In this paper we describe the hypothesis of effort-based career opportunities as a situation in which profit maximizing firms create incentives for employees to work longer hours than the bargained ones, by making career prospects dependent on working hours. When effortbased career opportunities...

We use small Italian regions (i.e. provinces) to investigate the causal effect of foreign immigration on innovation during 2003-2008. Using instrumental variables estimation (based on immigrants' enclaves), we find that the overall stock of immigrants did not have any effect on innovation....