Sanitation Infrastructure

The importance of sanitation in terms of health and welfare has long been recognized. Given the presence of scale economies and environmental externalities, there is also definite scope for government investment in this sector.  However, given other priorities, few low and middle-income governments have the necessary funds and/or capacity to implement full coverage, especially in peri-urban and rural areas where formal housing is sparse and of poor quality. A mismatch between political motivations and household preferences may also complicate the design and implementation of public sanitation projects.

In contexts where households are the primary investors in sanitation, the market often fails to deliver socially optimal outcomes. Willingness to pay tends to be low due to un-internalised externalities. Supply-side barriers, ranging from a lack of trained providers to market power, further limit uptake. Regulation has had limited success, and its enforcement remains weak in many settings.

Both networked and non-networked sanitation solutions are costly, but they offer substantial benefits, particularly when widely adopted. However, achieving high coverage requires overcoming constraints on both the demand and supply sides.

Key priorities for future research and policy include:

• Procurement and cost reduction strategies for expanding sanitation networks—particularly in urban settings with rapidly growing populations and informal settlements.
• Climate resilience of sanitation systems, as the frequency of extreme weather events increases. Both isolated and networked systems need to be re-evaluated under climate change risks such as flooding and migration.
• Complementarities with other interventions, particularly nutrition, hygiene, and infrastructure services, to maximise the health and welfare returns to sanitation investments.
• New approaches to addressing market failures, including centralised market platforms, innovations in service delivery, and pricing mechanisms to encourage uptake and reduce costs.
• Better targeting of subsidies and behavioural interventions, recognising the heterogeneity in household constraints and community-level externalities.
• Understanding government failure and political economy constraints. The limited rollout of large-scale sanitation infrastructure may reflect not only fiscal or technical challenges, but also political under-prioritisation. Future research could explore how government priorities align or misalign with household sanitation needs, and what institutional reforms might better align public spending with public health returns.

As policymakers consider future investments, the evidence underscores the need for integrated strategies—combining infrastructure investment, behavioural change, market shaping, and institutional reform. The path to achieving safe, inclusive, and sustainable sanitation for all will require both technical innovation and sustained political commitment.

References

Abramovsky, L, N Akwunwa, B Augsburg, E Danladi, E Harvey, E Iorkumbur, J Loh, M Lührmann, A Musa, A Oko-Williams, H Olorenshaw, F Oteiza, and J Rud (2025), “Sanitation marketing in Nigeria,” World Development.

Abramovsky, L, B Augsburg, P Jervis, B Malde, and A Phimister (2024), “Complementarities in the production of child health,” Unpublished manuscript.

Abramovsky, L, B Augsburg, M Lührmann, F Oteiza, and J P Rud (2023), “Community matters: Heterogeneous impacts of a sanitation intervention,” World Development, 165: 106197.

Acey, C, J Kisiangani, P Ronoh, C Delaire, E Makena, G Norman, D Levine, R Khush, and R Peletz (2019), “Cross-subsidies for improved sanitation in low-income settlements: Assessing the willingness to pay of water-utility customers in Kenyan cities,” World Development, 115: 160–177.

Adukia, A (2017), “Sanitation and education,” American Economic Journal: Applied Economics, 9(2): 23–59.

Allakulov, U, S Cocciolo, B Das, M A Habib, L Rambjer, and A Tompsett (2023), “Transparency, governance, and water and sanitation: Experimental evidence from schools in rural Bangladesh,” Journal of Development Economics, 163: 103082.

Alsan, M and C Goldin (2019), “Watersheds in child mortality: The role of effective water and sewerage infrastructure, 1880–1920,” Journal of Political Economy, 127(2).

Alzúa, M L, H Djebbari, and A J Pickering (2020), “A community-based programme promotes sanitation,” Economic Development and Cultural Change, 68(2): 357–390.

Andrés, L, B Briceño, C Chase, and J A Echenique (2017), “Sanitation and externalities: Evidence from early-childhood health in rural India,” Journal of Water, Sanitation and Hygiene for Development, 7(2): 272–289.

Andrew, A, O Attanasio, B Augsburg, J Behrman, M Day, P Jervis, C Meghir, and A Phimister (2024), “Mothers’ social networks and socioeconomic gradients of isolation,” Economic Development and Cultural Change, 71.

Armand, A, B Augsburg, A Bancalari, and M Ghatak (2023), “Public service delivery, exclusion and externalities: Theory and experimental evidence from India,” IFS Working Paper.

Armendariz, B and J Morduch (2007), “The economics of microfinance,” MIT Press.

Arnold, B F, S Galiani, P K Ram, A E Hubbard, B Briceño, P J Gertler, and J Colford (2013), “Optimal recall period for caregiver-reported illness in risk-factor and intervention studies: A multicountry study,” American Journal of Epidemiology, 177(4): 361–370.

Ashraf, N, E L Glaeser, and G A Ponzetto (2016), “Infrastructure, incentives, and institutions,” American Economic Review, 106(5): 77–82.

Augsburg, B, A Bancalari, Z Durrani, M Vaidyanathan, and Z White (2022), “When nature calls back: Sustaining behavioral change in rural Pakistan,” Journal of Development Economics, 158: 102933.

Augsburg, B, J P Baquero, S Gautam, and P Rodriguez-Lesmes (2023a), “Sanitation and marriage markets in India: Evidence from the Total Sanitation Campaign,” Journal of Development Economics, 163: 103092.

Augsburg, B, B Caeyers, S Giunti, B Malde, and S Smets (2023b), “Labeled loans and human-capital investments,” Journal of Development Economics, 162: 103053.

Augsburg, B, A Foster, T Johnson, and M Lipscomb (2024), “Evidence on designing sanitation interventions,” Journal of Development Economics, 171: 103316.

Augsburg, B, B Malde, H Olorenshaw, and Z Wahhaj (2023c), “To invest or not to invest in sanitation: The role of intra-household gender differences in perceptions and bargaining power,” Journal of Development Economics, 162: 103074.

Augsburg, B and P A Rodríguez-Lesmes (2018), “Sanitation and child health in India,” World Development, 107: 22–39.

Bakhtiar, M M, R P Guiteras, J Levinsohn, and A M Mobarak (2023), “Social and financial incentives for overcoming a collective-action problem,” Journal of Development Economics, 162: 103072.

Bancalari, A (2024), “The unintended consequences of infrastructure development,” Review of Economics and Statistics, 1–44.

Barnard, S, P Routray, F Majorin, R Peletz, S Boisson, A Sinha, and T Clasen (2013), “Impact of India’s Total Sanitation Campaign on latrine coverage and use: A cross-sectional study in Orissa three years following programme implementation,” PLOS ONE, 8(8): e71438.

Barreto, M L, B Genser, A Strina, A M O Assis, R F Rego, C A Teles, M S Prado, S M Matos, D N Santos, L A dos Santos, et al. (2007), “Effect of a city-wide sanitation programme on reduction in childhood-diarrhoea rates in northeast Brazil: Assessment by two cohort studies,” The Lancet, 370(9599): 1622–1628.

Ben Yishay, A, A Fraker, R Guiteras, G Palloni, N B Shah, S Shirrell, and P Wang (2017), “Microcredit and willingness to pay for environmental quality: Evidence from a randomized-controlled trial of finance for sanitation in rural Cambodia,” Journal of Environmental Economics and Management, 86: 121–140.

Bennett, D (2012), “Does clean water make you dirty? Water supply and sanitation in the Philippines,” Journal of Human Resources, 47(1): 146–173.

Boisson, S, P Sosai, S Ray, P Routray, B Torondel, W-P Schmidt, B Bhanja, and T Clasen (2014), “Promoting latrine construction and use in rural villages practicing open defecation: Process evaluation in connection with a randomised controlled trial in Orissa, India,” BMC Research Notes, 7: 1–12.

Briceño, B, A Coville, P Gertler, and S Martinez (2017), “Are there synergies from combining hygiene and sanitation promotion campaigns? Evidence from a large-scale cluster-randomised trial in rural Tanzania,” PLOS ONE, 12(11): e0186228.

Buttenheim, A M (2008), “The sanitation environment in urban slums: Implications for child health,” Population and Environment, 30: 26–47.

Cameron, L, C Chase, and D C Suarez (2021a), “Relationship between water and sanitation and maternal health: Evidence from Indonesia,” World Development, 147: 105637.

Cameron, L, P Gertler, M Shah, M L Alzúa, S Martinez, and S Patil (2022), “The dirty business of eliminating open defecation: The effect of village sanitation on child height from field experiments in four countries,” Journal of Development Economics, 159: 102990.

Cameron, L, S Olivia, and M Shah (2019), “Scaling up sanitation: Evidence from an RCT in Indonesia,” Journal of Development Economics, 138: 1–16.

Cameron, L, P Santos, M Thomas, and J Albert (2021b), “Sanitation, financial incentives and health spillovers: A cluster-randomised trial,” Journal of Health Economics, 77: 102456.

Clasen, T, S Boisson, P Routray, B Torondel, M Bell, O Cumming, J Ensink, M Freeman, M Jenkins, M Odagiri, et al. (2014), “Effectiveness of a rural-sanitation programme on diarrhoea, soil-transmitted helminth infection, and child malnutrition in Odisha, India: A cluster-randomised trial,” The Lancet Global Health, 2(11): e645–e653.

Coffey, D, M Geruso, and D Spears (2018), “Sanitation, disease externalities and anaemia: Evidence from Nepal,” The Economic Journal, 128(611): 1395–1432.

Coffey, D, A Gupta, P Hathi, N Khurana, D Spears, N Srivastav, and S Vyas (2014), “Revealed preference for open defecation,” Economic & Political Weekly, 49(38): 43.

Coffey, D and D Spears (2018), “Implications of WASH Benefits trials for water and sanitation,” The Lancet Global Health, 6: e615.

Coville, A, S Galiani, P Gertler, and S Yoshida (2023), “Financing municipal water and sanitation services in Nairobi’s informal settlements,” Review of Economics and Statistics, 1–48.

Crocker, J, E Abodoo, D Asamani, W Domapielle, B Gyapong, and J Bartram (2016), “Impact evaluation of training natural leaders during a community-led total sanitation intervention: A cluster-randomised field trial in Ghana,” Environmental Science & Technology, 50(16): 8867–8875.

Crocker, J, D Saywell, and J Bartram (2017), “Sustainability of community-led total sanitation outcomes: Evidence from Ethiopia and Ghana,” International Journal of Hygiene and Environmental Health, 220(3): 551–557.

Cumming, O and V Curtis (2018), “Implications of WASH Benefits trials for water and sanitation,” The Lancet Global Health, 6: e613–e614.

Czura, K, A Menzel, and M Miotto (2024), “Improved menstrual health and the workplace: An RCT with female Bangladeshi garment workers,” Journal of Development Economics, 166: 103174.

Deb, S, G Joseph, L A Andrés, and J G Zabludovsky (2024), “Is the glass half full or half empty? Examining the impact of Swachh Bharat interventions on sanitation and hygiene in rural Punjab, India,” Journal of Development Economics, 170: 103295.

Deutschmann, J W (2025), “Recognizing a good deal: Short-term subsidies and the dynamics of public-service use,” Journal of Environmental Economics and Management, 130: 103114.

Deutschmann, J W, J Gars, J-F Houde, M Lipscomb, and L Schechter (2023), “Privatization of public goods: Evidence from the sanitation sector in Senegal,” Journal of Development Economics, 160: 102971.

Deutschmann, J W, M Lipscomb, L Schechter, and J Zhu (2024), “Spillovers without social interactions in urban sanitation,” American Economic Journal: Applied Economics, 16(3): 482–515.

Devoto, F, E Duflo, P Dupas, W Parienté, and V Pons (2012), “Happiness on tap: Piped-water adoption in urban Morocco,” American Economic Journal: Economic Policy, 4(4): 68–99.

Dewey, K and D Mayers (2011), “Early child growth: How do nutrition and infection interact?” Maternal and Child Nutrition, 7: 129–142.

Dickinson, K L, S R Patil, S K Pattanayak, C Poulos, and J-H Yang (2015), “Nature’s call: Impacts of sanitation choices in Orissa, India,” Economic Development and Cultural Change, 64(1): 1–29.

Dos Santos, C T R and B M Guidetti (2024), “Expansion of piped-water and sewer networks: The effects of regulation,” Unpublished manuscript.

Duflo, E, M Greenstone, R Guiteras, and T Clasen (2015), “Toilets can work: Short- and medium-run health impacts of addressing complementarities and externalities in water and sanitation,” NBER Working Paper No. 21521.

Fuller, J A, E Villamor, W Cevallos, J Trostle, and J N Eisenberg (2016), “I get height with a little help from my friends: Herd protection from sanitation on child growth in rural Ecuador,” International Journal of Epidemiology, 45(2): 460–469.

Galiani, S, P Gertler, and E Schargrodsky (2005), “Water for life: The impact of the privatization of water services on child mortality,” Journal of Political Economy, 113(1): 83–120.

Gao, P, A Kothari, and Y H Lei (2025), “Safe spaces for children: School sanitation and sexual violence,” European Economic Review, 172: 104952.

Garg, T, S E Hamilton, J P Hochard, E P Kresch, and J Talbot (2018), “(Not so) gently down the stream: River pollution and health in Indonesia,” Journal of Environmental Economics and Management, 92: 35–53.

Gautam, S (2023), “Quantifying welfare effects in the presence of externalities: An ex-ante evaluation of sanitation interventions,” Journal of Development Economics, 164: 103083.

Gertler, P, M Gonzalez-Navarro, R Undurraga, and J A Urrego (2024), “In-situ upgrading or population relocation? Direct impacts and spatial spillovers of slum-renewal policies,” University of California, Berkeley, Unpublished manuscript.

Geruso, M and D Spears (2018), “Neighborhood sanitation and infant mortality,” American Economic Journal: Applied Economics, 10(2): 125–162.

Gibson, M A and D W Lawson (2011), “‘Modernization’ increases parental investment and sibling resource competition: Evidence from a rural-development initiative in Ethiopia,” Evolution and Human Behavior, 32(2): 97–105.

Gimaiyo, G, J McManus, M Yarri, S Singh, A Trevett, G Moloney, A Robins, and L Lehmann (2019), “Can child-focused sanitation and nutrition programming improve health practices and outcomes? Evidence from a randomised controlled trial in Kitui County, Kenya,” BMJ Global Health, 4(1): e000973.

Glaeser, E (2004), “Public ownership in the American city,” in Urban Issues and Public Finance: Essays in Honour of Dick Netzer (A E Schwartz, ed.), Edward Elgar, 130–162.

Global Burden of Disease Collaborative Network (2024), “Global Burden of Disease Study 2021 (GBD 2021) cause-specific mortality 1990–2021,” Institute for Health Metrics and Evaluation.

Goncalves, S (2014), “The effects of participatory budgeting on municipal expenditures and infant mortality in Brazil,” World Development, 53: 94–110.

Guiteras, R, J Levinsohn, and A M Mobarak (2015), “Encouraging sanitation investment in the developing world: A cluster-randomized trial,” Science, 348(6237): 903–906.

Guiteras, R P, D I Levine, S P Luby, T H Polley, K Khatun-e Jannat, and L Unicomb (2016), “Disgust, shame, and soapy water: Tests of novel interventions to promote safe water and hygiene,” Journal of the Association of Environmental and Resource Economists, 3(2): 321–359.

Hammer, J and D Spears (2016), “Village sanitation and child health: Effects and external validity in a randomized field experiment in rural India,” Journal of Health Economics, 48: 135–148.

Harari, M (2024), “Residential patterns and local public goods in urban Brazil,” Wharton School, Unpublished manuscript.

Harris, M, M L Alzúa, N Osbert, and A Pickering (2017), “Community-level sanitation coverage more strongly associated with child growth and household drinking-water quality than access to a private toilet in rural Mali,” Environmental Science & Technology, 51(12): 7219–7227.

Harter, M, J Inauen, and H-J Mosler (2020), “How does community-led total sanitation (CLTS) promote latrine construction, and can it be improved? A cluster-randomised controlled trial in Ghana,” Social Science & Medicine, 245: 112705.

Hathi, P, S Haque, L Pant, D Coffey, and D Spears (2017), “Place and child health: The interaction of population density and sanitation in developing countries,” Demography, 54(1): 337–360.

Hossain, M A, K Mahajan, and S Sekhri (2022), “Access to toilets and violence against women,” Journal of Environmental Economics and Management, 114: 102695.

Houde, J-F, T R Johnson, M Lipscomb, and L A Schechter (2022), “Imperfect competition and sanitation: Evidence from randomized auctions in Senegal,” NBER Working Paper.

Humphrey, J H et al. (2019), "Independent and combined effects of improved water, sanitation, and hygiene, and improved complementary feeding, on child stunting and anaemia in rural Zimbabwe: a cluster-randomised trial", The Lancet Global Health, 7(1): E132-147.

Jalan, J and M Ravallion (2003), “Does piped water reduce diarrhea for children in rural India?” Journal of Econometrics, 112(1): 153–173.

Johnson, T and M Lipscomb (2021), “Pricing people into the market: Targeting through mechanism design,” Unpublished manuscript.

Jones, E, M van Vliet, M Qadir, and M Bierkens (2021), “Country-level and gridded estimates of wastewater production, collection, treatment and reuse,” Earth System Science Data, 13(2): 237–253.

Kar, K and K Pasteur (2005), “Subsidy or self-respect? Community-led total sanitation: An update on recent developments,” Community-Led Total Sanitation Secretariat.

Kesztenbaum, L and J-L Rosenthal (2017), “Sewers’ diffusion and the decline of mortality: The case of Paris, 1880–1914,” Journal of Urban Economics, 98: 174–186.

Kresch, E P (2020), “The buck stops where? Federalism, uncertainty, and investment in the Brazilian water and sanitation sector,” American Economic Journal: Economic Policy, 12(3): 374–401.

Kresch, E P, M Lipscomb, and L Schechter (2020), “Externalities and spillovers from sanitation and waste management in urban and rural neighborhoods,” Applied Economic Perspectives and Policy, 42(3): 395–420.

Kresch, E P and R Schneider (2020), “Political determinants of investment in water and sanitation: Evidence from Brazilian elections,” Economics Letters, 189: 109041.

Kresch, E P, M Walker, M C Best, F Gerard, and J Naritomi (2023), “Sanitation and property-tax compliance: Analysing the social contract in Brazil,” Journal of Development Economics, 160: 102954.

Lepault, C (2023), “Is urban wastewater treatment effective in India? Evidence from water quality and infant mortality,” Unpublished manuscript.

Lipscomb, M and A M Mobarak (2016), “Decentralization and pollution spillovers: Evidence from the re-drawing of county borders in Brazil,” The Review of Economic Studies, 84(1): 464–502.

Lipscomb, M, C Montalvo, and B Novak (2025), “The impact of infrastructure investment on resilience to environmental shocks: Evidence from Ecuador,” World Development, 188: 106903.

Lipscomb, M and L Schechter (2018), “Subsidies versus mental-accounting nudges: Harnessing mobile-payment systems to improve sanitation,” Journal of Development Economics, 135: 235–254.

Luby, S P, M Rahman, B F Arnold, L Unicomb, S Ashraf, P J Winch, C P Stewart, F Begum, F Hussain, J Benjamin-Chung, et al. (2018), “Effects of water-quality, sanitation, hand-washing, and nutritional interventions on diarrhoea and child growth in rural Bangladesh: A cluster-randomised controlled trial,” The Lancet Global Health, 6(3): e302–e315.

Macours, K, J V Rueda, and D Webb (2024), “Menstrual stigma, hygiene, and human capital: Experimental evidence from Madagascar,” Unpublished manuscript.

Mbuya, M N and J H Humphrey (2016), “Preventing environmental enteric dysfunction through improved water, sanitation and hygiene: An opportunity for stunting reduction in developing countries,” Maternal & Child Nutrition, 12: 106–120.

McCulloch, S E, M P Schaelling, M Turner, and T Kitagava (2025), “Sewers and urbanization in the developing world,” NBER Working Paper No. 33597.

McRae, S (2015), “Infrastructure quality and the subsidy trap,” American Economic Review, 105(1): 35–66.

Motohashi, K (2024), “Unintended consequences of sanitation investment: Negative externalities on water quality and health in India,” SSRN Working Paper No. 4738911.

Nelson, K L and A Murray (2008), “Sanitation for unserved populations: Technologies, implementation challenges, and opportunities,” Annual Review of Environment and Resources, 33: 119–151.

Null, C, C P Stewart, A J Pickering, H N Dentz, B F Arnold, C D Arnold, J Benjamin-Chung, T Clasen, K G Dewey, L C Fernald, et al. (2018), “Effects of water-quality, sanitation, hand-washing, and nutritional interventions on diarrhoea and child growth in rural Kenya: A cluster-randomised controlled trial,” The Lancet Global Health, 6(3): e316–e329.

Orgill-Meyer, J and S K Pattanayak (2020), “Improved sanitation increases long-term cognitive test scores,” World Development, 132: 104975.

Orgill-Meyer, J, S K Pattanayak, N Chindarkar, K L Dickinson, U Panda, S Rai, A Singha, and M Jeuland (2019), “Long-term impact of a community-led sanitation campaign in India, 2005–2016,” Bulletin of the World Health Organization, 97(8): 523.

Pakhtigian, E L, K L Dickinson, J Orgill-Meyer, and S K Pattanayak (2022), “Sustaining latrine use: Peers, policies, and sanitation behaviors,” Journal of Economic Behavior & Organization, 200: 223–242.

Pakhtigian, E L and S K Pattanayak (2024), “Social setting, gender, and preferences for improved sanitation: Evidence from experimental games in rural India,” World Development, 177: 106556.

Patil, S R, B F Arnold, A L Salvatore, B Briceno, S Ganguly, J M Colford, and P J Gertler (2014), “The effect of India’s Total Sanitation Campaign on defecation behaviors and child health in rural Madhya Pradesh: A cluster-randomised controlled trial,” PLOS Medicine, 11(8): e1001709.

Pattanayak, S K, J-C Yang, K L Dickinson, C Poulos, S R Patil, R K Mallick, J L Blitstein, and P Praharaj (2009), “Shame or subsidy revisited: Social mobilization for sanitation in Orissa, India,” Bulletin of the World Health Organization, 87: 580–587.

Pearson, J and K McPhedran (2008), “A literature review of the non-health impacts of sanitation,” Waterlines, 48–61.

Peletz, R, A Cock-Esteb, D Ysenburg, S Haji, R Khush, and P Dupas (2017), “Supply and demand for improved sanitation: Results from randomized pricing experiments in rural Tanzania,” Environmental Science & Technology, 51(12): 7138–7147.

Peletz, R, J Kisiangani, P Ronoh, A Cock-Esteb, C Chase, R Khush, and J Luoto (2019), “Assessing the demand for plastic-latrine slabs in rural Kenya,” American Journal of Tropical Medicine and Hygiene, 101(3): 555.

Pickering, A, C Null, P Winch, G Mangwadu, B Arnold, J Prendergast, et al. (2019), “The WASH Benefits and SHINE trials: Interpretation of WASH-intervention effects on linear growth and diarrhoea,” The Lancet Global Health, 7: e1139–e1146.

Pickering, A J, H Djebbari, C Lopez, M Coulibaly, and M L Alzúa (2015), “Effect of a community-led sanitation intervention on child diarrhoea and child growth in rural Mali: A cluster-randomised controlled trial,” The Lancet Global Health, 3(11): e701–e711.

Plummer, J and P Cross (2006), “Tackling corruption in the water and sanitation sector in Africa,” World Bank Water and Sanitation Program Report.

Prendergast, A, S Rukobo, B Chasekwa, K Mutasa, R Ntozini, M Mbuya, A Jones, L Moulton, R Stoltzfus, and J Humphrey (2014), “Stunting is characterized by chronic inflammation in Zimbabwean infants,” The FASEB Journal, 28(1 Suppl.): 620.4.

Sclar, G D, J Garn, G Penakalapati, K Alexander, J Krauss, M Freeman, S Boisson, K Medlicott, and T Clasen (2017), “Effects of sanitation on cognitive development and school absence: A systematic review,” International Journal of Hygiene and Environmental Health, 220(6): 917–927.

Sinharoy, S S, W-P Schmidt, R Wendt, L Mfura, E Crossett, K A Grépin, W Jack, B N Rwabufigiri, J Habyarimana, and T Clasen (2017), “Effect of community health clubs on child diarrhoea in western Rwanda: Cluster-randomised controlled trial,” The Lancet Global Health, 5(7): e699–e709.

Spears, D and S Lamba (2016), “Effects of early-life exposure to sanitation on childhood cognitive skills: Evidence from India’s Total Sanitation Campaign,” Journal of Human Resources, 51(2): 298–327.

Stopnitzky, Y (2017), “No toilet, no bride? Intrahousehold bargaining in male-skewed marriage markets in India,” Journal of Development Economics, 127: 269–282.

Thibert, M, L Andres, C Lombana Cordoba, A V Danilenko, G Joseph, and C Borja-Vega (2019), “Doing more with less: Smarter subsidies for water supply and sanitation,” World Bank Report.

UNICEF and WHO (2024), “Progress on drinking-water, sanitation, and hygiene in schools: Special focus on menstrual health,” UNICEF/WHO Joint Monitoring Programme.

United Nations (2017), “The United Nations World Water Development Report 2017: Wastewater, the untapped resource,” UNESCO Report.

Vyas, S, P Kov, S Smets, and D Spears (2016), “Disease externalities and net nutrition: Evidence from changes in sanitation and child height in Cambodia, 2005–2010,” Economics & Human Biology, 23: 235–245.

Wang, D and Y Shen (2022), “Sanitation and work time: Evidence from the Toilet Revolution in rural China,” World Development, 158.

Wankhade, K (2018), “Compendium of innovative technologies for urban sanitation,” Indian Institute for Human Settlements Report.

WaterAid (2018), “WaterAid’s reflections on the results of the WASH Benefits trials – Kenya and Bangladesh,” WaterAid Technical Report.

Watson, T (2006), “Public-health investments and the infant-mortality gap: Evidence from federal sanitation interventions on US Indian reservations,” Journal of Public Economics, 90(8–9): 1537–1560.

Weaver, J, S Sukhtankar, P Niehaus, and K Muralidharan (2024), “Cash transfers for child development: Experimental evidence from India,” NBER Working Paper.

Whittington, D, M Radin, and M Jeuland (2020), “Evidence-based policy analysis? The strange case of the randomized controlled trials of community-led total sanitation,” Oxford Review of Economic Policy, 36(1): 191–221.

WHO UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2022a), “Progress on household drinking-water, sanitation, and hygiene 2000–2022: Special focus on gender,” UNICEF/WHO Report.

WHO UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2022b), “Progress on sanitation and hygiene in Africa 2000–2022,” UNICEF/WHO Report.

Wolf, J, R Johnston, P R Hunter, B Gordon, K Medlicott, and P Prüss-Ustün (2019), “A faecal-contamination index for interpreting heterogeneous diarrhoea impacts of water, sanitation and hygiene interventions and estimates of community-sanitation coverage in low- and middle-income countries,” International Journal of Hygiene and Environmental Health, 222(2).

World Health Organization (2023), “Burden of disease attributable to unsafe drinking-water, sanitation and hygiene, 2019 update,” WHO Report.

Zuin, V, C Delaire, R Peletz, A Cock-Esteb, R Khush, and J Albert (2019), “Policy diffusion in the rural-sanitation sector: Lessons from community-led total sanitation (CLTS),” World Development, 124: 104643.

Zwane, A and M Kremer (2007), “What works in fighting diarrhoeal diseases in developing countries? A critical review,” The World Bank Research Observer, 22: 1–24.

Zwane, A P, J Zinman, E Van Dusen, W Pariente, C Null, E Miguel, M Kremer, D S Karlan, R Hornbeck, X Giné, et al. (2011), “Being surveyed can change later behaviour and related parameter estimates,” Proceedings of the National Academy of Sciences, 108(5): 1821–1826.