- to the macro-level and vice versa, the (irreversible) historicity of events and the variation and selection mechanisms that put the economic process into a dynamic context.

Not using an equilibrium concept nor assuming optimal behaviour, we managed to avoid a “survivor bias” at least from a theoretical point of view: some actors decide to run a firm even though they have to exit in the short run because of a lack in the necessary and adequate comprehensive endowment.

Economic change is brought along, firstly, by the actual economic development driven by the market process and, secondly, by the changing attitude of actors driven by their perception of the economic situation.

At the beginning of the up-coming new sector, actors have to deal with true uncertainty prevailing in the decision-making process. Actors have to rely more on their subjective and possibly “false” intuition concerning their entrepreneurial actions, which leads to market turbulence in the early phase of the sector life cycle. As time goes by actors are better able to understand new technologies, to assess market opportunities and their chances for successful innovative, and entrepreneurial behaviour. Consequently, uncertainty decreases, more precise predictions and more careful decisions will be made, and thus stabilizing forces set in.

Our future research work is motivated by empirical applications. Therefore, some specifications will be necessary. Starting at the actors’ level, we have to investigate the actors’ individual set of endowments in order to identify the actual essential components that spur entrepreneurial behaviour, including the creative process of generating a business idea. A possible classification of actors and the formation process of their social networks that have an impact on entrepreneurial behaviour will have to be considered. In this context, we will have to introduce an interaction-based component into our model to illustrate the qualities of the actors’ search process.

The most challenging part of our future research work will be to analyse the cognitive part of the story, which is the role of the founding threshold. It is to investigate the way economic actors perceive the economic situation and how a universal mental construct comes into existence leading to a bandwagon effect in entrepreneurial actions showing swarms of innovations.

1 Delimiting Say’s concept from Cantillon’s.

2 Surely, Walras was not the only one who influenced Schumpeter’s thinking. There are many others that delivered preparatory work such as Marx, Weber, Menger, Wieser, Say, Hayek, Bohm-Bawerk to name a few. But as the equilibrium concept being the bone of context we quote Walras in this context. See Hebert and Link (1982) for a quick overview.

3 Although Schumpeter was fascinated by Walnis’ concept of equilibrium, the bifurcation point of their intellectual paths originated in the different treatment of the subject. Walras thought it to be permissible to abstract beyond the adjustment processes in an economic system starting right at the end, which is the equilibrium. Schumpeter concentrated more on the process that destroys equilibrium and, if at all, might lead to equilibrium.

4 Ludwig von Mises and Friedrich von Hayek as the alleged leaders of the Austrian school engaged In the analysis of disequilibrium conditions focusing on market processes. To get a good intuition of Hayek’s attitude towards mainstream economics, see Hayek (1937). Concerning Ludwig von Mises, some necessary amendments will be given when introducing Kirzner’s entrepreneur later on in this paper.

5 This is the point to stress the role of information and knowledge as Hayek, Mises, and Kirzner do.

6 Robbins puts forward the economic agents’ task to economize scarce resources efficiently. But efficiency is no more possible in an Austrian-school-like market process (Robhins 1962).

7 As we do neither use an equilibrium concept in our entrepreneurship model, nor think that entrepreneurial behaviour can be investigated within an equilibrium concept, we will not take up this discussion.

8 Note: on the one hand, the entrepreneur cannot be a homo oeconomicus which is a necessary condition to use equilibrium analysis. But on the other hand, the homo oeconomicus is the only agent that performs optimally and therefore deterministic. Hence, the question to answer is, how a less perfect agent such as the entrepreneur can be modelled, not getting lost in indeterministic arbitrariness?

9 For a succinct setting of an evolutionary theory see for example Nelson (1995).

10 As the reference work on uncertainty see Knight (1921) and his distinction between risk and uncertainty. In the entrepreneurial context we have to deal with “true” uncertainty. The agent does neither know the outcome nor is he able to calculate corresponding probabilities.

11 To this discussion see, e.g. Simon and Egidi (1992).

12 By personality we mean the conglomerate of accumulated knowledge, information, and experience.

13 Each component is the result of a cumulative evolutionary process which will not be discussed in this paper. With respect to an empirical application, each component requires sector-specific observations.

14 We are conscious of our tightrope walk to use a strictly neoclassical concept within our model that we explicitly claim to be evolutionary. We assume a link between the agents’ set of capabilities and their economic performance. For the time being, we rather use it as a metaphor to stress the importance of knowledge in our model leaving the necessary “evolutionary” clarification of this concept for further research.

15 Besides the suggested endowment factors any other desired factor can be included into the endowment set.

16 As we proceed we will not confine the entrepreneurial behaviour to a single agent but to a number of agents.

17 This goes along the lines of Schumpeter (1939: Chap. “Entrepreneur”).

18 We could include learning into the model and thus reflect on the human capital component. Penrose (1959), Demsetz (1973), Wernerfelt (1984), and Coase (1988) will definitely give enough inspiration to extend our model.

19 See Aldrich and Wiedcmnayer (1993) as an example.

20 In case agents do not have a sufficient set of endowments and, hence, need additional resources, complementary assets and competencies, networking plays an important and a manifold role (Pyka 2002). Not only docs the social network provide the opportunity to have access to additional and complementary endowment factors, networks have a crucial influence on the actual entrepreneurial decision to start a venture itself. Suppose a single agent thinks himself to be unable to start a business all by himself, he has to convince others in order to be supported. Otherwise, the lack of legitimacy may prevent entrepreneurial actions. On the other hand, a high degree of innovativeness, the so-called liability of newness, might be ended by an agent’s objecting social network, a synergetic outcome of either strong or weak ties within a network can be an enhanced and by the group subjectively high-valued business idea. In other words: a social network functions as a catalyst to spark or prevent a venture. In detail the social networking process can be found in Grebel (2004).

21 Interested readers may request the details from the authors.

22 For brevity this aspect is not outlaid any further here. For a detailed description of the knowledge diffusion process and how it is implemented into this model see Grebel (2004) or email the author.

23 product price of firm j at time t; price limit of firm j at time i; price elasticity of demand; output of firm j at time t; oligopolistic interdependence of firm j at time t; number of firms at time t. For more details see Grebel (2004).

24 This module is discussed in detail in Grebel (2004). The interested reader may also just contact the author.

25 All actors in our model have a certain amount of “venture capital”, i.e. free disposable money capital. So there is no such differentiation between venture-capital-financed vs. not venture-capital-financed firms. Nevertheless, once we incorporate different populations in our actors’ base, including a population of venture capitalists and, furthermore, work on a proper representation of a search process that brings the appropriate actors together, the model will deliver corresponding results.


Aldrich, H.E. and Wiedenmayer, G. 1993: From traits to rates: an ecological perspective and organizational foundings, in R.H. Brockhaus and J. Katz (eds.), Advances in Entrepreneurship, Firm Emergence, and Growth, pp. 145-195. Greenwich: JAI Press.

Audretsch, D., Verheul, R.A. and Wennekers, I. 2002: Entrepreneurship: Determinants and Policy in a European-U.S. Comparison. Boston: Kluwer Academic.

Barreto, H. 1989: The Entrepreneur in Microeconomic Theory. London and New York: Routledge.

Baudeau, N. 1771: Premiere introduction a la philosophie economique. Paris: Didot, Delalain, Lacombe (reprinted by Geuthner, Paris, 1910).

Becker, G.S. 1993: Human Capital, A Theoretical and Empirical Analysis with Special Reference to Education. Chicago: The University of Chicago Press.

Birley, S. 1985: The role of networks in the entrepreneurial process, Journal of Business Venturing, (1): 107-117.

Blanchflower, D.G. and Oswald, A. 1998: What makes an entrepreneur?, Journal of Labor Economics, 16(1): 26-60.

Bruderl, J., Preisendorfer, P. and Ziegler, R. 1996: Der Erfolg neugegrundeter Betriebe-eine empirische Studie zu den Chancen und Risiken von Unternehmensgrundungen [An Empirical Study of the Success Prospects of Newly Founded Firms]. Berlin: Duncker & Humblot.

Cantillon, R. 1755: Essai sur la nature du commerce en general. London (reprinted for Harvard University Press, Boston, G.H. Ellis, 1892).

Carlsson, B. and Eliasson, G. 2003: Industrial dynamics and endogenous growth, Industry and Innovation, this issue.

Coase, R. 1988: The Firm, the Market, and the Law. Chicago: University of Chicago Press.

Demsetz, H. 1973: The theory of the firm revisited, Journal of Law and Economic Organization, (4): 151-162.

Foss, N.J. 1993: Theories of the firm: contractual and competence perspectives, Journal of Evolutionary Economics, (3): 127-144.

Granovetter, M.S. 1973: The strength of weak ties, American Journal of Sociology, (78): 1360-1380.

Granovetter, M.S. 1983: The strength of weak ties, a network theory revisited, in R. Collins (ed.), Sociological Theory, pp. 201-233. San Francisco: Jossey-Bass.

Grebel, T. 2004: Entrepreneurship. Cheltenham: Routledge (forthcoming).

Groenewegen, P.D. 1977: The Economics of A.R.J. Turgot. The Hague: Martinus Nijhoff.

Hall, R. 1982: Organizations: Structure and Process, 3rd edn. Englewood Cliffs, NJ: Prentice-Hall.

Hayek, F.A. 1937: Economics and knowledge, in M. Casson (ed.), Entrepreneurship. Cheltenham: Edward Elgar (Presidential address delivered before the London Economic Club, 10 November 1936; reprinted from Economica IV (new ser., 1937): 33-54).

Hebert, R.F. and Link, A.N. 1982: The Entrepreneur: Mainstream Views and Radical Critiques, 2nd edn. New York: Praeger.

Hodgson, G.M. 2000: What is the essence of institutional economics?, Journal of Economic Issues, 34(2): 317-330.

Jolink, A. 1996: The Evolutionist Economics of Leon Walras. London and New York: Routledge.

Kirzner, I.M. 1973: Competition and Entrepreneur ship. Chicago: University of Chicago Press.

Kirzner, I.M. 1999: Creativity and/or alertness: a reconsideration of the Schumpeterian entrepreneur, Review of Austrian Economics, Vol. 11, pp. 5-17. Dordrecht: Kluwer Academic.

Klandt, H. 1984: Aktivitat und Erfolg des Unternehmensgrunders: Eine empirische Analyse unter Ein-beziehung des mikrosozialen Umfeldes [Activities and Success of Entrepreneurs: An Empirical Analysis taking into Account the Micro-social Environment]. Bergisch Gladbach.

Klandt, H. and Krafft, L. 2000: Die Bedeutung von Venture Capital fur die Entwicklung von Internet-/E-Commerce-Grundungen in Deutschland [The role of venture capital for the development of German Internet/e-commerce start-ups]. Diskussionspapier, Stiftungslehrstuhl fur Grundungsmanagement und Entrepreneurship, European Business School.

Klandt, H. and Krafft, L. 2001: Aktuelle Beschaftigung und Mitarbeiterbedarf bei Internet/E-Commerce-Grundungen in Deutschland [Current employment and labor demand of German Internet/e-commerce start-ups]. Diskussionspapier, Stiftungslehrstuhl fur Grundungsmanagement und Entrepreneurship, European Business School.

Klepper, S. 2002: Firm survival and the evolution of oligopoly, RAND Journal of Economics, 33(1): 37-61.

Knight, EH. 1921: Risk, Uncertainty and Profit. New York: Houghton Mifflin.

Loasby, B.J. 1999: Knowledge, Institutions and Evolution in Economics. New York: Routledge.

Meyer, B., Vogt, C. and Vookamp, R. 1996: Schumpeterian competition in heterogeneous oligopoles, Journal of Evolutionary Economics, 6(4): 411-423.

Nelson, R.R. 1995: Recent evolutionary theorizing about economic change, Journal of Economic Literature, 33: 48-90.

Penrose, E.T. 1959: The Theory of the Growth of the Firm. Oxford: Oxford University Press.

Pyka, A. 1999: Der kollektive Innovationsprozeo. Eine theoretische Analyse informeller Netzwerke und absorptiver Fahigkeiten [The Collaborative Innovation Process: A Theoretical Analysis of Informal Networks and Absorptive Capacities]. Berlin: Duncker & Humblot.

Pyka, A. 2002: Innovation networks in economics: from the incentive-based to the knowledge-based approaches, European Journal of Innovation Management, 5(3): 152-163.

Quesnay, F. 1888: Oeuvres economiques et philosophiques. Aalen: Scientia-Verlag (reprint Frankfurt, 1965).

Robbins, L. 1962: An Essay and the Nature and Significance of Economic Science, 2nd edn. London: Macmillan.

Say, J.B. 1803: A Treatise on Political Economy, 4th edn. Paris: Deterville (reprinted by Lippincott, Grambo & Co., Philadelphia, 1855).

Say, J.B. 1828: Cours complet d’economie politique pratique, Vol. 6. Paris: Guillaumin (reprint 1840).

Schultz, T.W 1971: Investment in Human Capital. New York: Free Press.

Schultz, T. W. 1975: The value of the ability to deal with disequilibria, Journal of Economic Literature, 13: 827-846.

Schumpeter, J.A. 1911: The Theory of Economic Development: An Inquiry into Profits, Capital, Credit, Interest and the Business Cycle. Cambridge, MA: Harvard University Press (translated by Redvers Opie in 1934).

Schumpeter, J.A. 1939: Business Cycles. New York: McGraw-Hill.

Science, O. 2001: Technology and Industry Outlook: Drivers of Growth: Information Technology, Innovation. Paris: OECD.

Simon, H.A. and Egidi, M. 1992: Economics, Bounded Rationality and the Cognitive Revolution. Aldershot: Elgar.

Stankiewicz, R. 2001: The cognitive dynamics of biotechnology and the evolution of its technological systems, in B. Carlsson (ed.), New Technological Systems in the Bio Industries, An International Study. Boston/Dordrecht/London: Kluwer Academic.

Szyperski, N. and Nathusius, K. 1977: Grundungsmotive und Grundungsvorbehalte-Ergebnisse einer empirischen Studie uber potentielle und tatsachliche Unternehmensgrunder [Motives and provisos of entrepreneurial behavior-empirical results about potential and actual entrepreneurs], Die Betriebswirtschaft, 37 (Jena): 299-309.

von Mises, L. 1959: Human Action. London: William Hodge.

Wernerfelt, B. 1984: A resource-based view of the firm, Journal of Strategic Management, (5): 171-180.

Copyright Journal of Industry Studies Dec 2003

Provided by ProQuest Information and Learning Company. All rights Reserved