A major theory from social psychology claims that external threats can strengthen group identities and cooperation …. This paper exploits the Russian invasion in Ukraine 2014 as a sudden increase in the perceived military threat for eastern …

. Lately, the political opposition to international economic cooperation has been on the rise, but little is known about how … evidence. In 2004, Estonia joined the European Union, which mandated that it withdraws from its FTA with Ukraine (“Uxit … panel estimations that trade volumes between Estonia and Ukraine fell by more than 20%. We find that withdrawing an FTA …

We develop a model that relates self-control and conflict identification to cooperation patterns in social dilemmas. As … of cooperation. This means that there is evidence for an impulse to be selfish and that cooperative behavior requires …

opportunity for profitable cooperation. Our experimental method creates two groups of subjects who are similar but have different … long-run losses. Initially similar, cooperation rates for groups with different intelligence levels diverge, declining in … groups of lower intelligence, and increasing to reach almost full cooperation levels in groups of higher intelligence …