This week, the trio who was directly responsible for the decision to let Lehman fail – Bernanke, Tim Geithner (then New York Fed President), and Hank Paulson (then Treasury Secretary) – joined together at a panel held by Brookings Institution and spoke about the lessons they had learned from the crisis.
Gauti B. Eggertsson, Manuel Lancastre, and Lawrence H. Summers explain in their paper "Aging, Output Per Capita and Secular Stagnation" the role of aging in the Secular Stagnation model.