While suppliers are often an excellent source of product innovation for buyers, their propensity to undertake or continue a product development project can be elusive. This study examines how characteristics of the innovation project, including the type of project revenue, type of cost uncertainty, and the contract frame, influence the decision to accept, and subsequently continue, an innovation project. Through a series of controlled behavioral experiments we find that acceptance rates increase when projects are characterized by a low real options value or an entirely new (versus replacement) revenue stream. While these factors have less influence on the supplier's decision to continue the project, once accepted, continuation rates do increase if acceptance and continuation decisions are made by the same person. We also find that using a reward (versus penalty) frame for sustaining supplier engagements significantly increases acceptance rates. This article is protected by copyright. All rights reserved.