History's Masters The Effect of European Monarchs on State Performance

Sebastian Ottinger and Nico Voigtländer

Econometrica, 2025, vol. 93, issue 1, 95-128

Abstract: We create a novel reign‐level data set for European monarchs, covering all major European states between the 10th and 18th centuries. We first document a strong positive relationship between rulers' cognitive ability and state performance. To address endogeneity issues, we exploit the facts that (i) rulers were appointed according to hereditary succession, independent of their ability, and (ii) the widespread inbreeding among the ruling dynasties of Europe led over centuries to quasirandom variation in ruler ability. We code the degree of blood relationship between the parents of rulers, which also reflects “hidden” layers of inbreeding from previous generations. The coefficient of inbreeding is a strong predictor of ruler ability, and the corresponding instrumental variable results imply that ruler ability had a sizeable effect on the performance of states and their borders. This supports the view that “leaders made history,” shaping the European map until its consolidation into nation states. We also show that rulers mattered only where their power was largely unconstrained. In reigns where parliaments checked the power of monarchs, ruler ability no longer affected their state's performance.

Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:wly:emetrp:v:93:y:2025:i:1:p:95-128

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