Where Do New US-Trained Science-Engineering PhDs come from?
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This study shows that the demographic and institutional origins of new US trained science and engineering PhDs changed markedly between the late 1960s-1970s to the 1990s-early 2000s. In 1966, 71% of science and engineering PhD graduates were US-born males, 6% were US-born females, and 23% were
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美国国家经济研究局创建时间：
2004-06-01
