阿西莫格鲁、约翰逊和罗宾逊告诫人们，麦迪森有关1820年前的数据 “仅凭经验猜测”。

Messrs Acemoglu, Johnson and Robinson caution that Maddison’s figures for the years before 1820 are “no more than educated guesses”.

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麦迪森对人均GDP的估算，为达龙•阿西莫·格鲁、西蒙·约翰逊和詹姆斯·罗宾逊于2005年提出的重要论文提供了有用的经验核查。

His estimates of per head GDP provide a useful empirical crosscheck for a grand thesis proposed by Daron Acemoglu, Simon Johnson and James Robinson in 2005.

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