This article considers the problem of deriving a numerical measure of segregation, i.e., a measure of inequality in the distribution of people across groups. It proposes a list of eight desirable properties for a good numerical measure of segregation. These properties yield a class of...

Employers often shed older workers by encouraging them to "take" early retirement. An implicit contract model suggests that this behavior will be influenced by the social security early retirement program. When demand is weak and layoffs are necessary, social security benefits can act like a...