Endogenous skill biased technical change: testing for demand pull effect
利用1990年德国统一作为自然实验，检验生产要素供给增加是否引发技能偏向型技术变革，发现该效应不存在，劳动力市场灵活化和税制改革才是关键。
In this article we use the unification of Germany in 1990 to test the hypothesis that an increase in the supply of a production factor generates skill biased technical change. We test for this mechanism in the context of the model presented by Acemoglu and Autor (2011, Skills, tasks and technologies: implications for employment and earnings', in O. Ashenfelter and D. Card (eds), Handbook of Labor Economics, Vol. 4B. Amsterdam: North Holland) that allows endogenous assignment of skills to tasks in the economy. We use cohorts of workers from comparable countries as a control group. After discussing the possible confounding factors, we conclude that this effect is absent. The differential pattern among the countries seems to be determined by labor market flexibilization and tax reform.