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Working Paper
Turbulent Business Cycles
Firm-level evidence suggests that turbulence that reshuffles firms’ productivity rankings rises sharply in recessions. An increase in turbulence reallocates labor and capital from high- to low-productivity firms, reducing aggregate TFP and the stock market value of firms. A real business cycle model with heterogeneous firms and financial frictions can generate the observed macroeconomic and reallocation effects of turbulence. In the model, increased turbulence makes high-productivity firms less likely to remain productive, reducing their expected equity values and tightening their borrowing ...
Working Paper
Investing in the Shadows: FinTech Growth and Mortgage Market Dynamics
The adoption of new technologies is widely viewed as a key driver of the rapid growth of nonbanks in the U.S. mortgage market after the Global Financial Crisis (GFC). This paper studies technology investment by mortgage lenders and its implications for post-GFC market structure. Using a new dataset on lender-level technology investment merged with loan origination records and balance-sheet information, we document that technology-related human capital investment has risen over time, driven disproportionately by banks and larger lenders, and that such investment predicts higher subsequent ...
Working Paper
Monetary Policy under Multiple Financing Constraints
We revisit the credit channel of monetary policy when firms face multiple financing constraints. Our theory shows that the multiplicity of constraints dampens the transmission of expansionary policy to firm borrowing and investment notably but amplifies the transmission of policy tightening. This asymmetry arises because, when policy tightens (eases), the most (least) responsive constraint binds. Using U.S. firm-level data and exploiting a quasi-natural experiment, we find strong support for these predictions. Embedding the mechanism into a New Keynesian framework, we find that the drop in ...
Working Paper
Federal Reserve Balance-Sheet Policy in an Ample Reserves Framework: An Inventory Approach
I apply techniques from stochastic inventory theory to calibrate the optimal balance-sheet buffer needed to implement monetary policy in an ample reserves regime. I quantify the size of the buffer to be about $60 billion. This is small relative to the reserves needed for an ample reserves regime, even though the FOMC appears to act as if the cost of too few reserves is over 20 times as high as the cost of too many.
Working Paper
Spread Too Thin: The Impact of Lean Inventories
Widespread adoption of just-in-time (JIT) production has reduced inventory holdings. This paper finds that JIT creates a trade-off between firm profitability and vulnerability to large shocks. Empirically, JIT adopters experience higher sales and less volatility while also exhibiting heightened cyclicality and sensitivity to natural disasters. I explain these facts in a structurally estimated general equilibrium model where firms can adopt JIT. Relative to a no-JIT economy, the estimated model implies a 1.3% increase in firm value. At the same time, an unanticipated shock results in a roughly ...