Sweden has experienced a substantial increase in temporary work over the 1990s, with most of the rise occurring during a severe macroeconomic recession with mass unemployment. By the early 1990s, workers on fixed-term contracts accounted for 10 percent of the number of employees; by the end of...

Since 2003 the German Public Employment Service (PES) has been experimenting with the contracting out of various services. One of the new labour market programmes is the Personnel Service Agencies, which provide client firms with jobseekers on a temporary assignment basis and are responsible for...

This paper shows that reciprocity has powerful implications for many economic domains. It is an important determinant in the enforcement of contracts and social norms and enhances the possibilities of collective action greatly. Reciprocity may render the provision of explicit incentive...

Field evidence suggests that agents belonging to the same group tend to behave similarly, i.e., behavior exhibits social interaction effects. Testing for such effects raises severe identification problems. We conduct an experiment that avoids these problems. The main design feature is that each...

Economic behavior often takes place in groups of small numbers of people interacting with each other (like work teams, neighborhoods, social networks, etc.). Characteristic of such interaction is the development of (affective) interpersonal relationships, or social ties. According to...

This paper studies the relevance of social interactions among the unemployed. Identification is based on a salient and selective extension of the potential duration of unemployment benefits. If social interactions are important, ths policy change affects entitled individuals not only directly,...

This paper studies the joint effect of fractionalization and inequality on the size of government. Within a political economy model of tax determination, I study the effect of voters with a group-based social conscience, so they care more about the well-being of those belonging to their own...

In many business transactions, in labor-management relations, in international conflicts, and welfare state reforms claims acquired in the past seem to create strong entitlements that shape current negotiations. Despite their importance, the role of entitlements in negotiations has not received...