Institutions and Severe Costs Predict Sanctions Success at All Stages

🔎 What This Note Addresses

Scholarly findings on what makes economic sanctions effective are mixed. Two potential reasons for inconsistent results are examined: the frequent omission of threats (as distinct from imposed sanctions) and sensitivity of results to model specification. The analysis treats threats and imposed sanctions separately and uses a systematic sensitivity-checking approach to reduce model dependence.

📚 What Data and Tests Were Used

• Newly released Threat and Imposition of Economic Sanctions data (TIES).
• Models estimated for both threat episodes and imposed-sanction episodes.
• A methodology that systematically varies model specifications to assess robustness of empirical relationships across multiple plausible models.

📌 Key Findings

• Two factors are positively and robustly associated with sanctions success across every stage examined:
• Involvement of international institutions.
• Severe costs imposed on target states.
• Several other variables show systematic relationships with sanctions success, but their statistical significance depends on the specific model specification.
• Clear differences emerge between threat-stage and imposition-stage results, indicating selection effects that merit targeted follow-up research.

⚖️ Why It Matters

The results help reconcile mixed findings in the sanctions literature by showing that inclusion of threats and rigorous sensitivity analysis change which predictors appear reliable. The consistent importance of international institutions and severe target costs offers a focal point for both scholars and policymakers, while the identified stage differences point to selection processes that require further investigation.