SESTATScientists and Engineers Statistical Data System
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Following Elfenbein, Hamilton, and Zenger (2010), data used to analyze the hypotheses come from NSF's private SESTAT panel database.
Still, the SESTAT data set trades off richness of data per individual (i.e., frequency of data collection, and extent of information provided by the data) for the breadth of coverage across individuals.
(10.) Unfortunately, the SESTAT database offers no data regarding majors, subjects studied, or university grades.
National Science Foundation, 2003: Characteristics of scientists and engineers in the United States: 2003 (SESTAT).
Thus, SESTAT includes a weighting factor that we use in this analysis.
Using 2003 data regarding holders of doctorate degrees, SESTAT reports put the number at 51% of engineers and 48% of those working in math and computer science.
These estimates, and others shown in Table 6 from the NSF SESTAT data file, are underestimates of the total proportion of foreign-born scientists in the United States.