This article evaluates the quality of workers' information regarding pension offerings using both administrative records and worker repor ts of pension provisions. Missing and incorrect information is widesp read. Unionized employees, higher income workers, better educated wor kers, and those with seniority are better informed about their pensio ns. There are also demographic differences: minorities have less pens ion knowledge than whites, but women are better informed than men alo ng several pension dimensions. Myopia about pension incentive structu res is troubling since workers may save or consume suboptimally, chan ge jobs, or retire earlier than they would have if equipped with bett er pension information. Copyright 1988 by University of Chicago Press.