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Continue to ChatBy a combination of formal training and self study, the latter continuing systematically well into the 1940s, I was able to gain a broad base of knowledge in economics and political science, together with reasonable skills in advanced mathematics, symbolic logic, and mathematical statistics. - Herbert A. Simon from https://whatsmyquote.com/quote/by-a-combination-of-formal-training-and-self-study-the-latter-continuing-systematically-well-into-the-1940s-i