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The Origin of the State: Land Productivity or Appropriability? A Comment

Nikolai Cook, Thibaut Duprey, Anthony Heyes, Martino Pelli

Journal of Political Economy, 2026. DOI 10.1086/740225

Has this study been replicated?

The atlas records 1 reproduction of this study. Recorded outcomes: 1 failed.

Reproductions

• The origin of the state: Land productivity or appropriability?: Replication (I4R Discussion Paper Series No, Cook et al. (2023). Outcome recorded: computational issues, robustness challenges. Computational: The data and code provided by MMP closely reproduce the main results presented in their Table 1 (see our Table 1). Any discrepancies we have found are presented in red text; these discrepancies are small and do not change the qualitative interpretation of the results. Outcome read from p. 4, fulltext.

Cite this record

Cook, N., Duprey, T., Heyes, A., & Pelli, M. (2026). The Origin of the State: Land Productivity or Appropriability? A Comment. Journal of Political Economy, 134(7), 2215–2220. https://doi.org/10.1086/740225

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