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Working Paper
Production and Inventory Dynamics under Ambiguity Aversion
We propose a production-cost smoothing model with Knightian uncertainty due to ambiguity aversion to study the joint behavior of production, inventories, and sales. Our model can explain four facts that previous studies find difficult to account for simultaneously: (i) the high volatility of production relative to sales, (ii) the low ratio of inventory-investment volatility to sales volatility, (iii) the positive correlation between sales and inventories, and (iv) the negative correlation between the inventory-to-sales ratio and sales. We find that the stock-out avoidance motive (Kahn 1987) ...
Working Paper
Growth and Welfare Gains from Financial Integration Under Model Uncertainty
We build a robustness (RB) version of the Obstfeld (1994) model to study the effects of financial integration on growth and welfare. Our model can account for the empirically observed heterogeneity in the relationship between growth and volatility for different countries. The calibrated model shows that financial integration leads to significantly larger gains in growth and welfare for advanced countries than developing countries, with some developing countries experiencing growth and welfare loss in financial integration. Our analytical solutions help uncover the key mechanisms by which this ...
Working Paper
Are harsh penalties for default really better?
How might society ensure the allocation of credit to those who lack meaningful collateral? Two very different options that have each been pursued by a variety of societies through time and space are (i) relatively harsh penalties for default and, more recently, (ii) loan guarantee programs that allow borrowers to default subject to moderate consequences and use public funds to compensate lenders. The goal of this paper is to provide a quantitative statement about the relative desirability of these responses. Our findings are twofold. First, we show that under a wide array of circumstances, ...
Working Paper
A Model of Expenditure Shocks
We document four features of consumption and income microdata: (1) household-level consumption is as volatile as household income on average, (2) household-level consumption has a positive but small correlation with income, (3) many low-wealth households have marginal propensities to consume near zero, and (4) lagged high expenditure is associated with low contemporaneous spending propensities. Our interpretation is that household expenditure depends on time-varying consumption thresholds where marginal utility discontinuously increases. Our model with consumption thresholds matches the four ...
Working Paper
Loan guarantees for consumer credit markets
Loan guarantees are arguably the most widely used policy intervention in credit markets, especially for consumers. This may be natural, as they have several features that, a priori, suggest that they might be particularly effective in improving allocations. However, despite this, little is actually known about the size of their effects on prices, allocations, and welfare. ; In this paper, we provide a quantitative assessment of loan guarantees, in the context of unsecured consumption loans. Our work is novel as it studies loan guarantees in a rich dynamic model where credit allocation is ...
Working Paper
Saving Constraints, Debt, and the Credit Market Response to Fiscal Stimulus
We document that the interest rate response to fiscal stimulus (IRRF) is lower in countries with high inequality or high household debt. To interpret this evidence we develop a model in which households take on debt to maintain a consumption threshold (saving constraint). Now debt-burdened, these households use additional income to deleverage. In economies with more debt-burdened households, increases in government spending tighten credit conditions less (relax credit conditions more), leading to smaller increases (larger declines) in the interest rate. Our theoretical framework predicts that ...
Journal Article
The Racial Wealth Gap and Access to Opportunity Neighborhoods
Some Black households live in neighborhoods with lower incomes, as well as higher unemployment rates and lower educational attainment, than their own incomes might suggest, and this may impede their economic mobility. We investigate reasons for the neighborhood sorting patterns we observe and find that differences in financial factors such as income, wealth, or housing costs between Black and white households do not explain racial distributions across neighborhoods. Our findings suggest other factors are at work, including discrimination in the housing market, ongoing racial hostility, or ...
Working Paper
The Piketty Transition
We study the effects on inequality of a "Piketty transition" to zero growth. In a model with a worker-capitalist dichotomy, we show first that the relationship between inequality (measured as a ratio of incomes for the two types) and growth is complicated; zero growth can raise or lower inequality, depending on parameters. Extending our model to include idiosyncratic wage risk we show that growth has quantitatively negligible effects on inequality, and the effect is negative. Finally, following Piketty?s thought experiment, we study how the transition might occur without declining returns; ...
Working Paper
The Dynamics of the Racial Wealth Gap
We reconcile the large and persistent racial wealth gap with the smaller racial earnings gap, using a general equilibrium heterogeneous-agents model that matches racial differences in earnings, wealth, bequests, and returns to savings. Given initial racial wealth inequality in 1962, our model attributes the slow convergence of the racial wealth gap primarily to earnings, with much smaller roles for bequests or returns to savings. Cross-sectional regressions of wealth on earnings using simulated data produce the same racial gap documented in the literature. One-time wealth transfers have only ...
Working Paper
Bankruptcy and Delinquency in a Model of Unsecured Debt
This paper documents and interprets two facts central to the dynamics of informal default or "delinquency" on unsecured consumer debt. First, delinquency does not mean a persistent cessation of payment. In particular, we observe that for individuals 60 to 90 days late on payments, 85% make payments during the next quarter that allow them to avoid entering more severe delinquency. Second, many in delinquency (40%) have smaller debt obligations one quarter later. To understand these facts, we develop a theoretically and institutionally plausible model of debt delinquency and bankruptcy. Our ...