Recent work documents that better legal institutions are associated with broader equity markets. We investigate whether international differences in legal institutions also help explain the international cross-section of expected stock returns. We document three main regularities. First, total...

We study regulation of the auditing profession in a model where audit quality is unobservable and enforcing regulation is costly. The optimal audit standard falls short of the first-best audit quality, and is increasing in the riskiness of firms and in the amount of funding they seek. The model...

We analyze the effects of judicial errors on the innovative activity of firms. Successful research investment allows to take a new action that may be ex-post welfare enhancing or welfare decreasing (illegal). Deterrence in this setting works by affecting both the incentives to invest in research...

The costs of enforcing contracts is a key determinant of market performance. We document this point with reference to the credit market. We start by presenting a model of opportunistic debtors and inefficient courts. According to the model, improvements in judicial efficiency reduce credit...

Stricter laws require more incisive and costlier enforcement. Since enforcement activity depends both on available tax revenue and the honesty of officials, the optimal legal standard of a benevolent government is increasing in per-capita income and decreasing in officials’ corruption. In...

We model an enforcement problem where firms can take a known and lawful action or seek a profitable innovation that may enhance or reduce welfare. The legislator sets fines calibrated to the harmfulness of unlawful actions. The range of fines defines norm flexibility. Expected sanctions guide...

We analyze how the law and its enforcement affect equity market equilibrium. Improvements in the legal system, while invariably associated with broader equity markets, have different effects on equity returns depending on the institutional change considered and on the degree of international...