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In this paper, we study how war affects happiness using data from the on-going conflict in Ukraine. Using a difference-in-difference design, we find that the average level of happiness declined substantially in areas that experience war directly, with the drop in happiness being roughly comparable to the loss of happiness a relatively well-off person would experience if he/she were to become a poor person. At the same time, despite the fact that the war in the East dominates the local media in Ukraine, respondents in other regions of Ukraine are about as happy as they were before the war.