Arent and Nagl (2013) use the BA Employment panel 1998-2007 to identify effects of the German Hartz reform. Their findings suggest that the reform caused a considerable reduction of wages. Our replication of their study suggests that their clear and strong conclusions are driven by a too coarse...

Arent and Nagl (2013) use the BA Employment panel 1998-2007 to identify effects of the German Hartz reform and find that it caused a considerable reduction of wages. Our replication study suggests that their clear and strong conclusions are based on implausible assumptions regarding the error...

To assess the substitutability between workers within a firm, and between incumbent workers and outsiders, we estimate how exogenous worker exits affect a firm’s demand for incumbent workers and new hires. Using matched employer-employee data from Germany, we analyze the effects of 34,000...