Public policy spanning a broad range of contexts, ranging from the European Union, to states, cities, and local communities around the globe has turned to entrepreneurship to provide the engine for economic growth, competitiveness in globally linked markets, and jobs. This book explains why entrepreneurship has emerged as a bona fide instrument of growth policy. The knowledge spillover theory of entrepreneurship suggests that entrepreneurship provides a crucial mechanism in the process of economic growth by serving as a conduit for knowledge spillovers. Investments in new knowledge and ideas may not automatically spill over and result in commercialization, as has typically been assumed in models of economic growth. Rather, the existence of what is introduced as the knowledge filter impedes the spillover and commercialization of investments in new ideas and knowledge. By penetrating the knowledge filter and facilitating the spillover of knowledge that might otherwise not be commercialized, entrepreneurship provides the missing link to economic growth. This new focus of entrepreneurship as a conduit transmitting the spillover of knowledge generates a series of theoretical propositions, involving not just the impact of entrepreneurship on economic performance and growth, but also the very nature of entrepreneurship. The book concludes that the new millennium may not be so much about the process of Joseph Schumpeter's creative destruction, where entrepreneurial startups displace and ultimately drive incumbent company's out of business, but rather characterized by creative construction.

According to the knowledge spillover theory of entrepreneurship, people start a new firm because they are not able to commercialize their ideas and knowledge within the context of an incumbent firm or organization. Entrepreneurship therefore serves as a conduit for the spillover of knowledge from the firm or organization where that knowledge was created to its commercialization in the organizational context of a new firm. Because it facilitates the spillover and commercialization of knowledge that might otherwise have remained dormant and uncommercialized within the incumbent firm generating that knowledge in the first place, entrepreneurship has a positive impact on economic growth.

This paper examines the impact of locational choice as a firm strategy to access knowledge spillovers from universities. Based on a large data set of young high-technology start-ups publicly listed in Germany, this study tests the propositions that geographic proximity to the university is shaped by different spillover mechanisms-research and human capital-and by different types of knowledge spillover-natural sciences and social sciences. The results suggest that spillover mechanisms as well as spillover types are heterogeneous. In particular, the evidence suggests that new knowledge and technological-based firms have a high propensity to locate close to universities, presumably in order to access knowledge spillovers. However, the exact role that geographic proximity plays is shaped by the two factors examined in this paper-the particular knowledge context, and the specific type of spillover mechanism.

Contemporary theories of entrepreneurship generally focus on the decision-making context of the individual. The recognition of opportunities and the decision to commercialize them is the focal concern. While the prevalent view in the entrepreneurship literature is that opportunities are exogenous, the most prevalent theory of innovation in the economics literature suggests that opportunities are endogenous. This paper bridges the gap between the entrepreneurship and economic literature on opportunity by developing a knowledge spillover theory of entrepreneurship. The basic argument is that knowledge created endogenously via R&D results in knowledge spillovers. Such spillovers give rise to opportunities to be identified and exploited by entrepreneurs. Our results show that there is a strong relationship between knowledge spillovers and new venture creation. JEL: O3 R1 J24 M13

Despite the overwhelming use of the metaphor ‘ecosystem’ in academia, industry, policy, and management, exact definitions of what ‘ecosystems’ really comprise are scarce and often inconsistent. Existing vague descriptions in the literature do not consider the boundaries of respective agglomerations, hence, they impede the evaluation of performance and outcome measures of respective ecosystems. This special issue is a first attempt to trace the ‘ecosystem’ discussion back to its roots—the ancient oikos, coined by the Greek philosopher Hesiod (700 BC), and aims to critically reflect on the usage of the term ‘ecosystem’, briefly summarize the extant literature and grasp the main features of entrepreneurial ecosystems, namely the economic, technological, and societal dimensions of entrepreneurial ecosystems. We intend to focus on the key elements that characterize an ecosystem, and hence, untangle under what conditions entrepreneurial firms shape and influence economic, technological, and societal thinking within their ecosystem.