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α: calibrated so average coauthorship-adjusted count equals average raw count
I present causal evidence on the effect of women's entry into occupations on wages in the United States. I construct a shift-share instrument that interacts the dramatic increase in women's educational attainment and workforce participation from 1960 to 2010 with the likelihood that men and women enter each occupation. I find that a 10 percentage-point increase in the female fraction within an occupation leads to an 8 percent decrease in average male wage and a 7 percent decrease in average female wage in the concurrent census year, and an 9 percent decrease in male wages and a 14 percent decrease in female wages over 10 years.