Political Data Sources:

Alesina, Alberto; Cohen, Gerald and Roubini, Nouriel (1997), Political Cycles and the Macroeconomy, Cambridge and London, MA: MIT Press.

Alt, James (1985), "Political parties, world demand, and unemployment: domestic and international sources of economic activity," The American Political Science Review, 79: 1016-1040.

Ameringer, Charles -ed. (1983), Political Parties of Europe, USA: Greenwood Press.

Ameringer, Charles -ed. (1992), Political Parties of the Americas, 1980s to 1990s: Canada, Latin America, and the West Indies, USA: Greenwood Press.

Banks, A. (several issues) Political Handbook of the World. State University of New York at Binghampton: CSA Publications.

Chris, Cook and Paxton, John (1992), European Political Facts, 1918-90, New York: Facts on File.

Day, Alan; German, Richard; and Campbell, John (1996), Political Parties of the World (4th ed.), USA and Canada: Stockton Press.

Delury, George (1987), World Encyclopedia of Political Systems & Parties, USA: Facts on File Publications.

Gorvin, Ian (1989), Elections since 1945: a worldwide reference compendium, Harlow, Essex, U.K: Logman; Chicago, Ill., USA: St. James Press.

The World Europa Year Book (several issues), London, England: Europa Publications Limited.

Woldendorp, Jaap; Keman, Hans and Budge, Ian (1998), "Party government in 20 democracies: an update (1990-1995)," European Journal of Political Research, 33: 125-164.