We analyze the evolution of the international collaboration network in photovoltaic research. Using data on scientific publications for the period 1980-2015, we apply social network analysis to trace the evolution of the global network of countries and national research networks of...

We investigate persistence and change of the levels of regional new business formation in West Germany over a period of thirty years. Our indicator is the position of a region in the national ranking. As indicated by previous studies, we generally find a rather high level of persistence and...

In the past decades the role of profit sharing schemes (PSS) as a way to foster innovation in a principal-agent context, and more generally of innovation in economic growth, have been widely acknowledged and studied. However, surprisingly little has been done to analyze the interactions between...

Bubbles are omnipresent in lab experiments with asset markets. But these experiments were (mostly) conducted in environments with only human traders. Today markets are substantially determined by algorithmic traders. Here we use a laboratory experiment to measure human trading behaviour changes...

We distinguish four types of regional growth regimes based on the type of relationship between new business formation and economic development. The distinguishing characteristics of these regime types are analyzed in order to identify the reasons for different growth performance. Although growth...

Should people be allowed to leave joint projects freely or should they be deterred from breaking off? This depends on why people stop collaborating and whether they have good reasons to do so. We explore the factors that lead to the breakdown of partnerships by studying a public good game with...

We consider in this paper whether the gender mix at the level of decision-makers in firms can influence gender representation at the employee level. We run a laboratory experiment whereby we present a pair of independent employers with applications from two potential employees. We consider...

We explore the role of different types of self-employment for a persistence of the regional level of entrepreneurship over time. Our analysis for West German regions shows relatively strong effects for the historical self- employment rate in the non-agricultural sector, particularly in...

We study in the laboratory the impact of private information revelation on the selection of partners when forming individual networks. Our experiment combines a "network game" and a "public-good game". In the network game, individuals decide with whom to form a link with, while in the...

Cluster studies have shown that innovation can be understood as the result of an inter- organizational process, where a division of labor with regard to exploration and exploitation exists among the actors inside the cluster. A cluster is ambidextrous if it manages to balance innovative...