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Evaluating the Impact on Child Mortality of a Water Supply and Sewerage Expansion in Quiro:Is Water Enough?

Author

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  • Virgilio Galdo

    (Office of Evaluation and Oversight at the Interamerican Development Bank.)

  • Bertha Briceño

    (Office of Evaluation and Oversight at the Interamerican Development Bank.)

Abstract

This paper explores the impact that a water supply and sewerage (W&S) expansion had on child mortality in Quito, Ecuador. Studies have typically estimated the effects of this type of interventions comparing outcome indicators -at the aggregate level- of areas with the facilities and areas that lack them, quite often neglecting systematic differences between treated and non-treated areas. Moreover, at aggregate levels, on the one hand, less comprehensive information may imply greater unobserved and uncontrolled heterogeneity; on the other, heterogeneity within areas may jeopardize identification of impacts. To account for these key observations, we used propensity score matching (PSM) analysis at the individual level. Using indirect methods based on census data we constructed a mortality index at the motherhood level, and calculated five different impact estimators based on the propensity scores. We found that the average impact of the program ranged from 7.2 percent (local linear regression-kernel matching) to 9.0 percent (5-nearest neighbors matching). Matching difference-in-differences estimators also evidenced about an 8 percent reduction in child mortality levels. The reflexive or naïve evaluation for the cross-section would have estimated an average impact of 16.5 percent and the difference- indifferences naïve evaluation would have estimated an average impact of 19 percent, both clearly overstating the intervention's effects. When exploring heterogeneity of impacts, we stratified the sample by quartiles based on expenditure per capita, and surprisingly, no significant improvement among those in the bottom quartile was evidenced in relation to their matched individuals. However, we also observed that even in the poorest quartiles, if a woman had at least primary education, then the household obtained significant gains from W&S interventions. This would suggest the interesting observation that the overall insignificant effect for the bottom quartile was driven by the absence of impact in those who completely lacked education, thus stressing the importance of complimentary private inputs in order to reap the benefits of piped water, as other studies have suggested.

Suggested Citation

  • Virgilio Galdo & Bertha Briceño, 2005. "Evaluating the Impact on Child Mortality of a Water Supply and Sewerage Expansion in Quiro:Is Water Enough?," OVE Working Papers 0105, Inter-American Development Bank, Office of Evaluation and Oversight (OVE).
  • Handle: RePEc:idb:ovewps:0105
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    Cited by:

    1. Bouillon, César P. & Tejerina, Luis, 2006. "Do We Know What Works?: A Systematic Review of Impact Evaluations of Social Programs in Latin America and the Caribbean," IDB Publications (Working Papers) 2801, Inter-American Development Bank.
    2. Mattos, Enlinson & Pinto, Cristine & Teixeira, Lucas Iten & Meloni, Luis, 2020. "Sanitation and Health: Empirical evidence for Brazilian Municipalities," Brazilian Review of Econometrics, Sociedade Brasileira de Econometria - SBE, vol. 39(2), March.
    3. Meeks, Robyn, 2018. "Property Rights and Water Access: Evidence from Land Titling in Rural Peru," World Development, Elsevier, vol. 102(C), pages 345-357.
    4. Robyn Meeks, 2011. "Communal Taps: Assessing the Impacts of Shared Piped Water Supplies in Rural Kyrgyzstan," CID Working Papers 49, Center for International Development at Harvard University.
    5. Inter-American Development Bank (IDB), 2005. "The Millennium Development Goals in Latin America and the Caribbean: Progress, Priorities and IDB Support for their Implementation," IDB Publications (Books), Inter-American Development Bank, number 53698, February.
    6. Rodrigo García Ayala & Andrés Estrugo, 2014. "Assessing the Effects of Climate and Socioeconomic Factors on Vulnerability to Vector-Borne Diseases in Latin America," IDB Publications (Working Papers) 85875, Inter-American Development Bank.
    7. Fabio Sánchez Torres & Alexander Vega Carvajal, 2014. "Cobertura de Acueducto y Alcantarillado, Calidad del Agua y Mortalidad Infantil en Colombia, 2000-2012," Documentos CEDE 12228, Universidad de los Andes, Facultad de Economía, CEDE.
    8. César P. Bouillon & Luis Tejerina, 2006. "Do We Know What Works?: A Systematic Review of Impact Evaluations of Social Programs in Latin America and the Caribbean," IDB Publications (Working Papers) 80443, Inter-American Development Bank.
    9. Granados, Claudia & Sánchez, Fabio, 2014. "Water Reforms, Decentralization and Child Mortality in Colombia, 1990–2005," World Development, Elsevier, vol. 53(C), pages 68-79.

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    More about this item

    Keywords

    water supply; sewerage; child mortality; propensity score matching.;
    All these keywords.

    JEL classification:

    • I12 - Health, Education, and Welfare - - Health - - - Health Behavior
    • O12 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Microeconomic Analyses of Economic Development
    • H43 - Public Economics - - Publicly Provided Goods - - - Project Evaluation; Social Discount Rate

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