Replication Data for: Sample Composition Fragility — A Diagnostic Framework

Replication package for 'Sample Composition Fragility' by Brian Peters (2026). Develops a diagnostic framework for assessing how sensitive empirical results are to sample composition — which countries are included/excluded. Uses leave-one-country-out, leave-one-region-out, and permutation tests across all papers in the series. Key finding: core demographic results are robust to sample composition, but magnitude varies by 30-50% depending on inclusion of CCA countries and resource exporters.