The Diplomatic Exchange data set tracks diplomatic representation at the level of chargé d'affaires, minister, and ambassador between states from 1817-2005. The Correlates of War Diplomatic Exchange data set captures diplomatic representation at the level of chargé d'affaires, minister, and ambassador between members of the Correlates of War interstate system. The 2006 version of the data set includes information for the following years: 1817, 1824, 1827, 1832, 1836, 1840, every five years between 1844 and 1914, every five years between 1920 and 1940, and every five years between 1950 and 2005. In any papers or publications that utilize this data set, users are asked to give the version number and cite the article of record for the...