UCDP Conflict Data Analysis
Also known as: UCDP Analysis, UCDP Georeferenced Event Dataset Analysis, Uppsala Conflict Data Analysis, Organized Violence Event Analysis
UCDP conflict data analysis is the coding and quantitative study of organized violence using the datasets of the Uppsala Conflict Data Program. UCDP distinguishes three categories of organized violence — state-based armed conflict, non-state conflict, and one-sided violence against civilians — and codes them from the level of individual fatal events up to annual conflict dyads. The Georeferenced Event Dataset (UCDP-GED), introduced by Sundberg and Melander (2013), pins each event to a place and date, enabling fine-grained spatial and temporal analysis of where and when violence occurs.
Key highlights
- Rigorous, transparent definitions with conservative fatality coding and explicit uncertainty (best/low/high estimates).
- Covers civil, non-state, and one-sided violence that interstate-focused datasets omit.
- Georeferenced events enable fine-grained spatial and temporal analysis.
- Long-running, annually updated, and freely distributed, supporting cumulative and comparable research.
Intuition
This section is available to Pro members. Upgrade to Pro
How it works
This section is available to Pro members. Upgrade to Pro
When to use it
Use UCDP data when you study organized violence — especially civil wars, non-state conflict, and one-sided violence — with carefully validated, conservatively coded fatality and conflict measures, and when you need fine spatial and temporal resolution via UCDP-GED. It is a standard source for the post-1989 period (1946 onward for state-based conflict dyads). It is less suited to interstate disputes short of war (where COW MIDs are standard), to real-time tracking at the speed of ACLED's weekly updates, or to questions requiring actor categories UCDP does not code.
Strengths & limitations
- Rigorous, transparent definitions with conservative fatality coding and explicit uncertainty (best/low/high estimates).
- Covers civil, non-state, and one-sided violence that interstate-focused datasets omit.
- Georeferenced events enable fine-grained spatial and temporal analysis.
- Long-running, annually updated, and freely distributed, supporting cumulative and comparable research.
- The fatality threshold for inclusion can omit low-intensity but politically important violence.
- Reliance on reported sources introduces media and reporting biases, especially in remote or censored areas.
- Conservative coding rules can undercount events relative to broader-net datasets.
- Annual updating means it lags fast-moving events compared with near-real-time alternatives.
Common pitfalls
This section is available to Pro members. Upgrade to Pro
Applications
This section is available to Pro members. Upgrade to Pro
Frequently asked
What are UCDP's three types of organized violence?
State-based armed conflict (at least one party is a government), non-state conflict (between two organized non-state actors, neither a government), and one-sided violence (an organized actor, state or non-state, against unarmed civilians). Separating these lets researchers study civil war, communal and militia fighting, and atrocities against civilians as distinct phenomena with consistent definitions.
How does UCDP differ from ACLED?
Both are conflict event datasets, but they differ in scope and rules. UCDP requires at least one fatality per event and applies conservative sourcing, emphasizing comparability and a long time series; ACLED codes a broader range of political-violence and protest events (including non-fatal ones), updates weekly, and covers more event types. UCDP tends to be more conservative; ACLED captures more low-level activity. The choice depends on whether breadth/timeliness or strict comparability matters more.
What is the 25-death threshold for?
UCDP classifies a state-based armed conflict as active in a given year only if the dyad produces at least 25 battle-related deaths that year; 1,000 deaths in a year defines a war. The threshold provides a clear, replicable boundary for when organized violence counts as armed conflict, though it necessarily excludes lower-intensity violence that may still matter politically.
Sources
- 1.Sundberg, R., & Melander, E. (2013). Introducing the UCDP Georeferenced Event Dataset. Journal of Peace Research, 50(4), 523–532.
You have read it. What now?
Cite this page
ScholarGate. (2026, June 22). UCDP Conflict Data Analysis. ScholarGate. https://scholargate.app/international-relations/ucdp-conflict-data-analysis