A simple principal agent problem is experimentally investigated in which a principal repeatedly sets a wage and an agent responds by choosing an effort level. The principal's payoff is determined by the agent's effort. In a first setting, the principal can only set a fixed wage in each period....

We experimentally investigate a simple version of Holmstroem's career concerns model in which firms compete for agents in two consecutive periods. Profits of firms are determined by agents' unknown ability and the effort they choose. Before making second-period wage offers firms are informed...