When the state and business interact effectively they can promote a more efficient allocation of scarce resources, appropriate industrial policy and a more effective and prioritised removal of key obstacles to growth, than when the two sides fail to co-operate or engage in harmful collusion. This book, based on original empirical research undertaken in Africa and India, addresses what constitutes the effectiveness of state-business relations, what explains their formation and evolution over time and whether effective state-business relations matter for economic performance.