State action in the ongoing Corona pandemic is characterized by fundamental ignorance and uncertainty in the sense of Frank Knight. In order to exploit the decentralized knowledge of local actors about their risk potential and preferences, Stéphane Luchini, Patrick Pintus and Miriam Teschl therefore propose a newly developed acceleration index. Its use, in contrast to the usual case-based epidemiological indicators, makes it possible to record the acceleration and deceleration of the damage to be minimized and thus to manage the pandemic more effectively. A policy "that combines different forms of available knowledge, namely individual-demand-for-tests-based and testing-as-a-policy-based knowledge is to be preferred over indiscriminate top-down and centralised health policies, especially in liberal democracies."