Sequential Screening with Type-Enhancing Investment

Due to the well-known efficiency--rent extraction trade-off, the optimal mechanism in a pure screening environment (e.g., revenue maximization in auctions or cost minimization in procurement) typically calls for distortions in allocative efficiency when agents possess private information at the time of contracting. In this paper, we introduce first-stage type-enhancing hidden investment to a standard sequential screening model of procurement, and find that (1) with convex investment cost, mitigation of allocative distortion must arise; and (2) such mitigation can even be extreme with linear investment cost---procurement cost minimization must require social efficiency when the investment is sufficiently effective