“This document describes the UCDP/PRIO Armed Conflict Dataset, a joint project between the Uppsala Conflict Data Program (UCDP) at the Department of Peace and Conflict Research, Uppsala University and the Centre for the Study of Civil War at the International Peace Research Institute in Oslo (PRIO). […]
Both UCDP and PRIO offer a range of other datasets, compatible with the UCDP/PRIO dataset.” (codebook, p. 3)
I/ Conflict variable
I/1/ Unit of conflict
| Event (< 0 or 1 death) | Conflict (< 25 deaths) | War (< 100 deaths) | Episode (< 500 deaths) |
|---|---|---|---|
| ∅ | X | ∅ | ∅ |
I/2/ Conflict domain
| State-based conflict | Non-state conflict | One-sided violence | TO BE DETERMINED |
|---|---|---|---|
| X | ∅ | X | ∅ |
One of the following four types of conflict:
1 = extrasystemic (between a state and a non-state group outside its own territory, where the government side is fighting to retain control of a territory outside the state system)
2 = interstate (both sides are states in the Gleditsch and Ward membership system).
3 = intrastate (side A is always a government; side B is always one or more rebel groups; there is no involvement of foreign governments with troops, i.e. there is no side_a_2nd or side_b_2nd coded)
4 = internationalized intrastate (side A is always a government; side B is always one or more rebel groups; there is involvement of foreign governments with troops, i.e. there is at least ONE side_a_2nd or side_b_2nd coded)” (codebook, p. 8)
II/ Time variable
II/1/ Unit of time
| Day | Year |
|---|---|
| X | ∅ |
The date, as precise as possible, of the first battle-related death in the conflict. The date is set after the conflict fulfils all criteria required in the definition of an armed conflict, except for the number of deaths. […]
Date (YYYY-MM-DD)” (codebook, p. 9)
II/2/ Time domain
| Time domain |
|---|
| 31/03/1939 – 20/12/2021 |
The year of observation (1946-2021).” (codebook, p. 8)
(ucdp-prio-acd-221.xlsx, 18/05/2022)
III/ Space variable
III/1/ Unit of space
| Coordinates | Country | Region | TO BE DETERMINED |
|---|---|---|---|
| ∅ | X | ∅ | ∅ |
The name of the country/countries whose government(s) has a primary claim to the incompatibility. Note that this is not necessarily the geographical location of the conflict. Further information on how location is interpreted can be found below, in section 4.1.” (codebook, p. 6)
III/2/ Space domain
| Global | Mediterranean Sea and Sahel | TO BE DETERMINED |
|---|---|---|
| X | ∅ | ∅ |
The region of the incompatibility:
1 = Europe (GWNo: 200-399)
2= Middle East (GWNo: 630-699)
3= Asia (GWNo: 700-999)
4= Africa (GWNo: 400-626)
5= Americas (GWNo: 2-199).” (codebook, p. 10)
IV/ Data structure
IV/1/ Unit of observation
| Unit of conflict (UC) | UC-year | UC-actor | Country-year |
|---|---|---|---|
| ∅ | X | ∅ | ∅ |
| Actor-year | Dyad-year | OTHER | TO BE DETERMINED |
|---|---|---|---|
| ∅ | ∅ | ∅ | ∅ |
IV/2/ Number of observations
| Number of observation |
|---|
| 2 568 |
(ucdp-prio-acd-221.xlsx, 18/05/2022)
V/ All variables
| Conflict name | Conflict type | Intensity |
|---|---|---|
| X | X | X |
| Outcome | Time | Space |
|---|---|---|
| X | X | X |
| Actor | Type of actor | Dyad |
|---|---|---|
| X | ∅ | ∅ |
| Coalition | Deaths | Non-conflit variables |
|---|---|---|
| X | ∅ | ∅ |
The unique identifier of the conflict.” (codebook, p. 6)
“type_of_conflict
One of the following four types of conflict:
1 = extrasystemic (between a state and a non-state group outside its own territory, where the government side is fighting to retain control of a territory outside the state system)
2 = interstate (both sides are states in the Gleditsch and Ward membership system).
3 = intrastate (side A is always a government; side B is always one or more rebel groups; there is no involvement of foreign governments with troops, i.e. there is no side_a_2nd or side_b_2nd coded)
4 = internationalized intrastate (side A is always a government; side B is always one or more rebel groups; there is involvement of foreign governments with troops, i.e. there is at least ONE side_a_2nd or side_b_2nd coded)” (codebook, p. 8)
“intensity_level
The intensity level in the conflict per calendar year. The intensity variable is coded in two categories:5
1= Minor: between 25 and 999 battle-related deaths in a given year.
2= War: at least 1,000 battle-related deaths in a given year.” (codebook, p. 8)
“ep_end
A dummy variable that codes whether the conflict is inactive the following year and an episode of the conflict thus ends. If the conflict is inactive the following year(s), this variable is coded as 1. If not, a 0 is coded. For the latest year in the dataset, it is unknown whether the conflict will be recorded as active or inactive in the following year, and the variable is always given the code 0.” (codebook, p. 9)
“start_date
The date, as precise as possible, of the first battle-related death in the conflict. The date is set after the conflict fulfils all criteria required in the definition of an armed conflict, except for the number of deaths.” (codebook, p. 9)
“location
The name of the country/countries whose government(s) has a primary claim to the incompatibility. Note that this is not necessarily the geographical location of the conflict. Further information on how location is interpreted can be found below, in section 4.1.” (codebook, p. 6)
“side_a
The name of the country/countries of Side A in a conflict. Always the government side in intrastate conflicts. Note that this is a primary party to the conflict.
[…]
side_a_id
The unique identifier of the actor on side A.” (codebook, p. 6)
VI/ Transparency
VI/1/ Sources
| Intergovernmental organizations | Governmental organizations | Non-governmental organizations |
|---|---|---|
| ∅ | ∅ | ∅ |
| Research organizations | Press media | Social media |
|---|---|---|
| ∅ | ∅ | ∅ |
| Other databases | OTHER | TO BE DETERMINED |
|---|---|---|
| ∅ | ∅ | X |
VI/2/ Codebook
| Date | Version |
|---|---|
| 2022 | 22.1 |
VII/ Update
VII/1/ Current version
| Date | Version |
|---|---|
| 2022 | 22.1 |
The version of the dataset: 22.1″ (codebook, p. 10)
“The version number is a combination of a year and a number. The year refers to when the dataset is updated with new observations. If there are changes in the data between yearly updates, or if there are substantial changes in the structure of the dataset, the number behind the year is incremented.” (codebook, p. 14)
VII/2/ Regularly updated ?
| Real-time | Month | Quarter | Annually |
|---|---|---|---|
| ∅ | ∅ | ∅ | X |
| YES, PERIOD TO BE DETERMINED | TO BE DETERMINED |
|---|---|
| ∅ | ∅ |
VIII/ Access
VIII/1/ Registration ?
| YES | NO |
|---|---|
| ∅ | X |
VIII/2/ Formats
| .XLS/.XLSX | .CSV | .DTA | .RDTA |
|---|---|---|---|
| X | X | X | X |
(https://ucdp.uu.se/downloads/index.html#armedconflict, 21/08/2022)
(ucdp-prio-acd-221.xlsx, 18/05/2022)
VIII/3/ API ?
| YES | NO | TO BE DETERMINED |
|---|---|---|
| ∅ | ∅ | X |