What Has Been Happening to Aggregate Concentration in the U.S. Economy in the 21st Century?
2020 ◽
Vol 50
(2)
◽
pp. 114-126
2007 ◽
Vol 34
(1)
◽
pp. 25-55
◽
1986 ◽
Vol 23
(12)
◽
pp. 1217-1227
◽
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