Secessionist Methods, version 1. Identifies the methods used by 136 secessionist movements between 1946 and 2006. Please cite my 2018 co-authored article in Journal of Conflict Resolution. (data)

Secessionist Types, version 1. Divides 315 secessionist movements between 1900 and 2006 into types. Please cite my 2018 co-authored article in Journal of Conflict Resolution. (data)

Secessionist Movements, version 3. Identifies 403 secessionist movements between 1816 and 2011. Please cite my 2015 article in International Organization. (data)

Proto-States, version 3. Identifies 638 proto-states between 1816 and 2011. Please cite my 2015 article in International Organization. (data)

International System(s) Dataset (ISD), version 1. Identifies 363 sovereign states between 1816 and 2011. Please cite my 2013 co-authored article in International Interactions. (data); (code book)