Uncertain Leaders Invite Sanctions: How New Autocrats Trigger Escalation

Why This Question Matters

William Spaniel and Bradley C. Smith (ISQ) ask when rival states actually impose economic sanctions rather than resolving disputes without coercive measures. The paper links domestic politics—specifically a leader's hold on power—to international decisions about threats and sanctions, showing that uncertainty about a leader's strength can turn bargaining into punishment.

A Model of Bluffing and Escalation

The authors develop a formal signaling model of domestic power consolidation, threats, and escalation. Under complete information, outcomes depend on whether the target leader has a consolidated hold on power: stable leaders can deter sanction threats, while fragile leaders concede to avoid punishment. When the imposer is uncertain about the target's consolidation, however, vulnerable leaders have incentives to bluff toughness. That bluffing can prompt third parties to impose sanctions that would not have been necessary under full information.

Who Faces Greater Risk?

Spaniel and Smith argue that this information problem is especially acute for newer leaders and is amplified in autocratic settings. Opponents of recently installed leaders are therefore hypothesized to be more likely victims of sanctioning because outsiders cannot reliably observe the leader’s domestic control.

Data and Empirical Strategy

To test these theoretical expectations, the study uses the Threat and Imposition of Sanctions (TIES) dataset. The authors explicitly confront the common selection problems in the sanctions literature—namely that threats and impositions are not randomly distributed—and apply statistical approaches to account for which dyads generate threats before estimating the likelihood that threats are followed by sanctions.

Key Findings

• States are more likely to follow through on threatened sanctions when the target is led by a newer leader.
• This pattern is stronger in autocratic regimes, consistent with the model’s emphasis on limited information about consolidation of power.
• The empirical results hold after accounting for selection into threat episodes and other standard controls used in the sanctions literature.

Implications

The paper reframes some sanction episodes as the product of informational problems and domestic political signals rather than solely material leverage or international norms. Understanding leader tenure and regime type therefore matters for interpreting why and when coercive diplomacy escalates into sanctions.