We examine the role that buyers in global supply chains play in helping vendors uncover productivity-enhancing labor management innovations. We report on a buyer-directed NGO-coordinated factory-based program targeting intestinal parasites and anemia in seven Bangalore apparel factories. Raw pre-post productivity comparisons were confounded by factory organizational changes that were implemented in anticipation of the termination of the Multi Fiber Arrangement (MFA). Using a difference-in-difference-in-difference (DDD) estimator, a full complement of medically appropriate treatment was found to increase individual productivity.