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Targeting with In-Kind Transfers: Evidence from Medicaid Home Care

American Economic Review 2019 109(4), 1461-1485 open access
Making a transfer in kind reduces its value to recipients but can improve targeting. We develop an approach to quantifying this tradeoff and apply it to home care. Using randomized experiments by Medicaid, we find that in-kind provision significantly reduces the value of the transfer to recipients while targeting a small fraction of the eligible population that is sicker and has fewer informal care-givers than the average eligible. Under a wide range of assumptions within a standard model, the targeting benefit exceeds the distortion cost. This highlights an important cost of recent reforms toward more flexible benefits.

Firms’ Internal Networks and Local Economic Shocks

American Economic Review 2019 109(10), 3617-3649 open access
Using confidential establishment-level data from the US Census Bureau’s Longitudinal Business Database, this paper documents how local shocks propagate across US regions through firms’ internal networks of establishments. Consistent with a model of optimal within-firm resource allocation, we find that establishment-level employment is sensitive to shocks in distant regions in which the establishment’s parent firm is operating, and that the elasticity with respect to such shocks increases with the firm’s financial constraint. At the aggregate regional level, we find that aggregate county-level employment is sensitive to shocks in distant counties linked through firms’ internal networks.

An Economic Analysis of Privacy Protection and Statistical Accuracy as Social Choices

American Economic Review 2019 109(1), 171-202 open access
Statistical agencies face a dual mandate to publish accurate statistics while protecting respondent privacy. Increasing privacy protection requires decreased accuracy. Recognizing this as a resource allocation problem, we propose an economic solution: operate where the marginal cost of increasing privacy equals the marginal benefit. Our model of production, from computer science, assumes data are published using an efficient differentially private algorithm. Optimal choice weighs the demand for accurate statistics against the demand for privacy. Examples from US statistical programs show how our framework can guide decision-making. Further progress requires a better understanding of willingness-to-pay for privacy and statistical accuracy.

Test Design and Minimum Standards

American Economic Review 2019 109(6), 2173-2207
We analyze test design and certification standards when an uninformed seller has the option to generate and disclose costly information regarding asset quality. We characterize equilibria by a minimum principle: the test and disclosure policy are chosen to minimize the asset’s value conditional on nondisclosure. Thus, when sellers choose the information provided, simple pass/fail certification tests are likely to dominate the market. A social planner could raise informational and allocative efficiency, and lower deadweight testing costs, by raising the certification standard. Monopolist certifiers also satisfy the minimum principle but set a higher standard and reduce testing rates to maximize revenue.

Does Helping John Help Sue? Evidence of Spillovers in Education

American Economic Review 2019 109(3), 1080-1115 open access
Does the impact of teachers extend beyond the students in their classroom? Using the natural transitions of students from multiple elementary schools into a single middle school, this paper provides a new method for isolating and quantifying peer spillover effects of teaching and shows that ignoring these spillovers underestimates a teacher’s value by at least 30 percent. Because the spillovers also affect teacher value-added estimates, I develop a method of moments estimator of teacher value-added and show that accounting for the spillovers does not have a large impact on the ranking of teachers in New York City. I conclude by showing that the spillovers occur within groups of students who share the same race and gender, which suggests that social networks play a critical role in disseminating the effect.

The Sources of Capital Misallocation

American Economic Review 2019 109(7), 2531-2567 open access
We develop a methodology to disentangle sources of capital “mis-allocation,” i.e., dispersion in value-added/capital. It measures the contributions of technological/informational frictions and a rich class of firm-specific factors. An application to Chinese manufacturing firms reveals that adjustment costs and uncertainty, while significant, explain only a modest fraction of the dispersion, which stems largely from other factors: a component correlated with productivity and a fixed effect. Adjustment costs are more salient for large US firms, though other factors still account for the bulk of the dispersion. Technological/markup heterogeneity explains a limited fraction in China, but a potentially large share in the United States.

Large Firm Dynamics and the Business Cycle

American Economic Review 2019 109(4), 1375-1425 open access
Do large firm dynamics drive the business cycle? We answer this question by developing a quantitative theory of aggregate fluctuations caused by firm-level disturbances alone. We show that a standard heterogeneous firm dynamics setup already contains in it a theory of the business cycle, without appealing to aggregate shocks. We offer an analytical characterization of the law of motion of the aggregate state in this class of models, the firm size distribution, and show that aggregate output and productivity dynamics display: (i ) persistence, (ii ) volatility, and (iii ) time-varying second moments. We explore the key role of moments of the firm size distribution, and, in particular, the role of large firm dynamics, in shaping aggregate fluctuations, theoretically, quantitatively, and in the data.

Pre-Event Trends in the Panel Event-Study Design

American Economic Review 2019 109(9), 3307-3338 open access
We consider a linear panel event-study design in which unobserved confounds may be related both to the outcome and to the policy variable of interest. We provide sufficient conditions to identify the causal effect of the policy by exploiting covariates related to the policy only through the confounds. Our model implies a set of moment equations that are linear in parameters. The effect of the policy can be estimated by 2SLS, and causal inference is valid even when endogeneity leads to pre-event trends (“pre-trends”) in the outcome. Alternative approaches perform poorly in our simulations.

The Taxing Deed of Globalization

American Economic Review 2019 109(2), 353-390 open access
This paper examines the effects of globalization on the distribution of worker-specific labor taxes using a unique set of tax calculators. We find a differential effect of higher trade and factor mobility on relative tax burdens in 1980–1993 versus 1994–2007 in the OECD. Prior to 1994, greater openness meant that higher income earners were taxed progressively more. However, after 1994, we document a globalization-induced rise in the labor income tax burden of the middle class, while the top 1 percent of workers and employees faced a reduction in their tax burden of 0.59–1.45 percentage points.