Joseph Stiglitz is one of the world’s greatest economists. He has made fundamental contributions to economic theory in areas such as inequality, the implications of imperfect and asymmetric information, and competition, and he has been a major figure in policy making, a leading public...

We show that supply networks are inefficiently, and insufficiently, resilient. Upstream firms can expand their production capacity to hedge against supply and demand shocks. But the social benefits of such investments are not internalized due to market power and market incompleteness. Upstream...