This paper proposes an original approach to investigate the influence of insecurity and institutional quality on international trade. We emphasize that insecurity is hardly comparable with other trade barriers such as tariffs because it does not affect all firms similarly. We develop a monopolistic competition trade model with insecurity as a random additional sunk cost for exporting firms. A higher level of insecurity may dissuade large firms to export, while some less productive and smaller ones may be able to enter the export market. Hence, insecurity disrupts firms ’ selection into export markets, and this has particular effects on trade patterns. Two discriminating predictions are derived from the model and confronted to the data. Usin...