OCCUPATIONAL SPECIFICITY OF HUMAN CAPITAL*
研究发现职业任期对工资有显著正向影响，5年职业任期可带来12%-20%的工资增长，且职业经验比行业或雇主任期更能解释工资差异，支持人力资本具有职业特异性。
We find that returns to occupational tenure are substantial. Everything else being constant, 5 years of occupational tenure are associated with an increase in wages of 12%–20%. Moreover, when occupational experience is taken into account, tenure with an industry or employer has relatively little importance in accounting for the wage one receives. This finding is consistent with human capital being occupation specific.