The Regions by Opportunity and Willingness (ROW) Data provides an analytical means of identifying regional clusters based upon whether a group of proximate states (1) is able to reach one another given their material capabilities and (2) choose to interact in their foreign policy activity. Further explanation is provided in the codebook, including a version history.
Version 3: [CSV, country-year data for annual and decadal codes] [PDF, codebook][PDF, revised version 2 decade tables]
Citations:
Rhamey, J. Patrick Jr. 2019. “Regions of Opportunity and Willingness Data Codebook v3.” www.patrickrhamey.com/row.
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Volgy, Thomas J., Paul Bezerra, Jacob Cramer, and J. Patrick Rhamey Jr. 2017. “The Case for Comparative Regional Analysis in International Politics.” International Studies Review 19: 452-480.
Link to gallery of decade maps shown below, generated using historicalmapchart.net
Link to gallery of annual maps shown below, generated using historicalmapchart.net
Version 2: [PDF, region tables by decade]
Citations:
Volgy, Thomas J., Paul Bezerra, Jacob Cramer, and J. Patrick Rhamey Jr. 2017. “The Case for Comparative Regional Analysis in International Politics.” International Studies Review 19: 452-480.
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Volgy, Thomas J., Kelly Marie Gordell, Paul Bezerra, and J. Patrick Rhamey Jr. 2017. “Conflict, Regions, and Regional Hierarchies.” Oxford Research Encyclopedia of Politics. William R. Thompson ed. Oxford: Oxford University Press.
Version 1: [PDF, maps on pages 138-140]
Citation: Rhamey, J. Patrick Jr. 2012. Constrained to Cooperate: Domestic Political Capacity and Regional Order. PhD Dissertation. University of Arizona.