List of studied political parties and countries
| Austria (Communist Party of Austria; United Greens; Alternative List; No – Civic Action Group against the Sale of Austria; The Independents – Ligner's List; Dr. Martin's List; Liberal Forum; Citizens Forum of Austria; Team Stronach) |
| Belgium (Christian Flemish People's Union; Democratic Front of the Francophones; Walloon Rally; Ecolo; Agalev; Democratic Union for the Respect of Labour; Rossem; National Front; Vivant; List Dedecker; Workers' Party; People's Party) |
| Cyprus (PAME; Union of the Centre; New Democratic Front; United Democrats; New Horizons; Movement of Ecologists; Free Citizens Movement; National Popular Front; Citizens'Alliance; Animal Party) |
| Denmark (The Independent Party; Socialist People's Party; Liberal Centre; Christian People's Party; Progress Party; Common Course; The Greens; New Alliance; The Alternative) |
| Finland (Smallholders' Party of Finland; Finnish Christian League; Constitutional People's Party; Green League; Pensioners' Party; Young Finns; Alliance for Free Finland; Reform Group; True Finns) |
| France (Gaullist Union; Poujade List; Extreme Right; Unified Socialist Party; Reformist Movement; Republican Radicals; Ecologists; Workers' Struggle; National Front; Other Right; Other Left; Greens; Ecology Generation; Other Greens; Extreme Left; Hunting-Fishing-Nature-Tradition; Revolutionary Communist League; Republican Pole; National Republican Movement; Mouvement pour la France; En Marche; Debout La France) |
| Germany (German Peace Union; National Democratic Party of Germany; The Greens; Party of Democratic Socialism; The Republicans; Alliance ‘90; German People's Union; Pirate Party; Alternative for Germany; Free Voters; Die Partei) |
| Greece (Progressive Party; Popular Orthodox Rally; Ecologist Greens; Independent Greeks; Golden Dawn; Democratic Alliance; Recreate Greece; Action Liberal Alliance; Front of the Greek Anticapitalist Left; The River; Union of Centrists; Teleia) |
| Iceland (National Preservation Party; Independent Democratic Party; Candidature Party; Independents from the South; Women's Union; National Party; Humanist Party; Liberals; Liberal Party; New Force; Icelandic Movement – Living Country; Citizens' Movement; Bright Future; Pirate Party; Household Party; Iceland Democratic Party; Right-Green People's Party; Rainbow; People's Party) |
| Ireland (Sinn Féin; National Progressive Democrats; Workers' Party; Anti H-Block; Progressive Democrats; Green Party; National Party; Socialist Party; People Before Profit; Social Democrats; Renua Ireland; Independents for Change; Independent Alliance) |
| Italy (Proletarian Democracy; Radical Party; Pensioners' Party; Green List; Lombard League; The Network; Forza Italia; Democratic Alliance; Italian Renewal; Italy of Values; European Democracy; New PSI; The Right; Five Star Movement; Civic Choice; Act to Stop the Decline; +Europe) |
| Luxembourg (Independent Party of the Middle Class; Popular Independent Movement; Enrôlés de Force; Independent Socialist Party; Green Alternative Party; Alternative Democratic Reform Party; National Movement; Green and Liberal Alliance; Communist Party Luxembourg; Pirate Party Luxembourg; Party for Full Democracy) |
| Malta (Democratic Alternative) |
| The Netherlands (Pacifist Socialist Party; Farmers' Party; Democrats 1966; Reformed Political League; New Middle Party; Reformed Political Federation; General Elederly Alliance; Socialist Party; Centre Democrats; List Pim Fortuyn; Liveable Netherlands; Party of Freedom; Party for the Animals; 50Plus; Forum for Democracy) |
| Norway (Progress Party; Red Electoral Alliance; Pensioners' Party; Coastal Party; Green Party) |
| Portugal (Christian Democratic Party; Workers' Party for Socialist Unity; Revolutionary Socialist Party; Democratic Renewal Party; National Solidarity Party; Left Bloc; Workers' Communist Party; People-Animals-Nature; Democratic Republican Party) |
| Spain (Democratic and Socialist Centre; Communist Unity Board; Democratic Reformist Party; Ruiz Mateos' Group; Galician Nationalist Bloc; Canarian Coalition; Republican Left of Catalonia; Union for Progress and Democracy; Amaiur; Podemos; Citizens; Animalist Party) |
| Sweden (Christian Democrats; Green Party; New Democracy; Sweden Democrats; Feminist Initiative) |
| Switzerland (Evangelical People's Party; Republican Movement; National Action; Progressive Organizations of Switzerland; Federation of Swiss Green Party; Feminist and Green Alternative Group; Swiss Motorists' Party; Ticino League; Green Liberal Party; Alternative Left) |
| United Kingdom (Scottish National Party; Ulster Unionist Coalition; Referendum Party; United Kingdom Independence Party; Green Party; British National Party) |
Source(s): Emanuele (2016)