A unique dataset is used to separately analyze the social origins of left-wing and nationalist-separatist terrorism in 17 Western European countries between 1970 and 2007. We argue that the differences in the historic roots, ultimate goals as well as their negotiability, levels of domestic and...

This paper studies collective contests with endogenous cost sharing, general effort costs and intra-group heterogeneity of prize-valuation. Our objective is to clarify the relationship between cost sharing, intra-group heterogeneity within the competing groups and the elasticity of the marginal...

This paper studies how changes in the two key parameters of unemployment insurance the benefit replacement rate (RR) and the potential duration of benefits (PBD) affect the duration of unemployment. In 1989, the Austrian government made unemployment insurance more generous by changing,...