Oil exporters typically do not consider below-ground assets when allocating their sovereign wealth fund portfolios, and ignore above-ground assets when extracting oil. We present a unified framework for considering both. Subsoil oil should alter a fund’s portfolio through additional leverage...

We study the joint determination of fertility subsidies and Social Security taxes in an overlapping generations model where agents are heterogeneous in endowments. In equilibria where Social Security is valued, old and poor young agents form a coalition that sustains Social Security. When voting...