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Estimating Residential Water Demand in a Relocation Area with Inadequate Piped Water System

 

Rosalina Palanca-Tan*

Department of Economics, Ateneo de Manila University, Quezon City 1108 Philippines


*Corresponding Author: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

 

 

ABSTRACT

This paper assesses household water demand and estimates a demand equation particularly for low-income households in the Philippines. The study uses survey data on the value and volume of household water purchases from different water providers in a government resettlement area. The paper provides empirical evidence on the impact of average water price on household water consumption, as well as the effects of household income and size on household water consumption. The study finds that households buying water from jetmatic pump wells and water tankers pay more than five times that of those served by the piped water system. This much higher cost of water from non-Water District sources could have constrained their water consumption to just about half that of the Water District customers. The estimated water demand equation reveals that demand for water significantly decreases with the average price of water but is only weakly responsive to price changes, with a price elasticity of –0.38. It is also found that water demand is not significantly affected by household income implying that it is not the households’ low income but the unavailability of efficient water providers that constrains consumption to a bare minimum. These findings confirm the high vulnerability of low-income households to inadequate and inefficient water providers, necessitating more prudent programming of the resettlement areas’ water supply system.

 

 


INTRODUCTION

Water resource constraint is a global problem that afflicts both developed and developing countries (Lu et al. 2017). In recent years, the need for integrated water resources management that concentrates on water demand policies has emerged. As a consequence, there is a growing need for studies estimating water demand functions and demand elasticities. Knowledge of the factors influencing domestic water demand is crucial in the design of water policies and programs, especially in the context of increasing water scarcity (Favre and Montginoul 2016). . . . read more

 

 


REFERENCES

ABOLHASANI L, TAJABADI M, SHAHNOUSHI FORUSHAHI N. 2018. Price elasticity of residential water demand: a meta analysis of studies on water demand (case study: Iran). Paper presented at the 30th International Conference of Agricultural Economists; 2018 Jul 28 – Aug 2; Vancouver, Canada: International Association of Agricultural Economists.
AL-QUANIBET MH, JOHNSTON RS. 1985. Municipal demand for water in Kuwait: methodological issues and empirical results. Water Resources Research 2(4): 433–438.
ARBUES F, GARCIA-VALINAS MA, MARTINEZ-ESPINEIRA R. 2003. Estimation of residential water demand: a state-of-the-art review. Journal of Socio-Economics 32: 81–102.
ARBUES F, BARBERAN R, VILLANUA I. 2004. Price impact on urban residential water demand: a dynamic panel data approach. Water Resources Research 40(11). Retrieved on 15 Apr 2019 from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2004WR003092
BILLINGS RB, DAY WM. 1989. Demand management factors in residential water use: the Southern Arizona experience. Journal of the American Water Works Association 81(3): 58–64.
DALHUISEN JM, FLORAX R, DE GROOT H, NIJKAMP P. 2003. Price and income elasticities of residential water demand: a meta-analysis. Land Economics 79(2): 292–308.
DAVID CC, INOCENCIO AB. 1998. Understanding household demand for water: the Metro Manila case [EEPSEA Research Report Series]. Singapore: Environment and Economy Program for Southeast Asia. 25p.
ESPEY M, ESPEY J, SHAW WD. 1997. Price elasticity of residential demand for water: a meta-analysis. Water Resources Research 33(6): 1369–1374.
FAVRE M, MONTGINOUL M. 2016. Estimating household water demand and willingness-to-pay to maintain future access: evidence from Central Tunisia [Working Paper]. Retrieved on 15 Apr 2019 from http://faere.fr/pub/Conf2016/Favre_water-demand-and-wtp_FAERE2016.pdf
LU L, DELLER D, HVIID M. 2017. Price and behavioural signals to encourage water conservation: a Report to Anglian Water. United Kingdom: Centre for Competition Policy, University of East Anglia. 48p.
NAUGES C, WHITTINGTON D. 2010. Estimation of water demand in developing countries: an overview. The World Bank Research Observer 25(2): 263–294.
[PSA] Philippine Statistics Authority. 2015. Family Income and Expenditure Survey 2015. Quezon City, Philippines.
REYNAUD A. 2015. Modelling Household Water Demand in Europe: Insights from a Cross-country Econometric Analyses of EU-28. Luxembourg: Publication Office of the European Union. 249p.
SEBRI M. 2014. A meta-analysis of residential water demand studies. Environment, Development and Sustainability 16(3): 499–520.
TAYLOR LD. 1975. The demand for electricity: a survey. The Bell Journal of Economics 6(1): 74–110.
WORTHINGTON AC, HOFFMAN M. 2008. An empirical survey of residential water demand modelling. Journal of Economic Surveys 22(5): 842–871.