Exchange is motivated by risk sharing given random unobservable incomes.
There is capital accumulation and an endogenous interest rate. The key feature of this environment is that information is mobile across location even while goods are not. Optimal allocations in the dynamic private information resemble real-world credit arrangements in that there are credit balances, credit limits, and installment payments. The steady state has the property that there is a limiting distribution of expected utility entitlements with mobility and a positive fraction of agents who are credit constrained. Please take the time and register at our new service.