1. Growth is Good for the Poor;Robert Cw: Maddex;DPI: Database of Political Institutions. Downloadable from,1995
2. A New Data Set Measuring Income Inequality;Klaus Ds: Deininger;) FH: Freedom House Index. Downloadable at,1996
3. The international almanac of electoral history;Iaeh: Mackie;Witold J. Political Constraints. Downloadable from,1991
4. PT: Persson, Torsten and Guido Tabellini. 1999. The Size and Scope of Government: Comparative Politics with Rational Politicians;PH: Political Handbook. Downloadable from,1998