Favero, Ichino and Rustichini argue that the high mortality is Lombardy is likely due to lack of enough intensive care units.
Carlo Ambrogio Favero has a draft of a new paper: “Why is COVID-19 Mortality in Lombardy so High? Evidence from the Simulation of a SEIRHC.” Answer: the SEIR model calibrated to international evidence doesn’t work.
Thunström et al: “The benefits and costs of flattening the curve for Covid-19”
Greenstone and Nigan: “Does social distancing matter?”
Flavio Toxvaerd considers how spontaneous social distancing by people influences the path of the epidemic. He shows that by protecting themselves, people “flatten the curve” in a non-coordinated manner.
Dewatripont et al on using testing to safely restart the economy.