Albrecht, James W.; Björklund, Anders; Vroman, Susan B. - 2009
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In addition to union status, the variables that we use to explain the log wage are
gender, years of work … status, a gender dummy, years of work experience, years of work
experience squared (divided by 100), years of tenure, years … emphasize the increased supply of university graduates over this period. The
returns to gender, education and experience remain …