Bond market clienteles, the yield curve and the optimal maturity structure of government debt

We propose a clientele-based model of the yield curve and optimal maturity structure of gov-ernment debt. Clienteles are generations of agents at different lifecycle stages in an overlapping-generations economy. An optimal maturity structure exists in the absence of distortionary taxes and induces efficient intergenerational risksharing. If agents are more risk-averse than log, then an increase in the long-horizon clientele raises the price and optimal supply of long-term bonds—effects that we also confirm empirically in a panel of OECD countries. Moreover, un-der the optimal maturity structure catering to clienteles is limited and long-term bonds earn negative expected excess returns