We characterize how public insurance schemes are constrained by hidden financialtransactions. When non-exclusive private insurance entails increasing unit transaction costs,public transfers are only partly offset by hidden private transactions, and can influenceconsumption allocation. We show...

We characterize how public insurance schemes are constrained by hidden financial transactions. When non-exclusive private insurance entails increasing unit transaction costs, public transfers are only partly offset by hidden private transactions, and can influence consumption allocation. We show...

We consider an economy where individuals privately choose effort and trade competitively priced securities that pay off with effort-determined probability. We show that if insurance against a negative shock is sufficiently incomplete, then standard functional form restrictions ensure that...