Associate Professor of Finance, UCLA Anderson School of Management
Research Director, UCLA Ziman Center for Real Estate
I study how information frictions, incentive problems, and financial contracts shape outcomes in mortgage markets, corporate finance, and real estate.
Most of my work starts from a simple observation: the financial contracts we see in the real world, things like first-loss pieces in securitizations, secured and unsecured debt, bankruptcy procedures, and managerial pay, look the way they do because of frictions. When the people on either side of a deal know different things or want different things, the contracts that arise carry real consequences for how efficiently risk and capital get allocated. I'm interested in understanding those contracts, whether they arise in mortgage markets, corporate finance, or housing. In practice, that curiosity pulls me in a lot of directions, from housing markets and bank runs to intangible capital and the division of rents between workers and shareholders.
Indexed mortgages would protect homeowners from house price crashes, yet they barely exist. We argue the reason is that lenders know more than borrowers about how well any given index tracks actual housing risk, and they have good reasons to prefer indices that don't track it very well. Borrowers anticipate this and rationally reject indexed contracts, leaving everyone stuck with standard mortgages even though better risk sharing is available.
★ Brattle Group Prize, First PlaceA classic prediction of adverse selection theory is that sellers with private information can signal quality by waiting to sell. We test this in the private-label mortgage market and find that loans held longer before being securitized default substantially less, even after controlling for everything investors could observe at sale. Dynamic signaling is real, and the implied cost is about 18 basis points on a typical mortgage.
★ Jensen Prize, Second PlaceFirms borrow against assets when lenders value their collateral, and against cash flows when lenders value them as going concerns. We develop a dynamic contracting theory that makes this distinction precise: financing capacity is cash-flow-based precisely when the intermediary's going-concern valuation of the firm exceeds its liquidation value. The optimal contract implements this with a mix of secured debt and an unsecured credit line, and distress resolution emerges endogenously, mirroring the features of Chapter 7 and Chapter 11.
We develop a dynamic contracting theory of asset- and cash flow-based financing that demonstrates how firm, intermediary, and capital market characteristics jointly shape firms' financing constraints. A firm with imperfect access to equity financing covers financing needs through costly sources: an intermediary and retained cash. The firm's financing capacity is endogenously determined by either the liquidation value of assets (asset-based) or the intermediary's going-concern valuation of the firm's cash flows (cash flow-based). The optimal contract is implemented with defaultable debt — specifically unsecured credit lines and senior-secured debt — and features risk-sharing via bankruptcy. When the firm does well, it repays its debt in full. When it does poorly, distress resolution mirrors U.S. bankruptcy procedures (Chapter 7 and 11). Secured and unsecured debt are complements because risk-sharing via unsecured debt increases secured debt capacity. Debt and equity are dynamic complements because future access to equity financing increases current debt capacity.
This study demonstrates the impact of initial public offerings (IPOs) on local house prices. Applying spatial difference-in-differences methods to IPOs in California from 1993 to 2017, we find house prices increase by 0.7% to 0.9% near an IPO firm's headquarters around filing and issuing dates. Upon lock-up expiration, price changes depend on post-issuance returns. Treating the San Francisco Bay as a commuting barrier, we identify sustained price increases after filings and temporary increases after issuing and lock-up expiration. We also confirm post-IPO price divergence between the treatment and synthetic control areas. Our findings indicate the effect of liquid wealth under mild financial constraints.
We introduce a model to explain the widespread failure to index contracts to aggregate indices, despite the apparent risk-sharing benefits of indexation. Our model features these benefits, but demonstrates that asymmetric information about the ability of indices to measure underlying aggregate states can lead to risk-sharing failures and non-indexation. Suppose that a borrower receives an offer from a lender that features higher repayments in "good" states, in exchange for lower repayments in "bad" states. To make such an offer, a lender must ask for higher average repayments, because the lender is exposed to these aggregate risks. The borrower, however, is concerned that she is paying something for nothing; if the index is a poor measure of the true aggregate state, the cost of this contract might exceed its benefits. We provide conditions under which this effect is strong enough to cause the borrower to reject this contract, and choose a conventional, non-contingent contract instead. Under these conditions, many equilibria are possible, and they can be Pareto-ranked; the use of non-contingent contracts can be viewed as a coordination failure.
Pay-performance sensitivity is a common proxy for the strength of incentives. We show that growth options create a wedge between pay-effort sensitivity, which determines actual incentives, and pay-performance sensitivity, which is the ratio of pay-effort to performance-effort sensitivity. An increase in growth option intensity can increase performance-effort sensitivity more than pay-effort sensitivity, so that as incentives increase, pay-performance sensitivity decreases. We document empirical evidence consistent with this finding. Pay-performance sensitivity, measured by dollar changes in manager wealth over dollar changes in firm value, decreases with proxies for growth option intensity and increases with proxies for growth option exercise.
We analyze how the costs of smoothly adjusting capital, such as incentive costs, affect investment timing. In our model, the owner of a firm holds a real option to increase a lumpy form of capital and can also smoothly adjust an incremental form of capital. Increasing the cost of incremental capital can delay or accelerate investment in lumpy capital. Incentive costs due to moral hazard are a natural source of costs for the accumulation of incremental capital. When moral hazard is severe, delaying investment in lumpy capital is costly and it is optimal to overinvest relative to the first-best case.
A central result in the theory of adverse selection in asset markets is that informed sellers can signal quality by delaying trade. This paper uses the residential mortgage market as a laboratory to test this mechanism. Using detailed, loan-level data on privately securitized mortgages, we find a strong relation between mortgage performance and time-to-sale. Importantly, this finding is conditional on all observable information about the loans. This effect is strongest in the "Alt-A" segment of the market, where loans are often originated with incomplete documentation. The results provide some of the first evidence of a signaling mechanism through delay of trade.
Although the aggregate capital share for U.S. firms has increased, the firm-level capital share has decreased on average. The divergence is due to the largest firms. While these mega-firms now produce a larger output share, their labor compensation has not increased proportionately. We develop a model in which firms insure workers against firm-specific shocks. More productive firms allocate more rents to shareholders, while less productive firms endogenously exit. Increasing firm-level risk delays the exit of less productive firms and increases the measure of mega-firms, raising the aggregate capital share and lowering it on average. We present evidence supporting this mechanism.
Static adverse selection models of security issuance show that informed issuers can perfectly reveal their private information by maintaining a costly stake in the securities they issue. This paper shows that allowing an issuer to both signal current security quality via retention and build a reputation for honesty leads that issuer to misreport quality even when owning a positive stake — the equilibrium is neither separating nor pooling. An issuer retains less as reputation improves and prices are more sensitive to retention when the issuer has a worse reputation.
We consider the optimal design of mortgage-backed securities (MBS) in a dynamic setting in which a mortgage underwriter with limited liability can engage in costly hidden effort to screen borrowers and can sell loans to investors. We show that (i) the timing of payments to the underwriter is the key incentive mechanism, (ii) the maturity of the optimal contract can be short, and that (iii) bundling mortgages is efficient as it allows investors to learn about underwriter effort more quickly, an information enhancement effect. Finally, we demonstrate that the optimal contract can be closely approximated by the "first loss piece."
We develop a text-based measure of intangible investment intensity derived from firms' 10-K filings. Our approach further classifies disclosure text into knowledge, customer, and organization capital. Firms with high intangible intensity are smaller, younger, and invest heavily in R&D, SG&A, and human capital, while the three subcomponents map cleanly to distinct economic firm types. Intangible intensity contains information about future profitability that is not captured by standard accounting measures. Managerial language thus embeds forward-looking signals about intangible investment that accounting data obscure.
Banks' relationships with depositors are valuable when depositors remain sticky, but this value evaporates if they leave. This tension makes banks fragile when rates rise and asset values decline: if depositors leave, the bank fails, justifying their departure. Failures can happen even with liquid assets and deposit insurance, especially for banks with valuable relationships. Bank values exhibit non-linear exposure to interest rates: normally mostly insensitive but highly responsive as losses mount. This complicates capital assessment, as neither mark-to-market nor hold-to-maturity captures bank health. We find evidence supporting these mechanisms during the 2022-23 rate hikes, culminating in Silicon Valley Bank's failure.
We document that, within-region, lower-income zip codes have more volatile returns to housing than do higher-income zip codes, without any corresponding higher returns. We rationalize this finding with a simple model that features a collateral constraint on borrowing and non-homothetic preferences over housing. Shocks to the representative household's marginal rate of substitution lead to volatility in the return to housing via the collateral constraint. We argue that lower-income households have a more volatile marginal rate of substitution, and thus more volatile returns to housing, consistent with our empirical findings. We provide further evidence for our mechanism using (1) variation in wealth induced by lagged housing returns; (2) cross-sectional data on the housing expenditure share; and (3) state-level non-recourse status, which instruments for the tightness of collateral constraints. Finally, we observe that endogenous volatility in housing returns may limit the available supply of housing, via producers' option to delay. Consistent with this hypothesis, the age of the housing stock is monotonically decreasing in local income levels.
A special purpose acquisition company (SPAC) allows sponsors to directly access public capital markets to raise funds to conduct acquisitions. Traditionally, such experts would raise capital for this activity by first tapping private markets to initiate a venture capital (VC) or private equity (PE) fund. We present a model that explains why SPAC financing has recently become attractive relative to the traditional PE-to-IPO approach. PE-to-IPO financing more efficiently separates high-quality from low-quality experts. SPAC financing more efficiently separates good acquisitions from bad acquisitions and therefore is the preferred mode of funding for firms subject to severe adverse selection. Thus, the increased use of SPAC financing is consistent with the recent rise of intangible assets and technology firms, which may have increased the severity of the adverse selection problem over firm acquisitions. The model explains several features of PE-to-IPO and SPAC financing.
We present a model of liquidity management and financing decisions under moral hazard in which a firm accumulates cash to forestall liquidity default. When the cash balance is high, a tension arises between accumulating more cash to reduce the probability of default and providing incentives for the manager. When the cash balance is low, the firm hedges against liquidity default by transferring cash flow risk to the manager via high powered incentives. This risk transfer occurs even though the manager is risk averse and the firm's owners are risk neutral because default is inefficient. Firms with more volatile cash flows transfer less risk to the manager and hold more cash. Agency conflicts lead to endogenous flotation costs related to the severity of the moral hazard problem. These flotation costs always reduce the funds raised during a refinancing round to below the no-moral-hazard benchmark.
While the large-scale asset purchases (LSAPs) have funneled vast amounts of capital into the secondary market for mortgages, the direct effect of these programs on the primary mortgage market is not yet clear. We present evidence that while the LSAPs may have improved conditions for the least risky borrowers, they have not improved conditions for all borrowers. For example, the average FICO score of agency securitized mortgages increased from below 720 (low risk) in 2008 to above 760 (extremely low risk) in 2012. What explains this dramatic shift in the average quality of agency securitized mortgages, and why did it persist even with the flood of capital into the secondary mortgage market from the LSAPs? We argue that the change in the probability of buy back requests on Fannie and Freddie mortgage backed securities can explain the tightening of mortgage credit standards.