Card, D. E., & DiNardo, J. E. (2002). Skill biased technological change and rising wage inequality: Some problems and puzzles. National Bureau of Economic Research.
Lua i Stíl Chicago (17ú heag.)Card, David E., agus John E. DiNardo. Skill Biased Technological Change and Rising Wage Inequality: Some Problems and Puzzles. Cambridge, Mass: National Bureau of Economic Research, 2002.
Lua MLA (9ú heag.)Card, David E., agus John E. DiNardo. Skill Biased Technological Change and Rising Wage Inequality: Some Problems and Puzzles. National Bureau of Economic Research, 2002.
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