Article dans une revue: We test the wealth maximization theory of quitting behavior on the German Socioeconomic Panel (1985-2003). With the interpretation of job satisfaction as an expression of the experienced preference for the present job against available alternatives, the propensity to stay in the present job is simply related to the residual of a job satisfaction equation. We show that this residual is a better predictor of quits than the overall level of satisfaction. Furthermore, we validate a dynamic extension of the economic theory of quits for which uncertainty in the expectation of future events plays a decisive role.