We present a model of public procurement in which both contractual flexibility and political tolerance for contractual deviations determine renegotiations. In the model, contractual flexibility allows for adaptation without formal renegotiation while political tolerance for deviations decreases...

Public-private partnerships (PPPs) are increasingly used to provide infrastructure services. Even though PPPs have the potential to increase efficiency and improve resource allocation, contract renegotiations have been pervasive

Contract renegotiations allow administrations to replicate the effects of issuing debt. Yet debt issues are incorporated in the budget, must be approved by Congress and are therefore subject to the opposition's review. By contrast, under current accounting standards the obligations created by...

We consider a public-private partnership in an infrastructure project, which requires specialised expertise during the construction stage for the infrastructure to operationalise. This entails that, after an investment is made to begin building the infrastructure, its construction is completed...

There is a growing concern about the frequency of renegotiations in Public Private Partnerships (PPPs). We focus our research on the Portuguese experience and study 254 renegotiation events of 35 PPP contracts since 1995, and examine the triggers of renegotiations and who initiates them. We also...