Do contributions to online content platforms induce a feedback loop of ever more user-generated content or will they discourage future contributions? To assess this, we use a randomized field experiment which added content to some pages in Wikipedia while leaving similar pages unchanged. We find...

Endogeneity in network formation hinders the identification of the role social networks play in generating spillovers, peer effects and other externalities. This paper tackles this problem and investigates how the link network between articles on the German Wikipedia influences the attention and...

I quantify spillovers of attention in a network of content pages, which is challenging, because such networks form endogenously. I exploit exogenous variation in the article network of German Wikipedia to circumvent this problem. Wikipedia prominently advertises one featured article on its main...

We explore if the Knowledge Spillover Theory of Entrepreneurship, applied to FDI, provides at least a partial explanation for the greater emergence of recent knowledge-based entrepreneurship in Ireland compared with Wales. In order to examine how FDI and entrepreneurship policy in these two...

Are there positive or negative externalities in knowledge production? We analyze whether current contributions to knowledge production increase or decrease the future growth of knowledge. To assess this, we use a randomized field experiment that added content to some pages in Wikipedia while...

The knowledge spillover theory of entrepreneurship predicts that entrepreneurial activity is greater in regions with more knowledge conditional on the commercialization efficiency of incumbents, which limits entrepreneurial discovery. We extend the theory to contend that localized competition...

Acs, Audretsch, Braunerhjelm, and Carlsson (2003) propose a new growth theory model featuring a geographically constrained spillover mechanism provided by new ventures and incumbent firms that convert a region’s stock of knowledge into economically useful, firm-specific knowledge. This implies...