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Gordon, Roger H. and Kopczuk, Wojciech (2011) The choice of the personal income tax base. Public Economics Programme Papers (PEP 11). Suntory and Toyota International Centres for Economics and Related Disciplines, London, UK.
Gordon, Roger H. and Schankerman, Mark ORCID: 0009-0006-1071-7672 (1987) Estimating the effects of r&d on Bell system productivity: a model of embodied technical change. . National Bureau of Economic Research, Cambridge, MA., USA.