Economics
The Relationship Between Veto Player Structure and Anti-Inflation Policy Credibility
Quick fact
Governments with a larger number of veto players—such as multiple coalition partners or bicameral legislatures—may actually enjoy greater anti-inflation credibility because it is harder for future governments to reverse an announced anti-inflation policy. This is one reason why countries with more consensus-oriented institutions often have lower and more stable inflation.
Why this is interesting
Why do some governments successfully convince financial markets that they will fight inflation while others can't, even when they promise to do so? The answer may lie not in the government itself, but in the number of politicians who can veto it.
Read the full explanation
Understanding The Relationship Between Veto Player Structure and Anti-Inflation Policy Credibility
Think of anti-inflation policy as a promise that a government makes. To be credible, that promise must be believable. If a president can unilaterally change policy tomorrow, the promise today is less credible. Veto players are actors—like a president, a chamber of congress, a plurality party in a coalition—whose agreement is required before any policy can change. In many systems, changing a policy requires the consent of several such players. The more veto players and the more dispersed their preferences, the harder it is to change the status quo. So, if the status quo is a low-inflation regime, it becomes sticky: any attempt to reverse it must overcome all those veto hurdles. This stickiness acts as a commitment device. Financial markets and citizens can infer that future governments will find it difficult to abandon the anti-inflation policy, boosting its credibility from the start. Conversely, if the status quo is high inflation, a government may find it extremely difficult to change it because veto players block reforms. Thus, the same structure can both enhance credibility and impede change.
A deeper explanation
The underlying principle is the credible commitment problem in macroeconomic policy. A government that controls policy fully today also controls it tomorrow, so it cannot easily promise to follow its announced policy in the future. Veto player structure affects this problem by changing the ease of policy reversal. In a system with only one veto player (e.g., a single-party parliamentary majority), a future government can quickly change course, so its commitment today is weak. In contrast, when multiple veto players exist (e.g., a multiparty coalition or separate chambers), reversing policy requires assembling a new winning coalition each time. This 'policy persistence' signals to markets that the announced low-inflation course is likely to remain in place. Empirical cross-country studies support this: countries with more veto players tend to have lower average inflation and less inflation volatility, controlling for central bank independence. Note the boundary: the same stickiness that makes low-inflation credible also hinders needed adjustment if the status quo is high inflation. Therefore, the relationship is not uniformly positive; it depends on what the status quo is. This insight matters for choosing institutions: central bank independence is a more direct commitment device, but veto structure exercises its effect by raising the cost of reversal.