| 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 data frame | 
| add_ccode_to_gw | Add Correlates of War state system codes to your data with Gleditsch-Ward state codes. | 
| add_contiguity | Add Correlates of War direct contiguity information to a data frame | 
| add_cow_alliance | Add Correlates of War alliance data to a data frame | 
| add_cow_majors | Add Correlates of War major power information to a data frame | 
| add_cow_mids | Add Correlates of War (CoW) Militarized Interstate Dispute (MID) data to dyad-year data frame | 
| add_cow_trade | Add Correlates of War trade data to a data frame | 
| add_cow_wars | Add Correlates of War war data to dyad-year or state-year data frame. | 
| add_creg_fractionalization | Add fractionalization/polarization estimates from CREG to a data frame | 
| add_democracy | Add democracy information to a data frame | 
| add_fpsim | Add dyadic foreign policy similarity measures to your data | 
| add_gml_mids | Add Gibler-Miller-Little (GML) Militarized Interstate Dispute (MID) data to a data frame | 
| add_gwcode_to_cow | Add Gleditsch-Ward state system codes to your 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_lead | Add (Select) Leader Experience and Attribute Descriptions (LEAD) Data to Leader-Year or Leader-Dyad-Year Data | 
| add_lwuf | Add Estimates of Leader Willingness to Use Force to Leader-Year Data | 
| add_minimum_distance | Add minimum distance data to your data frame | 
| add_nmc | Add Correlates of War National Military Capabilities Data | 
| add_peace_years | Add Peace Years to Your Conflict Data | 
| add_rugged_terrain | Add rugged terrain information to a data frame | 
| add_sdp_gdp | Add (Surplus and Gross) Domestic Product Data | 
| add_spells | Add "Spells" to Data | 
| add_strategic_rivalries | Add Thompson and Dreyer's (2012) strategic rivalry data to dyad-year data frame | 
| add_ucdp_acd | Add UCDP Armed Conflict Data to state-year data frame | 
| 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) | 
| ccode_democracy | Democracy data for all Correlates of War states | 
| cow_alliance | Correlates of War directed dyad-year alliance data | 
| cow_capitals | A complete list of capitals and capital transitions for Correlates of War state system members | 
| 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-Ward 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_mid_ddydisps | Directed Dyadic Dispute-Year Data with No Duplicate Dyad-Years (CoW-MID, v. 5.0) | 
| cow_mid_dirdisps | Directed Dyadic Dispute-Year Data (CoW-MID, v. 5.0) | 
| cow_mid_disps | Abbreviated CoW-MID Dispute-level Data (v. 5.0) | 
| cow_mindist | The Minimum Distance Between States in the Correlates of War System, 1886-2019 | 
| 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) | 
| cow_war_inter | Correlates of War Inter-State War Data (v. 4.0) | 
| cow_war_intra | Correlates of War Intra-State War Data (v. 4.1) | 
| create_dyadyears | Create dyad-years from state system membership data | 
| create_leaderdays | Create leader-days from leader data | 
| create_leaderdyadyears | Create leader-dyad-years from the Archigos data | 
| create_leaderyears | Create leader-years from leader data | 
| create_statedays | Create state-days from state system membership data | 
| create_stateyears | Create state-years from state system membership data | 
| creg | Composition of Religious and Ethnic Groups (CREG) Fractionalization/Polarization Estimates | 
| gml_dirdisp | Directed dispute-year data (Gibler, Miller, and Little, 2016) | 
| gml_mid_ddlydisps | Directed Leader-Dyadic Dispute-Year Data with No Duplicate Leader-Dyad-Years (GML, v. 2.2.1, Archigos v. 4.1) | 
| gml_mid_ddydisps | Directed Dyadic Dispute-Year Data with No Duplicate Dyad-Years (GML, v. 2.2.1) | 
| gml_mid_dirleaderdisps | Directed Leader-Dyadic Dispute-Year Data (GML, v. 2.2.1, Archigos v. 4.1) | 
| gml_mid_disps | Abbreviated GML MID Dispute-level Data (v. 2.2.1) | 
| gml_part | Participant Summaries of the GML-MID Data | 
| grh_arms_races | Conventional Arms Races During Periods of Rivalry | 
| gwcode_democracy | Democracy data for all Gleditsch-Ward states | 
| gw_capitals | A complete list of capitals and capital transitions for Gleditsch-Ward state system members | 
| gw_cow_years | Gleditsch-Ward states and Correlates of War, by year | 
| 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, 1886-2019 | 
| gw_sdp_gdp | (Surplus and Gross) Domestic Product for Gleditsch-Ward States | 
| gw_states | Gleditsch-Ward (Independent States) System Membership Data (1816-2017) |