Exposure to minimum wages at young ages could lead to adverse longer-run effects via decreased labor market experience and tenure, and diminished education and training, while beneficial longer-run effects could arise if minimum wages increase skill acquisition. Evidence suggests that as individuals reach their late 20s, they earn less the longer they were exposed to a higher minimum wage at younger ages, and the adverse longer-run effects are stronger for blacks. If there are such longer-run effects of minimum wages, they are likely more significant than the contemporaneous effects on youths that are the focus of research and policy debate. (Contains 6 tables and 8 footnotes.)