The Role of Collateral in Sudden Stop Models

This paper examines the role of collateral in sudden stop models that feature occasionally binding constraints and endogenous growth. It shows how different assumptions regarding the nature and valuation of collateral alter the dynamics of crisis episodes and the welfare costs of pecuniary externalities. For example, in a model with land as collateral, valuing collateral at the "expected future price" leads to substantially weaker Fisherian deflation effects than the case with collateral valued at the "current price." However, the average size of sudden stops in the two economies are similar because households endogenously avoid the region where large sudden stops would occur. The differences between different collateral valuations and the size of sudden stops are amplified when we abstract from endogenous growth. In another case, assuming collateral is income rather than land leads to smaller sudden stops as income is less volatile than asset prices. Finally, we show that some choices lead to constrained or conditionally efficient allocations whereas others generate inefficiencies, but these inefficiencies are small.