NOTE: In view of the lack of a comprehensive sampling frame for foreign-earned doctorates in the United States, few additions of segment seven cases have been made to the sample since the 1973 survey. Therefore, the number of science and engineering Ph.D.s who are foreign citizens may be somewhat underestimated.
aThese figures may represent more than the totals presented in the table.
bIncludes those individuals who were full-time employed, part-time employed, or on postdoctoral appointments.
cH%=Horizontal percentage. V%=Vertical percentage.
SOURCE: 1981 Survey of Doctorate Recipients, National Research Council.