Developers, Herding, and Overbuilding

Recent years have seen the most pronounced turbulence that real estate markets have ever experienced. There have been wild swings in prices, a wave of foreclosures, countless failed investments, and massive overbuilding. This paper will be primarily concerned with overbuilding. Of the many forces that may have combined to produce this situation, the paper will focus on rational overbuilding carried out by developers whose decisions are made under uncertainty. We will establish the possibility of both statistical and reputation-based herding. The former refers to developers learning from each other, and so tending to copy. The latter refers to developers copying each other in order to reduce the probability of a loss of reputation that can result from making an unconventional choice.     

The fundamental theorem of asset pricing under transaction costs

This paper proves the fundamental theorem of asset pricing with transaction costs, when bid and ask prices follow locally bounded càdlàg (right-continuous, left-limited) processes. The robust no free lunch with vanishing risk condition (RNFLVR) for simple strategies is equivalent to the existence of a strictly consistent price system (SCPS). This result relies on a new notion of admissibility, which reflects future liquidation opportunities. The RNFLVR condition implies that admissible strategies are predictable processes of finite variation. The Appendix develops an extension of the familiar Stieltjes integral for càdlàg integrands and finite-variation integrators, which is central to modelling transaction costs with discontinuous prices.     

The Value of Investment Banking Relationships: Evidence from the Collapse of Lehman Brothers

We examine the long‐standing question of whether firms derive value from investment bank relationships by studying how the Lehman collapse affected industrial firms that received underwriting, advisory, analyst, and market‐making services from Lehman. Equity underwriting clients experienced an abnormal return of around ?5%, on average, in the 7 days surrounding Lehman's bankruptcy, amounting to $23 billion in aggregate risk‐adjusted losses. Losses were especially severe for companies that had stronger and broader security underwriting relationships with Lehman or were smaller, younger, and more financially constrained. Other client groups were not adversely affected.     

Measuring competition in spatial retail

We propose and estimate a spatially aggregated discrete-choice model with overlapping consumer choice sets and demographic-driven heterogeneity that varies by chain. Our approach avoids the need to define markets ex ante and captures rich substitution patterns, even in the absence of price data. An application to the US grocery industry illustrates the importance of location, format, and the spatial distribution of consumers in shaping the competitive environment. Contrary to conventional wisdom, we find substantial cross-format competition between supercenters, clubs, and traditional grocers. Finally, we evaluate two representative mergers between supermarket chains to demonstrate how our estimates inform antitrust policy.     

The Employment Effects of Faster Payment: Evidence from the Federal Quickpay Reform

We study the impact of Quickpay, a reform that permanently accelerated payments to small business contractors of the U.S. government. We find a strong direct effect of the reform on employment growth at the firm level. However, we document substantial crowding out of nontreated firms' employment within local labor markets. While the overall net employment effect is positive, it is close to zero in tight labor markets. Our results highlight an important channel for alleviating financing constraints in small firms, but emphasize the general-equilibrium effects of large-scale interventions, which can lead to lower aggregate outcomes depending on labor market conditions.     

A splitting strategy for the calibration of jump-diffusion models

Finance and Stochastics - We present a detailed analysis and implementation of a splitting strategy to identify simultaneously the local volatility surface and the jump-size distribution from...     

Disability Risk Management and Postinjury Employment of Workers With Back Pain

We analyze the outcomes of occupational back pain among four large employers that use one or more of the following disability management practices: aggressive return to work, claims management, medical management, or time‐limited job accommodations. Outcomes measured at 6 and 12 months postonset include: duration of initial work absence and the probability of returning to stable employment. Employment outcomes are better in firms with more proactive return‐to‐work policies than in firms with more restrictive policies. We devise a statistical test for attrition bias and conclude that sample attrition does not significantly alter our results.     

Currency returns, market regimes and behavioral biases

Covered interest rate parity assumes that there is no risk premium on the hedged returns on currencies. However, empirical evidence indicates that risk premiums are not identically zero, and this is referred to as the forward premium puzzle. We show that there exist market regimes, within which behavioral biases affect decisions, and a type of parity holds within regimes. The foreign exchange market switches between regimes where there is a premium. This paper presents various tests for the hypotheses of currency regimes and regime dependent risk premiums. Based on the existence of regimes, a diversified currency portfolio is created with a mean-variance criterion. Using the Federal Exchange Rate Index as a proxy for the currency benchmark and the U.S. T-Bill as the risk free asset, the similarity between the benchmarks and the implied equilibrium hedged and unhedged portfolios provides evidence for regimes and decision bias. Within each regime interest rate parity is appropriate for modeling currency returns.     

What Determined the Great Cap Rate Compression of 2000–2007, and the Dramatic Reversal During the 2008–2009 Financial Crisis?

In this paper we revisit the many studies that have attempted to explain the determinants of commercial real estate capitalization rates. We introduce two new innovations. First we are able to incorporate two macroeconomic factors that greatly impact cap rates besides treasury rates and local market fundamentals – the variables most commonly used in such research. These are the general corporate risk premium operating in the economy, and the growth rate of debt relative to GDP in the general economy (liquidity). The addition of these factors greatly adds to the ability of previous models to explain the secular fall of cap rates in the last decade and their recent rise – in terms of traditional measures of within-sample fit. Our second innovation is methodological; our analysis uses a large and robust quarterly panel data set of over 30 US metropolitan areas from 1980q1 through 2009q3. With this data we compare 3 models: a “base model” and then one that selectively adds each of our macro-economic variables. We test the ability of each of these models to fit the 2002–2009 period using “back test” dynamic forecasts. Our conclusion is that much of the secular decline in cap rates from 2000 through 2007 and their subsequent rise seem attributable to the macro-economic factors and less to movements in market fundamentals.