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作者:BROOKSHIRE, DS; THAYER, MA; SCHULZE, WD; DARGE, RC
作者单位:University of Missouri System; Missouri University of Science & Technology
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作者:ARVAN, L; MOSES, LN
作者单位:University of Illinois System; University of Illinois Urbana-Champaign; Northwestern University
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作者:FELDSTEIN, M
作者单位:National Bureau of Economic Research; Harvard University
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作者:BULLOCK, K; LACROIX, SJ
作者单位:University of Washington; University of Washington Seattle; University of Hawaii System