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Repo Runs

Review of Financial Studies 2014 27(4), 957-989
The recent financial crisis has shown that short-term collateralized borrowing may be a highly unstable source of funds in times of stress. In this paper, we develop a dynamic equilibrium model and analyze under what conditions such instability can be a consequence of market-wide changes in expectations. We derive a liquidity constraint and a collateral constraint that determine whether such expectations-driven runs are possible and show that they depend crucially on the microstructure of particular funding markets that we examine in detail. This provides insights into the differences between the tri-party repo market and the bilateral repo market, which were both at the heart of the recent financial crisis.

Seasonal variation in cash flows and the timing role of accruals

Journal of Accounting and Economics 2026 81(3), 101854 open access
This paper examines the function of accruals in measuring quarterly firm performance. We show that operating accruals play a pronounced role in offsetting quarterly cash flow fluctuations and that this timing role is much stronger than concluded based on annual measurements in the recent literature. A fundamental driver of this timing role of accruals is the significant seasonal variation in operating cash flows, which is determined by the interaction between sales seasonality and working capital policies. We further find that the seasonality in cash flows and the offsetting role of accruals have declined over time. We link this trend to international diversification, trends in the importance and seasonality of retail sales, zero-inventory firms, market power, and the rise in supply chain finance.

Forecasting Short-Run Variation in Labor Market Activity

The Review of Economics and Statistics 1968 50(1), 68
EVERY adult consciously or unconsciously determines the extent to which he supplies labor for economic activities. Every business determines the extent to which it wishes to increase its work force by new hiring or the extent to which it wishes to reduce its work force by layoffs. The outcome of these decisions is recorded in a monthly tally of the employed (E), unemployed (U), new hires (h), layoffs and quits (s),' and the number of adults outside the labor force (N). As a first step towards understanding the supply and demand relationships that determine the flows of new hires and separations and the stock of unemployed, the authors have examined the Markov matrix A, that determines transitions between the state of Employment, Et, Unemployment of less than one month's duration Uot, Unemployment of more than one month's duration Ult, and non-labor force participation Nt. By definition

Education and Income

Quarterly Journal of Economics 1963 77(3), 423
Introduction, 423. — The problem of method, 424. — Proposed procedures, 425. — Statistical method and source of data, 426. Explanatory factors in addition to education, 427. — Search for interaction effects, and more detail on education, 430. — Estimated lifetime earnings, 432. — Qualifications, 435. — Summary, 436.

Data-intensive Innovation and the State: Evidence from AI Firms in China

Review of Economic Studies 2023 90(4), 1701-1723 open access
Developing artificial intelligence (AI) technology requires data. In many domains, government data far exceed in magnitude and scope data collected by the private sector, and AI firms often gain access to such data when providing services to the state. We argue that such access can stimulate commercial AI innovation in part because data and trained algorithms are shareable across government and commercial uses. We gather comprehensive information on firms and public security procurement contracts in China’s facial recognition AI industry. We quantify the data accessible through contracts by measuring public security agencies’ capacity to collect surveillance video. Using a triple-differences strategy, we find that data-rich contracts, compared to data-scarce ones, lead recipient firms to develop significantly and substantially more commercial AI software. Our analysis suggests a contribution of government data to the rise of China’s facial recognition AI firms, and that states’ data collection and provision policies could shape AI innovation.

Equivalent Risk Classes: A Multidimensional Examination

Journal of Financial and Quantitative Analysis 1979 14(1), 101
It Is commonplace within the confines of finance literature to explain variations in the firm's residual income stream via the dichotomy of business risk and financial risk. On an ex-post basis the business risk of the enterprise is a direct result of the firm's investment decision and is, thereby, embodied in its asset structure. It follows that the company's cost structure, product demand characteristics, intra-industry competitive position, and managerial talent all affect its business risk posture.

Repo Runs

Review of Financial Studies 2014 27(4), 957-989
The recent financial crisis has shown that short-term collateralized borrowing may be a highly unstable source of funds in times of stress. In this paper, we develop a dynamic equilibrium model and analyze under what conditions such instability can be a consequence of market-wide changes in expectations. We derive a liquidity constraint and a collateral constraint that determine whether such expectations-driven runs are possible and show that they depend crucially on the microstructure of particular funding markets that we examine in detail. This provides insights into the differences between the tri-party repo market and the bilateral repo market, which were both at the heart of the recent financial crisis.

Bank Liquidity, Interbank Markets, and Monetary Policy

Review of Financial Studies 2011 24(8), 2656-2692
A lesson of the recent financial crisis is that the interbank market is crucial for banks facing uncertainty regarding their liquidity needs. This article studies the efficiency of the interbank market in allocating funds. We show that the central bank should lower the interbank rate when confronted with a crisis that causes a disparity in the liquidity held among banks. This suggests that the traditional tenet prescribing the separation between prudential regulation and monetary policy should be abandoned. We also show that failure to cut interest rates during a crisis erodes financial stability by increasing the risk of bank runs.