. Calibrating the model to the US Covid-19 pandemic reveals an 80% reduction in death toll due to voluntary actions and the lockdown … implemented in the United States. The optimal lockdown, however, is more stringent than what was implemented in the United States … underscore the importance of testing, showing its impact on reduced deaths, lower economic costs and laxer lockdown. We use the …

significantly outperform optimal uniform policies and most of the gains can be realized by having stricter lockdown policies on the …. Intuitively, a strict and long lockdown for the most vulnerable group both reduces infections and enables less strict lockdowns …

be realized by having stricter lockdown policies on the oldest group. Intuitively, a strict and long lockdown for the …