gssclass4.dta | 8 cases dropped if inc>=100 and class==1; revised labels | cda-gssclass4-supportV2.do scott long 2013-11-20.
gssclass4V1.dta | MakeOrdinalClassIdDataset-2013-10-17.do jeremy freese 2013-10-17.
data extracted from Smith, Tom W., Peter V. Marsden, and Michael Hout. General Social Survey, 1972-2012 [Cumulative File]. Version 1. National Opinion Research Center.  http://www3.norc.org/GSS+Website/.
scaled to 2012 dollars