Die Dissertation umfasst vier Einzelbeiträge aus dem Bereich der Mittelstandsforschung. Der Autor zeigt hierbei auf, dass die übergreifenden Themenfelder Innovation und Konjunktur jeweils für sich genommen dazu geeignet sind, die möglichen Besonderheiten kleinerer Unternehmen zu untersuchen....

Using data from the CPS this paper examines the role of birth-country networks on immigrants' unemployment duration from 2001 to 2013. We find that networks significantly lower unemployment duration for all immigrants. Varying the effect of networks over duration categories we find that networks...

In the presence of dispersed information, agents may decide to take into account the actions of other agents because of the possible additional information conveyed by these actions. We call the act of using other agents' actions in the individual decision process social learning. This paper...

In a wide variety of social settings (e.g. crime, education, political activism, technology adoption), players' returns to their efforts depend on how much effort others exert. Modeling these situations as a network game with strategic complementarities, we show that a player's cycle centrality...

We construct a model of cyclical growth with agent-based features designed to study the network origins of aggregate fluctuations from a demand-side perspective. In our model, aggregate fluctuations result from variations in investment behavior at firm level motivated by endogenously-generated...

We analyze how economic conditions at the time of arrival affect the economic integration of family-sponsored migrants in the U.S. Our identification strategy exploits long waiting times for family-sponsored immigration visas that decouple the migration decision from economic conditions at the...