While there is evidence that politics matter for international cooperation, the impact on economic integration of the quality of institutions has been given short shrift in the previous literature. I argue that the quality of institutions raises the quantity and the quality of information available to potential member states during the bargaining phase of a trade agreement. In turn, this inflow of information reduces the negotiation period of an agreement and, in doing so, dampens the transaction costs associated with it. As a result, countries with good institutions are more likely to form trade agreements. Using original data on both the formation of trade agreements and the duration of negotiations, I quantitatively test this argument. The results strongly support the claim that the quality of institutions is a crucial driver in explaining the recent wave of regionalism.