One of the most important long-run trends in the U.S. labor market is polarization, defined as the relative growth of employment in high-skill jobs (such as management and technical positions) and low-skill jobs (such as food-service and janitorial work) amid the concurrent decline in...

What is the macroeconomic implications of inequality caused by technological progress? Using a standard over-lapping-generations model with skill heterogeneity and the Roy-type occupational choice, this paper examines how routine-biased technological change impacts income distribution and...

We build an analytically and computationally tractable stochastic equilibrium model of unemployment in heterogeneous labor markets. Facing search frictions within markets and reallocation frictions between markets, workers endogenously separate from employment and endogenously reallocate between...

This paper studies the extent to which the cyclicality of gross and net occupational mobility shapes that of aggregate unemployment and its duration distribution. Using the SIPP, we document the relation between workers' (gross and net) occupational mobility and unemployment duration over the...

This paper examines how job quality varies over the cycle. Empirical evidence from the National Longitudinal Survey of Youth (NLSY) suggests match quality is procyclical. This interpretation is corroborated in a calibrated model with on-the-job search. In the model, more high quality matches are...

This paper studies the extent to which the cyclicality of gross and net occupational mobility shapes that of aggregate unemployment and its duration distribution. Using the SIPP, we document the relation between workers' (gross and net) occupational mobility and unemployment duration over the...

We develop a heterogeneous-agent New Keynesian model featuring a frictional labor market with on-the-job search to quantitatively study the positive and normative implications of employer-to-employer (EE) transitions for inflation. We find that EE dynamics played an important role in shaping the...

This paper expands on the methodology of Groshen and Potter (2003) for studying cyclical and structural changes in the US economy and analyzes the net structural and cyclical employment trends in the US economy during the last 10 trough-to-trough business cycles from 1949 to the present. It...

An informal model is described that leads to multiple macroeconomic equilibria as a consequence of random variation in the relative amounts of technological change for new and existing goods. The novel observation is that the rate of introduction and market penetration of new goods vis-a-vis...

This paper first documents the increase in the time lag with which labor input reacts to the economy's driving structural shocks ("the labor adjustment lag") that is visible in US data since the mid-1980s. We show that lagged labor adjustment is optimal in a setting where there is uncertainty...