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Inferring Correlations of Asset Values and Distances-to-Default from CDS Spreads: A Structural Model Approach

The Review of Asset Pricing Studies 2015 5(1), 112-154
Using structural credit risk models to estimate default dependence requires estimates of correlations of changes in distance-to-default. We present a structural model that yields simple relations between asset value, distance-to-default, and CDS spreads, allowing the correlations to be estimated from CDS spreads. We generalize the model to include a randomly varying default boundary; in this version the distance-to-default dynamics also depend on the movement of the default boundary. The CDS spread correlations we estimate exceed equity correlations, consistent with a randomly varying default boundary. We also present evidence that variations in funding liquidity affect the correlations, consistent with recent models.

Dissecting the Effect of Credit Supply on Trade: Evidence from Matched Credit-Export Data

Review of Economic Studies 2015 82(1), 333-359 open access
We estimate the elasticity of exports to credit using matched customs and firm-level bank credit data from Peru. To account for non-credit determinants of exports, we compare changes in exports of the same product and to the same destination by firms borrowing from banks differentially affected by capital-flow reversals during the 2008 financial crisis. We find that credit shocks affect the intensive margin of exports, but have no significant impact on entry or exit of firms to new product and destination markets. Our results suggest that credit shortages reduce exports through raising the variable cost of production, rather than the cost of financing sunk entry investments.

The Structure of Voluntary Disclosure Narratives: Evidence from Tone Dispersion

Journal of Accounting Research 2015 53(2), 241-274
We examine tone dispersion, or the degree to which tone words are spread evenly within a narrative, to evaluate whether narrative structure provides insight into managers’ voluntary disclosures and users’ responses to those disclosures. We find that tone dispersion is associated with current aggregate and disaggregated performance and future performance, managers’ financial reporting decisions, and managers’ incentives and actions to manage perceptions. Furthermore, we find that tone dispersion is associated with analysts’ and investors’ responses to conference call narratives. Our results suggest that tone dispersion both reflects and affects the information that managers convey through their narratives.

Goods Prices and Availability in Cities

Review of Economic Studies 2015 82(1), 258-296
This article uses detailed barcode data on purchase transactions by households in 49 U.S. cities to calculate the first theoretically founded urban price index. In doing so, we overcome a large number of problems that have plagued spatial price index measurement. We identify two important sources of bias. Heterogeneity bias arises from comparing different goods in different locations, and variety bias arises from not correcting for the fact that some goods are unavailable in some locations. Eliminating heterogeneity bias causes 97% of the variance in the price level of food products across cities to disappear relative to a conventional index. Eliminating both biases reverses the common finding that prices tend to be higher in larger cities. Instead, we find that price level for food products falls with city size.

Valuing convertible bonds and the option to exchange bonds for stock

Journal of Corporate Finance 2015 31, 91-115
The value of a conventional convertible bond is the value of a straight bond plus the value of the option to exchange it for a specified number of shares of common stock. First, I develop a closed-form contingent-claims convertible bond valuation model that quantifies the value of the exchange option when the short-term riskless rate, the firm's credit spread, and its share price are stochastic. I model the firm's decision to force early conversion as a stopping time problem in which the firm forces conversion as soon as the conversion value reaches the forced conversion barrier. I empirically validate the model by comparing model and market prices for a sample of 148 corporate convertible bonds issued between 2006 and 2010. The average median and mean pricing errors are −0.18% and 0.21%, respectively, which are within the average bid–ask spread for convertible bonds during the sample period. I use the model to quantify the disruptive impact that the prohibition on short selling during the recent financial crisis had on convertible bond prices.

Identification of Nonseparable Triangular Models With Discrete Instruments

Econometrica 2015 83(3), 1199-1210
We study the identification through instruments of a nonseparable function that relates a continuous outcome to a continuous endogenous variable. Using group and dynamical systems theories, we show that full identification can be achieved under strong exogeneity of the instrument and a dual monotonicity condition, even if the instrument is discrete. When identified, the model is also testable. Our results therefore highlight the identifying power of strong exogeneity when combined with monotonicity restrictions.

Consumer Inattention and Bill-Shock Regulation

Review of Economic Studies 2015 82(1), 219-257
For many goods and services such as electricity, health care, cellular phone service, debit-card transactions, or those sold with loyalty discounts, the price of the next unit of service depends on past usage. As a result, consumers who are inattentive to their past usage but are aware of contract terms may remain uncertain about the price of the next unit. I develop a model of inattentive consumption, derive equilibrium pricing when consumers are inattentive, and evaluate bill-shock regulation requiring firms to disclose information that substitutes for attention. When inattentive consumers are sophisticated but heterogeneous in their expected demand, bill-shock regulation reduces social welfare in fairly-competitive markets, which may be the effect of the Federal Communication Commission's recent bill-shock agreement. If some consumers are attentive while others naively fail to anticipate their own inattention, however, then bill-shock regulation increases social welfare and can benefit consumers. Hence, requiring zero-balance alerts in addition to the Federal Reserve's new opt-in rule for debit-card overdraft protection may benefit consumers.

In short supply: Short-sellers and stock returns

Journal of Accounting and Economics 2015 60(2-3), 33-57
We examine the economic determinants of short-sale supply, and its consequences for future stock returns. Lendable supply increases with expected borrowing costs and decreases with financial statement constructs that indicate overvaluation. Although rising loan fees help ease supply constraints, we find shares are still least available when they are most attractive to short sellers. Using a number of firm characteristics, we derive useful instruments for real-time loan supply and demand conditions in the lending market. Further, we show that (1) when lendable supply is binding (non-binding), short-sale supply (demand) is the main predictor of future stock returns, (2) abnormal returns to the short-side of nine well-known market anomalies are attributable solely to “special” stocks, and (3) loan fees significantly reduce the profitability of the short side and several of these anomalies cease to be profitable. Overall our evidence highlights the central role played by the supply of lendable shares in equity price formation and returns prediction.

Optimal Sales Contracts with Withdrawal Rights

Review of Economic Studies 2015 82(2), 762-790
We introduce ex post participation constraints in the standard sequential screening model. This captures the presence of consumer withdrawal rights as, for instance, mandated by European Union regulation of “distance sales contracts”. With such additional constraints, the optimal contract is static and, unlike with only ex ante participation constraints, does not elicit the agent's information sequentially. This holds whenever differences in ex ante and ex post outside options are below a positive upper bound. Welfare effects of mandatory withdrawal rights are ambiguous. Since it is insufficient in our setting to consider only local incentive constraints, we develop a novel technique to identify the relevant global constraints.

Trust, happiness, and households’ financial decisions

Journal of Financial Stability 2015 20, 82-92
A recent line of research highlights trust as an important element guiding the decision of households to invest into risky financial assets and insurance products. This paper contributes to this literature by identifying happiness as another key driver of the same decision. Using detailed survey data from a sample of Dutch households, we show that the impact of happiness on households’ financial decisions works in the opposite direction and is more economically important compared to trust. Specifically, happiness leads to a lower probability of investing into risky financial assets and having insurance, while trust has the usual positive effect found in the literature. Furthermore, the negative effect of happiness on the ownership of risky financial assets is about 6% higher compared to the positive equivalent of trust. Similarly, the negative effect of happiness on the ownership of insurance is 3% higher than the positive effect of trust.