general equilibrium modelling of the direct and indirect economic impacts of water quality improvements in the netherlands at national and river basin scale abstract the main objective of the study presented in this paper is to estimate the direct and indirect economic impacts of water quality policy scenarios in the netherlands focusing on the reduction of emission levels of nutrients and a number of eco toxicological substances for this purpose an applied general equilibrium age model consisting of 27 production sectors is extended to water through the inclusion of substitution elasticities between labour capital and emissions to water in the sectors production functions the macro economic costs of a 10 20 and 50 reduction of the emission levels in the year 2000 of ten priority substances in the eu water framework directive vary between 0 2 and 9 4 of net national income nni a large share of the total economic costs are borne by important sources of pollution like commercial shipping the chemical and metal industry however important spin off effects due to adaptation take place in the tertiary service sector besides the estimation of the economy wide impacts of water quality improvements the novelty of the study presented here is found in the downscaling of national and sector results to river basin level and the estimation of shadow prices for water polluting substances through the introduction of an emission permits market

intertemporal pricing and price discrimination a semiparametric hedonic analysis of the personal computer market we apply a smooth coefficient semiparametric model to a unique high frequency data set to examine the intertemporal pricing of personal computers furthermore we test whether firms charge differential component prices for their top performance personal computers and whether premium firms charge both a premium for all their computers and a premium for their top performance ones we find nonlinear effects in the pricing of personal computer components we also find that firms in general do not charge differential prices for the components of their top performance computers in addition high quality firms charge higher premia only for their most advanced products copyright 2006 john wiley sons ltd

externality correcting taxes and regulation externality correcting taxes and regulation in much of the literature on externalities taxes and direct regulation have been considered as alternative policy instruments both instruments might be imperfect in practice reflecting informational deficiencies and other limitations we analyse the use of taxes and regulation in combination to control externalities arising from individual consumption behaviour we consider the cases either where taxes are imperfectly differentiated to reflect individual differences in externalities or where some consumption escapes taxation in both cases we characterize the optimal instrument mix and we show how changing the level of direct regulation alters the optimal externality tax

the dual structure of incomplete demand systems integrability of incomplete demand systems is discussed the concepts of weak integrability quasi expenditure function quasi indirect utility function and quasi utility function are defined their relationships to the expenditure function indirect utility function and utility function are developed the dual structure of the quasi functions permits exact welfare analysis and reveals the conditional preference structure for the commodities of interest new results relating the uniqueness and exactness of consumer s surplus to the structure of the expenditure and indirect utility functions are obtained

semiparametric estimation and consumer demand this paper considers the implementation of semiparametric methods in the empirical analysis of consumer demand the application is to the estimation of the engel curve relationship and uses the british family expenditure survey household composition is modelled using an extended partially linear framework this is shown to provide a useful method for pooling non parametric engel curves across households of different demographic composition c 1998 john wiley sons ltd

mitigation of adverse effects on competitiveness and leakage of unilateral eu climate policy an assessment of policy instruments the european union eu has developed a strategy to mitigate climate change by cutting greenhouse gas ghg emissions and fostering low carbon technologies however the risk of implementing unilateral policies is that distortive effects are generated at the global scale affecting world energy prices international competitiveness and the geographical allocation of carbon intensive production processes using a dynamic cge model we assess the rate of carbon leakage and adverse impacts on competitiveness in a number of scenarios over the period 2010 2050 according to the model results we highlight two major issues first in the case of a unilateral eu climate policy carbon leakage and negative effects on competitiveness are quite serious anti leakage measures can only mitigate leakage and adverse economic impacts on competitiveness in a limited way on the contrary an optimality analysis addressing the environmental effectiveness cost effectiveness and political feasibility of alternative policy solutions reveals that the eu long term decarbonisation strategy by investing in energy efficiency and renewable energy might ensure protection of vulnerable manufacturing activities while enhancing the competitiveness of technologically advanced industries

utility functions and global regularity of fractional demand sytems fractional demand systems are utility derived demands having quantities or budget shares proportional to ag bf where g and f are functions of income and a and b vary across goods and are functions of prices many known demand systems that have large regular regions are fractional this paper derives the indirect utility functions that generate all fractional demand systems shows that these systems can all have large regular regions and provides sufficient conditions for their global or nearly global regularity an extension to rank three fractional demands is provided copyright 1995 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

upward bias in the consumer price index under the zero inflation economy abstract this study estimates the demand system using japanese microdata and calculates the cost of living index coli in the recent zero inflation situation the consumer price index cpi can approximate the coli while there are upward biases in the cpi during the 1980s

nesting the aids and translog demand systems this paper shows that there exists a relatively simple demand model that is consistent with utility maximization and has nested within it both the almost ideal demand system and translog models this model is exactly aggregated then estimated using aggregate u s demand data the results are used to test the relative adequacy of the almost ideal demand system and translog models copyright 1989 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

the engel curve for alcohol and the rank of demand systems this paper shows that the quadratic shape of the engel curve for alcohol is induced by preference heterogeneity between drinkers and abstainers in a japanese data set with controlling the heterogeneity it is shown that the engel curve for alcohol slopes monotonically downwards for drinkers and that the probability of being a drinker is an increasing function of total expenditure these two relationships generate a quadratic shape for the engel curve for alcohol other goods in this data set appear to have nearly linear engel curves so if the alcohol engel curve for drinkers is also linear then after controlling for this preference heterogeneity the rank of this demand system would be two copyright 2006 john wiley sons ltd

equivalence scales in a rank 3 demand system abstract in the context of a rank 3 demand system equivalence scales measuring the cost of demographic characteristics independently of the base utility level can be identified from cross section data without demographic separability restrictions although this can also be achieved with a rank 2 demand system that contains a nonlinear log expenditure term in its budget shares tests performed in a nested framework suggest that the rank 3 demand system approach is empirically superior the informative structure of the rank 3 demand system is used to estimate a detailed pattern of demographic costs including the cost of single parenthood and economies of scale within the family

the welfare impacts of an invasive species endogenous vs exogenous price models abstract the fixed prices models used to measure damages from invasive species typically overestimate financial impacts these fixed price assessments do not address key behavioral modifications that lower costs as people adapt by changing their mix of inputs and outputs given new economic circumstances using the invasive emerald ash borer agrilus planipennis in ohio as a motivating example we develop a computable general equilibrium model that accounts for these behavioral responses we estimate annual damages from the beetle to be about 70 million an order of magnitude less than the 400 900 million in damages estimated using a fixed price model damages are lower because people adapt through price and income adjustments that occur after ash trees are devastated from the emerald ash borer

duality theory for variable costs in joint production duality methods for incomplete systems of consumer demand equations are adapted to the dual structure of variable cost functions in joint production this allows identification of necessary and sufficient restrictions on technology and cost so that con ditional factor demands can be written as functions of input prices fixed inputs and cost these are observable when variable inputs are chosen and committed to production hence the identified restrictions allow ex ante conditional demands to be studied using observable data this class of production technologies is consistent with all von neu mann morgenstern utility functions when ex post production and or output prices are un certain

emissions taxes and abatement regulation under uncertainty we consider environmental regulation in a context where firms invest in abatement technology under conditions of uncertainty about subsequent abatement cost but can subsequently adjust output in the light of true marginal abatement cost where an emissions tax is the only available instrument policy faces a trade off between the incentive to invest in abatement technology and efficiency in subsequent output decisions more efficient outcomes can be achieved by supplementing the emissions tax with direct regulation of abatement technology or by combining the tax with an abatement technology investment subsidy we compare the properties of these alternative instrument combinations

economic valuation of the vulnerability of world agriculture confronted with pollinator decline there is mounting evidence of pollinator decline all over the world and consequences in many agricultural areas could be significant we assessed these consequences by measuring 1 the contribution of insect pollination to the world agricultural output economic value and 2 the vulnerability of world agriculture in the face of pollinator decline we used a bioeconomic approach which integrated the production dependence ratio on pollinators for the 100 crops used directly for human food worldwide as listed by fao the total economic value of pollination worldwide amounted to 153 billion which represented 9 5 of the value of the world agricultural production used for human food in 2005 in terms of welfare the consumer surplus loss was estimated between 190 and 310 billion based upon average price elasticities of 1 5 to 0 8 respectively vegetables and fruits were the leading crop categories in value of insect pollination with about 50 billion each followed by edible oil crops stimulants nuts and spices the production value of a ton of the crop categories that do not depend on insect pollination averaged 151 while that of those that are pollinator dependent averaged 761 the vulnerability ratio was calculated for each crop category at the regional and world scales as the ratio between the economic value of pollination and the current total crop value this ratio varied considerably among crop categories and there was a positive correlation between the rate of vulnerability to pollinators decline of a crop category and its value per production unit looking at the capacity to nourish the world population after pollinator loss the production of 3 crop categories namely fruits vegetables and stimulants will clearly be below the current consumption level at the world scale and even more so for certain regions like europe yet although our valuation clearly demonstrates the economic importance of insect pollinators it cannot be considered as a scenario since it does not take into account the strategic responses of the markets

bio economic modeling of water quality improvements using a dynamic applied general equilibrium approach an integrated bio economic model is developed to assess the impacts of pollution reduction policies on water quality and the economy emission levels of economic activities to water are determined based on existing environmental accounts these emission levels are built into a dynamic economic model for the dutch economy and subsequently coupled to a national water quality model the modular approach has the advantage that the impacts on the economy and water quality are evaluated simultaneously but each within their own domain based on the appropriate scale and level of detail the dynamic nature of the economic model allows us to also evaluate a derogated water policy as foreseen in the european water framework directive the indirect costs of different water quality improvement policy scenarios are at least as high as the direct costs related to investments in pollution abatement technology the stricter the policy scenario the more important the role of economic adjustment and restructuring mechanisms at the macro economic level significant water quality improvements can be achieved through stringent domestic emission reductions however reaching water quality standards is highly dependent on water quality improvement policy in surrounding river basin countries and climate change

irreversible abatement investment under cost uncertainties tradable emission permits and emissions charges abstract a major concern with tradable emission permits is that stochastic permit prices may reduce a firm s incentive to invest in abatement capital or technologies relative to other policies such as a fixed emissions charge however under efficient permit trading the permit price uncertainty is caused by abatement cost uncertainties which affect investment under both permit and charge policies we develop a rational expectations general equilibrium model of permit trading and irreversible abatement investment to show how cost uncertainties affect investment under permits we compare the resulting investment incentive with that under charges after controlling for the assumption that random shocks affect the abatement cost linearly we find that firms investment incentive decreases in cost uncertainties but more so under emissions charges than under permits therefore tradable permits in fact may help maintain firms investment incentive under uncertainty

non joint technologies the hypothesis of non jointness in input quantities separate production functions is well known and it plays an important role in many areas of economics in this paper we define three additional forms of non jointness which have received little or no attention in the literature and which might be relevant for the firm as well as for the representation of the aggregate technology we characterize all forms of non jointness in terms of variable profit and joint cost functions this yields a number of restrictions which are all testable empirically the assumption that production is non joint in input quantities separate production functions inputs allocated between the different production processes plays a crucial role in many areas of economic theory we need only think of international trade theory public finance macroeconomics growth theory or traded non traded good models of international finance in fact it is safe to say that more often than not production is assumed non joint in input quantities in multiple output models little work has been done to test the empirical validity of the assumption of non jointness in input quantities samuelson 1966 studies the characterization of non joint technologies in terms of the transformation function as pointed out by hall 1973 however samuelson s results do not seem very useful for econometric work hall studies the characterization of non jointness in input quantities in terms of the joint cost function this leads to a number of restrictions which can easily be imposed or tested for and which were used in empirical work by burgess 1976 and by kohli 1981 lau 1972 1978 finally characterizes non jointness in input quantities in terms of the profit function besides non jointness in input quantities lau also examines the case of non jointness in output quantities when an input can be cracked into several outputs in this paper we define two additional cases of non jointness and we characterize them in terms of the joint cost function and the variable or normalized restricted profit function the new forms of non jointness that we define may be useful to describe technologies at the level of the firm and may be even more so at the aggregate level some may be useful concepts in other areas of economics as well such as consumer theory by distinguishing between the various forms of non jointness one obtains a number of testable restrictions on the corresponding joint cost or variable profit functions

exact consumer s surplus and deadweight loss consumer s surplus is a widely used tool in applied welfare economics both economic theorists and cost benefit analysis often use consumer s surplus despite its somewhat dubious reputation the basic idea is to evaluate the value to a consumer or his willingness to pay for a change in price of a good from say pricep to pricep because price changes affect consumer welfare an evaluation of this effect is often a key input to public policy decisions yet consumer s surplus is probably the most controversial of widely used economic concepts both paul samuelson and ian little conclude that the economics profession would be better off without it it is my feeling of the situation that substantial agreement exists on the correct quantities to be measured the amount the consumer would pay or would need to be paid to be just as well off after the price change as he was before the price change the quantities correspond to john hicks compensating variation measures an alternative measure which takes ex post price change utility as the basis of comparison is hicks equivalent variation the controversy arises in the measurement of these quantities the usual measurement procedure is to use the area to the left of the marshallian market demand curve between two price levels jules dupuit originated this measure of welfare change and alfred marshall and hicks derived appropriate conditions for its use the primary condition for the area to the left of the demand curve to correspond to the compensating variation is to have constant marginal utility of income marshall gave this condition and if it holds the same quantity will be derived as the area to the left of the compensated hicksian demand curve this area to the left of the compensated demand curve is exactly what the compensating variation and equivalent variation measure thus the constant marginal utility of income is a sufficient condition for marshallian consumer s surplus to be equal to hicks consumer s surplus in this case arnold harberger s plea to use the welfare triangle as one half times the product of the price change times the quantity change to measure deadweight loss corresponds to the correct theoretical amount of welfare change in a recent paper robert willig derives bounds for the percentage difference between the correct measure of either the compensating or equivalent variation and the marshallian measure derived form the market demand curve his bounds which depend on the income elasticity of demand for the single good in the region of price change being considered as well as the proportion of the consumer s income spent on the good demonstrate that the marshallian consumer s surplus is often a good approximation to hicks consumer s surplus the fact that the proportion of the consumer s income spent matters as well as the income elasticity was first pointed out by harold hotelling willig contends that the approximation error will be less than the errors involved in estimating the demand curve thus he hopes to remove the need for apology that applied economists often need to give to theorists who remark on the inappropriateness of using marshallian consumer s surplus to measure welfare change however in this paper i show that for the case primarily considered by willig of a single price change which is also the situation in which consumer s surplus is often used in applied work no approximation is necessary professor of economics massachusetts institute of technology and research associate national bureau of economic research i would like to thank peter diamond erwin diewert daniel mcfadden robert merton robert solow hal varian joel yellin and the referees for help and comments research support from the national science foundation is acknowledged the reason that we still have two rather than one of samuelson s six measures of consumer s surplus arises from an index number problem of the correct basis for the welfare comparison i will give both measures but plan to concentrate on the compensating variation

estimates of the black economy based on consumer demand approaches we propose a consumer demand system approach to estimating the size of the black economy where alternative hypotheses affecting the empirical results can be tested in a nested framework this approach allows for the estimation of the under reporting of household income from various sources dispensing with the need to use arbitrary criteria to classify households by their main source of income it also avoids potential bias in black economy estimates arising from mistaking preference heterogeneity substitution as income effects we illustrate these arguments by estimating the extent to which self employment income in the uk is underreported using parametric and nonparametric techniques the black economy broadly defined as the economic activities that are hidden from public authorities to avoid taxation has recently received increased attention in the literature due to arguments that the rising tax burden and state regulation is driving economic activity underground tanzi and schuknecht 1997 enste and schneider 1998 the usefulness of attempts to estimate the size of the black economy however is a controversial issue the sceptics emphasise the difficulties associated with the precise definition of black economy activities and point to the widely different estimates of the size of these activities resulting from alternative methods dixon 1999 tanzi 1999 thomas 1999 authors approaching the subject in an optimistic frame of mind emphasise positive aspects of estimating the size of the black economy such as the correct measurement of gdp and other macroeconomic variables e g employment and the design of policy and econometric models bhattacharyya 1999 giles 1999 the controversy on estimation issues however does not subtract from the widespread concern about the undesired consequences of the black economy undeclared economic activities reduce the tax base thereby undermining the financing of public goods and social protection a country trying to curtail the loss of tax revenue by raising tax rates can create a vicious cycle as this reinforces the incentive not to declare economic activities to the public authorities high tax rates have a distorting effect resulting in inefficient allocation of resources due to unequal opportunities and willingness to evade in different sectors of the economy and can undermine the ability of the country to compete internationally distortions in the labour market can also arise because individuals working in the black economy may have difficulty in moving from one job to another furthermore in countries where health pension and other social security payments are not universal individuals working in the black economy and their families are outside the

age effects on consumer demand an additive partially linear regression model an additive partially linear regression model is used to estimate non parametrically the effects of total expenditure and age in the context of engel curves and to investigate the specification and welfare interpretation of the age effects in parametric models of consumer behaviour empirical analysis based on data drawn from the u k family expenditure survey shows that modelling of the effects of age requires a more sophisticated approach than that generally adopted in parametric demand analysis it also shows that failing to adequately capture these effects can have misleading welfare implications jel classification c14 d12 l effet de l ge sur la demande des consommateurs un modele de regression additif partiellement lineaire on utilise un modele de regression additif partiellement lineaire pour faire la calibration non parametrique des effets de la depense totale et de l ge dans le contexte de courbes de engel et pour enqueter sur la specification des effets d ge et leur interpretation en termes de bien etre dans des modeles parametriques de comportements du consommateur l analyse empirique est construite sur des donnees de la u k family expenditures survey et montre que la modelisation des effets de l ge reclame une approche plus sophistiquee que celle qui est generalement utilisee dans l analyse parametrique de la demande on montre aussi que le manque a bien saisir ces effets peut conduire a des conclusions fausses pour ce qui est du niveau de bien etre

price volatility and risk exposure on market based environmental policy instruments abstract we explore the efficacy of price and quantity controls as environmental policy instruments in a stochastic setting in which agents are risk averse we demonstrate that the assumption of risk aversion may improve the performance of a tax relative to that of a system of tradable quotas and that restricting quota trade may enhance efficiency even though risk aversion in itself limits volumes of trade the government may be able to improve the performance of a tradable quota system by judicious choice of distribution and amount of initial quotas and by trading pro actively in the quota market

the macroeconomic cost of catastrophic pollinator declines we develop a computable general equilibrium cge approach to assess the macroeconomic impacts of productivity shocks due to catastrophic losses of pollination ecosystem services at global and regional scales in most regions producers of pollinator dependent crops end up benefiting because direct output losses are outweighed by increased prices while non agricultural sectors experience large adverse indirect impacts resulting in overall losses whose magnitudes vary substantially by comparison partial equilibrium analyses tend to overstate the costs to agricultural producers understate aggregate economy wide losses and overstate the impacts on consumers welfare our results suggest an upper bound on global willingness to pay for agricultural pollination services of 127 152 billion

the demand for gasoline evidence from household survey data summary in this paper we investigate the demand for gasoline in canada using recent annual expenditure data from the canadian survey of household spending over a 13 year period from 1997 to 2009 on three expenditure categories in the transportation sector gasoline local transportation and intercity transportation in doing so we use three of the most widely used locally flexible functional forms the almost ideal demand system aids of deaton and muellbauer 1980 the quadratic aids quaids of banks et al 1997 an extension of the simple aids model that can generate quadratic engel curves and the minflex laurent model of barnett 1983 which can also generate quadratic engel curves we pay explicit attention to economic regularity argue that unless regularity is attained by luck flexible functional forms should always be estimated subject to regularity as suggested by barnett 2002 and impose local curvature to produce inference consistent with neoclassical microeconomic theory our findings indicate that the curvature constrained minflex laurent model is the only model that is able to provide theoretically consistent estimates of the canadian demand for gasoline our estimates show that the own price elasticity for gasoline demand in canada is between 0 738 and 0 570 less elastic than previously reported in the literature copyright 2013 john wiley sons ltd

nesting quadratic logarithmic demand systems abstract we propose a new generalised rank 3 demand system which nests all known and new rank 3 and rank 2 demand systems derived from the quadratic logarithmic ql cost function we investigate its statistical adequacy against commonly encountered alternatives using uk household data

on estimating the cost of characteristics indices from consumer demand analysis we examine the information content of relative equivalence scales using a multiperiod framework and argue that in the absence of independence of base ib these scales can be uniquely identified from demand analysis only when the transformations of preferences through time are the same for all household types a property termed as intertemporally invariant base iib utility restrictions imposed by iib on conditional demands are tested empirically and found rejected within the context of a rank 3 demand system applied to individual household data drawn from the u k family expenditure survey 1970 86 welfare implications of false iib assumptions are also empirically investigated jel classification d1 a propos de l estimation du cout des indices caracteristiques a partir de l analyse de la demande des consommateur ce memoire examine le contenu informationnel des echelles d equivalence relative en utilisant un cadre d analyse sur plusieurs periodes et suggere que en l absence d une independance de la base ib ces echelles peuvent etre identifiees d une maniere univoque seulement si les transformations de preferences dans le temps sont les memes pour tous les types de menages on nomme cette propriete utilite de base invariante dans le temps iib les restrictions verifiables imposees par iib sur les demandes conditionnelles sont verifiees empiriquement et sont rejetees dans le contexte d un systeme de demande de rang 3 applique aux donnees des menages individuels dans une etude des depenses des menages de la grande bretagne 1970 86 les implications de faux postulats iib sont analysees empiriquement

homogeneity and supply supply functions in the ubiquitous gorman class are examined for their homogeneity properties homogeneity places surprisingly strong restrictions on functional forms these forms facilitate testing of aggregability given homogeneity or homogeneity given aggregability or testing both

estimation of multicrop production functions this paper considers whether separability or nonjointness is the better approach for attaining tractability for multicrop production function estimation characteristics of agricultural production associated with allocated inputs physical constraints and output determination imply sufficient nonjointness for estimation whereas separability is less plausible the paper also addresses estimation of production functions with allocated inputs where allocations are not observed and demonstrates a proposed approach by way of example

household equivalence scales and welfare comparisons abstract the ratio of cost functions of different households facing the same prices and attaining the same utility level is a true cost of demographic characteristics index this index is independent of a base level of income or utility ib if and only if it equals a ratio of household equivalence scales that are themselves ib applied cost index and equivalence scales specifications are usually ib this paper describes the general restrictions on cost functions and social welfare functions required for ib scales and for their use in welfare analysis

evaluating policy interventions with general equilibrium externalities abstract we report on the results of analytical and numerical models that describe the effects of non separable externalities or public goods on public policies with important general equilibrium consequences in the numerical exercise we calibrate a general equilibrium model with non separable air quality benefits in order to measure the excess burden and total net benefits of transportation and energy taxes in the 1995 u s economy the change in the physical level and the economic value in air quality associated with a given policy is a function of the substitution patterns between air quality and market goods that we assume the size of the deadweight loss due to pre existing distortions such as a tax on labor income is substantially affected by these substitution patterns

a rational rank four demand system past parametric tests of demand system rank employed polynomial engel curve systems however by gorman s 1981 theorem the maximum possible rank of a utility derived polynomial demand system is three the present paper proposes a class of demand systems that are utility derived are close to polynomial and have rank four these systems nest rational polynomial demands and so can be used to test ranks up to four these systems are suitable for applications where high rank is likely such as demand systems involving a large number of goods a test of rank using this new class of systems is applied to uk consumer demand data

cost functions under production uncertainty we characterize the cost functions which would be consistent with expected utility maximization when production is uncertain it is not generally possible assuming risk aversion to use only expected output as the constraint in a cost minimization problem in some leading cases cost functions consistent with expected utility maximization are particularly useful because they are devoid of risk preferences

estimates of semiparametric equivalence scales within the semiparametric framework introduced by pendakur 1999 we introduce a new loss function to estimate equivalence scales this loss function uses all available information from the total expenditures of both the reference and nonreference households and as such it produces more reliable estimates using canadian family expenditure data for 1996 we apply this loss function to obtain equivalence scale estimates for a variety of expenditure share categories such as food fuel and clothing copyright 2006 john wiley sons ltd

testing the rank of engel curves with endogenous expenditure abstract we find that the endogeneity of consumer expenditure tends to increase the estimated rank of engel curves this result based on nonparametric procedure is in line with previous results obtained in the context of parametric specifications

multiproduct cost relationships for retail fertilizer plants volume cost relationships developed from the statistical analysis of accounting data have long provided useful information for evaluating firm efficiency french previous descriptive and statistical analyses of accounting data as well as economic engineering cost studies of retail fertilizer firms have focused on a single product line anderson and miller raikes and heubrock williams foster and simpson service o rourke or have simply summarized industry accounting data akridge and downey problems associated with using accounting data to estimate statistical cost functions include a the failure to handle satisfactorily multiproduct firm cost relationships

cost of characteristics indices and household equivalence scales abstract the ratio of cost functions of demographically different households is a true cost of demographic characteristics index this index is independent of a base level of income or utility ib if and only if it equals a ratio of household equivalence scales that are themselves ib this paper analyzes the restrictions on cost functions and commodity specific equivalence scales required for the existence of ib scales and indices since scales can be price dependent the restrictions on behavior are far less severe than for ordinary engel style household scales connections between ib scales and other techniques for incorporating demographic effects into demand systems are described

linear demand functions in theory and practice abstract integrability conditions for an incomplete system of linear demand functions are considered the parameter restrictions consistent with integrability are identified and the structure of the conditional preference map is obtained it is found that the conditional preferences for a set of linear demand functions are either quadratic or leontief from a translated origin welfare analysis with linear demand models is also considered

integrability of incomplete systems of demand functions the problem of integrating back from an incomplete set of demand functions to a utility function is considered conditions permitting local integrability are analogous to those which arise in local integrability theorems for complete systems but the analysis of the global integrability of incomplete systems differs markedly from that of complete systems

what do we learn about consumer demand patterns from micro data the aim of this paper is to assess the importance of using micro level data in the econometric analysis of consumer demand to do this we utilize a time series of repeated cross sections covering some 4 000 households in each of 15 years employing a number of different aggregation procedures we conclude that aggregate data alone are unlikely to produce reliable estimates of structural price and income coefficients however once certain aggregation factors as well as trend and seasonal components are included an aggregate model is not necessarily outperformed across all demand equations in terms of forecasting ability jel d12 c52 c31 the purpose of this paper is to develop a complete consumer demand system based on a time series of individual household data and to use it to measure the biases introduced into the study of consumer de mand behavior when aggregate data are used in place of the appropriate microeco nomic data we assess the suitability of ag gregate data through the impact on income and price elasticities and by evaluating the ability of both micro and aggregate based models to forecast aggregate consumer de mand the biases introduced by the use of aggregate data depend upon the way that household characteristics interact with in come and price effects and on departures of demand systems from linearity we explore the structure of microeconomic demand sys tems and the role of household characteris tics in the behavior of consumer demand both for the light this may shed on the pattern of future demands and for the im plications this behavior has for issues of aggregation consumer demand patterns typically found in micro data sets vary considerably across households with different household characteristics and with different levels of income we model this variability by making intercept and slope parameters in the budget share equations of our demand sys tem depend on household characteristics and by allowing for nonlinear total log expenditure terms in fact in theory consistent demand systems it is total ex penditure rather than disposable income that is allocated across goods we find that this general framework leads to a well specified data coherent demand system which is a quadratic extension of the popu lar almost ideal model of angus s deaton and john muellbauer 1980 the micro level estimates are shown to be sensitive to the treatment of endogeneity of total expen diture and to the specification of interaction terms with household characteristics in ad dition this specification is also shown to possess many attractive features for the evaluation of aggregate models

preference heterogeneity and the rank of demand systems this article examines the effect of preference heterogeneity on nonparametric and parametric tests of the rank of demand systems using samples of households drawn from the u k family expenditure survey we find that preference heterogeneity increases the rank of demand systems when the effects of household characteristics on demand are removed by semiparametric techniques a rank 3 demand system appears to be an adequate empirical specification for all samples

quadratic engel curves and consumer demand this paper presents a model of consumer demand that is consistent with the observed expenditure patterns of individual consumers in a long time series of expenditure surveys and is also able to provide a detailed welfare analysis of shifts in relative prices a nonparametric analysis of consumer expenditure patterns suggests that engel curves require quadratic terms in the logarithm of expenditure while popular models of demand such as the translog or the almost ideal demand systems do allow flexible price responses within a theoretically coherent structure they have expenditure share engel curves that are linear in the logarithm of total expenditure we derive the complete class of integrable quadratic logarithmic expenditure share systems a specification from this class is estimated on a large pooled data set of u k households models that fail to account for engel curvature are found ro generate important distortions in the patterns of welfare losses associated with a tax increase

environmental defensive expenditures and households behaviour in italy the paper explores the role of environmental defensive expenditures in the consumption behaviour of italian households environmental defensive expenditures are not borne to increase households welfare but to prevent or avoid the effects of a worsening environmental quality the literature on environmental accounting argues that economic growth in industrialized countries is accompanied by an increasing load of defensive activities that may lead to a reorientation of consumption behaviour in this work this hypothesis is tested using annual data on mean consumption expenditures of italian households from 1985 to 1996 a complete system of demand is estimated and short run price elasticities of demand for defensive expenditures are calculated the complete system of demand functions is specified using the quadratic almost ideal demand system proposed by banks blundell and lewbel results show that there is very low substitution between the demand for the six aggregate goods in which total expenditure is