Extends the Polity data with an alternative measure for participation and a new SIP democracy index.
The Multidimensional Institutional Representation of Political Systems (MIRPS) dataset extends the Polity data with an alternative measure for participation, using the Polyarchy dataset, to correct for several problems with the Polity participation index. The resulting composite democracy index provided by MIRPS is called the Scalar Index of Polities (SIP) index.
Gates, Scott G., Håvard Hegre, Mark P. Jones, and Håvard Strand, 2006. "Institutional Inconsistency and Political Instability: Persistence and Change in Political Systems Revisited, 1800-2000", American Journal of Political Science: 50(4).
Current version: 1.0
Updated: 1 Jan 2006
Range: 1800 - 2000
Units: Active, planned