Skill Premiums and the Supply of Young Workers in Germany
研究了1980至2008年德国技能溢价的变化，发现中低技能溢价上升几乎只发生在30岁及以下工人中，并证明相对劳动力供给变化能很好解释这一现象，其中本土人口教育程度变化是主因，低技能移民作用次要。
In this paper, we study the development and underlying drivers of skill premiums in Germany between 1980 and 2008. We show that the significant increase in the medium-to-low skill premium since the late 1980s was almost exclusively concentrated among workers aged 30 or below. Using a nested CES production function framework which allows for imperfect substitutability between young and old workers, we show that changes in relative labor supplies can explain these patterns very well. A cohort-level analysis reveals that distinct secular changes in the educational attainment of the native population are the primary source of the declining relative supply of medium-skilled workers in Germany. Low-skilled immigration, in contrast, only plays a secondary role in explaining the rising lower-end wage inequality in Germany over recent decades.