The economic burden of an aging population depends partly on older adults' employment rates, which in turn depend partly on employers' willingness to hire and retain them. This report reviews the literature on managerial attitudes toward older workers. Although the available evidence is incomplete and sometimes inconsistent, many firms appear to have serious reservations about older workers. Employment prospects may be especially bleak for rank-and-file workers and those with limited skills. Managerial attitudes toward older workers may improve in the future, however, as the population and workforce age.