We study a contract change for tea pluckers on an Indian plantation, with a higher government-stipulated baseline wage. Incentive piece rates were lowered or kept unchanged. Yet, in the following month, output increased by 20 to 80 percent. This response contradicts the standard model and several variants, is only partly explicable by greater supervision, and appears to be "behavioral." But in subsequent months, the increase is comprehensively reversed. Though not an unequivocal indictment of "behavioral" models, these findings suggest that nonstandard responses may be ephemeral, and should ideally be tracked over an extended period of time. (JEL D82, D86, J33, J41, J43, O13, Q12)We study the productivity impact of a contract change. The setting is a tea plantation in India. The activity in question is tea-plucking, the output of which is measurable and contractible. Payments to pluckers consist of a baseline wage, along with piece rates per kilogram (kg) of output that vary over different production intervals. In 2008, a contract change was instituted as part of a customary practice of renegotiation once every three years. This plantation represented only a fraction of the negotiating parties, which involved representatives from some 20 unions and large plantations operating in the tea-growing region, with no dominant players on either side of the table. Negotiations commenced a few months prior to the expiration of the going contract, and went through several rounds.The new contract increased the baseline wage by approximately 30 percent. Almost all of this increase was mandated by state government legislation. In June 2008, the government announced a preliminary notification under the Minimum Wages Act, 1948, setting the minimum daily wage payable to plantation workers in the state at Rs 102 (US$2.25). The baseline in force in our plantation was, at