the nds determined demographics of tenured / tenure track faculty in a discipline at pertinent departments of "top" universities, ranked by the national science foundation( nsf) according to research funding expenditures in that discipline. the fy2002 data were the first such data published, disaggregated by gender, by race, and by rank, about faculty at the top 50 research universities in each of 14 science and engineering disciplines. the fy2005 survey was expanded to include the "top 100" departments in each of 15 disciplines (adding earth science). in some cases, slightly fewer than 100 schools were ranked by nsf for a discipline. data were collected by surveying department chairs, who provided their own department's faculty data, disaggregated by gender, by race/ethnicity, and by rank.