What does it take to kill a megaproject? The reverse escalation of commitment

Polarized political debates can lead to infrastructure megaprojects in advanced stages of construction being left unfinished. Although this scenario is uncommon, there are relevant examples that negatively impact the economy and society. Despite their relevance, unfinished megaprojects are scarcely discussed in project studies. However, political events such as a referendum or government transitions jeopardize the continuation of the megaproject, leading to its termination. This paper focuses on unfinished infrastructure megaprojects and employs the escalation of commitment as a theoretical perspective. It addresses the following research question: How political polarization fosters escalation of commitment leading to unfinished infrastructure megaprojects? The paper employs a longitudinal case study, the USD 13 billion Mexico City New International Airport, recently terminated during the construction phase due to a political decision. The paper describes the interplay between the development of infrastructure megaprojects and political polarization. It shows how political narratives can portray a misleading escalation of commitment to justify project termination, even when it is not rational.