Stability and punctuation
For many years, policy studies widely accepted incrementalism, the view that policy changes by small adjustments to previous policy. Analyzing U.S. policies on nuclear power, smoking and pesticides, Baumgartner and Jones (1991, 1993) found a pattern in which policy barely changed during long periods of stability and then changed sharply within short periods. Borrowing the evolutionary biology concept of punctuated equilibrium, in which species remain stable for long periods and then change rapidly, they called this phenomenon punctuated equilibrium. During stable periods, policy monopolies in which a small number of experts and stakeholders control policy are maintained, using positive policy images to keep outside attention at bay.
Policy images, venues and attention
Policy monopolies collapse when policy images change and new policy venues open. Nuclear power, for example, initially enjoyed a positive image as cheap, clean energy, but as safety and environmental concerns rose, opponents found voice in new venues such as congressional hearings, courts and state governments, and policy changed substantially. Jones and Baumgartner (2005) explained this in terms of government information processing and attention. Because of bounded rationality, people and organizations cannot attend to all problems at once, so they ignore signals and then overreact all at once. Jones, Sulkin and Larsen (2003) reported that the greater an institution's decision costs, or friction, the more pronounced such punctuations become.
Budget research and extensions
The theory's signature evidence is the distribution of budget changes. If incrementalism were correct, annual percentage changes in budgets would be close to normally distributed, but in fact the distribution is leptokurtic: very many small changes and more very large changes than expected. Breunig and Koski (2006) found the same pattern in U.S. state budgets, and Jones and colleagues (2009) found it across many countries, calling it a general empirical law of public budgets. Jones and Baumgartner (2012) described how the theory evolved from punctuated equilibrium through the general punctuation thesis to a theory of government information processing. It is regarded, along with the multiple streams framework and the advocacy coalition framework, as a major theory of the policy process.
FAQ
- What is punctuated equilibrium theory in simple terms?
- It holds that policy barely changes most of the time but changes abruptly and substantially when public attention shifts and the way the policy is viewed changes. It explains the pattern of long stability followed by brief, rapid change.
- How does punctuated equilibrium theory differ from incrementalism?
- Incrementalism holds that policy always changes a little at a time, while punctuated equilibrium theory holds that most changes are small but very large changes occasionally occur. Budget data show large changes far more often than incrementalism predicts.
Sources reviewed: 2026-10-26
References
- Baumgartner, F. R., & Jones, B. D. (1991). Agenda dynamics and policy subsystems. The Journal of Politics, 53(4), 1044–1074. The first analysis of how image and venue changes break up policy monopolies.
- Baumgartner, F. R., & Jones, B. D. (1993). Agendas and Instability in American Politics. Chicago: University of Chicago Press. The classic book — policy monopolies, images and venues.
- Jones, B. D., Sulkin, T., & Larsen, H. A. (2003). Policy punctuations in American political institutions. American Political Science Review, 97(1), 151–169. More institutional friction, more leptokurtic change — why punctuations arise.
- Jones, B. D., & Baumgartner, F. R. (2005). The Politics of Attention: How Government Prioritizes Problems. Chicago: University of Chicago Press. How government attention allocation produces punctuations.
- Breunig, C., & Koski, C. (2006). Punctuated equilibria and budgets in the American states. Policy Studies Journal, 34(3), 363–379. Tests punctuations in U.S. state budgets.
- Jones, B. D., Baumgartner, F. R., Breunig, C., Wlezien, C., Soroka, S., Foucault, M., et al. (2009). A general empirical law of public budgets: A comparative analysis. American Journal of Political Science, 53(4), 855–873. The same budget distribution across countries — a 'general empirical law.'
- Jones, B. D., & Baumgartner, F. R. (2012). From there to here: Punctuated equilibrium to the general punctuation thesis to a theory of government information processing. Policy Studies Journal, 40(1), 1–20. The authors trace the theory's evolution over two decades.