## Introduction ## We will conduct a longitudinal study in Italy, UK and Spain to measure short run and long run effects induced by the exposure to CoViD19, by government measures, and by communication strategies. We will randomly sample 1000 participants per country and follow them for four weeks. In week one, we profile participants in terms of health, psychological and economic vulnerability. We also conduct a list experiment to test concern for the economic consequences of mitigation strategies, controlling for Social Desirability Bias. In week two, we investigate whether exposure to CoViD-19 trauma and shock has affected cognitive functions and preferences (risk and time preferences, altruism, trust, and reciprocity). In week three, we test if differences in terms of scientific uncertainty, privacy-related value conflicts, and distributional conflicts affect participants’ approval of different government’s measures and communications strategies. Across the three waves we will monitor evolution of health and economic conditions. ** Relevance for decision-makers and journalists ** (1) Segmented profiling of households in terms of health, psychological, and economic vulnerability and illustration of how they are coping to adjust safety and economic measures and communication strategies; (2) Assessment over four weeks of the effects in terms of trauma (i.e. anxiety) and economic shocks (i.e., job loss) to capture the impact of changing policy measures and their communication on both everyday life and future economic activities; (3) Appraisal of how exposure to Covid-19 and to economic shocks affects preferences and behaviours (trust, altruism, reciprocity, risk attitudes, saving and investments intentions, etc.), producing a bottom up estimate of the short and long run economic impact of the pandemic and lockdown measures; (4) Evaluation of what style of institutional communication is more effective to convince citizens to support a certain policy under conditions of uncertainty, value conflicts, and distributional conflict, to improve communication strategies and behavioural management in the future months ** Sponsoring organisations** A group of companies and research institutions are self-funding this research to help decision makers and media in the midst of the Covid-19 to better manage and communicate from a behavioural perspective. They include: Open Evidence and BDI- Schlesinger Group.