We study the effect of capital structure decisions on the incentives for firms in a duopoly to share information through a trade association. Focusing on the case of Cournot competition with demand uncertainty, we find that the standard result for all-equity firms that information will not be shared may be reversed. When one firm has better access to information than the other, leverage may be a way for the latter firm to free-ride on the former firm's information. With ex ante symmetric firms, a trade association will be formed even if information sharing does not occur.