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Working Paper
Human capital portfolios
This paper assesses the trade-off between acquiring specialized skills targeted for a particular occupation and acquiring a package of skills that diversifies risk across occupations. Individual-level data on college credits across subjects and labor-market dynamics reveal that diversification generates higher income growth for individuals who switch occupations whereas specialization benefits those who stick with one type of job. A human capital portfolio choice problem featuring skills, abilities, and uncertain labor outcomes replicates this general pattern and generate a sizable amount of ...
Discussion Paper
Wage Growth over Unemployment Spells
This article looks at the wage growth associated with a spell of unemployment during the past three recessions. Our main findings are threefold. First, half of all unemployed workers experience a lower hourly wage once they regain employment. Second, after an unemployment spell, older workers and those without a college degree experience lower wage rowth. Third, workers who regain employment in a different industry than they were in previously tend to experience a substantial wage decline. The analysis suggests that the COVID-19 pandemic not only led to unprecedented job losses, but it could ...
Discussion Paper
Wage Growth over Unemployment Spells
This article looks at the wage growth associated with a spell of unemployment during the past three recessions. Our main findings are threefold. First, half of all unemployed workers experience a lower hourly wage once they regain employment. Second, afteran unemployment spell, older workers and those without a college degree experience lower wage growth. Third, workers who regain employment in a different industry than they were in previously tend to experience a substantial wage decline. The analysis suggests that the COVID-19 pandemic not only led to unprecedented job losses, but it could ...
Working Paper
Accounting for the cyclical dynamics of income shares
Over the business cycle, labor's share of output is negatively but weakly correlated with output, and it lags output by about four quarters. Profit's share is strongly procyclical. It neither leads nor lags output, and its volatility is about four times that of output. Despite the importance of understanding the dynamics of income shares for understanding aggregate technology and the degree of competition in factor markets, macroeconomics lacks models that can account for these dynamics. This paper constructs a model that can replicate those facts. We introduce costly entry of firms in a ...
Working Paper
Bundling Time and Goods: Implications for Hours Dispersion
We document the large dispersion in hours worked in the cross-section. We account for this fact using a model in which households combine market inputs and time to produce a set of nonmarket activities. To estimate the model, we create a novel data set that pairs market expenditures and time use at the activity level using data from the Consumer Expenditure Survey and the American Time Use Survey, respectively. The estimated model can account for a large fraction of the dispersion of hours worked in the data. The substitutability between market inputs and time within an activity and across a ...
Working Paper
Luxuries, Necessities, and the Allocation of Time
Households enjoy utility from activities that require a combination of time and goods. We classify activities into two types: luxuries and necessities. Luxuries (necessities) are activities for which time and expenditure shares rise (decline) with income. We develop and estimate a model with nonhomothetic preferences and find that time and goods are substitutable in producing activities. Activities are also substitutable among themselves. Hence, wage and price changes cause large reallocations of time and expenditures across activities. This effect is quantitatively important for welfare ...
Working Paper
Housing, portfolio choice, and the macroeconomy
Much of the macroeconomics literature dealing with wealth distribution has become abstracted from modeling housing explicitly. This paper investigates the properties of the wealth distribution and the portfolio composition regarding housing and equity holdings and their relationship to macroeconomic shocks. To this end, I construct a business cycle model in which agents differ in age, income, and wealth and derive utility from housing services. The model is consistent with several facts such as the life-cycle pattern of housing-to-wealth ratios, the larger degree of concentration for ...
Working Paper
Fixed-term and permanent employment contracts: theory and evidence
This paper constructs a theory of the coexistence of fixed-term and permanent employment contracts in an environment with ex ante identical workers and employers. Workers under fixed-term contracts can be dismissed at no cost while permanent employees enjoy labor protection. In a labor market characterized by search and matching frictions, firms find it optimal to discriminate by offering some workers a fixed-term contract while offering other workers a permanent contract. Match-specific quality between a worker and a firm determines the type of contract offered. We analytically characterize ...
Working Paper
Capital-skill complementarity and inequality: a sensitivity analysis
In ?Capital-Skill Complementarity and Inequality: A Macroeconomic Analysis,? Krusell et al. (2000) analyzed the capital-skill complementarity hypothesis as an explanation for the behavior of the U.S. skill premium. This paper shows that their model?s fit and the values of the estimated parameters are very sensitive to the data used: Alternative measures of the capital series predict skill premia that bear little resemblance to the data. We also include ten additional years of data to address the claim made by other authors that the evolution of the skill premium changed during the 1990s, but ...
Working Paper
Productivity, energy prices, and the Great Moderation: a new link
We study how total factor productivity (TFP), energy prices, and the Great Moderation are linked. First we estimate a joint stochastic process for the energy price and TFP and establish that until the second quarter of 1982, energy prices negatively affected productivity. This spillover has since disappeared. Second, we show that within the framework of a dynamic stochastic general equilibrium model, the disappearance of this energy-productivity spillover generates the significantly lower volatility of output and its components. Specifically, the change in the joint stochastic process ...