Trust and Trustworthiness in Procurement Contracts with Retainage

When product quality is unverifiable by third parties, enforceable contracts that condition price upon quality are not feasible. If higher quality is also costly to deliver, moral hazard by sellers flourishes, particularly when procurement is via a competitive auction process. Retainage is a contractual mechanism that presents a solution to the third-party unverifiability problem, by setting aside a portion of the purchase price. After delivery, the buyer has sole discretion over the amount of retainage money that is released to the seller. While generally a feasible contract form to implement, retainage introduces a moral hazard for the buyer. We use laboratory experiments to investigate how and when retainage might be successfully used to facilitate trust and trustworthiness in procurement contracts. We observe that retainage induces a significant improvement in product quality when there are some trustworthy buyers in the population, consistent with a model of fair payment norms that we develop. This improvement is realized at the cost of increased buyer-seller profit inequalities. We also observe that at high levels of retainage, there is a welfare-decreasing market unraveling in which sellers do not bid on contracts. Our results imply that retainage incentives can mitigate the tension between competition and cooperation arising from reverse auctions, but only at appropriate levels of retainage

Trust and Trustworthiness in Imbalanced Markets

In this thesis, we use the methodology of experimental economics to investigate issues of trust and trustworthiness in procurement and the supply chain. First, we develop a procurement model in which both seller-side and buyer-side decisions are endogenous to the trading relationship. We investigate how a real-world contractual incentive mechanism, retainage, can be used to overcome the seller-side moral hazard problem. We find that retainage can improve trade efficiency but in-creases market prices and may deter participation. We offer managerial insights on how to design the retainage mechanism, conditional on levels of trust and trustworthiness. Second, we extend the procurement model to incorporate a contingent contract and show analytically that this contract can mitigate the seller-side moral hazard problem. We observe in a lab experiment that suppliers strategically adjust their bids with a contingent contract and that the contingent contract has unintended behavioural con-sequences, with buyers rewarding sellers less for the quality of works delivered. The results have managerial implications for the use of hierarchical elements in contracts. Third, we analyse theoretically and experimentally the horizontal effects of supply chain late payments. We show that if firms discount payment received after the standard term, then late payments feed into higher prices and reduced competition. Reneging on a standard payment term entails a penalty for the buyer set by a third-party. If this penalty is not set carefully, a welfare loss arises due to price externalities. We demonstrate how free-riding payment behaviours may emerge among financially weaker buyers in the firm population