Hoje deparei-me com esta possibilidade:
‘It appears more plausible that the people in the low-productivity areas were different from the people we are familiar with. Either they worked little or they exerted themselves little when at work (that is, they had different tastes) or their mental life is otherwise alien to us. They were not merely people like us who happened to be lacking certain pieces of knowledge.’ Clark, G. (1987). ‘Productivity growth without technical change in European agriculture before 1850’, Journal of Economic History, 47 (2), pp. 419-432 (p. 431)
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