Davis, coauthor Darren W. and Christian Davenport. 1999. “Assessing the Validity of the Postmaterialism Inde.x American Political Science Review 93: 649–664.
Davis, Darren W. and Christian Davenport. 1999. “Assessing the Validity of the Postmaterialism Index.” American Political Science Review 93: 649–664.