Victor Hernandez Martinez

This paper tests the existence of capital-skill complementarity in the manufacturing sector using quasi-experimental increases in the relative price of low-skill labor induced by the US shale boom. I find that in response to the shale boom, local manufacturing firms decreased their relative usage of low-skill labor while increasing their capital expenditures. These endogenous changes in the input mix allowed manufacturers to maintain the value added despite the increase in the price of low-skill labor, avoiding the potential short-term crowding-out effects of the natural resource boom. Combined with the findings of previous work, my results indicate that the degree of skill substitutable with capital in manufacturing has increased over the last several decades.

This paper documents a novel finding indicating that re-employment wages are elastic to the level of unemployment insurance (i.e., a binding reservation wage) and adapts the IV estimator for duration dependence in Schmieder et al. (2016) to account for this fact. Using administrative data from Spain, we find that unemployed workers lower their re-employment wages by 3 percent immediately after the exhaustion of unemployment insurance (UI) benefits. Workers’ characteristics and permanent unobserved heterogeneity cannot explain this. To estimate duration dependence, we extend the IV framework proposed by Schmieder et al. (2016), whose estimator of duration dependence is proportional to the response of wages to an extension of the potential duration of UI, to account for the response of reservation wages. We find that while extending the potential duration of UI has an insignificant effect on re-employment wages, duration dependence is strongly negative. We estimate that the degree of duration dependence in Spain is approximately 0.8 percent per month in daily wages. Workers’ inability to find full-time jobs as the duration of non-employment increases is an important mechanism behind this effect, since the duration dependence of hourly wages is 0.25 percent per month. Failing to account for the fact that reservation wages are binding would underestimate the magnitude of duration dependence by 15 to 20 percent.

This paper studies the impact of knowledge specialization on earnings losses following displacement. We develop a novel measure of the specialization of human capital, based on how concentrated the knowledge used in an occupation is. Combining our measure with individual labor histories from the NLSY 79-97 and Norway’s LEED, we show that workers with more specialized human capital suffer larger earnings losses following exogenous displacement. A one standard deviation increase in pre-displacement knowledge specialization increases the earnings losses post-displacement by 3 to 4 pp per year in the US, and by 1.5 to 2 pp per year in Norway. In the US, the negative effect of higher pre-displacement knowledge specialization on post-displacement earnings is driven by the negative impact of knowledge specialization on well-paid outside opportunities. By contrast, this association between outside opportunities and knowledge specialization plays no role in post-displacement earnings losses in Norway, where the negative effect of specialization is in part explained by its association with the routine content and the offshoring probability of the occupation.

This paper argues that the value of unemployment insurance (UI) can be decomposed into a liquidity component and an insurance component. While the liquidity component captures the value of relieving the cost to access liquidity during unemployment, the insurance component captures the value of protecting the worker against a potential permanent future income loss. We develop a novel sufficient statistics method to identify each component that requires only the labor supply responses to changes in the potential duration of UI and severance payment and implement it using Spanish administrative data. We find that the liquidity component represents half of the value of UI, while the insurance component captures the remaining half. However, the relevance of each component is highly heterogeneous across different groups of workers. Poorer and wealthier workers are both similarly liquidity-constrained, but poorer workers place a higher value on UI because the insurance component is significantly more important for them. On the other hand, wealthier workers and workers with more cash-on-hand value additional UI equally, but the wealthier value its liquidity, while those with more liquidity care about its insurance value. Finally, from a welfare perspective, we show that extending the potential duration of Spain’s UI would increase welfare. However, in our counterfactual case where UI is complemented with the provision of liquidity, the optimal potential duration of Spain's UI should be lower than its current level.

The US shale boom reduced the earnings gap between college- and non-college-educated workers. The IRA and CHIPS Act could have similar impacts on affected communities.

Has monetary policy tightening impacted the labor market? The differential evolution of vacancies across industries and states since March 2022 suggests that this is the case.