Implications of Skill-Biased Technological Change: International Evidence*
发现发达国家普遍存在技能偏向型技术变革，导致对低技能劳动力需求下降，并通过增加全球非技能密集型产品供给压低其相对工资；发展中国家也出现技能溢价上升，与SBTC一致。
Demand for less-skilled workers plummeted in developed countries in the 1980s. In open economies, <it>pervasive</it> skill-biased technological change (SBTC) can explain this decline. SBTC tends to increase the domestic supply of unskill-intensive goods by releasing less-skilled labor. The more countries experiencing a SBTC, the greater its potential to decrease the relative wages of less-skilled labor by increasing the <it>world</it> supply of unskill-intensive goods. We find strong evidence for pervasive SBTC in developed countries. Most industries <it>increased</it> the proportion of skilled workers <it>despite</it> generally rising or stable relative wages. Moreover, the <it>same</it> manufacturing industries simultaneously increased demand for skills in <it>different</it> countries. Many developing countries also show increased skill premiums, a pattern consistent with SBTC.