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| add_archigos | Add Archigos political leader information to dyad-year and state-year data |
| add_atop_alliance | Add Alliance Treaty Obligations and Provisions (ATOP) alliance data to a dyad-year data frame |
| add_capital_distance | Add capital-to-capital distance to a dyad-year or state-year data frame |
| add_contiguity | Add Correlates of War direct contiguity information to a dyad-year or state-year data frame |
| add_cow_alliance | Add Correlates of War alliance data to a dyad-year data frame |
| add_cow_majors | Add Correlates of War major power information to a dyad-year or state-year data frame |
| add_cow_trade | Add Correlates of War trade data to a dyad-year or state-year data frame |
| add_democracy | Add democracy information to dyad-year or state-year data. |
| add_gwcode_to_cow | Add Gleditsch-Ward state system codes to dyad-year or state-year data with Correlates of War state codes. |
| add_igos | Add Correlates of War international governmental organizations (IGOs) data to dyad-year or state-year data. |
| add_mids | Add Gibler-Miller-Little (GML) Militarized Interstate Dispute (MID) data to dyad-year data frame |
| add_minimum_distance | Add minimum distance data to a dyad-year or state-year data frame |
| add_nmc | Add Correlates of War National Military Capabilities Data |
| add_sdp_gdp | Add (Surplus and Gross) Domestic Product Data |
| add_ucdp_onsets | Add UCDP onsets to state-year data |
| archigos | Archigos: A (Subset of a) Dataset on Political Leaders |
| atop_alliance | Alliance Treaty Obligations and Provisions (ATOP) Project Data (v. 5.0) |
| capitals | A complete list of capitals and capital transitions for Correlates of War state system members |
| ccode_democracy | Democracy data for all Correlates of War states |
| citations | Citations for Data/Functions Used in 'peacesciencer' |
| cow_alliance | Correlates of War directed dyad-year alliance data |
| cow_contdir | Correlates of War Direct Contiguity Data (v. 3.2) |
| cow_ddy | A directed dyad-year data frame of Correlates of War state system members |
| cow_gw_years | Correlates of War and Gleditsch-War states, by year |
| cow_igo_ndy | Correlates of War Non-Directed Dyad-Year International Governmental Organizations (IGOs) Data |
| cow_igo_sy | Correlates of War State-Year International Governmental Organizations (IGOs) Data |
| cow_majors | Correlates of War Major Powers Data (1816-2016) |
| cow_mindist | The Minimum Distance Between States in the Correlates of War System, 1946-2015 |
| cow_nmc | Correlates of War National Military Capabilities Data |
| cow_sdp_gdp | (Surplus and Gross) Domestic Product for Correlates of War States |
| cow_states | Correlates of War State System Membership Data (1816-2016) |
| cow_trade_sy | Correlates of War National Trade Data Set (v. 4.0) |
| create_dyadyears | Create dyad-years from state system membership data |
| create_statedays | Create state-days from state system membership data |
| create_stateyears | Create state-years from state system membership data |
| filter_prd | Filter dyad-year data to include just politically relevant dyads |
| gml_dirdisp | Directed dispute-year data (Gibler, Miller, and Little, 2016) |
| gw_ddy | A directed dyad-year data frame of Gleditsch-Ward state system members |
| gw_mindist | The Minimum Distance Between States in the Gleditsch-Ward System, 1946-2015 |
| gw_sdp_gdp | (Surplus and Gross) Domestic Product for Gleditsch-Ward States |
| gw_states | Gleditsch-Ward (Independent States) System Membership Data (1816-2017) |
| maoz_powers | Zeev Maoz' Regional/Global Power Data |
| ucdp_acd | UCDP Armed Conflict Data (ACD) (v. 20.1) |
| ucdp_onsets | UCDP Onset Data (v. 19.1) |