The recent financial crisis shook not only the global economy but also conventional wisdom about economic policy. After the collapse of Lehman Brothers in September 2008, policy makers reversed course and acted on an unprecedented scale. The policy response was remarkable both for its magnitude...

In this paper I describe group theoretic methods that can be used for analyzing the boundary problems, which arise when the Hamiltonian method is applied to solve the relaxed problem for the multidimensional screening problem. This technique can provide some useful insights into the structure of...