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Terrorism and land use in agriculture: The case of Boko Haram in Nigeria - a replication attempt of the paper by Adelaja & George (2019)

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  • Ölkers, Tim
  • Kirchner, Ella
  • Mußhoff, Oliver

Abstract

This replication study tests the repeatability of the study conducted by Adelaja and George (2019a) on the relation between Boko Haram related events of armed conflict and agricultural land use decisions. For the computational reproduction of the original results, we used the same datasets and the same methodological approach. Yet, our findings substantially deviate from the results in the original study. To test the robustness of our own results, we applied comprehensive robustness checks, such as using a different measure for armed conflict, including an additional survey wave of the GHS panel data, and applying two different timewise merging procedures. The results of the robustness checks were very sensitive to changes in the underlying data. Hence, we question the internal validity of the study’s findings and argue that there is most likely a more general mismatch between the data, the methodology and the research questions. The bottom-line of this study is not that there are computable differences between Adelaja and George (2019a) and our estimations, but rather that caution should be taken in deriving policy implications from Adelaja and George (2019a) as their results lack internal validity.

Suggested Citation

  • Ölkers, Tim & Kirchner, Ella & Mußhoff, Oliver, 2023. "Terrorism and land use in agriculture: The case of Boko Haram in Nigeria - a replication attempt of the paper by Adelaja & George (2019)," Land Use Policy, Elsevier, vol. 134(C).
    • Handle: RePEc:eee:lauspo:v:134:y:2023:i:c:s026483772300399x
    DOI: 10.1016/j.landusepol.2023.106933
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    References listed on IDEAS

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    1. George, Justin & Adelaja, Adesoji, 2022. "Armed conflicts, forced displacement and food security in host communities," World Development, Elsevier, vol. 158(C).
    2. Adelaja, Adesoji & George, Justin, 2019. "Terrorism and land use in agriculture: The case of Boko Haram in Nigeria," Land Use Policy, Elsevier, vol. 88(C).
    3. Tracy Bradfield & Robert Butler & Emma Dillon & Thia Hennessy & Paul Kilgarriff, 2021. "The Effect of Land Fragmentation on the Technical Inefficiency of Dairy Farms," Journal of Agricultural Economics, Wiley Blackwell, vol. 72(2), pages 486-499, June.
    4. Ankel-Peters, Jörg & Fiala, Nathan & Neubauer, Florian, 2023. "Do economists replicate?," Journal of Economic Behavior & Organization, Elsevier, vol. 212(C), pages 219-232.
    5. Joireman, Sandra F. & Tchatchoua-Djomo, Rosine, 2023. "Post-conflict restitution of customary land: Guidelines and trajectories of change," World Development, Elsevier, vol. 168(C).
    6. Wegenast, Tim & Richetta, Cécile & Krauser, Mario & Leibik, Alexander, 2022. "Grabbed trust? The impact of large-scale land acquisitions on social trust in Africa," World Development, Elsevier, vol. 159(C).
    7. Stefan Wimmer & Robert Finger, 2023. "A note on synthetic data for replication purposes in agricultural economics," Journal of Agricultural Economics, Wiley Blackwell, vol. 74(1), pages 316-323, February.
    8. Henning Schaak & Luise Meissner & Oliver Musshoff, 2023. "New insights on regional differences of the farmland price structure: An extended replication study on the parcel size–price relationship," Applied Economic Perspectives and Policy, John Wiley & Sons, vol. 45(3), pages 1427-1449, September.
    9. Robert Finger & Carola Grebitus & Arne Henningsen, 2023. "Replications in agricultural economics," Applied Economic Perspectives and Policy, John Wiley & Sons, vol. 45(3), pages 1258-1274, September.
    10. Mengesha, Ayelech Kidie & Damyanovic, Doris & Mansberger, Reinfried & Agegnehu, Sayeh Kassaw & Stoeglehner, Gernot, 2021. "Reducing gender inequalities through land titling? The case of Gozamin Woreda," World Development, Elsevier, vol. 145(C).
    11. Gylych Jelilov & Ramat Ayinde & Selman Tetik & Bilal Celik & Natalia Olali, 2018. "Impact Of Terrorism On Agricultural Business In Borno State, Nigeria," APSTRACT: Applied Studies in Agribusiness and Commerce, AGRIMBA, vol. 12(3-4), December.
    12. George, Justin & Adelaja, Adesoji & Awokuse, Titus & Vaughan, Olufemi, 2021. "Terrorist attacks, land resource competition and violent farmer-herder conflicts," Land Use Policy, Elsevier, vol. 102(C).
    13. Adelaja, Adesoji & George, Justin, 2019. "Effects of conflict on agriculture: Evidence from the Boko Haram insurgency," World Development, Elsevier, vol. 117(C), pages 184-195.
    14. Justin George & Adesoji Adelaja & Titus O Awokuse, 2021. "The agricultural impacts of armed conflicts: the case of Fulani militia," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 48(3), pages 538-572.
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