A stratified, multistage probability sample was created on the basis of the 2000 U.S. Census. Respondents received a letter describing the survey and their potential participation several days before in-person contact was made. Interviews were conducted by professional interviewers who had obtained extensive training and were closely supervised by the Institute for Social Research. The administration of the interview was completed face-to-face with the assistance of a laptop computer. The overall response rate was 70.9%. The data were weighted to adjust for discrepancies between the sample and the U.S. Census in terms of geographic and sociodemographic variables (Kessler et al., 2004).
