This paper extends the DeMarzo and Duffie (1999) signaling model from single sales to portfolio sales. It shows that the extended model can account for retention of low quality assets and help explain why retained assets may be of varying quality.

How should successive generations insure each other when the young can default on previously promised transfers to the old? This paper studies intergenerational insurance that maximizes the expected discounted utility of all generations subject to participation constraints for each generation. If complete insurance is unattainable, the optimal intergenerational insurance is history dependent even when the environment is stationary. The risk from a generational shock is spread into the future with periodic “resetting.” If we interpret intergenerational insurance in terms of debt, the fiscal reaction function is nonlinear and the risk premium on debt is lower than the risk premium with complete insurance.