Gates, Scott; Håvard Hegre; Mark P. Jones; & Håvard Strand (2006) Institutional Inconsistency and Political Instability: Polity Duration, 1800-2000, American Journal of Political Science 50(4): 893–908.
Strand, Håvard;Hegre, Håvard;Jones, Mark P.; & Gates, Scott 2007 Democratic Waves? War, New States, and Global Patterns of Democratization, 1800 –2000, presented at Statsvitenskaplig Fagkonferanse, , 3–5 March.
Gates, Scott;Hegre, Håvard;Jones, Mark P.; & Strand, Håvard 2001 On the Shoulders of Giants: A Multi-Dimensional Representation of Political Systems (MIRPS), 1 January.
The Peace Research Institute Oslo (PRIO) conducts research on the conditions for peaceful relations between states, groups and people.