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Working Paper
Explaining Educational Attainment across Countries and over Time
Consider the following facts. In 1950, the richest countries attained an average of 8 years of schooling whereas the poorest countries 1.3 years, a large 6-fold difference. By 2005, the difference in schooling declined to 2-fold because schooling increased faster in poor than in rich countries. What explains educational attainment differences across countries and their evolution over time? We consider an otherwise standard model of schooling featuring non- homothetic preferences and a labor supply margin to assess the quantitative contribution of productivity and life expectancy in explaining ...
Working Paper
Endogenous Social Distancing in an Epidemic
I present a model where work implies social interactions and the spread of a disease is described by an SIR-type framework where both susceptible and infectious are asymptomatic. Upon the outbreak of a disease a lower contact rate can be achieved at the cost of lower consumption. Individuals do not internalize the effects of their decisions on the evolution of the epidemic while the planner does. Specifically, the planner internalizes that a low contact rate early in the epidemic implies a low stock of infectious in the future; and a low stock of infectious in the future permits an increase ...
Working Paper
Comparative Advantage and Moonlighting
The proportion of multiple jobholders (moonlighters) is negatively correlated with productivity (wages) in cross-sectional and time series data, but positively correlated with education. We develop a model of the labor market to understand these seemingly contradictory facts. An income e?ect explains the negative correlation with productivity while a comparative advantage of skilled workers explains the positive correlation with education. We provide empirical evidence of the comparative advantage in CPS data. We calibrate the model to 1994 data on multiple jobholdings, and assess its ability ...
Working Paper
Explaining Cross-Cohort Differences in Life Cycle Earnings
College-educated workers entering the labor market in 1940 experienced a 4-fold increase in their labor earnings between the ages of 25 and 55; in contrast, the increase was 2.6-fold for those entering the market in 1980. For workers without a college education these figures are 3.6-fold and 1.5-fold, respectively. Why are earnings profiles flatter for recent cohorts? We build a parsimonious model of schooling and human capital accumulation on the job and calibrate it to earnings statistics of workers from the 1940 cohort. The model accounts for 99 percent of the flattening of earnings ...
Working Paper
Family Economics Writ Large
Powerful currents have reshaped the structure of families over the last century. There has been (i) a dramatic drop in fertility and greater parental investment in children; (ii) a rise in married female labor-force participation; (iii) a significant decline in marriage and a rise in divorce; (iv) a higher degree of positive assortative mating; (v) more children living with a single mother; (vi) shifts in social norms governing premarital sex and married women's roles in the workplace. Macroeconomic models explaining these aggregate trends are surveyed. The relent-less flow of technological ...
Working Paper
Fertility Shocks and Equilibrium Marriage-Rate Dynamics
Why did the marriage probability of single females in France after World War 1 rise 50% above its pre-war average, despite a 33% drop in the male/female singles ratio? We conjecture that war-time disruption of the marriage market generated an abnormal abundance of men with relatively high marriage propensities. Our model of matching over the lifecycle, when calibrated to pre-war data and two war-time shocks, succeeds in matching the French time path under the additional assumption of a pro-natalist post-war preference shock. We conclude that endogeneity issues make the sex ratio a potentially ...
Working Paper
The Baby Boomers and the Productivity Slowdown
The entry of baby boomers into the labor market in the 1970s slowed growth for physical and human capital per worker because young workers have little of both. Thus, the baby boom could have contributed to the 1970s productivity slowdown. I build and calibrate a model a la Huggett et al. (2011) with exogenous population and TFP to evaluate this theory. The baby boom accounts for 75% of the slowdown in the period 1964-69, 25% in 1970-74 and 2% in 1975-79. The retiring of baby boomers may cause a 2.8pp decline in productivity growth between 2020 and 2040, ceteris paribus.
Working Paper
A quantitative analysis of China’s structural transformation
Between 1978 and 2003 the Chinese economy experienced a remarkable 5.7 percent annual growth of GDP per labor. At the same time, there has been a noticeable transformation of the economy: the share of workers in agriculture decreased from over 70 percent to less than 50 percent. We distinguish three sectors: private agriculture and nonagriculture and public nonagriculture. A growth accounting exercise reveals that the main source of growth was TFP in the private nonagricultural sector. The reallocation of labor from agriculture to nonagriculture accounted for 1.9 percent out of the 5.7 ...
Blog
COVID-19 and the Importance of Testing
Using only the number of confirmed COVID-19 cases does not help us understand the scope of the pandemic.
Blog
How Fast Has COVID-19 Been Spreading?
For many countries, the number of COVID-19 cases seems to double every few days.