Replication Data for: The Power-Sharing Index: Measuring Cross-Group Inclusion with V-Dem Data

Construction and validation materials for the Power-Sharing Index (PSI), a composite measure of de facto political power distribution across social groups. PSI uses five Varieties of Democracy (V-Dem) v15 indicators — Social Group Power (v2pepwrsoc), Gender Power (v2pepwrgen), Civil Liberties Equality (v2clsocgrp), Freedom from Torture (v2cltort), and Freedom from Killings (v2clkill) — aggregated via a hybrid method (geometric mean multiplied by normalized Polyarchy). The repository includes three Quarto documents: Phase 1 (measure construction and aggregation sensitivity analysis), Phase 2 (psychometric validation including internal consistency, dimensionality, and convergent/discriminant validity), and a publication-ready Appendix. Precomputed .rda results files allow reproduction of the Appendix without raw V-Dem data. All analyses conducted in R.