states.Rmd
The gnevar database holds 323 state actors, and 435 episodes of their entry and exit as agents in the international system.
Usually, I have followed the principles of Gledisch and Ward (2013), except in those cases:
Main idea here is to find a moment where a process of political sovereightny and a certain degree of centralization emerged, like the creation of an Empire/Sultanate/Kingdom. In some pre-colonial african polities we lack historical records; that is why I recorded an approximated year date that is commonly accepted in the literature as the start of the rise/centralization of a Kingdom. When I precised an episode in the comment section, it means that I choose this episode over others, because they appeared to me as saliant for the future development of the polity as it was (at least before colonization).
Different states have different ratification procedures, which may also differ depending on whether the type and topic of the agreement. The following is a structured overview of the ratification procedures in Austria, Chile, Colombia, Japan, the Netherlands, and the United States, according to this document (perhaps outdated).