the measurement and trend of inequality comment in a recent article in this review morton paglin proposes a measure of concentration which he claims will correct the gini ratio for overstatement in populations where each individual may be expected to vary his income or wealth over his life cycle the paglin measure suggests that the gini ratio overstates income concentration in the united states by a third and does not reveal a 23 percent decline in concentration which has occurred between 1947 and 1972 these results are based on an improper decomposition of the gini ratio in this note i decompose the gini ratio to derive the paglin measure it is shown to correct for neither demographic nor life cycle income effects and to understate intracohort income or wealth inequality if properly normalized the paglin measure shows that the gini overstates u s income concentration by 7 percent or less and indicates a decline in u s interfamily income concentration of less than 12 percent four percentage points of this decline are the result of demographic change while less than 7 points comparable to the 5 percent decline of the gini are the result of decreased income concentration within cohorts of family heads decomposition further reveals major changes in the division of income among cohorts and in concentration of income within cohorts these changes compensate each other in the paglin measure the use of which as a measure of income or wealth concentration is not recommended the gini concentration ratio

agents evaluations and the disparity in measures of economic loss abstract recent studies have revealed a large and unexpected disparity between willingness to pay and compensation demanded measures of economic loss further evidence of this difference is presented here together with the results of a series of survey and real money exchange experiments which indicate that when advisors evaluate entitlements on behalf of third parties the variation between the measures is far less than is shown by individuals acting on their own behalf given the wide dependence on agents a finding that they may weigh losses differently from people they act for suggests that agents choices may compromise welfare positions

a review of wta wtp studies abstract willingness to accept wta is usually substantially higher than willingness to pay wtp these constructs have been studied for roughly 30 years and with a wide variety of goods this paper reviews those studies we find that the less the good is like an ordinary market good the higher is the ratio the ratio is highest for non market goods next highest for ordinary private goods and lowest for experiments involving forms of money a generalization of this pattern holds even when we account for differences in survey design ordinary goods have lower ratios than non ordinary ones we also find that ratios in real experiments are not significantly different from hypothetical experiments and that incentive compatible elicitation yields higher ratios

optimal insurance in incomplete markets this paper examines the theory of optimal insurance purchasing in the presence of uninsurable background risk existing theorems concerning the optimal level of insurance and the optimal form of an insurance contract are shown to hold only under restricted market and risk assumptions in particular conditions sufficient for the optimality of full coverage or sufficient for the optimality of deductible policies depend on the correlation between insurable and uninsurable risks these results may provide a partial explanation why existing theory is often contradicted by observable behavior

paired comparison and contingent valuation approaches to morbidity risk valuation abstract this research uses an experimental approach for eliciting consumer valuations of morbidity risk reductions associated with safter chemical products and introduces the paired comparison questions approach to non market valuation in four applications the paired comparisons approach yields higher morbidity valuations than the more familiar contingent valuation approach however both methodologies produce large values of morbidity reduction benefits in comparison to estimates derived from wage hedonic studies explanations for the difference in the estimates and their magnitudes are suggested along with the public policy implications

measuring values for environmental resources under uncertainty abstract the relationship between conventional hicksian measures of the benefits from changes in environmental amenities under certainty and corresponding measures of valuation when the conditions of access to an uncertain environmental resource are changed is considered the analysis utilizes a contingent commodity framework with the assumption of state dependent preferences the findings suggest that the valuation of these changes will depend upon the availability of fair markets for diversifying risk moreover conventional measures of compensating or equivalent surplus will not necessarily bound the individual s valuation of a change in access to an uncertain environmental resource

ex ante consumer welfare evaluation in cost benefit analysis abstract public projects and policies are normally evaluated ex ante i e while consumers may still be uncertain about future prices income levels interest rates and preferences this paper extends the theory of ex ante consumer welfare evaluation by developing a 2 period model with multiple sources of uncertainty it provides insights into the influence of temporal uncertainty on the empirical measurement of ex ante willingness to pay

the price elasticity of mass preferences i compare the price elasticity of economic and political preferences my central hypothesis is that willingness to pay whether expressed verbally or through cash transactions is more price elastic for economic consumption goods than for public goods i find that increases in price greatly diminish the proportion of people willing to pay for consumer goods such as housing or hardback books whereas the proportion willing to pay more in taxes to support a public good such as environmental protection or shelter for the homeless is much less responsive to changes in price i conclude by discussing the theoretical and political implications of willingness to pay for public and private goods

valuing non market goods using contingent valuation abstract contingent valuation is a technique being developed by economists for the valuation of environmental commodities not traded in markets this paper discusses the major problem areas associated with this method of value estimation these comprise bias strategic hypothetical and design biases the discrepancy between willingness to pay and compensation demanded the aggregation procedure the choice of question format and non use values some evidence from comparative studies is reported and comments made on the accuracy of contingent valuation answers finally the conditions under which contingent valuation seems to operate best are set out

non insurance markets loss size manipulation and competition experimental evidence the common view that buyer power of insurers may effectively counteract provider market power critically rests on the idea that consumers and insurers have a joint interest in extracting price concessions however in markets where the buyer is an insurer the interests of insurers and consumers to reduce prices may be importantly misaligned the positive dependence between loss size and the insurer s expected profits limits the insurer s incentives to reign in loss sizes in markets with small initial loss sizes insurers may try to raise these in order to create demand for insurance after having defined insurance and non insurance markets based on the initial loss size we develop theory to show that insurers with buyer power have incentives to create insurance markets insurer competition will push their profits to zero but markets do not return to the initial non insurance state this constitutes a welfare loss we design experimental insurance markets to test our theory and find support monopolistic insurer subjects in non insurance markets increase loss sizes to establish insurance markets insurer competition eliminates profits but not the loss size to uninsured consumers this provides an additional reason to be careful in granting insurers buyer power jel classification c92 d81 g22 i11 l13

valuing environmental commodities some recent experiments a general model of consumer behavior is proposed to assess six recent experiments that have attempted to reveal preferences for environmental goals each experiment used a mix of both the techniques and the theory of demand for non market commodities and each was designed to estimate a non market attitude associated with the environment and to analyze potential biases in the techniques the six cases show some consistency in results the linkage within the contingent market between the environmental attribute institutional setting and the bidding instrument must be realistic and accepted by the respondent to avoid biased results possibly the most important result is the replication of results using a traditional property value study and a contingent bidding approach all evidence obtained to date suggests that hedonic studies of property values or wages travel costs and survey techniques all yield values well one order of magnitude in accuracy 41 references 2 tables

pricing policies and antlerless elk hunting permits one of the effects of increasing emphasis on leisure time in the u s has been a growth in demand for hunting privileges an example of such growth is the rapidly increasing demand for the opportunity to hunt elk in various western states potter 1982 from 1960 1979 the number of licensed elk hunters more than doubled in north america while average elk hunter success steadily declined from 25 to 14 over the same period even though total elk harvests are increasing elk populations are not growing at a rate anywhere near that of current demand growth thus state fish and wildlife departments must utilize methods to allocate elk resources such allocation procedures include split seasons waiting lines drawings and fee increases each with distinct efficiency and equity implications meyer 1979 peek pederson and thomas 1982 the problem of allocating rocky mountain antlerless elk hunting privileges in eastern oregon is instructive in this regard oregon s department of fish and wildlife controls the hunt of antlerless cow and calf elk by controlling the numbers of hunting tags annually issued for each designated geographic area the numbers of tags issued are determined by estimating the quantity of hunters needed to achieve the target harvest level of antlerless elk in each area for a one dollar processing fee prospective hunters may indicate a first and a second choice hunting area from

information effects in contingent markets information bias in contingent markets is poorly understood in this paper testable hypotheses concerning beneficial contingent market information effects are developed conceptually perspective information and relative expenditure information were expected to increase comprehension and increase bids provision cost information was expected to counteract free riding behavior and also increase bids hypothesis tests using experimental markets suggested that each information type induced small statistically insignificant bid increases however the combined effect of the three information types induced a desirable statistically significant increase in bids this result supports the contention that not all contingent market information effects are biases

effect of distance on the preservation value of water quality in the past dozen years an extensive body of literature has developed on the willingness to pay for water quality in particular its recreation use and nonuse preservation values this paper illustrates a procedure for estimating the effect of distance on the preservation value of environmental quality using the contingent valuation approach the case considered is the potential degradation of water quality due to coal mining activity in the flathead river drainage system montana the analysis supports a negative association for this particular study area the effect of distance on preservation value was considered both directly and indirectly through its effect on visits 36 references 2 tables

multiple measurements of u s income inequality using 1980 state census data the gini ratio theil index coefficient of variation atkinson measure four values and nelson index as separate measurements of income inequality are regressed with nineteen ses variables traditionally found significant with gini in past research the standard deviation of educational attainment is dominant among all independent variables as the strongest predictor of inequality mean family income dominant in prior research is a distant second in predictiveness more diversity than commonality is evident among the nineteen ses variables as they predict income inequality measured by the eight different techniques copyright 1988 by mit press

valuing amenity resources under uncertainty does the existence of fair contingent claims markets matter abstract alternative welfare measures are evaluated as measures of the value of change in access conditions for environmental resources and it is shown that traditional hicksian surplus estimates systematically underestimate benefits it is further argued that the existence of fair contingent claims markets is a peripheral consideration in benefit estimation that state dependent payments present no significant collection obstacles not already encountered in state independent payment schemes and that risk neutral social decision making requires state dependent benefit measures for situations involving individual risk these findings imply that future research should focus on developing theoretical bounds between the expected value of state dependent benefit measures and conventional measures and that contingent valuations techniques need to be extended to measure contingent payment possibilities for changes in uncertain access conditions to environmental resources

derived demand estimation with survey experiments commercial electric vehicles in this paper the author examines the demand for a hypothetical input electric over the road vehicles in the commercial sector using data from a survey experiment this experiment is designed to allow the estimation of theoretically plausible derived demand functions from either the translog or the ces production functions a heteroscedasticity corrected two limit tobit model is developed and estimated the results provide evidence of considerable adaptability to new technologies and price structures on the part of firms they evidently would be willing to cope with the limited traveling range of electric vehicles if these vehicles were able to provide a less costly means of doing business copyright 1987 by mit press

willingness to pay the risk premium and risk aversion abstract in this paper we compare the properties of two concepts that are often used to value risk transformations the willingness to pay w t p and the risk premium we show that in contrast to a widespread belief some properties of the risk premium are not shared by w t p

three paradigms for the role of capitalization requirements in insured financial institutions standard models for deposit insurance strike analogies to more familiar financial contracts and conceive of risk as exogenous the oldest model of deposit insurance likens it to passively underwriting casualty insurance a more sophisticated but still bilateral model likens deposit insurance to writing a passive put option on the enterprise whose funding is insured delays in acknowledging the wreck of the s l industry and its federal insurer fslic discredit these models as guides to managing a deposit insurance fund deposit insurance is better interpreted as a trilateral performance bond that enhances the credit of an insured institution this interpretation endogenizes risk emphasizes incentive conflict and underscores the need to optimize loss control activity the bonding model clarifies that a subset of the monitoring and disciplinary activities traditionally undertaken by government officials can usefully be privatized

to each the same and to each his own a proposal to measure responsibility sensitive income inequality this paper deals with the question of how to incorporate modern responsibility catering egalitarianism into economic theory on the measurement of income inequality i present a particular axiomatic expression of the main aspects of such egalitarianism then to measure offensive inequality separately i construct a norm or reference income distribution based upon the axiomatic model to replace the perfectly equal income distribution that is used as norm by all common inequality measures i defend the use of a particular measure of distributional change to determine the degree of offensive inequality and apply the method to belgian income data

using contingent valuation to value environmental improvements alternative methods available to economists for valuing non market goods are outlined contingent valuation is then used to value a ban on straw burning

valuing public goods a comparison of survey and hedonic approaches although the theory of public goods has progressed rapidly since paul samuelson s seminal article the empirical measurement of the value of demand for public goods only recently has received increased attention perhaps the best known and most widely accepted empirical approach has been the use of hedonic prices wherein for example it is assumed that either wages or housing values reflect spatial variation in public good characteristics of different communities this indirect approach based on theoretical work of charles tiebout kelvin lancaster sherwin rosen and others has proven quite successful among public goods or bads which have been valued using the hedonic approach are climate i hoch air pollution robert anderson and thomas crocker d harrison and d rubinfeld social infrastructure r cummings et al and other community characteristics such as noise level j nelson and ethnic composition ann schnare an alternative approach is to directly ask households or individuals to state their willingness to pay for public goods using survey techniques despite arguments that strategic bias will invalidate survey results there exists the need for an alternative to the hedonic approach as an example consider the case of a remote and unique scenic vista valuable to recreators which is threatened by air pollution from a proposed coal fired plant a typical situation in the western united states although it is possible in principle to impute the value of clean air and visibility from the relative decline in local visitation which might follow construction of a power plant information on the value of visibility at the site is needed prior to construction for socially optimal decision making on plant location and pollution control equipment the hedonic approach is unavailable both because the scarcity of local population as opposed to recreators makes use of wage or property value data impossible and because scenic vistas may themselves be unique for these reasons a randall et al first applied survey methods for valuing visibility and other environmental effects of large coal fired power plants in the four corners region of new mexico since this initial application the survey approach has been widely used to value environmental commodities where market data for hedonic analysis is difficult to acquire see for example brookshire ives and schulze rowe et al brookshire et al other early attempts to value public goods using the survey approach include r davis peter bohm and j hammack and g brown although results of using the survey approach for estimating the value of public goods appear to be internally consistent replicable and consistent with demand theory see schulze et al little work on external validation has been reported thus the purpose of this paper is to report on an experiment designed to validate the survey approach by direct comparison to a hedonic property value study the los angeles metropolitan area was chosen for the experiment because of the well defined air pollution problem and be assistant professor university of wyoming assistant professor university of missouri rolla associate professor university of wyoming and professor university of wyoming respectively the research reported here was funded under a grant methods development for assessing air pollution control benefits from the u s environmental protection agency we would like to give special thanks to alan carlin and shelby gerking for their helpful suggestions and contributions additional helpful comments were received from a myrick freeman iii john tschirhart and james murdoch all conclusions are of course our sole responsibility

option prices for groundwater protection abstract this paper reports results from a contingent valuation study of households willingness to pay pay to prevent uncertain future nitrate contamination of a potable supply of groundwater the functional form of the corresponding logit model is derived from utility maximization theory probability of future demand change in the probability of future supply and an attitudinal score for interests in the well being of future generations are significant positive determinants of option prices several implications of these results for aquifer management policy are highlighted

an econometric and cultural analysis of rent control in kumasi ghana an empirical analysis of rent control in kumasi ghana is presented based upon a consumer demand model for housing controlled rent to income ratios are exceptionally low for a developing country moreover the asante housing market exhibits unusual cultural attributes and problems in estimating the without rent control situation benefits and costs of rent control are presented by housing types and income levels and distributional impacts assessed

on the evaluation of government programs to reduce environmental risk this paper attempts to identify the correct benefit measure for a government project which might reduce the subjective probability of an environmental risk to health the evaluation of government projects whose costs or benefits are uncertain occupies a considerable literature including arrow and lind fisher and graham the value of reducing the probability of an adverse state outcome has been examined by cook and graham and more recently by gallagher and smith in the latter two papers it was assumed that the individual at risk had access to perfect insurance or contingent claims markets in such a perfect world the value of reducing the probability of an adverse state could be bounded by measures which cook and graham referred to as ransom and compensation and which gallagher and smith show to correspond to the more traditional hicksian notions of compensating and equivalent variation if the assumption of perfect contingent claims markets does not hold it is not possible to set upper and lower bounds on the value of reducing the probability of an adverse state while general forms of health insurance are available to individuals at risk from an environmental hazard specific policies do not allow for the continuous adjustment reallocation of wealth assumed to occur when the individual has access to perfect markets in the next section a more plausible model is constructed it assumes that the individual has a finite set of self protective actions which he or she may take in response to a risk to future health in addition the government may undertake a project to reduce the risk to health it is assumed that both the selfprotective action and the government project have the ability to influence the subjective personal probability of the future states continued good health or ill health there are three major conclusions which emerge from this model a the value of the government project is an option price graham which may be zero or positive if positive the benefits from the project may take the form of cost savings risk probability reduction or both b the value of the government project is dependent on the set of self protective actions and may change as new actions become available or the effectiveness of existing actions is reassessed by the individual c the method of contingent valuation in theory would appear capable of eliciting the proper option price estimates for the project s value to the individual it is even possible to distinguish between the value attributable to cost savings and risk reduction in the next section i present the model and demonstrate the above conclusions in the final section an assessment is made of the in

adaptation and the option value of uncertain environmental resources abstract just as ecology has benefited from the economic theory of optimization economics can benefit from the ecological theory of adaptation we examine the impact of short term non genetic adaptive self protection on the values individuals attach to uncertain prospective environmental resources we demonstrate that collective provision of reductions in supply uncertainty does not necessitate a positive option value given that uncertainty is influenced by the individual s ability to adapt through self protection we conclude that the total value of reducing the supply uncertainty of a natural resource is reflected in both the individual s option price payments for collective provision and in his willingness to pay for adaptation through self protection by ignoring adaptive self protection traditional benefit cost analysis has systematically underestimated the total value of environmental resources that are characterized by uncertain supplies

consumer s surplus without apology the purpose of this paper is to settle the controversy surrounding consumer s surplus and by so doing to validate its use as a tool of welfare economics i will show that observed consumer s surplus can be rigorously utilized to estimate the unobservable compensating and equivalent variations the correct theoretical measures of the welfare impact of changes in prices and income on an individual i derive precise upper and lower bounds on the percentage errors of approximating the compensating and equivalent variations with consumer s surplus these bounds can be explicitly calculated from observable demand data and it is clear that in most applications the error of approximation will be very small in fact the error will often be overshadowed by the errors involved in estimating the demand curve the results in no way depend upon arguments about the constancy of the marginal utility of income consequently this paper supplies specific empirical criteria which can replace the apologetic caveats frequently employed by those who presently apply consumer s surplus moreover the results imply that consumer s surplus is usually a very good approximation to the appropriate welfare measures to preview below i establish the validity of these rules of thumb for a

valuing a fishing day an application of a systematic varying parameter model deciding how to allocate forage among animals is a fundamentally important process in range management the wisdom of these decisions can be enhanced by estimating the marginal value of forage needed by competing species we present a method for

valuing amenity resources under uncertainty a skeptical view of recent resolutions abstract this paper questions colby and cory s recent characterization 1987 1988 1989 of the appropriate benefit measures to be used to value improvements in the quantity quality or conditions of access to environmental resources under uncertainty the paper uses graham s 1981 analysis of individual and aggregate welfare measurement under uncertainty to demonstrate the problems with colby and cory s recommendations it evaluates their classification of important research issues and summarizes in general terms the difficulties that arise in the practical implementation of the conceptual measures for benefits under uncertainty

strategic behaviour some experimental evidence abstract a test to detect the presence of strategic bias in responses to direct willingness to pay questioning is developed and applied in an experimental setting involving three separate groups of individuals the smith auction a demand revealing process is also tested using the same format under direct questioning significant over stating behaviour was observed whilst the bids made in the smith auctions were predominantly under statements whilst the smith auction mean bids appear to be most suited to the task of numerical extrapolation the direct questioning process is cheaper to implement it is concluded that a combination of the two questioning techniques involving the adjustment of direct questioning bids on the basis of information generated by a smith auction carried out using a sub sample of respondents offers the most potential for estimating values in a real world case

option value an exposition and extension this article examines the role of the discount rate in making decisions that will have significant implications for the environment the authors begin by providing a rationale for discounting in general and by describing the main factors that determine

hedonic prices property values and measuring environmental benefits a survey of the issues this paper provides a review of the theoretical basis and the assumptions required in order to use hedonic price equations derived from property value data to obtain measures of the prices and the inverse demand functions for environmental amenities such as air quality it also includes a review and assessment of existing empirical applications of the technique to problems of air and water quality and urban noise

insurance markets with loss prevention activity profits market structure and consumer welfare this article considers the joint production of insurance protection and loss prevention by insurers we first examine the loss distribution of consumers that is potentially the most profitable for insurers unlike in the preponderance of the insurance literature which assumes cost based pricing of insurance policies we allow the insurer to charge whatever price the market will bear we then examine the expected profit maximizing strategy of assumes cost based pricing of insurance policies we allow the insurer to charge whatever price the market will bear we then examine the expected profit maximizing strategy of the insurer in several different market settings whether the insurance protection and loss prevention services can be perfectly bundled plays a key roll in the insurer s pricing decision we consider consumer welfare under various market settings and demonstrate that a consumer may be better off when the insurance market is monopolistic rather than competitive finally we consider whether monopoly power in the loss prevention market leads to monopoly power in an otherwise perfectly contestable insurance market we also show conditions under which a loss prevention monopolist would increase expected profit by integrating into the insurance market