We investigate the efficiency of piece-rate contracts using data from a field experiment, conducted within a tree-planting firm. During the experiment, the piece rate paid to planters was exogenously increased. Regression methods yield an estimate of the elasticity of output with respect to...

We consider the response to incentives as an explanation for productivity differences within a firm that paid its workers piece rates. We provide a framework within which observed productivity differences can be decomposed into two parts: one due to differences in ability and the other due to...