Pré-publication, Document de travail: Economic insecurity has attracted growing attention in social, academic and policy cir- cles. However, there is no consensus as to its precise de_nition. Intuitively, economic insecurity is multi-faceted, making any comprehensive formal de_nition that subsumes all possible aspects extremely challenging. We propose a simpli_ed approach, and character- ize a class of individual economic-insecurity measures that are based on the time pro_le of economic resources. We then apply our economic-insecurity measure to data on political preferences. In US, UK and German panel data, and conditional on current economic resources, economic insecurity is associated with both greater political participation (sup- port for a party or the intention to vote) and notably more support for parties on the right of the political spectrum. We in particular _nd that economic insecurity predicts greater support for both Donald Trump before the 2016 US Presidential election and the UK leaving the European Union in the 2016 Brexit referendum.