Nuts and Bolts of Punctuated Equilibrium

This chapter presents a comprehensive synthesis of Punctuated Equilibrium Theory (PET), discussing its conceptual foundations, methodological implications, and applications in the Brazilian context. Originally formulated by Baumgartner and Jones, the theory explains patterns of stability and change in public policies based on actors’ bounded rationality, disproportionate attention, and the positive and negative feedback mechanisms that structure decision-making. The chapter revisits key concepts, such as policy image , decision venues, and serial and parallel information processing, and examines how these elements shape patterns of incrementalism and episodes of abrupt change. It then presents a Systematic Literature Review (1993–2024) mapping 55 Brazilian studies that employ PET. The analysis identifies formal trends, predominant methodological choices, analytical gaps, and sectoral patterns of application. The results reveal a growing field, though still marked by a predominance of descriptive studies, limited exploration of causal mechanisms, and strong dependence on the original theoretical model. The chapter concludes by outlining challenges and opportunities for the conceptual and methodological development of PET in Brazil.