We consider option pricing when dynamic portfolios are discretely rebalanced. The portfolio adjustments only occur after fixed relative variation of the stock price. The stock price follows a marked point process and the market is incomplete. We first characterize the equivalent martingale...

We consider a pure exchange economy under uncertainty in which the traders have the non-partition structure of information. They willing to trade the amounts of state-contingent commodities and they know their own expectations. Common knowledge of these conditions among all the traders can...

We apply the set up of limited commitment model to empirically test the role of informal risk-sharing networks using panel data on informal credit transactions from rural Ethiopia. The empirical estimates provide convincing evidence for the belief that enforcement problem limits the direct role...