We use a natural experiment — an unexpected judicial decision — to study how the legal enforceability of debt contracts affects consumer lending. In May 2015, a federal court unexpectedly held that the usury laws of three states — New York, Connecticut, and Vermont — applied to certain...

The modern trend is for investors to diversify. Shareholders who own one S&P 500 firm tend to own many of the others as well. This trend casts doubt on the traditional compensation and deterrence rationales for legal rules that hold corporations liable for the acts of their agents. Today, when A...