Starting from the Merton framework for firm defaults we provide the analytics and robustness of the relationship between default probabilities and default correlations. We then derive the implication of these results for the impact of macroeconomic shocks on credit portfolios, for the pricing of...

In the presence of macroeconomic shocks severe enough to threaten the liquidity or solvency of the banking system, the regulator can rely on the funds concentration effect to save long-term investment projects. Some banks are forced into bankruptcy with the result that other banks obtain more...

In this Paper, we design democratic constitutions that can transcend the shortcomings of the unanimity rule. The constitution embeds the unanimity rule in a set of virtue-supporting principles: (a) broad packages with many public projects (bundling) are allowed, but can only be proposed once in...

In this paper, we show that the shortcomings of the unanimity rule can be alleviated by complementing it with the following constitutional principles: broad packages with many public projects can only be proposed once in a legislative term, the agenda setter needs to pay the highest taxes he is...

Some regulatory programs are effective only if firms make some irreversible investments which reduce the cost of compliance. A firm potentially subject to regulation may therefore behave strategically - not investing and thus forcing the regulator to void the proposed regulation. We show that...

We study a credit market with adverse selection and moral hazard where sufficient sorting is impossible. The crucial novel feature is the competition between lenders in their choice of contracts offered. Qualities of investment projects are not observable by banks and investment decisions of...

Most existing estimates of the macroeconomic costs of AIDS, as measured by the reduction in the growth rate of gross domestic product, are modest. For Africa-the continent where the epidemic has hit the hardest-they range between 0.3 and 1.5 percent annually. The reason is that these estimates...