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Equilibrium Pricing and Trading Volume under Preference Uncertainty

Review of Economic Studies 2014 81(4), 1401-1437
Information collection and processing in financial institutions is challenging. This can delay the observation by traders of the exact capital charges and constraints of their institution. During this delay, traders face preference uncertainty. In this context, we study optimal trading strategies and equilibrium prices in a continuous centralized market. We focus on liquidity shocks, during which preference uncertainty is likely to matter most. Preference uncertainty generates allocative inefficiency, but need not reduce prices. Progressively learning about preferences generate round–trip trades, which increase volume relative to the frictionless market. In a cross section of liquidity shocks, the initial price drop is positively correlated with total trading volume. Across traders, the number of round–trips is negatively correlated with trading profits and average inventory.

Moral Hazard, Incentive Contracts, and Risk: Evidence from Procurement

Review of Economic Studies 2014 81(3), 1201-1228
Deadlines and late penalties are widely used to incentivize effort. Tighter deadlines and higher penalties induce higher effort, but increase the agent's risk. We model how these contract terms affect the work rate and time-to-completion in a procurement setting, characterizing the efficient contract design. Using new micro-level data on Minnesota highway construction contracts that includes day-by-day information on work plans, hours worked and delays, we find evidence of ex post moral hazard: contractors adjust their effort level during the course of the contract in response to unanticipated productivity shocks, in a way that is consistent with our theoretical predictions. We next build an econometric model that endogenizes the completion time as a function of the contract terms and the productivity shocks, and simulate how commuter welfare and contractor costs vary across different terms and shocks. Accounting for the traffic delays caused by construction, switching to a more efficient contract design would increase welfare by 22.5% of the contract value while increasing the standard deviation of contractor costs—a measure of risk—by less than 1% of the contract value.

Resale and Rent-Seeking: An Application to Ticket Markets

Review of Economic Studies 2014 81(1), 266-300
We estimate an equilibrium model of ticket resale in which consumers ’ and brokers ’ decisions in the primary market reflect rational expectations about the resale market. Estimation is based on a unique dataset that merges transaction details from both the primary and secondary markets for tickets to major rock concerts. In our model, the presence of a resale market permits tickets to be traded from low-value to high-value consumers, but it also stimulates costly efforts by consumers and brokers to obtain underpriced tickets in the primary market. We estimate that observed levels of resale increase allocative efficiency by 5 % on average, but that a third of this increase is offset by increases in costly rent-seeking in the primary market and transaction costs in the resale market.

International Trade and Labour Income Risk in the U.S.

Review of Economic Studies 2014 81(1), 186-218
This article studies empirically the links between international trade and labour income risk faced by manufacturing sector workers in the U.S. We use longitudinal data on workers to estimate time-varying individual income risk at the industry level. We then combine our estimates of persistent labour income risk with measures of exposure to international trade to analyse the relationship between trade and labour income risk. We also study risk estimates from various subsamples of workers, such as those who switched to a different manufacturing industry (or out of the manufacturing sector altogether). Finally, we use these estimates to conduct a welfare analysis evaluating the benefits or costs of trade through the income risk channel. We find import penetration to have a statistically significant association with labour income risk in the U.S. Our welfare calculations suggest that these effects are economically significant.

Demand Reduction and Inefficiency in Multi-Unit Auctions

Review of Economic Studies 2014 81(4), 1366-1400
Auctions often involve the sale of many related goods: Treasury, spectrum, and electricity auctions are examples. In multi-unit auctions, bids for marginal units may affect payments for inframarginal units, giving rise to “demand reduction” and furthermore to incentives for shading bids differently across units. We establish that such differential bid shading results generically in ex post inefficient allocations in the uniform-price and pay-as-bid auctions. We also show that, in general, the efficiency and revenue rankings of the two formats are ambiguous. However, in settings with symmetric bidders, the pay-as-bid auction often outperforms. In particular, with diminishing marginal utility, symmetric information and linearity, it yields greater expected revenues. We explain the rankings through multi-unit effects, which have no counterparts in auctions with unit demands. We attribute the new incentives separately to multi-unit (but constant) marginal utility and to diminishing marginal utility. We also provide comparisons with the Vickrey auction.

Roads and Trade: Evidence from the US

Review of Economic Studies 2014 81(2), 681-724
We estimate the effect of interstate highways on the level and composition of trade for US cities. Highways within cities have a large effect on the weight of city exports with an elasticity of approximately 0.5. We find little effect of highways on the total value of exports. Consistent with this, we find that cities with more highways specialize in sectors producing heavy goods.