I have done research for the past three decades on the United States power elite. My main interest has been in the extent to which the power elite has included members of previously excluded groups (Jews, women, African Americans, Latinos, Asian Americans and openly gay men and lesbians), the reasons they have been included and the effects on their identities once they have become part of the power elite. I also have done research on a variety of topics in personality and social psychology, including the psychological effects of unusual names, birth order, attitudes toward and knowledge about nuclear war, self monitoring, and music preferences.