It is well-known that group testing is an efficient strategy to screen for the presence of a virus. It consists in pooling n individual samples with a single test using RT-PCR. If at least one individual is infected, the test is positive, and it is negative otherwise. We show how group testing...

We design and conduct large-scale surveys and experiments in eleven European countries to examine the effect of the COVID-19 pandemic on social trust, reciprocity, solidarity as well as institutional trust. Using incentivized outcome questions on trust and solidarity towards fellow citizens,...