Cross-National Time-Series Data Archive (CNTS) 1815-2007

The archive has 194 variables and contains data for over 200 country units, with provision for entries from 1815-2007 (excluding the two modern wartime periods, 1914-1918 and 1940-1945). Economic variables provide information on the gross national product (GNP), government revenues and expenditures, foreign aid, imports and exports per capita, each nation's proportion of world trade, defense and educational expenditures as percentage of the GNP, energy, electric, steel, and cement production and consumption per capita, and the percentage of the workforce in industry and in agriculture.

Data on political regimes and systems include the type of regime, effectiveness of the exe cutive and legislative branches, size of the legislature, polyarchy index of democratic performance, press freedom, political and civil rights, number of coups d'etat, major constitutional and cabinet changes, legislative elections, and dates of independence. Population characteristics variables include population density, urbanization index, internal security forces and the size of the military as proportion of the adult population, and infant mortality rate as proportion of live births.