You Get What You Pay for: An Analysis of Public Contracts for Engineering Services

To understand the effects of bidder's strategies on contractual modifications, this study utilized econometric methods and a database containing 5,434 engineering service contracts from Brazilian federal government. The results demonstrate the effects arising from the trade-off between the low prices presented in the contractor selection phase and the contractual performance measured by contract modifications. Competition among bidders in a reverse auction with multiple rounds of bid submissions can exacerbate this trade-off, potentially incentivizing risk-taking strategies by bidders. Subsequently, this may lead to the need for contract modifications to facilitate the ongoing execution of the contract.