Working Papers
Stimulating discussion and critical comment on research in progress.
2012
- WP 12-21
- Business Cycles and Financial Crises: The Roles of Credit Supply and Demand Shocks
- This paper explores the hypothesis that the sources of economic and financial crises differ from noncrisis business cycle fluctuations. We employ Markov-switching Bayesian vector autoregressions (MS-BVARs) to gather evidence about the hypothesis on a long annual U.S. sample running from 1890 to 2010. The sample covers several episodes useful for understanding U.S. economic and financial history, which generate variation in the data that aids in identifying credit supply and demand shocks. We identify these shocks within MS-BVARs by tying credit supply and demand movements to inside money and its intertemporal price. The model space is limited to stochastic volatility (SV) in the errors of the MS-BVARs. Of the 15 MS-BVARs estimated, the data favor a MS-BVAR in which economic and financial crises and noncrisis business cycle regimes recur throughout the long annual sample. The best-fitting MS-BVAR also isolates SV regimes in which shocks to inside money dominate aggregate fluctuations. (PDF)
- WP 12-20
- Mortgage Companies and Regulatory Arbitrage
- Mortgage companies (MCs) originated about 60% of all mortgages before the 2007 crisis and continue to hold a 30% market share postcrisis. While financial regulations are strictly enforced for depository institutions (banks), they are weakly enforced for MCs even if they are subsidiaries of a bank holding company (BHC). This study documents that the resulting regulatory arbitrage creates incentives for BHCs to engage in risk shifting through their MC affiliates. We show that MCs are established to circumvent the capital requirements and to shield the parent BHCs from loan-related losses. BHCs run the risky mortgage business through their MC affiliates. As compared to bank affiliates of BHCs, the MC affiliates lent more to individuals with lower credit scores, lower incomes, and higher loan-to-income ratios. MC borrowers experienced higher rates of foreclosure and delinquency during the crisis. Our results imply that the regulation in place had the capacity to prevent the deterioration of lending standards widely blamed for the crisis. The inconsistent enforcement of regulation, though, eroded its effectiveness. Higher involvement of mortgage companies in subprime lending and securitization activity do not explain our results. (PDF)
- WP 12-19
- A Tractable Estimator for General Mixed Multinomial Logit Models
- The mixed logit is a framework for incorporating unobserved heterogeneity in discrete choice models in a general way. These models are difficult to estimate because they result in a complicated incomplete data likelihood. This paper proposes a new approach for estimating mixed logit models. The estimator is easily implemented as iteratively re-weighted least squares: the well known solution for complete data likelihood logits. The main benefit of this approach is that it requires drastically fewer evaluations of the simulated likelihood function, making it signicantly faster than conventional methods that rely on numerically approximating the gradient. The method is rooted in a generalized expectation and maximization (GEM) algorithm, so it is asymptotically consistent, efficient, and globally convergent. (PDF)
- WP 12-18
- The Macroeconomic Forecasting Performance of Autoregressive Models with Alternative Specifications of Time-Varying Volatility
- This paper compares alternative models of time-varying macroeconomic volatility on the basis of the accuracy of point and density forecasts of macroeconomic variables. In this analysis, we consider both Bayesian autoregressive and Bayesian vector autoregressive models that incorporate some form of time-varying volatility, precisely stochastic volatility (both with constant and time-varying autoregressive coefficients), stochastic volatility following a stationary AR process, stochastic volatility coupled with fat tails, GARCH, and mixture-of-innovation models. The comparison is based on the accuracy of forecasts of key macroeconomic time series for real-time post?War-II data both for the United States and United Kingdom. The results show that the AR and VAR specifications with widely used stochastic volatility dominate models with alternative volatility specifications, in terms of point forecasting to some degree and density forecasting to a greater degree. (PDF)
- WP 12-17
- Trimmed-Mean Inflation Statistics: Just Hit the One in the Middle
- This paper reinvestigates the performance of trimmed-mean inflation measures some 20 years since their inception, asking whether there is a particular trimmed-mean measure that dominates the median CPI. Unlike previous research, we evaluate the performance of symmetric and asymmetric trimmed-means using a well-known equality of prediction test. We find that there is a large swath of trimmed-means that have statistically indistinguishable performance. Also, while the swath of statistically similar trims changes slightly over different sample periods, it always includes the median CPI--an extreme trim that holds conceptual and computational advantages. We conclude with a simple forecasting exercise that highlights the advantage of the median CPI relative to other standard inflation measures. (PDF)
- WP 11-22R
- Assessing the Evidence on Neighborhood Effects from Moving to Opportunity
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This paper investigates the assumptions under which various parameters can be identified by the Moving to Opportunity (MTO) housing mobility experiment. Joint models of potential outcomes and selection into treatment are used to clarify the current interpretation of empirical evidence, distinguishing program effects from neighborhood effects. It is shown that MTO only identifies a restricted subset of the neighborhood effects of interest, with empirical evidence presented that MTO does not identify effects from moving to high quality neighborhoods. One implication is that programs designed around measures other than poverty might have larger effects than MTO.[This paper has been substantially revised from previous versions. Previous versions: February 2012 (PDF) | September 2011 (PDF) | January 2011 (PDF)]. Current version:
(PDF) - Wp 12-16
- Estimating Contract Indexation in a Financial Accelerator Model
- This paper addresses the positive implications of indexing risky debt to observable aggregate conditions. These issues are pursued within the context of the celebrated financial accelerator model of Bernanke, Gertler, and Gilchrist (1999). The principal conclusions include: (1) the estimated level of indexation is significant, (2) the business cycle properties of the model are significantly affected by this degree of indexation. (PDF)
- WP 12-15
- Fiscal Multipliers under an Interest Rate Peg of Deterministic vs. Stochastic Duration
- This paper revisits the size of the fiscal multiplier. The experiment is a fiscal expansion under the assumption of a pegged nominal rate of interest. We demonstrate that a quantitatively important issue is the articulation of the exit from the policy experiment. If the monetary-fiscal expansion is stochastic with a mean duration of T periods, the fiscal multiplier can be unboundedly large. However, if the monetary-fiscal expansion is for a fixed T periods, the multiplier is much smaller. (PDF)
- WP 12-14
- Deep Recessions, Fast Recoveries, and Financial Crises: Evidence from the American Record
- Do steep recoveries follow deep recessions? Does it matter if a credit crunch or banking panic accompanies the recession? Moreover, does it matter if the recession is associated with a housing bust? We look at the American historical experience in an attempt to answer these questions. The answers depend on the definition of a financial crisis and on how much of the recovery is considered. But in general recessions associated with financial crises are generally followed by rapid recoveries. We find three exceptions to this pattern: the recovery from the Great Contraction in the 1930s; the recovery after the recession of the early 1990s and the present recovery. The present recovery is strikingly more tepid than the 1990s. One factor we consider that may explain some of the slowness of this recovery is the moribund nature of residential investment, a variable that is usually a key predictor of recessions and recoveries. (PDF)
- WP 12-13
- The Relationship between City Center Density and Urban Growth or Decline
- In this paper we contrast the spatial patterns of population density and other demographic changes in growing versus shrinking MSAs from 1980 to 2010. We find that, on average, shrinking MSAs show the steepest drop in population density near the Central Business District (CBD). Motivated by this fact, we explore the connection between changes in population density at the core of the MSA and MSA productivity. We find that changes in near-CBD population density are positively associated with per capita income growth at the MSA-level. (PDF)
- WP 12-12
- Neighborhood Dynamics and the Distribution of Opportunity
- This paper uses an overlapping-generations dynamic general equilibrium model of residential sorting and intergenerational human capital accumulation to investigate effects of neighborhood externalities. In the model, households choose where to live and how much to invest toward the production of their child’s human capital. The return on the parent’s investment is determined in part by the child’s ability and in part by an externality from the average human capital in their neighborhood. We use the model to test a prominent hypothesis about the concentration of poverty within racially-segregated neighborhoods (Wilson 1987). We first impose segregation on a model with two neighborhoods and match the model steady state to income and housing data from Chicago in 1960. Next, we lift the restriction on moving and compute the new steady state and corresponding transition path. The transition implied by the model qualitatively supports Wilson’s hypothesis: high-income residents of the low-average-human-capital neighborhood move out, reducing the returns to investment in their old neighborhood. Sorting increases citywide human capital, but it also produces congestion in the high-income neighborhood, increasing the average cost of housing. As a result, average welfare decreases by 2.2 percent of steady state consumption, and the loss is greatest for those initially in the low-income neighborhood. (PDF)
- WP 12-11
- Diagnosing Labor Market Search Models: A Multiple-Shock Approach
- We construct a multiple shock, discrete time version of the Mortensen-Pissarides labor market search model to investigate the basic model’s well-known tendency to underpredict the volatility of key labor market variables. In addition to the standard labor productivity shock, we introduce shocks to matching efficiency and job separation. We conduct two set of experiments. First, we estimate the joint probability distribution of shocks that simultaneously satisfy the observed data and the first-order conditions of the multiple-shock model, and then simulate its properties. Although the multiple-shock model generates significantly more volatility while preserving the Beveridge curve relationship, it generates counterfactual implications for the cyclicality of job separations. Using a business cycle accounting approach, we design the second set of experiments to isolate the sources of model incompleteness and show that the model requires significant procyclical and volatile matching efficiency and counterfactually procyclical job separations to render the observed data without error. We conjecture that the basic Mortensen-Pissarides model lacks mechanisms to generate sufficiently strong labor market reallocation over the business cycle, and suggest nontrivial labor force participation and job-to-job transitions as promising avenues of research. NOTE: This is a substantial revision of working paper 08-13, which is a substantial revision of working paper 07-20. (PDF)
- WP 12-10
- Approximating High-Dimensional Dynamic Models: Sieve Value Function Iteration
- Many dynamic problems in economics are characterized by large state spaces, which make both computing and estimating the model infeasible. We introduce a method for approximating the value function of high-dimensional dynamic models based on sieves and establish results for the: (a) consistency, (b) rates of convergence, and (c) bounds on the error of approximation. We embed this method for approximating the solution to the dynamic problem within an estimation routine and prove that it provides consistent estimates of the model’s parameters. We provide Monte Carlo evidence that our method can successfully be used to approximate models that would otherwise be infeasible to compute, suggesting that these techniques may substantially broaden the class of models that can be solved and estimated. (PDF)
- WP 12-09
- Bank Balance Sheet Dynamics under a Regulatory Liquidity-Coverage-Ratio Constraint
- This paper presents a dynamic model of a bank’s optimal choices of imposing a binding liquidity-coverage-ratio (LCR) constraint. Our baseline balance-sheet dynamics starts with portfolio separation and no LCR constraint. Under a scenario in which regulators prohibit banks from applying securities to fulfill the LCR constraint, portfolio separation continues to hold, but deposit holdings depend on the extent to which the LCR constraint is binding. When banks are allowed to apply securities toward satisfying the constraint, portfolio separation can break down and lead to ambiguous effects on optimal dynamic loan and deposit paths. Our results indicate that under special cases in which portfolio separation holds, the LCR constraint affects bank-sheet dynamics in ways not previously recognized. As regulators move forward in implementing Basel III style LCR, it is imperative to understand the effects of the LCR constraint on bank balance-sheet dynamics. (PDF)
- WP 12-08R
- Marginal Neighborhood Effects from Moving to Opportunity
- This paper estimates Marginal Treatment Effects (MTEs) of neighborhood quality from the Moving to Opportunity (MTO) housing mobility experiment in a model with multiple treatment levels. We propose and implement a new identification strategy that exploits the identification of the idiosyncratic component of an ordered choice model. Due to the limited changes in neighborhood quality induced by MTO, we only estimate MTEs of moving from the first to second decile of the national distribution of neighborhood quality. These MTEs are heterogeneous over observable characteristics: Labor market outcomes were affected most positively for individuals at the sites in which larger changes in neighborhood quality were induced by MTO. Estimated MTEs are also heterogeneous over unobservables, which we consider evidence in favor of selection occurring in a model with essential heterogeneity. Although there is not enough structure in our model to clearly interpret MTE heterogeneity, we discuss possible reasons for the surprising result that effects are best for those with characteristics that make them less likely to move without the program. (PDF)
- WP 12-07
- Epilogue: Foreign-Exchange-Market Operations in the Twenty-First Century
- Foreign-exchange operations did not end after the United States stopped its activist approach to intervention. Japan persisted in such operations, but avoided overt conflict with its monetary policy. With the onset of the Great Recession, Switzerland has transacted in foreign exchange both for monetary and exchange-rate purposes, and key central banks have used swap facilities to extended their lender-of-last-resort functions. Developing and emerging-market economies continue to intervene, but their actions may hamper the development of their own foreign-exchange markets. China’s undervalued exchange rate is producing inflation and real appreciation, despite China’s efforts to sterilize its reserve accumulation. (PDF)
- WP 12-06
- Common Drifting Volatility in Large Bayesian VARs
- The estimation of large vector autoregressions with stochastic volatility using standard methods is computationally very demanding. In this paper we propose to model conditional volatilities as driven by a single common unobserved factor. This is justified by the observation that the pattern of estimated volatilities in empirical analyses is often very similar across variables. Using a combination of a standard natural conjugate prior for the VAR coefficients and an independent prior on a common stochastic volatility factor, we derive the posterior densities for the parameters of the resulting BVAR with common stochastic volatility (BVAR-CSV). Under the chosen prior, the conditional posterior of the VAR coefficients features a Kroneker structure that allows for fast estimation, even in a large system. Using US and UK data, we show that, compared to a model with constant volatilities, our proposed common volatility model significantly improves model fit and forecast accuracy. The gains are comparable to or as great as the gains achieved with a conventional stochastic volatility specification that allows independent volatility processes for each variable. But our common volatility specification greatly speeds computations. (PDF)
- WP 12-05
- Within-city Variation in Urban Decline: The Case of Detroit
- When a city experiences a decline in income or population, do all neighborhoods within the city decline equally? Or do some neighborhoods decline more than others? What are the characteristics of the neighborhoods that decline the most? We answer these questions by looking at what happened to neighborhoods within Detroit as the city experienced a sharp decline in income and population from the 1980s to the late 2000s. We find patterns of changes in income and population that are consistent with the model and empirical patterns of gentrification presented in Guerrieri, Hartley, and Hurst (2011), only playing out in reverse. (Data description) (PDF)
- WP 12-04
- Privately Optimal Contracts and Suboptimal Outcomes in a Model of Agency Costs
- This paper derives the privately optimal lending contract in the celebrated financial accelerator model of Bernanke, Gertler and Gilchrist (1999). The privately optimal contract includes indexation to the aggregate return on capital and household consumption. Although privately optimal, this contract is not welfare maximizing as it exacerbates fluctuations in real activity. The household’s desire to hedge business cycle risk, leads, via the financial contract, to greater business cycle risk. The welfare cost of the privately optimal contract (when compared to the planner outcome) is quite large. A countercyclical tax on lender profits comes close to achieving the planner outcome. (PDF)
- WP12-03
- The Impact of Recovery Efforts on Residential Vacancies
- Legislation aimed at stabilizing housing markets since the recession has focused on providing funding to acquire and remediate foreclosed and abandoned homes or providing financial assistance and incentives to purchase homes. Cuyahoga County has received over $100 million in such funds since 2008. We investigate the impact of these funds on vacancy rates. We examine neighborhoods in Cuyahoga County where National Stabilization Program dollars were spent and find that the program helped reduce vacancies in neighborhoods where properties were primarily purchased for consumption purposes. (PDF)
- WP 12-02
- How Inflationary Is an Extended Period of Low Interest Rates?
- Recent monetary policy experience suggests a simple test of models of monetary non-neutrality. Suppose the central bank pegs the nominal interest rate below steady state for a reasonably short period of time. Familiar intuition suggests that this should be inflationary. But a monetary model should be rejected if a reasonably short nominal rate peg results in an unreasonably large inflation response. We pursue this simple test in three variants of the familiar dynamic new Keynesian (DNK) model. All of these models fail this test. Further some variants of the model produce inflation reversals where an interest rate peg leads to sharp deflations. (PDF)
- WP 12-01
- Community-Based Well Maintenance in Rural Haiti
- The international community has pledged $11 billion to Haiti, a country where nongovernmental organizations (NGOs) provide nearly all public goods and services. This paper addresses two questions about these NGOs: How can they most effectively perform their own work, and how can they integrate their programs into broader efforts organized by public institutions? I evaluate the community-based model of Haiti Outreach (HO), which trains communities to manage wells after they have been constructed. The effect of this training is identified by comparing the outcomes of HO’s wells with a control group of wells that were refurbished by HO but then managed by other groups. Wells managed under the community-based approach are 8.7 percentage points more likely to be functioning after one year. I also propose a social planner’s problem to quantify the tradeoff between equity and efficiency created by user fees that may be applied to many development programs. A social planner indifferent between standard and community-based interventions has strong preferences for sporadically providing water to the poorest members of a community at the expense of sustainably providing water to the majority of community members. Policymakers deciding between alternative interventions should also give consideration to the community-based approach for its ability to build political institutions. (PDF)