Wage Uncertainty and the Labour Supply of Self‐Employed Workers
利用美国男性自雇者的PSID数据，发现过去工资的标准差（衡量工资不确定性）显著正向影响其劳动供给，而工资水平本身无显著影响，表明自雇者通过延长工时来应对不确定性。
We analyse the effects of wage uncertainty on the labour supply of self-employed workers, using PSID data on self-employed American males. The standard deviation of past wages, as a measure of wage uncertainty, is the key determinant of male self-employed labour supply, with a significant positive effect. In contrast there is no effect from the (instrumented) wage or other explanatory variables. Our findings are consistent with the self-employed 'self-insuring' in response to greater uncertainty by working longer hours, and they can also help explain why self-employed Americans work longer average hours for lower average wages than their employee counterparts.