estimating residential water demand under multi part tariffs using aggregate data using a new model formulation and data from a sample of colorado utilities we investigated the price specification controversy marginal price versus average revenue when estimating residential water demand the improved statistical fit using average

perceived price in residential water demand evidence from a natural experiment abstract under complicated billing structures the price to which consumers respond remains inconclusive in this paper i exploit a quasi experiment to estimate a causal effect of price for residential water customers during the introduction of increasing block rates for a north carolina utility perceived price is identified through a billing anomaly in which changes in marginal and average prices move in opposite directions empirical results contribute evidence that residential water customers respond to average price average price elasticity estimates vary from 0 43 to 1 14 across the distribution of consumption in triple difference models with an estimate of 0 31 in the tightest bandwidth of regression discontinuity specifications

a note on price perception in water demand models a household s decision to acquire price knowledge is endogenous in the demand for utility services and may affect elasticities and consumption levels a simultaneous equation model with endogenous switching is developed to evaluate the effects of price

determinants of household electricity demand a two stage probit approach considerable interest on the part of policy makers in both the public and private sectors has spawned numerous studies of the determinants of residential electricity demand as a result of increased attention given to the possibility of adjusting household electricity consumption patterns through price manipulation as in the various peak load pricing experiments particular emphasis has been placed on obtaining an accurate estimate of the price elasticity of demand unfortunately ols applied to the conventional linear or log linear demand specification is biased and inconsistent when the sample includes households that face declining block rate schedules the inconsistency results from the fact that in the presence of declining block rates observed marginal price is a stochastic regressor that is negatively correlated with the regression error term some researchers have suggested that consistent ols estimation can be achieved by merely respecifying the demand equation to include particular combinations of marginal price average price rate of decline of the price schedule and real income corrected for intra marginal price differences 1 7 8 others realizing the futility of such an approach have developed and applied instrumental variable iv techniques 4 6 11 these iv methods however all involve an artificial linearization of the rate schedule which produces spurious negative correlation between the price variable and the random error term as a result such iv methods tend to overcompensate for actual correlation consequently the iv estimated coefficients of the various demand determinants will exhibit biases opposite in sign to those of their ols counterparts for example in the presence of declining block rates ols tends to overestimate the price elasticity of demand in absolute value while iv methods produce elasticity estimates that are downward biased a two stage probit tsp method developed by terza and welch 10 is not subject to the bias that plagues iv methods because tsp does not require a linear approximation to the rate schedule instead the discrete and discontinuous nature of household responses to declining block pricing is captured by incorporating an ordinal probit model that is based on a theory of consumer choice in the present paper a linear electricity demand model is estimated using the tsp ols and iv methods to demonstrate the effectiveness of the tsp method

electricity demand estimates under increasing block rates using price variables calculated at observed consumption levels this study finds significant bias in ordinary least squares estimates of price elasticities of electricity demand the bias is most severe for specifications using observed average price the finding is important for future econometric work since this type of rate structure is becoming more common the evidence indicates that inappropriate use of ordinary least squares ols overestimates that rate structure premium effect on demand and may underestimate the marginal price elasticity the use of an instrumental variables technique applied to actual rate schedules proves consistent parameter estimates regardless of the rate structure 20 references 3 tables

on the specification of price in studies of consumer demand under block price scheduling using a new model formulation and data from a sample of colorado utilities we investigated the price specification controversy marginal price versus average revenue when estimating residential water demand the improved statistical fit using average

privately operated water utilities municipal price negotiation and estimation of residential water demand the case of france this paper addresses the issue of price negotiation between a municipality and a private water utility operator and its implications for residential water demand estimation we use appropriate econometric procedures to estimate a water demand equation on a panel of french municipalities we find evidence that negotiated water price depends on municipality s characteristics causing endogeneity of price in the demand equation the impact of average household income housing and system features such as metering is investigated both on municipal consumption and price estimated price and income elasticities are significant and close to previous household level studies

an e procurement system for governmental purchasing abstract during the last few years a large number of new procurement business models has been developed mostly concerning companies operating in the private sector their main objective is the introduction of new technologies such as e business for the fulfilment of the procurement process of indirect goods lately such models are also developed for organisations operating in the public sector all over europe this paper presents a case study concerning the analysis of the greek governmental purchasing process carried out from the general secretariat of commerce part of the ministry of development and the functions definition of the new e procurement system the methodological approach as well as the tools used are analysed and the achieved results are presented the objective of the analysis is the identification of potential problematic areas and the design of new processes in order to maximise the possibilities of a successful implementation of a new e procurement system the outcome of the new process design enabled the definition of the analytical functional specifications of the appropriate solution

responses to changes in domestic water tariff structures a latent class analysis on household level data from granada spain a problem that affects the estimation of water demand functions is the presence of unobserved individual heterogeneity which means that a common demand function is unlikely to represent the behavior of all users we implement latent class models to estimate water demand functions for four groups of users who are classified according to their unobservable preferences this more flexible approach makes it possible to distinguish four different response patterns to changes in the drivers of water use including different price elasticities these results should be of particular interest to regulators who would like to tailor water demand management policy to heterogeneous users our analysis exploits household level panel data on residential water demand and consumers characteristics obtained by combining information from a survey of 1 465 domestic users in the city of granada and bimonthly price and consumption data supplied by this city s water supplier from the period 2009 2011

demand side management policies for residential water use who bears the conservation burden to assess the potential for urban demand side management dsm policies as a water resource management tool we analyze the extent to which price and alternative policy instruments such as use and quantity restrictions and subsidies for water efficient technologies reduce residential demand and their distributional implications by type of household using detailed household level panel data for two california communities the results suggest that the ultimate effects of dsm policies in terms of the reduction in aggregate demand and distribution of water savings among household classes depend both on the policy instrument selected and the composition of aggregate demand

do patents over compensate innovators is the current level of patent protection too high or too low to address this issue this paper reformulates the theoretical analysis of the optimal level of patent protection to take into account the empirical findings of the innovation production function literature this literature finds a strong relationship between r d spending and inventions and estimates an elasticity of the supply of inventions of 0 5 or more the paper then assesses the current level of patent protection exploiting estimates of the private and social returns to r d taken from the empirical literature and other available sources although more research is needed for a more precise assessment the evidence available suggests that patents do not over compensate innovators vincenzo denicolo

duplicative research mergers and innovation abstract we show that in the model of federico et al 2017 horizontal mergers may actually spur innovation by preventing duplication of r d efforts federico et al do not notice this result because they presume that the merged firm spreads its r d expenditure evenly across the research units of the merging firms a strategy which is optimal however only if the probability of failure is log convex in the rd effort the possibility that mergers spur innovation is more likely the greater is the value of innovations and the less rapidly diminishing are the returns to r d

microeconometric analysis of residential water demand this paper develops a structural model for obtaining price elasticities and evaluating consumer s response to changes in nonlinear tariffs when only panel data on household consumption are available the model and the empirical strategy address problems implied by nonlinear tariffs existence of a fixed cost and use of limited data giving rise to a random effects model with a nonlinear individual effect results show that the estimated model does well at fitting data and demand is inelastic although elasticity varies by initial consumption block then i estimate welfare consequences of implementing several demand policies

favoring domestic firms in procurement contracts abstract this paper studies the rationale for giving preference to domestic firms in the award of government contracts when the regulator is interested in maximizing domestic welfare it is seen that in the absence of comparative advantages the regulator should discriminate in favor of the domestic firms because foreign firms profits do not enter in domestic welfare furthermore i show that the form of the discrimination function depends on the mechanism being used in order to simplify the implementation of an optimal policy the regulator should choose mechanisms based on second price auctions

dynamic demand for residential electricity in taiwan under seasonality and increasing block pricing abstract this paper studies the dynamic demand for residential electricity in taiwan employing a monthly panel data set composed of 19 counties and spanning the period from 2007 01 to 2013 12 the partial adjustment model used addresses the endogeneity of the electricity price that results from the increasing block pricing the estimated results show that there is a significant seasonal difference in the demand for electricity between the summer and non summer periods both the adjustment speed and own price elasticity during the summer months are found to be lower than those in the non summer months due to the hot weather in summer it is easier for consumers to adjust their electricity consumption in response to the changes in electricity pricing during the non summer time the estimated inelastic short run and long run income effects show that electricity is a necessity for consumers moreover the controversial electricity conservation policies are found to be ineffective measures for reducing electricity consumption in taiwan

discriminatory public procurement policy and cost reduction incentives abstract discriminating in favor of domestic suppliers in the award of government procurement contracts is a widespread practice in this paper we extend the previous analysis of mcafee and mcmillan 1989 government procurement and international trade journal of international economics 26 291 308 and branco 1994 favoring domestic firms in procurement contracts journal of international economics 37 65 80 by considering in the same model the bidding competition stimulation effect and the favoritism effect we prove that the optimal policy can be implemented by a modified vickrey auction or by a complex modified first price auction we also consider that firms can reduce their cost by a nonobservable effort we show that taking moral hazard into account does not modify the awarding rule but that the government must use the payment rule to require a greater level of effort from the favored firm

demand for piped and non piped water supply services evidence from southwest sri lanka in many countries water supply is a service that is seriously underpriced especially for residential consumers this has led to a call for setting cost recovery policies to ensure that the tariffs charged for water supply cover the full cost of service provision identification of factors driving piped and non piped water demand is a necessary prerequisite for predicting how consumers will react to such price increases using cross sectional data of 1 800 households from southwest sri lanka we estimate water demand functions for piped and non piped households using appropriate econometric techniques the marginal price elasticity is estimated at 0 15 for households exclusively relying on piped water and at 0 37 for households using piped water but supplementing their supply with other water sources the time cost elasticity for households relying on non piped water only is estimated at 0 06 on average but varying across sources for both piped and non piped households we find evidence of substitutability between water from different sources we discuss the implications of these results in terms of pricing policy

alternate price specifications for estimating residential water demand with fixed fees using a new model formulation and data from a sample of colorado utilities we investigated the price specification controversy marginal price versus average revenue when estimating residential water demand the improved statistical fit using average revenue as the price variable was shown to be an artifact of the unitary elastic identity created when monthly rate schedules contain a fixed fee when the fixed fee was purged from the data average price was not significant but marginal price remained significant in the preferred double log marginal price model estimated price elasticity was 0 3 and conservation programs had no significant effect on water use

a discrete continuous choice approach to residential water demand under block rate pricing reply waldman is quite correct in noting that the microeconomic theory of block rate pricing in hewitt and hanemann hh 1995 is given for the general case of a k block rate structure whereas the econometric theory is largely confined to the case of exactly two blocks the extension in waldman to the more general case of k blocks is correct although the extension itself could be even more general if it addressed the nonnegativity of demand as is demonstrated below that no apparent attention was paid to the nonnegativity of demand in hh may be attributed to the fact that the need to do so was negated by a fortuitous assumption in the earlier work although that assumption that the errors are multiplicative and lognormally distributed was only maintained and not tested in hh i now estimate two models with the more common assumptions of linear demand and additive and normally distributed errors both with and without a modification for

long run study of residential water consumption the estimation of dynamic models and themeasure of long run effects arerare in residential water demand studies weshow in this paper that a dynamicmodel of water consumption can be derived froma structural optimisation programsolved by local communities thisnonlinear model is estimated on asample of french municipalities and is foundasymptotically equivalent to a dynamic panel data model that is linear in theparameters the latter includes anoriginal error component structure that allowsfor a flexible heterogeneity pattern including both the usual idiosyncraticeffect and an additional individualeffect affected by a multiplicative time varyingparameter as usual gmm estimators for panel data are not consistent inthis case we propose a new gmmprocedure that yields consistent and efficientestimates of short and long runprice elasticities respectively 0 26 and 0 40

optimal asymmetric strategies in research joint ventures abstract this paper identifies an overlooked implication of models of research joint ventures initiated by d aspremont and jacquemin 1988 even though the aggregate r d cost of identical firms in a research joint venture would be lowest if they invested equally to reduce subsequent production costs nonetheless members may often enlarge their overall joint profit by making unequal investments such a strategy raises costs in the investment stage but may create more than offsetting benefits in the production stage since industry profits are larger there when the firms are of unequal size when the consideration leading to asymmetry prevails we find that in contrast to previous work a research joint venture can raise welfare even when there are no spillovers

an empirical survey of residential water demand modelling abstract the increased reliance on demand side management policies as an urban water consumption management tool has stimulated considerable debate among economists water utility managers regulators consumer interest groups and policymakers in turn this has fostered an increasing volume of literature aimed at providing best practice estimates of price and income elasticities quantifying the impact of non price water restrictions and gauging the impact of non discretionary environmental factors affecting residential water demand this paper provides a synoptic survey of empirical residential water demand analyses conducted in the last 25 years both model specification and estimation and the outcomes of the analyses are discussed

demand and distributional effects of water pricing policies abstract worldwide water scarcity threatens delivery of water to urban centers water pricing is often recommended to reduce demand in this paper demand and distributional effects of water pricing policies are examined in a block pricing model that is applied to the metropolitan region of sao paulo water demand functions are estimated using marginal and average price models based on monthly data for the period 1997 2002 price elasticities of water demand range between 0 45 and 0 50 and income elasticities between 0 39 and 0 42 for the current combined regressive progressive block price system the poor spend almost 4 2 to 4 7 of their income on water the rich only pay 0 4 to 0 5 of their income whereas they consume more than twice as much a progressive block price or an income dependent price system may result in a more equalized income distribution however the analysis shows that there is a trade off between a more equalized income distribution and revenues earned by the water company more pro poor pricing systems may result as well in lower revenues for the water company

mergers of complements and entry in innovative industries abstract i study a merger between producers of complement inputs facing potential entry with investment by the incumbents in deterministic cost reduction and by the entrants in probabilistic innovation and then competition in prices the merger solves cournot complementarity problems in investment and pricing which is what makes it profitable but also potentially anti competitive when the demand is inelastic the merger harms consumers by reducing r d of the entrants if the incumbents are efficient enough always when bundling is adopted instead with a demand elastic enough the merger increases consumer surplus even with bundling

energy demand with declining rate schedules an econometric model for the u s commercial sector we specify and estimate a model of the demand for electricity and natural gas in commercial buildings using data from the commercial building energy consumption survey although not observed declining rate schedules are approximated by a downward sloping function fitted to billing data for individual survey units marginal prices rates temperature variables and a large number of building characteristics are incorporated into the model as explanatory variables demand and rate schedule equations constitute a simultaneous system with prices and quantities jointly determined the effects on price elasticities of using endogenous marginal rather than exogenous average prices are estimated to be quite large

procurement and renegotiation parties bound by an incomplete contract have an incentive to renegotiate after acquiring new information the issue of the parties investment in the relationship before renegotiation is analyzed in a simple two period procurement model the firm invests in the first period it then learns its production cost and the sponsor learns its value for the project williamson s underinvestment presumption is shown to hold under very general assumptions about bargaining and about the ex post asymmetry of information as long as the firm s investment is not observable by the sponsor the introduction of a cancellation fee may well lead to even less investment contrary to what is sometimes argued the role of ex ante price fixing as an alternative way to reintroduce some form of commitment and the problem of cost overruns are discussed last it is shown that if investment is observable by the sponsor andthus may become a joint decision variable the two parties may choose to under or overinvest

adverse selection and renegotiation in procurement as was shown by dewatripont optimal long term contracts are generally not sequentially optimal the parties ex post renegotiate them to their mutual advantage this paper fully characterizes the equilibrium of a simple two period procurement situation and studies the extent to which renegotiation reduces ex ante welfare i a central result is that like in the non commitment case the second period allocation is optimal for the principal conditionally on his posterior beliefs about the agent ii the first period allocation exhibits an increasing amount of pooling when the discount factor grows iii with a continuum of types it is never optimal to induce full separation the paper also analyzes whether renegotiated long term contracts yield outcomes resembling those under either unnegotiated long term contracts or a sequence of short term contracts and it links the analysis with the multiple unit durable good monopoly problem

urban residential demand for water in the united states further discussion using a new model formulation and data from a sample of colorado utilities we investigated the price specification controversy marginal price versus average revenue when estimating residential water demand the improved statistical fit using average

assessing a policy grab bag federal water policy reform this article examines the economic impacts of policy alternatives for addressing allocative inefficiencies among agricultural urban and environmental uses of federal water the central valley project improvement act composed of multiple incentive based and command and control policies forms the context for this analysis estimated multi output agricultural revenue functions and urban water demand functions are incorporated into a nonlinear programming model designed to predict changes in water use returns to agriculture and urban consumer surplus results suggest that analysis that does not explicitly model policy instruments implemented at sub optimal levels and as part of a package of reforms could over or underestimate the costs benefits and effectiveness of each policy instrument in much of the western united states the river systems supplying the irrigation water necessary to sustain agricultural production also supply water for municipal and industrial uses provide habitat for numerous species and provide an outlet for the discharge of waste water each of these services is governed by an increasingly complex array of state and federal legislation and regulations first and foremost in terms of the geographic and economic spheres of influence are the policies of the u s bureau of reclamation bureau which controls significant 40 85 portions of river flows in nearly all major river basins in the west the bureau s water supply policies which historically included subsidized prices long term contracts and restrictions on the sale of water by farmers resulted in well documented allocative inefficiencies e g hartman and seastone and wahl among many others environmental degradation associated with reclamation projects has also been well documented u s department of the interior 1996a

government procurement and international trade abstract we model the bidding for a government contract in which there is imperfect competition each bidder is better informed about his own costs than either his rival bidders or the government and the distribution of the domestic firms costs differs from the distribution of foreign firms costs because of comparative advantage effects we find that the government minimizes its expected procurement cost by operating a price preference policy not necessarily purchasing from the lowest bidder

smart meter devices and the effect of feedback on residential electricity consumption evidence from a natural experiment in northern ireland abstract using a unique set of data and exploiting a large scale natural experiment we estimate the effect of real time usage information on residential electricity consumption in northern ireland starting in april 2002 the utility replaced prepayment meters with advanced meters that allow the consumer to track usage in real time we rely on this event account for the endogeneity of price and payment plan with consumption through a plan selection correction term and find that the provision of information is associated with a decline in electricity consumption of 11 17 we find that the reduction is robust to different specifications selection bias correction methods and subsamples of the original data the advanced metering program delivers reasonably cost effective reductions in carbon dioxide emissions even under the most conservative usage reduction scenarios

efficiency and equity in natural resources pricing a proposal for urban water distribution service this paper focuses on the design of optimal prices for urban water distribution service in this context pricing should be aimed at achieving efficiency equity financial aspects and or public acceptability and transparency the proposed tariffs are based on the theoretical frameworks suggested by ramsey 1927 and feldstein 1972 as a prior step estimations of urban water demands and water costs are carried out for the spanish municipality of seville finally an empirical comparison in welfare terms is conducted between the proposed tariffs and those applicable in the year 2000

regulation asymmetric information and auditing this article analyzes a model of a regulated firm that is better informed about its cost function than is the regulator by auditing at a cost however the regulator is assumed to be able to observe the realized cost of the firm if the regulator finds that the firm had misrepresented its costs at the time at which prices were set he can order a refund to consumers in the optimal policy the regulator audits when the firm reports for pricing purposes that its costs will be high and orders a refund when the auditfinds that realized costs are lower than anticipated given the original report a separation result that obtains for an important case indicates that the initial pricing decision is independent of the auditing decision the auditing decision however depends on the price that was initially set the optimal auditing strategy is characterized and the nature of the welfare gains are identified the methodology used in the analysis involves the characterization of an equilibrium of a revelation game with an ex post observable

water demand under alternative price structures we estimate the price elasticity of water demand with household level data structurally modeling the piecewise linear budget constraints imposed by increasing block pricing we develop a mathematical expression for the unconditional price elasticity of demand under increasing block prices and compare conditional and unconditional elasticities analytically and empirically we test the hypothesis that price elasticity may depend on price structure beyond technical differences in elasticity concepts due to the possibility of endogenous utility price structure choice observed differences in elasticity across price structures may be due either to a behavioral response to price structure or to underlying heterogeneity among water utility service areas

the latest enlargement of the eu and buy national rules this paper presents a variety of indicators which reflect the extent of protection of individual manufacturing industries in ten countries of central and eastern europe by the buy national rules in public procurement eight countries joined the eu in 2004 and the two remaining countries will become full members in 2007 combining these data with information on the current international competitiveness of each individual industry the paper identifies those industries that are likely to be particularly sensitive to the abolition of buy national rules due to their recent accession to the european union two series of indicators are proposed to measure the impact of buy national policies the first series outlines the behaviour of the public sector vis a vis domestic production and imports the second series of indicators sketches the industrial structure of the sectors which following the above analysis seem to be protected by preferential public procurement the interaction of both series of indicators can provide information about the extent of protection in terms of public procurement on a sectoral level and about its impact on domestic production

using cost observation to regulate firms the paper emphasizes the use of accounting data in regulatory or procurement contracts when the supplier 1 has superior information about the cost of the project and 2 invests in cost reduction the main result states that under risk neutrality the supplier announces an expected cost and is given an incentive contract linear in cost overruns this optimal contract moves toward a fixed price contract as the announced cost decreases an investment choice is then introduced and the use of a rate of return regulation is studied

comparing residential water demand estimates under decreasing and increasing block rates using household data using a new model formulation and data from a sample of colorado utilities we investigated the price specification controversy marginal price versus average revenue when estimating residential water demand the improved statistical fit using average

welfare and distribution effects of water pricing policies in this paper distribution and welfare effects of changes in block price systems are evaluated a method is discussed to determine for a marshallian demand function equivalent variation in case of a block price system the method is applied to compare for the metropolitan region of sao paulo alternative pricing policies on the basis of their demand welfare and distribution effects of changing water prices results show that there is a trade off between average welfare and income distribution a pro poor price system may result in lower average welfare than a flat price system but in higher individual welfare for the poor moreover there is a trade off between revenues for the water company and income distribution even though pro poor price systems may not be as good for average welfare as flat price systems their direct effects on poverty are important introducing pro poor price systems however may have financial consequences for the water companies

a complete solution to a class of principal agent problems with an application to the control of a self managed firm this paper considers a class of principal agent problems which have the following features 1 there is adverse selection because the principal ignores the value of one parameter of the agent s true characteristics 2 leaving aside the information parameter the principal s welfare as well as the agent s welfare depend on two types of variables observable to both of them the first ones possibly multidimensional are called action variable s and the second one which is one dimensional has in general the meaning of a money transfer 3 the principal is a stackelberg leader of the two person game he can commit himself to decision rules which are admissible on informational grounds he optimizes within the adequate class taking into account besides the agent s reaction one constraint which has generally the meaning of an individual rationality constraint and sometimes of a feasibility constraint the optimization is limited to the class of non stochastic mechanisms 4 the problem can also receive an alternative interpretation the principal faces a continuum of agents of unknown characteristics the distribution being known however stylized principal agent problems of this type have often been considered in the economic literature in particular the reader will later be able to recognize that the standard income tax model a la mirrlees 1971 the quality or quantity choice model of the monopolist a la mussa and rosen 1978 or maskin and riley 1982 and the model of government regulation of the private monopolist of baron and myerson 1982 all belong to

estimating water demand under increasing block tariffs using aggregate data and proportions of users per block forming a strategy for the management of a water resource requires reasonable knowledge of the effects that alterations in the control variables bring on water use such knowledge of the determinants influencing domestic water demand constitutes an essential ingredient of a pricing policy for domestic water supply special attention should be paid to the effects of the level shape and frequency of the tariff since these are the variables that can be altered by the policy maker

perception of price when price information is costly evidence from residential electricity demand a bstract residential electricity consumption is an example of a good for which it is costly to determine marginal price since price changes with the quantity purchased according to multistep block rate schedules this paper investigates the effect of the price information problem on consumers price perceptions an alternative hypothesis of average price perception is tested against the marginal price postulate which assumes wellinformed consumers the model which includes a price perception variable allows the estimation of the price to which consumers actually respond the empirical results support the hypothesis that consumers respond to average price perceived from the electricity bill

promoting fair competition in public procurement abstract if a government cares for local firms profit but not for foreign firms foreign firms will be discriminated against when competing for government procurement contracts foreign firms will be chosen less often and when chosen earn less profit than local firms we analyze a more central authority s policies against such discrimination given a situation in which a government has private information on product quality and the competing firms have private information on own costs necessary and sufficient conditions for free revelation of quality information are derived finally optimal policy when these conditions are not satisfied is characterized and discussed

price and income elasticities of residential water demand a meta analysis this article presents a meta analysis of variations in price and income elasticities of residential water demand meta analysis constitutes an adequate tool to synthesize research results by means of an analysis of the variation in empirical estimates reported in the literature we link the variation in estimated elasticities to differences in theoretical microeconomic choice approaches differences in spatial and temporal dynamics as well as differences in research design of the underlying studies the occurrence of increasing or decreasing block rate systems turns out to be important with respect to price elasticities the use of the discrete continuous choice approach is relevant in explaining observed differences

the value of free water analyzing south africa s free basic water policy this paper analyzes south africa s free basic water policy under which households receive a free water allowance equal to the world health organization s recommended minimum of 6 kiloliters per month i structurally estimate residential water demand evaluate the welfare eects of free water and provide optimal price schedules derived from a social planner s problem i use a unique dataset of monthly metered billing data for 60 000 households for 2002 2008 from a particularly disadvantaged suburb of pretoria the dataset contains rich price variation across 18 dierent nonlinear tarischedules and includes a policy experiment which removed the free allowance i nd that without government subsidy the mean monthly consumption would decrease from 12 6 to 5 6 kiloliters which is below the clean water consumption recommended by the who however it is possible to reallocate the current subsidy to form an optimal tari without a free allowance which would increase welfare while leaving the water provider s revenue unchanged this optimal tariwould also reduce the number of households consuming below the who recommended level

household responses to increased water rates during the california drought this paper explores the use of fixed effects and maximum likelihood techniques to es timate household responses to water price in creases during the california drought estimates are based on bimonthly meter readings from 599 single family households in the alameda county water district over the period 1982 1992 before and after the introduction of a steeply increasing block rate price structure i find that household and monthly fixed effects models are not success ful in modeling water demand with these data however maximum likelihood models that ex plicitly consider the household s response to the rate structure result in plausible estimates of wa ter demand jel q25

are price strategies effective in managing demand of high residential water users abstractencouraging water use efficiency and water conservation is one of the primary goals of water utility companies nationwide this study estimates price elasticity of residential water demand to measure the responsiveness of water use to price changes particularly for high water users household level water use data for high residential water users from central florida were analysed using 3 stage least square 3sls estimated price elasticity ranges between 0 07 and 0 14 this price elasticity estimate is below most of the estimates reported in the literature in absolute value the results imply that for price strategies to be effective in managing water demand of high residential water users a significant price increase would be needed overall this study highlights the importance of designing water conservation policies tailored to specific groups of customers and the importance of using these strategies effectively and fairly for different customer groups

aggregation and linearity in the provision of intertemporal incentives we consider the problem of providing incentives over time for an agent with constant absolute risk aversion the optimal compensation scheme is found to be a linear function of a vector of n accounts which count the number of times that each of the n kinds of observable events occurs the number n is independent of the number of time periods so the accounts may entail substantial aggregation in a continuous time version of the problem the agent controls the drift rate of a vector of accounts that is subject to frequent small random fluctuations the solution is as if the problem were the static one in which the agent controls only the mean of a multivariate normal distribution and the principal is constrained to use a linear compensation rule if the principal can observe only coarser linear aggregates such as revenues costs or profits the optimal compensation scheme is then a linear function of those aggregates the combination of exponential utility normal distributions and linear compensation schemes makes computations and comparative statics easy to do as we illustrate we interpret our linearity results as deriving in part from the richness of the agent s strategy space which makes it possible for the agent to undermine and exploit complicated nonlinear functions of the accounting aggregates

evidence on the specification of price in the study of domestic water demand the development of lakefront property in northern wisconsin has prompted in several towns minimum frontage zoning stricter than the state standard such zoning generates an economic loss by constraining development development effect and an economic

analysing rationing policies drought and its effects on urban users welfare analysing rationing policies during drought the aim of this paper is to study the impact on consumers of rationing policies implemented during water shortages water scarcity gives rise to the need for rationing and various methods including supply cutoffs can be used a model is devised to quantify the welfare losses associated with qualitive and quantitive restrictions based on virtual prices and using the consumer surplus as a welfare measurement welfare variations for different users have been calculated to achieve the aim information relative to seville spain has been used analysing the drought period that took place in the first half of the 1990s it has been possible to observe the main source that led to welfare losses for each kind of user

do residential water demand side management policies measure up an analysis of eight california water agencies abstract to assess the potential of price and alternative demand side management dsm policies as an urban water resource management tool an econometric model of residential demand is formulated and estimated this econometric model incorporates alternative dsm policy instruments such as water allocations use restrictions public education and increasing block pricing schedules the analysis relies on cross sectional monthly time series data for eight water agencies in california representing 24 of the state s population 7 1 million people results suggest that both price and alternative dsm policies were effective in reducing demand however the magnitude of the reduction in demand varied among policy instruments

auction design and favoritism abstract the theory of auctions has ignored the fact that often auction designers not the principal design auctions in a multi attribute auction the auction designer may bias his subjective evaluation of quality or distort the relative weights of the various attributes to favor a specific bidder an ancient concern in the procurement of weapons in the auctioning of government contracts and in the purchase of electricity by regulated power companies the paper analyzes the steps to be taken to reduce the possibility of favoritism it is first shown that in the absence of favoritism quality differentials among firms are more likely to be ignored if the auction designer has imperfect information about the firm s costs second if the auction designer may collude with only one bidder the other bidders should be chosen if they are at least as efficient as the former bidder and no hard information about quality differentials is released by the auction designer that would justify fair discrimination in favor of the former bidder last if the auction designer can collude with any bidder the optimal auction tends to a symmetric auction in which quality differentials are ignored the possibility of favoritism reduces the auction designer s discretion and makes the selection process focus on non manipulable monetary dimensions of bids

responsiveness to energy price changes when salience is high residential natural gas demand in ukraine abstract despite its importance for policy purposes evidence about the price elasticity of natural gas demand in the residential sector is very limited and based on inference from situations with modest variation in prices we focus on a locale and time when price changes were extreme and salient to consumers namely ukraine between 2013 and 2017 we exploit the tariff reforms and detailed micro level household consumption records to assess whether consumers adjust their consumption in response to the rate changes and estimate the price elasticity of the demand for natural gas to isolate behavior attention is restricted to those households that made no structural energy efficiency upgrades to their homes thus keeping the stock of gas using capital fixed we find that households are capable of reducing consumption even without installing insulation or making any other structural modifications to their homes the price elasticity is about 0 16 wealthier households people living in multifamily buildings and heavy users have more inelastic demands households reduced consumption even when they received government assistance this and the fact the demand is inelastic especially for wealthier households bode well for tariffs or energy tax schemes where wealthier households subsidize the consumption of the poorer ones

residential water demand in the northwest of spain a panel of monthly aggregate data from the northwest of spain is used to estimate domestic water demand functions under linear and non linear tariffs price billing climatic and sociodemographic variables are used as explanatory variables the use of intraannual data constitutes a relevant contribution in the european context overall marginal price elasticity estimates lie between 0 12 and 0 17 summer only elasticities and elasticities associated with uses beyond the effectively free allowances seem significantly higher climatic variables significantly affect monthly use although probably less than in other wealthier and drier areas domestic water use appears to be a normal good