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Inconsistencies in Cross-Country Price Comparisons over Time: Patterns and Facts

In: Advances in Economic Measurement

Author

Listed:
  • Robert Inklaar

    (University of Groningen)

  • Ryan Marapin

    (University of Groningen)

  • Pieter Woltjer

    (University of Groningen)

  • Marcel Timmer

    (University of Groningen
    Netherlands Bureau for Economic Policy Analysis)

Abstract

Purchasing power parities (PPPs) aim to measure relative price levels across countries, like inflation aims to measure relative price levels over time. Ideally, the change in PPPs over time should be consistent with relative inflation, but in practice inconsistencies tend to be substantial, which leads to uncertainty about the relative size of economies across countries. We look for patterns in the PPP data to better understand when and where inconsistency is a more serious problem. We find smaller inconsistencies between more recent PPP comparisons, for countries more similar in terms of income levels and expenditure patterns, but larger inconsistencies for consumption products where measurement challenges are larger. Inconsistencies that distort the international income distribution are uncommon. More frequent PPP surveys are unlikely to decrease inconsistency.

Suggested Citation

  • Robert Inklaar & Ryan Marapin & Pieter Woltjer & Marcel Timmer, 2022. "Inconsistencies in Cross-Country Price Comparisons over Time: Patterns and Facts," Springer Books, in: Duangkamon Chotikapanich & Alicia N. Rambaldi & Nicholas Rohde (ed.), Advances in Economic Measurement, chapter 0, pages 633-663, Springer.
    • Handle: RePEc:spr:sprchp:978-981-19-2023-3_13
    DOI: 10.1007/978-981-19-2023-3_13
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