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Sensitivity of Water Price Elasticity Estimates to Different Data Aggregation Levels

Author

Listed:
  • Yarela Flores Arévalo

    (Universidad de la Serena Chile)

  • Roberto D. Ponce Oliva

    (Universidad del Desarrollo
    Center of Applied Ecology and Sustainability (CAPES)
    Water Research Center for Agriculture and Mining. Chile (ANID/FONDAP/15130015))

  • Francisco J. Fernández

    (Center of Applied Ecology and Sustainability (CAPES)
    Universidad Mayor)

  • Felipe Vásquez-Lavin

    (Universidad del Desarrollo
    Center of Applied Ecology and Sustainability (CAPES)
    Center for Climate and Resilience Research, CR2)

Abstract

The empirical literature on residential water demand employs various data aggregation methods, which depend on whether the aggregation is over consumption, sociodemographic variables, or both. In this study, we distinguish three dataset types—aggregated data, disaggregated data, and semi-aggregated data—to compare the consequences of using a large sample of semi-aggregated data vis-à-vis a small sample of fully disaggregated data on the water price elasticity estimates. We also analyze whether different aggregation levels in the sociodemographic variables affect the water price elasticity estimates when the number of observations is fixed. We employ a discrete-continuous choice model that considers that consumers face an increasing block price structure. Our results demonstrate that the water price elasticities depend upon the level of aggregation of the data used and the sample size. We also find that the water price elasticities are statistically different when comparing a large semi-aggregated sample with a small disaggregated sample.

Suggested Citation

  • Yarela Flores Arévalo & Roberto D. Ponce Oliva & Francisco J. Fernández & Felipe Vásquez-Lavin, 2021. "Sensitivity of Water Price Elasticity Estimates to Different Data Aggregation Levels," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(6), pages 2039-2052, April.
    • Handle: RePEc:spr:waterr:v:35:y:2021:i:6:d:10.1007_s11269-021-02833-3
    DOI: 10.1007/s11269-021-02833-3
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    References listed on IDEAS

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    2. Aina, Ifedotun Victor & Thiam, Djiby Racine & Dinar, Ariel, 2023. "Substitution of piped water and self-supplied groundwater: The case of residential water in South Africa," Utilities Policy, Elsevier, vol. 80(C).

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