After the Flood: How the Great Recession Changed Economic Thought
By Edward L. Glaeser, Tano Santos and E. Glen Weyl
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About this ebook
A momentous collection of the best recent scholarship, After the Flood illustrates both the scope of the crises’ impact on our understanding of global financial markets and the innovative processes whereby scholars have adapted their research to gain a greater understanding of them. Among the contributors are José Scheinkman and Lars Peter Hansen, who bring up to date decades of collaborative research on the mechanisms that tie financial markets to the broader economy; Patrick Bolton, who argues that limiting bankers’ pay may be more effective than limiting the activities they can undertake; Edward Glaeser and Bruce Sacerdote, who study the social dynamics of markets; and E. Glen Weyl, who argues that economists are influenced by the incentives their consulting opportunities create.
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After the Flood - Edward L. Glaeser
Index
CHAPTER ONE
Introduction
Edward L. Glaeser, Tano Santos, and E. Glen Weyl
The past three decades have been characterized by phenomenal upheavals in financial markets: the United States has witnessed two remarkable cycles both in the stock market during the late 1990s and in real estate during the first decade of the 21st century, followed by the Great Recession, the Japanese banking crisis that itself followed two equally impressive cycles in that country’s stock and real estate markets, the larger Asian crisis of 1997, and the Eurozone banking crisis that still is ongoing at the time of this writing. These crises have occurred not in politically unstable countries without sound governance institutions and stable contractual environments, but at the heart of the developed world: the United States, Japan, and the Eurozone. The fact that all these events have led to a flurry of books, papers, journal special issues, and so on exploring the causes of, consequences of, and remedies for large systemic financial crises, which some had thought a thing of the past, is therefore not surprising. What are the origins of these speculative cycles? Are modern financial systems inherently prone to bubbles and instabilities? What are the effects on the real economy?
This volume follows in this tradition but takes a distinct perspective. The chapters in this book consist of papers presented at a conference held at the Columbia Business School in the spring of 2013 in honor of José Scheinkman’s 65th birthday. These papers are centered on the lessons learned from the recent financial crisis, issues that have been high in José’s agenda for some time now. They are all written by José’s coauthors and former students during his remarkable and ongoing career as an economist. José’s contributions span many different fields in economics, from growth to finance and pretty much everything in between. In this volume, we sought to use this diversity to bring new ideas to bear on the events of the past three decades. In doing so, we recruited José’s closest colleagues from a variety of fields to speak to his most recent interests, in financial economics, which he has pursued for the past decade and a half.
We begin this introduction by focusing on the core financial contributions contained in the volume and gradually connect the papers outward from there, returning in our discussion of the final chapter to the core themes we take away from this collection.
1 Asset Pricing
Asset pricing not only lies at the core of finance, but also the core of José’s intellectual interests. His first contribution to the field is an unpublished manuscript from 1977, Notes on Asset Pricing. Starting this volume with the contribution that fits squarely in this field is therefore only appropriate.
The law of one price implies prices can always be expressed as the inner product of the asset’s payoff and another payoff that we term the stochastic discount factor.¹ The stochastic discount factor is of interest to economists because, in the context of general equilibrium models, it encodes information about investors’ intertemporal preferences as well as their attitudes toward risk. Information about these preferences is important because, for example, they determine the benefits of additional business-cycle smoothing through economic policy. A long literature in macroeconomics and finance derives specific models for the stochastic discount factors from first principles and tests the asset-pricing implications of these models. Since Hansen and Singleton’s (1982) seminal paper that rejected the canonical consumption-based model, we have learned much about what is required from models that purport to explain asset prices. But our current models, such as those based on habits or long-run risks, have difficulty explaining the kind of cycles described in the opening lines of this introduction. Still, we have sound reasons to believe elements of those models have to eventually be part of true
stochastic discount factor, because not even the most devoted behavioral finance researcher believes asset prices are completely delinked from macroeconomic magnitudes at all frequencies.
In sum, our current models for the stochastic discount factors are misspecified. Lars Hansen and José himself contribute the most recent product of their remarkable collaboration with a paper that explores a powerful representation of the stochastic discount factors, one outside standard parametric specifications. By a felicitous coincidence, Lars received the 2013 Nobel Prize, together with Eugene Fama and Robert Shiller, partially for his work on asset pricing. The inclusion of his work in this volume is thus doubly warranted.
In their paper, José and Lars explore the possibility that some components of that representation may be errors arising from an imperfectly specified model that may provide an accurate description of risk-return trade-offs at some frequencies but not others. This decomposition is important, because it will allow the econometrician to focus on particular frequencies of interest, say, business-cycle frequencies, while properly taking into account that the model may not be able to accommodate high-frequency events, such as fast-moving financial crises or even short-term deviations of prices from their fundamental values. This flexible representation of the stochastic discount factor thus captures our partial knowledge regarding its proper parameterization while maintaining our ability to conduct econometric analysis.²
In addition, this approach opens the way for further specialization in the field of asset pricing. Some financial economists may focus on those components of the stochastic discount factor with strong mean-reverting components and explore interpretations of these components as liquidity and credit events or periods of missvaluation, for example. Others may focus on those business-cycle frequencies to uncover fundamental preference parameters that should be key in guiding the construction of macroeconomic models geared toward policy evaluation. What arises from the type of representations José and Lars advance in their work is a modular vision of asset pricing—one that emphasizes different economic forces determining risk-return trade-offs at different frequencies.
2 Financial Intermediation
Although the asset-pricing approach of this paper by José and Lars largely abstracts away from financial intermediation and financial institutions, José’s research has always attended to the importance of financial institutions. The crises mentioned at the beginning of this introduction all feature financial intermediaries, such as banks, investment banks, or insurance companies, in starring roles. These entities hold vast portfolios of securities. Conflicts of interest within these intermediaries may affect their portfolio decisions and potentially, prices. The study of these agency problems, and of the compensation schemes designed to address them, may then be a critical component in our understanding of these crises. Many commentators have in fact placed the speculative activities of these large financial institutions (including AIG Financial Products and Lehman Brothers) at the center of the crisis and have argued that financial deregulation is to blame for these institutions drifting away from their traditional activities. This volume includes three papers specifically concerned with the issue of banking and what banks did before and during the present crisis.
Patrick Bolton’s paper takes issue with the view that restricting what bankers can do is the appropriate regulatory response and instead places compensation inside banks at the heart of the current crisis. In particular, he emphasizes that compensation schemes typically focused on the wrong performance benchmarks, rewarding short-term revenue maximization at the expense of longer-term objectives. Bolton et al. (2006) show how, indeed, privately optimal compensation contracts may overweight (from a social perspective) short-term stock performance as an incentive to encourage managers to take risky actions that increase the speculative components of the stock price. Compensation issues and speculation thus go hand in hand and may offer clues as to why prices deviate from fundamentals. Patrick’s paper argues the problem thus is not the broad bundling of tasks inside these new large financial institutions, but rather the adoption of compensation practices that encouraged inefficient risk-taking behavior precisely to induce speculation.³
Bolton argues that a significant upside exists to providing clients with a wide range of financial services. Banks acquire information about their clients, and by pursuing many activities, they further expand their expertise. Restricting bankers’ activities, in Bolton’s view, would reduce the quality of services their clients receive and would hinder the ability of banks to direct resources efficiently throughout the real economy.
One standard argument is that the advantages of providing multiple services must be weighed against the potential conflict of interest that occurs if commercial banks attempt to raise money for firms in equity or bond markets in order to enable them to pay back existing loans. Bolton cites the Drucker and Puri (2007, 210) survey, noting that securities issued by universal banks, who have a lending relationship with the issuer have lower yields (or less underpricing) and also lower fees.
If these conflicted
relationships were producing particularly risky loans, buttressed by the banks’ reputations, fees and yields would presumably be higher, not lower.
Bolton also notes the banks that experienced the most difficulty during the downturn were not universal banks, but rather banks that specialized in investment banking, such as Bear Stearns and Lehman Brothers, or residential mortgages, such as New Century. Moreover, the troubles universal banks, such as Bank of America or JP Morgan Chase, experienced were often associated with their acquisitions of more specialized entities, such as Merrill Lynch, Bear Sterns, Countrywide, and Washington Mutual.
These empirical facts suggest to Bolton that restricting the range of banking services is unlikely to produce more good bankers.
Instead, he advocates better regulation of bankers’ compensation. If banks reward their employees for taking on highly risky activities with large upside bonuses and limited downside punishment, those employees will push the bank to take on too much risk. Some studies, including Cheng et al. (2015), find those banks that provided the strongest incentives fared the worst during the crisis. Given the implicit insurance that governments provide to banks that are deemed too big to fail,
this risk-taking is likely to generally inflict larger social costs. In some cases, excess risk-taking by employees may not even be in the interests of the banks’ own shareholders.
Bolton considers a number of possible schemes to regulate bankers’ compensation, although he accepts that gaming almost any conceivable regulation will be possible. Attempts to ban bonuses altogether or to limit bankers’ pay to some multiple of the lowest-paid employee at the bank seem like crude approaches. Surely, many bonuses deliver social value by inducing higher levels of effort. Restricting pay to a multiple of the least well-paid employee may induce banks to fire their least well-compensated workers and use subcontractors to provide their services.
Bolton finds subtler approaches to be more appealing, such as requiring employees whose compensation is tied to stock price to also pay a penalty when the bank’s own credit default swap spread increases, essentially punishing the bankers for taking on more risk. Bolton also suggests changing corporate governance in ways that enhance the powers of the chief risk officer might be beneficial. Although outside regulators cannot perfectly enforce a new culture of more limited incentives, Bolton sees more upside in incentive reforms than he does is restricting the range of banking activities.
Albert Kyle’s paper concerns a second tool for reducing the externalities from bank default—increased capital requirements. Regulations, especially those associated with the Basel Accords, have often required banks to hold minimum levels of risk-adjusted equity, which reduces the chances that a market fall will lead to a bank default, because the drop wipes out the value of equity before it reduces the value of more senior debt. In the wake of the crash, many economists have called for increasing the minimum capital requirements, perhaps from 8% to 20%.
Kyle’s essay takes a somewhat stronger line than Bolton’s—and one stronger than our instincts—by arguing that the primary externality stems from the government’s inability to commit to refrain from bailing out insolvent banks. We have taken a more agnostic approach, arguing bank insolvency may create social costs whether or not the public sector bails them out. Moreover, whether the social costs come from failures or bailouts, a good case remains for regulatory actions that decrease the probability of bank failure, such as increased capital requirements.
Yet Kyle’s remedy does not depend sensitively on the precise reasons for attempting to limit risk. Kyle supports those who want to raise equity requirements but favors a somewhat novel manner of increasing capital stability. Instead of merely issuing more equity, his proposal calls for an increase in the level of contingent capital, which represents debt that is converted into equity in the event of a crisis. This contingent capital offers the same capital cushion (20%) to protect debtholders and the public that an increase in equity capital creates, but Kyle’s proposal creates stronger incentives, especially if the owners of contingent capital have difficulty colluding with the owners of equity.
Kyle echoes Kashyap et al. (2008), who argue that an excess of equity may insulate management from market pressures. Because abundant equity makes default less likely, bondholders are less likely to take steps to protect their investment from default. In principle, equity holders can monitor themselves, but in many historical examples, management appears to have subverted boards. Moreover, the equity holders also benefit from certain types of risk taking, because bondholders and the government bear the extreme downside risk. This fact makes equity holders poorly equipped to provide a strong counterweight to activities with large downside risks.
Therefore, like Kashyap et al. (2008), Kyle argues for contingent capital that increases only during downturns, but the structure of Kyle’s proposal is radically different. Kashyap et al. (2008) suggest capital insurance, in which banks would pay a fee to an insurer who would provide extra capital in the event of a downturn. Kyle proposes the bank issue reverse preferred stock that naturally converts itself into equity in the event of a bust. Although the capital insurance structure has an attractive simplicity, Kyle’s proposal also has advantages. Most notably, it eliminates the incentive to regulate the insurer, because bank insurers seem likely to pose significant downside risk themselves in the event of a market crash. Moreover, he argues that widespread owners of the preferred stock instruments seem likely to be better positioned than a single insurer to advocate for their interests. Obviously, this claim depends on the details of the political economy, because in some cases, more concentrated interests have greater influence, but his observation about the political implications of asset structures is provocative and interesting.
In its simplest formulation, banks would have a 20% capital cushion, but 10% of that cushion would come from equity and 10% would come from convertible preferred stock. During good times, the preferred stock would be treated like standard debt. During a conversion event, which would be declared by a regulator, banks would have the option of either converting the preferred stock to equity or buying back the preferred stock at par, using funds received from a recent issue of equity. Conversion events would have multiple possible triggers, including those created by external market events, such as a rapid decrease in the value of equity, or regulatory events, such as a low estimated value of the bank’s capital.
In the event of a conversion, the preferred stock would become equity, and $1 of preferred stock, at par, would become $4 of equity. If the original capital structure were 10% equity and 10% preferred stock, then, after a complete conversion, the former owners of the preferred stock would hold 80% of the equity. In this way, the bank would suddenly get an infusion of capital without the difficulties of having to raise new equity in the middle of a crisis.
This contingent-capital plan creates pre-crisis incentives through two mechanisms. First, because the holders of the contingent capital would have an incentive to avoid conversion, they would push to reduce the bank’s exposure to downside risks. This push could take the form of lobbying or lawsuits. Second, the bank would have incentives to avoid a conversion event that would highly dilute the value of the shares held by its equity owners. Raising equity before the crisis would be one way to avoid a conversion event.
Although Kyle recognizes that no capital requirement is without costs, contingent capital, like capital insurance, creates the possibility of a mechanism that automatically increases banks’ capital during a downturn without the downsides of issuing too much equity. Extra equity carries capital costs for the bank and may reduce some attractive incentives to avoid default. The plan provides a relatively flexible means of making banks less vulnerable to extreme downside risk.
The paper by Aloisio Araujo, Rafael Ferreira, and Bruno Funchal concerns the regulation of collateral and bankruptcy. The paper is applied to the Brazilian economy, but its insights are also relevant to the United States and the optimal design of a bankruptcy code in general. These authors work in the class of general equilibrium with incomplete markets and default that José has also exploited in some of his work. Specifically, whereas Araujo, Ferreira, and Funchal are concerned with regulatory issues, Santos and Scheinkman (2001) focus on the level of collateral that one should expect in competitive security-design environments, such as over-the-counter markets.
In the wake of the foreclosure crisis, a widespread call went out for foreclosure moratoria that many states adopted. A foreclosure moratorium essentially reduces the ability of housing to serve as collateral for loans. Economists have typically argued that reducing the ability to pledge housing will effectively reduce the supply of lending. Araujo, Ferreira, and Funchal suggest the situation is more complicated than the simplest economics would suggest.
If no extra costs were associated with foreclosing or imposing other harsh penalties on delinquent borrowers, the conventional pro-creditor logic of economics would be correct. By ensuring lenders can extract collateral quickly, lenders will more aggressively advance resources to borrowers. The ultimate beneficiary of strong collateral laws may end up being the borrowers who can access capital at a lower rate than if lenders were uncertain about their ability to collect.
This logic holds outside the realm of home mortgages and includes general consumer loans or even corporate debt. As creditor rights become stronger, creditors will be more willing to lend. Borrowers will obtain loans more easily, and interest rates will be lower.
But this rosy picture of creditor rights becomes muddied when protecting creditor rights leads to social costs. For example, if a homeowner values a house considerably more than any alternative owner, reallocating a foreclosed home destroys social value. If companies are destroyed inefficiently to allocate assets to creditors, or if consumer debt defaults lead to an inability to work, pro-creditor policies may be counterproductive.
Dobbie and Song (2015) examine the impact of consumers receiving Chapter 13 protection, which protects more assets than the more draconian Chapter 7 bankruptcy. Dobbie and Song use the random assignment of bankruptcy judges as a natural experiment, and find an individual who receives Chapter 13 protection increases annual earnings in the first five post-filing years by $5,012, increases employment over the same time period by 3.5 percentage points, and decreases five-year mortality by 1.9 percentage points. These results suggest that a substantial trade-off exists between providing lenders with better ex ante protection and reducing ex post social costs.
This trade-off is the focus of the paper by Araujo, Ferreira, and Funchal. This essay first reviews the work of Araujo et al. (2012) on consumer lending with collateral. Regulating collateral cannot lead to a Pareto improvement, but it can sometimes lead to reallocations of welfare across agents. Somewhat surprisingly, restrictions on subprime lending are particularly harmful, because the gains from trade are the highest for the borrowers with the least collateral. This result would be weakened if default for subprime borrowers were more socially costly, but these authors’ basic conclusion does stand as a warning to those who are most enthusiastic about restricting subprime borrowing.
Their paper also reviews the results of Araujo and Funchal (2015) on corporate bankruptcy. In this case, pro-creditor policies essentially ease banks’ ability to seize physical assets in the event of a default. The cost of taking those assets is that the productive viability of the firm is destroyed. Because a trade-off exists, their results typically suggest an intermediate level of creditor rights that trades the benefit of attracting creditor supply with the benefit of reducing ex post damage. Credit demand also falls when defaults lead to quick liquidation.
They find the optimal strength of creditor rights depends on the nature of the production process. When output is primarily dependent on alienable physical assets, the costs of liquidating the firm are small, and creditor rights should be strong. When output is primarily dependent on nonseizable assets that complement the physical goods, liquidations costs are high and optimal creditor rights are somewhat weaker.
The last theoretical section of their paper turns to personal bankruptcy rules. These rules seem particularly relevant to the mortgage crisis, because some authors have argued that increased stringency of personal bankruptcy rules enacted in 2005 subsequently led to more mortgage defaults. In this case, the impact of a change in rules might be quite different on the current stock of debtors, who would obviously have fewer resources to repay their mortgage debt if bankruptcy protection were reduced, and on any potential future stock of debtors, who might have to pay lower interest rates if bankruptcy options were reduced.
In their structure, enhancing creditor rights during bankruptcy reduces the incentives to invest in a second asset that would be taken in the event of a default. Strengthening creditor rights does enhance the supply of credit, but it also decreases the demand for credit, because borrowers risk losing the value that can come from the second asset. As in the case of corporate bankruptcy, the optimal amount of creditor rights lies between extremes, depending on the relative importance of encouraging the investment in the second asset and encouraging lending.
The paper by Araujo, Ferreira, and Funchal ends with a discussion of Brazilian bankruptcy law, which serves as a bridge to the last pair of papers that deal with international aspects of the crisis. The authors note that a strengthening of the bankruptcy procedure led to a significant increase in the total flow of corporate credit in Brazil, suggesting the important impact bankruptcy rules have on credit markets.
3 Global Perspective
Financial institutions and monitoring rules played a crucial role in the euro crisis. This is particularly clear in the case of Spain, as Santos highlights in his contribution. His paper provides a sketch of the history of Spanish finance, cataloguing the periods of crisis and reform that preceded the current downturn. The great banking boom in Spain, before 2007, was particularly dominated by real estate loans, both to homebuyers and real estate developers. A crucial difference between home purchase loans and developer loans is that loans to homeowners were generally securitized, whereas loans to developers were not.
Much has been made of the downsides of securitization in the United States following the crisis. Securitization may have reduced the tendency to fully screen borrowers and introduced difficulties into the renegotiation of loans that have gone into default. However, securitization also has a considerable upside—banks are no longer as vulnerable to the twists of the real estate cycle. Because Spanish banks held an enormous amount of real estate developer debt, they were particularly vulnerable when that sector lurched into crisis.
The Spanish real estate bubble appears to have had its roots in real causes. The Spanish economy was surging prior to 2007, and the country proved to be a particularly attractive locale for immigrants. Sunshine attracted migrants from the United States, and January temperatures were was a strong correlate of the U.S. real estate boom between 1996 and 2006 (Glaeser 2013). Thus, unsurprisingly, within the European Union, Spain was particularly appealing to real estate investors. Moreover, for institutional reasons, Spain has a particularly underdeveloped rental sector, so any demand for real estate was going to directly influence housing prices. Easy credit, created both by expansionist policies by the Bank of Spain and the global credit supply, also supported the boom.
Moreover, one major part of the Spanish banking sector—the cajas (viz., savings and loans)—were particularly poorly governed. These nonprofit, politically run institutions faced little discipline, at least in the short run, and often had relatively inexperienced management that was more interested in expansion than in sound financial management. The cajas, especially the poorly run ones, were especially aggressive in real estate during the boom and were particularly prone to collapse during the bust. Unsurprisingly, a number of significant accounting issues appeared after 2007 when regulators attempted to merge these entities. Indeed, Santos argues the mergers themselves may have contributed to a lack of transparency.
The increase in Spanish real estate values between 2000 and 2007 was enormous, and Spain likely would have experienced a major correction without any influence from the outside world. Still, the unraveling of the subprime market in the United States was the first source of external pressure on Spanish banks. Once again, the integration of global markets enabled downturns to spread.
As banks lurched into crisis, the country proved unable to handle its troubles on its own. Ultimately, Spain had to turn to the EU for support, which provided a 100 billion euro credit line in exchange for strict supervision. Ultimately, Spain’s travails caused it to surrender its independent economic sovereignty. With EU aid, the Spanish banking crisis seems to have turned a corner, but its magnitude serves as a reminder of the ability of real estate crashes to undo an entire economy. As the world contemplates reform, it would do well to remember that the stakes are enormous.
The paper on the Spanish financial crisis emphasizes what happened before the crisis. Indeed, researchers have spilled much ink describing the many twists and turns of banking crises. But much less has been written on the lead-up to the crisis: a lot of research on the flood and on after the flood and less on before the flood. If we are to understand financial crises, we need to better understand the path followed up to the crisis and the different actions taken by the many actors needed to support these long speculative cycles. As mentioned, the Spanish banking crisis is interesting, because a real estate boom like no other accompanied it; supply increased dramatically during the period of real estate appreciation and still was not enough to put a significant dent in this appreciation. Spanish banks originated and distributed huge real estate portfolios, including to foreign banks hungry for exposure to the booming Spanish economy. Spain became the largest securitization market in Europe after the United Kingdom, thereby facilitating the trading of Spanish real estate through both domestic and international portfolios. Therefore, when the crisis hit, many were exposed.
This theme permeates much of José’s recent work on bubbles, which has stressed the importance of understanding prices and trading volumes jointly (see, e.g., Scheinkman and Xiong 2003; Hong et al. 2006; Scheinkman 2014). As José emphasizes in his Arrow Lectures, what distinguishes rational bubbles from the speculative bubbles experienced over the past few years is precisely the fact that in a rational bubble, agents are content to hold the asset because the price appreciation is a compensation for the risk that the bubble may burst at any point in time. Thus, rational bubbles have a hard time accounting for the exaggerated volumes that characterize speculative cycles. In these cycles, assets trade hands: they require finding another agent with different beliefs ready to hold what the selling agent is no longer willing to. In all these stories, restrictions on short-selling are a critical ingredient for sustaining the speculative cycle. Indeed, shorting the Spanish real estate market appears to have been difficult.
Yet the international connections in the financial crisis were not just within regions but also across them. Indeed, nothing illustrates the global integration of financial markets better than the events of the past six years. Financial markets are now global, and financial events in one part of the world have the capacity to shape markets across the globe. Many observers have argued that a global glut of savings, especially due to China, helped increase the price of assets before the booms. The crisis that began in U.S. mortgage markets caused pain elsewhere, and the world may still not have experienced the full implications of the financial problems that plague the Eurozone. To consider these global considerations, the next two papers in the volume focus on U.S.-Asian connection and on the unfolding of the financial crisis in Spain.
The paper by Conghui Hu and Wei Xiong concerns the information role of commodities traded in U.S. markets on subsequent events in Asia. Their basic approach is to look at the correlation between stock price changes in Asia and changes in commodity prices during the previous day in the United States. They are also able to control for changes in overall U.S. stock prices, and their results are typically robust to that control.
The basic finding is a striking sign of the increasing integration of global markets. Prior to 2005, little correlation existed between U.S. commodity prices and subsequent changes in Asian stock prices. After 2005, the correlation rose substantially for copper and soybeans and has stayed relatively flat for crude oil. An increase in Asian imports of copper and soybeans also mirrors the rise, illustrating a general pattern of rising global connectivity that would seem to also increase the capacity of crises to spread from nation to