the role of benefit transfer in ecosystem service valuation the demand for timely monetary estimates of the economic value of nonmarket ecosystem goods and services has steadily increased over the last few decades this article describes the use of benefit transfer to generate monetary value estimates of ecosystem services specifically the article provides guidance for conducting such benefit transfers and summarizes advancements in benefit transfer methods databases and analysis tools designed to facilitate its application

preferences for energy efficiency vs renewables how much does a ton of co2 emissions cost concerns about climate change are growing and so is the demand for information about the costs and benefits of mitigating greenhouse gas emissions this paper seeks to estimate the benefits of climate change mitigation as measured by the public s willingness to pay for such policies we investigate the preferences of italian and czech households towards climate change mitigation policy options directly related to residential energy use we use discrete choice experiments which are administered in a standardized fashion to representative samples in the two countries through computer assisted web interviews our preferred estimates of the willingness to pay per ton of co2 emissions avoided is 133 for the italians and 94 euro for the czech respondents at 2014 purchasing power parity we find evidence of considerable heterogeneity in wtp driven by income the two samples differ in their within sample income elasticities of wtp but comparison across the two countries suggests an income elasticity of wtp of one or even greater than one for certain mixed logit specifications

information and time of usage decisions in the bottleneck model with stochastic capacity and demand abstract this paper analyzes the effects of information on participation and time of use decisions for a facility subject to queueing congestion when there are predictable and unpredictable fluctuations in capacity and demand with constant elasticity demand and schedule delay cost functions expected social surplus is greater with perfect than with imperfect information but imperfect information can reduce welfare by inducing adverse changes in individuals times of usage this finding has implications for the design of emerging technologies such as advanced traveller information systems that provide information about usage conditions

what have we learned since hotelling s letter a meta analysis abstract this paper reports the results of a meta analysis of the estimates of the price elasticity of demand for recreation sites using the travel cost method by using econometric methods to summarize empirical literature meta analysis assists in identifying research conclusions despite the non experimental nature of most empirical research in economics in this application the results suggest that modeling decisions based on theory as well as those relying on fitting criteria were important influences to the estimated price elasticities across studies

recent advances in the valuation of ecosystem services and biodiversity recent interest in the economics of biodiversity and wider ecosystem services has been given empirical expression through a focus upon economic valuation this emphasis has been prompted by a growing recognition that the benefits and opportunity costs associated with such services are frequently given cursory consideration in policy analyses or even completely ignored the valuation of biodiversity and ecosystem services is therefore increasingly seen as a crucial element of robust decision making and this has been reflected in a growing body of related research we provide a critical review of some of this research considering the valuation methods applied to date and focussing upon their limitations in respect to certain categories of ecosystem services particularly cultural services and the applicability of the extant literature to new settings substantial questions also remain at the interface of natural science and economics and we consider the potential contribution of the conceptualization of ecosystems as assets as a response to this challenge as part of this review we also highlight the role which large scale ecosystem assessments have played as an impetus to extending the valuation evidence base and the way in which frameworks and assessments of how ecosystems contribute to human wellbeing might be translated into policy thinking and decision analyses

study on benefit transfer in an international setting how to improve welfare estimates in the case of the countries income heterogeneity abstract the paper aims at investigating the validity of benefit transfer in the case of transfers between countries highly heterogeneous in income and demonstrates relative performance of different benefit transfer methods under these conditions lake water quality valuation studies were conducted in two countries in transition poland and the czech republic they reflected two earlier studies carried out in norway we examine how income elasticity of wtp varies with the levels of income and find support for applying the income elasticity of 1 to adjust transferred welfare estimates in case of high differences in income between countries in addition we show that using site specific measures of income outperforms transfers based on gpd per capita the accuracy of benefit transfer is compared using equivalence testing following the tosc two one sided convolutions test a new more informative way of reporting equivalence is proposed based on computing minimum tolerance level rather than specifying it a priori

cross context benefit transfer a bayesian search for information pools commodity equivalence and population similarity are two widely accepted paradigms for the valid transfer of welfare estimates across resource valuation contexts we argue that strict adherence to these rules may leave relevant information untapped and propose a bayesian model search algorithm that examines the probabilities with which two or more sub sets of meta data each corresponding to a different combination of commodity and population share common value distributions using a large meta data set of willingness to pay for diverse outdoor activities across various regions of the united states as an example we find strong potential for contexts that would not traditionally be considered as transfer candidates to form information pools exploiting these commonalities leads to substantial efficiency gains for benefit estimates

incentive incompatibility and starting point bias in iterative valuation questions we test for incentive incompatibility and starting point bias to describe the effects of iterative valuation questions on willingness to pay we compare double triple and multiplebounded models with data from two surveys with similar designs of the valuation questions we find that incentive incompatibility is present in both sets of data and starting point bias is present in one the efficiency of the willingness to pay estimate is improved in only one set of data the potential loss from using iterative questions without controlling for both incentive incompatibility and starting point bias is biased willingness topay estimates

bottleneck congestion and residential location of heterogeneous commuters this study examines the effects of bottleneck congestion and an optimal time varying congestion toll on the spatial structure of cities we develop a model in which heterogeneous commuters choose departure times from home and residential locations in a monocentric city with a bottleneck located between a central downtown and an adjacent suburb we then demonstrate that commuters sort themselves temporally and spatially on the basis of their value of travel time and their flexibility furthermore we reveal that introducing an optimal congestion toll alters the urban spatial structure which contrasts with the previous literature we further demonstrate through an example that congestion tolling can cause the city to physically expand outward which helps rich commuters but hurts poor commuters

testing benefits transfer of forest recreation values over a twenty year time horizon we conduct a functional benefit transfer over 20 years of total willingness to pay based on carborne forest recreation in 52 forests using a mixed logit specification of a random utility model and geographic information systems to allow heterogeneous preferences across the population and for heterogeneity over space results show that preferences for some forest attributes such as species diversity and age as well as transport mode have changed significantly over the period updating the transfer model with present total demand for recreation improves the error margins by an average of 282 average errors of the best transfer model remain 25

estimating the demand for tree canopy a second stage hedonic price analysis in portland oregon the benefits of large patches of tree canopy are estimated by applying a hedonic price model to the sale of single family residential properties in portland oregon the first stage analysis provides evidence of diminishing returns from increasing tree canopy past a certain level the second stage analysis uses a survey of property owners preferences and socioeconomic characteristics to overcome the problem of endogeneity average benefit estimates for the mean canopy cover within mile of properties in the study area using the second stage model are between 0 75 and 2 52 of the mean sale price

do contingent valuation estimates pass a scope test a meta analysis abstract this paper considers the scope test proposed to judge the internal consistency of contingent valuation estimates the test is shown to be quite sensitive to the maintained hypotheses required to derive fairly precise expectations for the properties of wtp functions and therefore a different approach may be needed in gauging the reliability of cv this paper describes an approach that relies on a weight of the evidence criterion and uses meta analysis to develop a systematic appraisal of what the economic values of changes in amenity resources are the approach is illustrated for the case of estimating people s willingness to pay for improving or maintaining visibility at the national parks

wind power externalities a meta analysis this study presents the first quantitative meta analysis of the non market valuation literature on the external effects associated with wind power production a data set of 60 observations drawn from 32 studies is constructed the relative economic values of different types of externalities as well as the impact of various methodological and sample characteristics on welfare estimates are examined the results indicate a significant effect of visual externalities on welfare estimates in both directions i e a positive effect of visual improvements and a negative effect of deteriorations this finding corresponds to predictions of the importance of visual impacts in the social science literature external effects of wind power on biodiversity mainly birds do not affect welfare estimates indirect externalities caused by conventional sources of electricity that can be avoided by wind power such as a the reduction of air pollution do neither have a significant impact on welfare measures methodologically we find substantial but inelastic income effects and for choice experiments clear evidence of sensitivity to scope from a policy point of view our results suggest that a policy mix combining a promotion of wind turbines with another green policy facilitates expansion of wind energy

choosing a functional form for an international benefit transfer evidence from a nine country valuation experiment abstract this paper investigates the performance of common approaches in international benefit transfer using data from identical and simultaneous contingent valuation studies on marine water quality in nine european countries the environmental good is shared by the study countries but the countries differ substantially in their income levels and other characteristics we compare the performance of value transfers with or without income elasticity of willingness to pay adjustments and function transfers that include only core variables supported by economic theory our results point to a new source of uncertainty associated with function transfer choosing a particular functional form even if only theoretically relevant explanatory variables are used the theory offers no insights with respect to a functional relationship of the dependence e g linear log linear exponential polynomial we show that while different functional forms may offer improvements in model fit this does not necessarily translate to improvements in transfer errors or minimum tolerance levels in our case the value transfer with constant unit income elasticity adjustment corresponding to the log log functional relationship between willingness to pay and income performs the best including additional explanatory variables or using other functional forms worsens the quality of transfers overall our study questions the rationale for using more complicated function transfers in international benefit transfers as the relationships observed within a country or a group of countries does not necessarily translate to dependencies between countries

characterizing the effects of valuation methodology in function based benefits transfer abstract meta analyses have demonstrated that willingness to pay wtp estimates vary systematically according to methodological factors the benefits transfer literature provides little guidance with regard to the treatment of such effects transfers are typically conducted by ignoring such effects using ad hoc adjustments or otherwise suppressing information regarding the sensitivity of wtp to methodological attributes this paper illustrates a means to characterize methodological effects within benefits transfer based on an application of the common bootstrap drawing from meta analysis the approach characterizes the sampling distribution of wtp with respect to patterns of methodological variation present in underlying studies results provide a means to characterize the extent of variation associated with predefined groups of methodological attributes providing transparent information on the sensitivity of wtp not typically available in benefits transfer

how reliable are meta analyses for international benefit transfers meta analysis has increasingly been used to synthesise the environmental valuation literature but only a few test the use of these analyses for benefit transfer these are typically based on national studies only however meta analyses of valuation studies across countries are a potentially powerful tool for benefit transfer especially for environmental goods where the domestic literature is scarce we test the reliability of such international meta analytic transfers and find that even under conditions of homogeneity in valuation methods cultural and institutional conditions across countries and a meta analysis with large explanatory power the transfer errors could still be large further international meta analytic transfers do not on average perform better than simple value transfers averaging over domestic studies thus we question whether the use of meta analysis for practical benefit transfer achieves reliability gains justifying the increased effort however more meta analytic benefit transfer tests should be performed for other environmental goods and other countries before discarding international meta analysis as a tool for benefit transfer

is the income elasticity of the willingness to pay for pollution control constant how willingness to pay for environmental quality changes as incomes rise is a central question in several areas of environmental economics this paper explores both theoretically and empirically whether or not the willingness to pay wtp for pollution control varies with income our model indicates that the income elasticity of the marginal wtp for pollution reduction is only constant under very restrictive conditions our empirical analysis tests the null hypothesis that the elasticity of the wtp for pollution control with respect to income is constant employing a multi country contingent valuation study of eutrophication reduction in the baltic sea our findings reject this hypothesis and estimate an income elasticity of the wtp for eutrophication control of 0 1 0 2 for low income respondents and 0 6 0 7 for high income respondents thus our empirical results suggest that the elasticity is not constant but is always less than one this has implications for how benefits transfer exercises and for theoretical explanations of the environmental kuznets curve

dynamic inconsistency in valuing environmental goods abstract intertemporal tradeoffs continue to intrigue both academics and policy makers this paper explores patterns of dynamic inconsistency in valuing environmental goods we develop a model that predicts an individual will value extended access to an environmental good less than avoiding delayed access if time and money are complementary this value disparity results in a low marginal rate of time preference for avoiding delayed access and a high rate for acquiring extended access using the contingent valuation method we find behavior partially consistent with predictions marginal rates of time preference are highly situation and individual specific

reducing barriers in future benefit transfers needed improvements in primary study design and reporting abstract original research provides many social benefits including additions to our stock of knowledge benefit transfer is a formal process whereby our stock of knowledge rather than original research is used to inform decisions any shortcoming in this stock directly affects our ability to conduct valid and reliable benefit transfers this paper discusses three general criteria that are necessary for valid benefit transfers and how original research designs and reporting of results unnecessarily constrain the potential of benefit transfers we make several suggestions regarding how original research through improved design and reporting might increase the validity and reliability of benefit transfers we also recommend that repositories for original research surveys and data be developed to insure long term availability of study information

disentangling preferences and expectations in stated preference analysis with respondent uncertainty the case of invasive species prevention abstract contingent valuation typically involves presenting the respondent with a choice to pay for a program intended to improve future outcomes such as a program to place parcels into conservation easement or a program to manage an invasive species deducing from these data the value of the good or bad at the core of the program the welfare gain generated by a parcel of conserved land for instance or the loss incurred by a species invasion often is not possible because respondent preferences are conflated with their expectations about future environmental outcomes in the absence of the program this paper formally demonstrates this conundrum in the context of a standard contingent valuation survey and examines the use of additional survey data to resolve it the application is to the prevention of lake invasions by eurasian watermilfoil myriophyllum spicatum an invasive aquatic plant that is present in many lakes in the northern u s and canada and a possible threat to many more respondents are shoreline property owners on lakes without eurasian watermilfoil the estimated per property welfare loss of a lake invasion is 30 550 for one model and 23 614 for another both of which are in reasonable agreement with estimates obtained from a recent hedonic analysis of eurasian watermilfoil invasions in the study area 16 and from a companion contingent valuation survey of shoreline property owners on already invaded lakes

a temporal and spatial equilibrium analysis of commuter parking abstract this paper examines the effects of parking availability on morning rush hour congestion and assesses the relative efficiency of road tolls and parking fees without pricing drivers occupy parking in order of increasing distance from the cbd a time varying toll can prevent queueing but does not affect the order in which parking spots are taken optimal location dependent parking fees may be superior they do not eliminate queueing but induce drivers to park in order of decreasing distance from the cbd thereby concentrating arrival times closer to work start times competitively set parking fees do nothing to reduce queueing and are relatively inefficient

is hypothetical bias a universal phenomenon a multinational investigation a concern with the contingent valuation method cvm is the finding that hypothetical and real statements of value often differ we test whether hypothetical bias broadly defined is independent of location by comparing real and hypothetical votes on a dichotomous choice referendum in china france indiana kansas and niger we find significant differences in hypothetical bias across locations and reject the hypothesis that hypothetical bias is independent of location as opposed to the typical finding reported in the literature subjects in niger significantly understated their willingness to pay in the hypothetical referendum

a mire of discount rates delaying conservation payment schedules in a choice experiment studies on the public s implicit discount rate in the willingness to pay for environmental amenities have mostly employed contingent valuation surveys we investigate respondents time preferences using choice experiments with four payment schedules in a split sample design in the context of mire conservation we first examine preference and taste heterogeneity among respondents finding them to a large extent independent of payment schedules next we use an endogenous approach to jointly estimate the implicit discount rates and preferences using choice experiments data we explore exponential and hyperbolic discounting model specifications we find insensitivity to the length of the payment period and support for hyperbolic discounting furthermore we provide policy relevant valuation results concerning mire conservation

three reasons to use annual payments in contingent valuation surveys convergent validity discount rates and mental accounting abstract we present three arguments for using ongoing annual payments in contingent valuation cv surveys that estimate the benefit of a long lasting environmental improvement first by matching the duration of the payments with the duration of the environmental benefits survey respondents are spared from performing complicated present value calculations second willingness to pay wtp estimates from cv surveys that include ongoing annual payments best match wtp estimates obtained using travel cost surveys third respondents are less likely to face binding mental budget constraints with ongoing annual payments than with a larger one time payment in addition respondents discount rates may be estimated by collecting non hypothetical individual time preference data as part of the valuation survey

meta analysis benefit transfer and methodological covariates implications for transfer error meta regression models in the valuation literature demonstrate that willingness to pay estimates vary according to methodological factors neither theory nor characteristics of policy sites dictate the treatment of associated covariates within benefit transfer however and the literature provides few insights into potential impacts of common empirical treatments this paper introduces a method to systematically characterize the impact of methodological variables on transfer error using a repeated leave one out convergent validity framework the analysis contrasts errors for a hypothetical ideal case in which correct methodological covariate treatments are known to the realistic case in which the correct treatment is unknown results indicate that the common assumption of mean values for methodological covariates leads to only a modest increase in mean transfer error relative to that found in the hypothetical ideal case

environmental valuation with periodical payments in high inflation economies an argentinean case study abstract stated preference valuation surveys often ask respondents for periodical payments sometimes for the remaining life of the individuals questionnaires do not usually specify whether those payments would vary according to inflation this may be less important in low inflation economies but results could differ significantly in high inflation countries a contingent choice exercise was conducted to explore the severity of this effect in argentina the empirical application focused on an anthropogenic pressure mitigation program for the basins of the mendoza region a comparison of willingness to pay results from a scenario where annual payments were to be increased according to inflation with another of fixed annuities found inflation to be significantly influential on respondents stated values furthermore a test on the robustness of the estimated values found results to be consistent with prior expectations

intertemporal valuation of river restoration willingness to pay for an environmental improvement is a function of how long it takes to deliver the improvement to measure the effect of time on benefits i utilize a discrete choice experiment that includes an attribute for delay until the improvement occurs and simultaneously estimate discount rates and valuation parameters i estimate the present value of immediate and delayed minnesota river basin improvements using discount rates directly estimated from the econometric model compared to an immediate river basin cleanup minnesota residents lose almost half of the benefits when cleanup is delayed by 5 years

controlling starting point bias in double bounded contingent valuation surveys in this paper we study starting point bias in double bounded contingent valuation surveys this phenomenon arise in applications that use multiple valuation questions indeed response to follow up valuation questions may be influenced by the bid proposed in the initial valuation question previous research have been conducted in order to control for such an effect however they find that efficiency gains are lost when we control for undesirable response effects relative to a single dichotomous choice question contrary to these results we propose a way to control for starting point bias in double bounded questions with gains in efficiency

fat tails and truncated bids in contingent valuation an application to an endangered shorebird species a yes response function in a contingent valuation study is said to have fat tails if it has a high and slowly declining yes response rate at high bid levels truncated bids refer to the practice of dropping high bid offers before a yes response rate of near zero is reached this is a common practice in contingent valuation we explore the extent and implications of fat tails and truncated bids in a study of an endangered shorebird species we find among other things that mean willingness to pay is quite sensitive to the highest bid offered so much so that the choice of highest bid nearly dictates outcomes

choices without prices without apologies valuing is usually regarded as a process of compressing information about attributes into a single metric armed with this reduced form of compact information the consumer can consider a particular object with a particular price attached or implied and make an informed decision but the process of valuing is less straightforward than we ordinarily suppose when environmental goods and services become the object of information compaction it is possible that important information is lost we comment on the choice problem germane to environmental goods and services and challenge the presumption that environmental choices made without explicit pricing are inferior to those in which hypothetical valuation studies are undertaken

evaluating the performance of benefit transfer an empirical inquiry abstract benefit transfers are used by public agencies needing information on costs and benefits of policy decisions although scientific debate regarding the validity of benefit transfer is ongoing this article develops a methodology to evaluate the performance of direct benefit transfer and benefit function transfer and applies the methodology to two pairs of similar non market amenities empirical results indicate that benefit function transfer is more robust than transfer of average site benefits our results suggest that the circumstances under which benefit function transfer provides valid policy relevant information may be limited and that errors from applying benefit transfer can be quite large even across seemingly similar amenities

national and international benefit transfer testing with a rigorous test procedure benefit transfer as a mean to transfer values from existing monetary valuation studies to new policy sites has been in use for many years this paper aims to analyze the forecasting quality of benefit transfer by applying a rigoroust test also referred to as accuracy t test that takes into account testing errors which were made in previous surveys beside the analysis of national benefit transfers based on two german contingent valuation studies additional efforts were made to investigate into the validity and accuracy of international benefit transfer by considering two norwegian studies that employed a similar survey design

discounting the distant future an experimental investigation we use a laboratory experiment to elicit discount rates over a 20 year time horizon using government savings bonds as a payment vehicle when using a constant exponential discount rate function we find an implied average discount rate of 4 9 which is much lower than has been found in previous experimental studies that used time horizons of days or months however we also find strong support for non constant declining discount rates for longer time horizons with an extrapolated implied annual discount rate approaching 0 5 in 100 years there is heterogeneity in discount rates and risk preferences in that people with more optimistic beliefs about technological progress have higher discount rates these findings contribute to the debate over the appropriate discount rate to use in comparing the long term benefits of climate change mitigation to the more immediate costs

winning or losing from dynamic bottleneck congestion pricing the distributional effects of road pricing with heterogeneity in values of time and schedule delay abstract this paper analyses the efficiency and distributional impacts of congestion pricing in vickrey s 1969 dynamic bottleneck model of congestion allowing for continuous distributions of values of time and schedule delay we find that congestion pricing can leave a majority of travellers better off even without returning the toll revenues to them we also find that the consumer surplus losses or gains from tolling are not strictly monotonic in the value of time because they also depend on the value of schedule delays the greatest losses are not incurred by drivers with the lowest value of time but by users with an intermediate value of schedule delays and the lowest value of time for that value of schedule delays for second best pricing with an untolled alternative the pattern of distributional effects is quite similar to that for first best pricing in contrast with results from prior static models users who are indifferent between the two alternative routes are not the ones who gain least from this type of second best pricing our results suggest that in assessing the distributional impacts of road congestion pricing it is important to take into account both the distribution of the value of time and of the value of schedule delays as well as the dynamics of departure time choice

using choice experiments to value the environment this paper we outline the choice experiment approach to environmental valuation this approach has its roots in lancaster s characteristics theory of value in random utility theory and in experimental design we show how marginal values for the attributes of environmental assets such as forests and rivers can be estimated from pair wise choices as well as the value of the environmental asset as a whole these choice pairs are designed so as to allow efficient statistical estimation of the underlying utility function and to minimise required sample size choice experiments have important advantages over other environmental valuation methods such as contingent valuation and travel cost type models although many design issues remain unresolved applications to environmental issues have so far been relatively limited we illustrate the use of choice experiments with reference to a recent uk study on public preferences for alternative forest landscapes this study allows us to perform a convergent validity test on the choice experiment estimates of willingness to pay

starting point bias in dichotomous choice valuation with follow up questioning abstract follow up questions are frequently used to improve the efficiency of dichotomous choice contingent valuation questionnaires however a number of authors e g 12 16 have noted a significant difference between the wtp distributions implied by initial and follow up question responses this paper investigates starting point bias as one explanation for the phenomenon we develop a model of starting point bias in the context of dichotomous choice questioning with follow up using a monte carlo simulation to illustrate the potential bias imparted to wtp estimates an application is provided based on data from a cv study in northcentral iowa

benefits transfer of willingness to pay estimates and functions for health risk reductions a cross country study this paper provides a first application of the techniques of benefits transfer to the health economics literature these techniques seek to transfer the value of some good from one survey context to a new policy context so avoiding the need for new valuation surveys each time a new policy question arises two approaches to benefits transfer are assessed the simple transfer of mean values and the transferral of value functions we develop a new methodology for the latter approach in which value functions are iteratively built up from theoretical principles with transfer errors being tested each time a new variable is added through a novel application of advanced statistical tests we show that this approach outperforms the transferral of statistically driven best fit functions the case study presented focuses upon the transfer of contingent valuation cv willingness to pay wtp estimates and associated value functions for reducing the health risks associated with solar ultraviolet uv exposure common format studies are conducted in four countries with transfers between all of these being undertaken by calculating errors in predicted versus actual values across countries we show that when transferring between similar contexts simple mean value transfers outperform more complex value function transfers with the magnitude of the former errors being encouragingly small however this result is reversed when transfers are undertaken across dissimilar contexts where value functions partially adjust for these differences in summary these findings provide support and guidance for future applications

designing transactions without framing effects in iterative question formats abstract several studies document that iterative question formats used in contingent valuation studies produce anomalies in respondent behavior that appear to threaten the validity of welfare estimates by decomposing iterative question formats into their ascending and descending sequences we show that these anomalies occur only in ascending sequences we describe the conditions under which comparable patterns of behavior are likely to be found in other iterative question formats that begin with a discrete willingness to pay question we then develop a unified explanation of these anomalies using our model of framing based on prospect theory we provide the first head to head test of rival explanations of these behavioral patterns by developing refutable hypotheses for the strategic behavior yea saying anchoring and cost expectations models finally based on our own statistically robust model we show how these anomalies can be eliminated without loss of the statistical efficiency of most iterative question formats

test retest reliability of the contingent valuation method a comparison of general population and visitor responses the reliability of the contingent valuation method is evaluated by resurveying the same general households and visitors nine months after their original survey test retest correlations on willingness to pay are statistically significant and ranged from 422 for the general population sample to 782 for the visitor sample using a paired t test there was no statistical difference between an individual s first and second reported willingness to pay chow tests comparing the original and resurvey willingness to pay functions showed no statistical difference at the 01 level reported willingness to pay is reasonably stable over the time period surveyed

environmental value transfer state of the art and future prospects abstract the main objectives of the paper are to 1 give an overview of the state of the art of environmental value transfer 2 discuss its prospects and potential role in cba as a decision support tool and 3 provide further guidelines for proper use and application environmental value or benefit transfer is a technique in which the results of studies on monetary environmental valuation are applied to new policy contexts the technique is controversial not least because of academic and political reservations over the usefulness and technical feasibility of economic valuation tools to demonstrate the importance of environmental values in project or programme appraisals testing of environmental value transfer so far has been unable to validate the practice taking into account the conditions set out in the literature for valid and reliable value transfer most transfers appear to result in substantial transfer errors this paper discusses why and addresses the question of which factors may have been overlooked it is argued that the problem is much more fundamental than previously acknowledged strict guidelines in terms of quantitative adjustment mechanisms to valid value transfer are meaningless if the more fundamental issue of differences in the very nature of the values elicited is not addressed at the same time

how people respond to contingent valuation questions a verbal protocol analysis of willingness to pay for an environmental regulation abstract this paper investigates what a respondent is thinking when answering a willingness to pay question in a contingent valuation using a think aloud technique from psychology called verbal protocol analysis the willingness to pay responses we observed seem to be constructed from a variety of considerations including an obligation to pay a fair share of the cost of the solution and signaling concern for a larger set of environmental issues the finding that respondents seem to construct their values at the time they are asked rather than reporting a more well defined value is seen as consistent with over two decades of research on the psychology of decision making potential uses of verbal protocols in contingent valuation studies are also discussed

discount rates inferred from decisions an experimental study two hundred and four students of economics and finance participated in an intertemporal choice experiment which manipulated three dimensions in a 4 4 4 factorial design scenario postponing a receipt postponing a payment expediting a receipt expediting a payment time delay 0 5 1 2 and 4 years and size of cashflow 40 200 1000 and 5000 individual discount rates were inferred from the responses and then used to test competitively four hypotheses regarding the behavior of discount rates the classical hypothesis asserting that the discount rate is uniform across scenarios time delays and sums of cashflow was flatly rejected a market segmentation approach was found lacking the results support an implicit risk hypothesis according to which delayed consequences are associated with an implicit risk value and an added compensation hypothesis which asserts that individuals require compensation for a change in their financial position

the validity of environmental benefits transfer further empirical testing this paper provides further empirical evidence of the validity of environmental benefits transfer based on cv studies by expanding the analysis to include control factors which have not been accounted for in previous studies these factors refer to differences in respondent attitudes traditional population characteristics were taken into account but these variables do not explain why respondents from the same socio economic group may still hold different beliefs norms or values and hence have different attitudes and consequently state different wtp amounts the test results are mixed the function transfer approach is valid in one case but is rejected in the 3 other cases investigated in this paper we provide further evidence that in the case of statistically valid benefits transfer the function approach results in a more robust benefits transfer than the unit value approach we also show that the equality of coefficient estimates is a necessary but insufficient condition for valid benefit function transfer and discuss the implications for previous and future validity testing

random queues and risk averse users we analyse nash equilibrium in time of use of a congested facility users are risk averse with general concave utility queues are subject to varying degrees of random sorting ranging from strict queue priority to a completely random queue we define the key no residual queue property which holds when there is no queue at the time the last user arrives at the queue and prove that this property holds in equilibrium under all queueing regimes considered the no residual queue property leads to simple results concerning the equilibrium utility of users and the timing of the queue

distributional weights in environmental valuation and cost benefit analysis theory and practice abstract cost benefit analysis cba is built on the kaldor hicks efficiency criterion whereby projects that have aggregate positive net benefits are recommended even if those who lose are not compensated for their losses two kinds of problems can be identified with the use of the criterion first as income tends to affect monetary welfare changes positively the preferences of those with higher wealth have a larger weight in societal decision making second monetary welfare changes can be thought of as changes in real income which matter more for those with a lower initial wealth level both problems can be mitigated with distributional weighting despite their strong theoretical pedigree distributional weights have been largely neglected in practical cbas one exception being analyses in climate change economics we present the theory of distributional weighting and illustrate how weights can be applied empirically in an international environmental cba that deals with marine water quality improvements we show that different weighting schemes can result in different policy recommendations we also show that taking the income distribution within countries into account can change a country s willingness to participate in the water quality improvement program and that the income elasticity of willingness to pay wtp is an important indication of the direction of change

congestion in a city with a central bottleneck we consider dynamic congestion in an urban setting where trip origins are spatially distributed all travelers must pass through a downtown bottleneck in order to reach their destination in the cbd each traveler chooses departure time to maximize general concave scheduling utility we find that at equilibrium travelers sort according to their distance to the destination the queue is always unimodal regardless of the spatial distribution of trip origins we construct a welfare maximizing tolling regime which eliminates congestion all travelers located beyond a critical distance from the cbd gain from tolling even when toll revenues are not redistributed while nearby travelers lose we discuss our results in the context of acceptability of tolling policies

joint estimation of discount rates and willingness to pay for public goods abstract we analyze willingness to pay wtp for environmental programs whose time periods of benefit and repayment differ using a net present value framework that identifies parameters of both wtp and personal discount rates respondents to a contingent valuation survey focusing on protection of critical habitat buffer zones for the endangered steller sea lion in alaska were asked their willingness to pay for 1 5 and 15 year repayment periods we jointly estimate the personal discount rates and wtp via maximum likelihood and compare with a model assuming a fixed market discount rate

income inequality and willingness to pay for environmental public goods we study how the distribution of income among members of society and income inequality in particular affects social willingness to pay wtp for environmental public goods we find that social wtp for environmental goods decreases increases with income inequality if and only if environmental goods and manufactured goods are substitutes complements we derive adjustment factors for benefit transfer to control for differences in income distributions between a study site and a policy site for illustration we quantify how social wtp for environmental public goods depends on the respective income distributions for empirical case studies in sweden and the world at large we find that the adjustment for income inequality can be substantial

using the delphi method to value protection of the amazon rainforest abstract valuing global environmental public goods can serve to mobilize international resources for their protection while stated preference valuation methods have been applied extensively to public goods valuation in individual countries applications to global public goods with surveys in multiple countries are scarce due to complex and costly implementation benefit transfer is effectively infeasible when there are few existing studies valuing similar goods the delphi method which relies on expert opinion offers a third alternative we explore this method for estimating the value of protecting the amazon rainforest by asking more than 200 environmental valuation experts from 37 countries on four continents to predict the outcome of a contingent valuation survey to elicit willingness to pay wtp for amazon forest protection by their own countries populations the average annual per household values of avoiding a 30 forest loss in the amazon by 2050 assessed by experts vary from a few dollars in low income asian countries to a high near 100 in canada germany and norway the elasticity with respect to average ppp adjusted per household incomes is close to unity results from the delphi study match remarkably well those from a recent population stated preference survey in canada and the united states using a similar valuation scenario

international benefit transfer methods and validity tests abstract the use of value estimates measured in one country to value policy changes in another country would seem to introduce some unique issues and challenges even when the good being valued is identical these issues include how should values be converted from one currency to another how to account for differences in measurable characteristics when those can vary markedly between countries especially income and how to account for differences between countries in culture and shared experiences that are difficult to quantify however these challenges in international benefit transfer are not that different from those encountered in transfers between regions within a country and transfer errors are comparable to those seen in intra country transfers

the failure of competition in the credit card market the bank credit card market containing 4 000 firms and lacking regulatory barriers casually appears to be a hospitable environment for the model of perfect competition nevertheless this article reports that credit card interest rates have been exceptionally sticky relative to the cost of funds moreover major credit card issuers have persistently earned from three to five times the ordinary rate of return in banking during the periods 1983 88 the failure of the competitive model appears to be partly attributable to consumers making credit card choices without taking account of the very high probability that they will pay interest on their outstanding balances copyright 1991 by american economic association

identifying individual discount rates and valuing public open space with stated preference models an individual s rate of time preference is an important consideration for individuals deciding whether to support a public good since the benefits of a public good often come in the future our study finds individual discount rates from a contingent valuation method cvm question where the time frame of the payment schedule is varied across surveys we find discount rates similar to the rates found in the recent revealed preference and experimental literature of around 30 our cvm question addresses the preservation of additional open space adjacent to a large regional park at the urban fringe of portland oregon

pesticide risk valuation in empirical economics a comparative approach abstract pesticide use in agriculture poses several risks to both human health and nontarget agro ecosystems due to lack of information on the monetary value of reducing pesticide risks it is difficult to perform an economic analysis that addresses social efficiency of policy and draws conclusions about the appropriate degree of regulation the aim of the current paper is to present a critical overview of the empirical literature on pesticide risk valuation that provides disaggregate willingness to pay estimates wtps of pesticide risks reduction recent multidimensional classification methods such as coined decision tree analysis are used in a comparative approach as tools for explaining the differences in empirical research findings the analysis shows that the order of magnitude of wtps is related to both the valuation technique and to the data available from biomedical and ecotoxicological literature it also shows that wtp estimates of pesticide risks cannot be simply averaged over several empirical studies the order of magnitude of a wtp estimate is in fact related to the specific type of risk and to the nature of the risk scenario considered as well to lay people s subjective perception of risks

do stated preference methods stand the test of time a test of the stability of contingent values and models for health risks when facing an extreme event abstract this paper focuses on the temporal stability of dichotomous choice dc contingent values and models and the implication of time related aspects for benefits transfer as a viable valuation method from a practical point of view time plays an important role in benefits transfer results are used from studies often carried out years ago and the obvious question is to what extent the estimated values and models stand the test of time in the case of value function transfer this implies testing the robustness of the estimated coefficient estimates over time the novelty of the temporal stability work presented here is that two identical dc contingent valuation cv studies of the health risks associated with bathing water quality were carried out before and during extreme weather conditions causing the closure of bathing locations for public health reasons differences in contingent values and models before and during the extreme event are tested the extreme event causes the seasonal good in question to become temporarily scarcer and marginal wtp is therefore expected to be higher during the extreme event than before but not that underlying preferences have changed hence basically two things are tested the effect of time on stated preferences for a seasonal good and the effect of the extreme event on these preferences wtp values before and during the event appear to be robust also when accounting for substitution effects the results before and during the extreme event remain transferable when accounting for theoretically expected factors in a simple multivariate transfer model however when introducing additional and contextual ad hoc factors in the model the estimated models and their random components become significantly different and hence not transferable suggesting that unobserved preferences may not have been randomly distributed across the two surveys after all

benefit transfer in europe how reliable are transfers between countries the benefits for specific health impacts related to air and water quality were measured in simultaneous contingent valuation surveys conducted in five different european countries consistent inter country differences in willingness to pay to avoid ill health episodes could not be explained by measurable differences in individual characteristics international transfer of unit values resulted in an average transfer error of 38 accounting for measurable differences among countries in health status income and other demographic measures either through ad hoc adjustments to the transferred values or through value function transfer did not improve transfer performance

sensitivity of contingent valuation to alternative payment schedules insensitivity to payment schedule wherein respondents do not adequately differentiate between a one time payment and a series of payments may be an important but often overlooked factor in the design interpretation and use of contingent valuation studies several contingent valuation experiments involving a familiar private good and a less familiar environmental commodity indicate that although respondents distinguished between lump sum and periodic payment schedules implicit discount rates were very high suggesting that sensitivity to payment schedule is an important subject for further study

willingness to pay and sensitivity to time framing a theoretical analysis and an application on car safety stated preference sp surveys attempt to obtain monetary values for non market goods that reflect individuals true preferences numerous empirical studies suggest that monetary values from sp studies are sensitive to survey design and so may not reflect respondents true preferences this study examines the effect of time framing on respondents willingness to pay wtp for car safety we explore how wtp per unit risk reduction depends on the time period over which respondents pay and face reduced risk in a theoretical model and by using data from a swedish contingent valuation survey our theoretical model predicts the effect to be nontrivial in many scenarios used in empirical applications in our empirical analysis we examine the sensitivity of wtp to an annual and a monthly scenario our theoretical model predicts the effect from the time framing to be negligible but the empirical estimates from the annual scenario are about 70 higher than estimates from the monthly scenario

estimating individual discount rates in denmark a field experiment we estimate individual discount rates with respect to time streams of money using controlled laboratory experiments these discount rates are elicited by means of field experiments involving real monetary rewards the experiments were carried out across denmark using a representative sample of 268 people between 19 and 75 years of age individual discount rates are estimated for various households differentiated by socio demographic characteristics such as income and age our conclusions are that discount rates are constant over the 12 month to 3 year horizons used in these experiments and that discount rates vary substantially with respect to several socio demographic variables hence we conclude that it would be reasonable to assume constant discount rates for specific household types but not the same rates across all households

benefit transfer via preference calibration prudential algebra for policy this paper proposes a new approach to benefit transfer the method assumes a specific form for preferences and uses available benefit information to identify and calibrate the preference parameters to match the existing benefit estimates this approach assures economic consistency of the transfers benefit measures can never be inconsistent with household income the logic also offers a series of potentially observable predictions that can be used to gauge the plausibility of benefit transfers when multiple benefit estimates from different methods are available such as hedonic property value travel cost demand and contingent valuation the framework uses the definition of the benefit concept from each method in a single preference function to reconcile differences it provides a specific way to take account of baseline conditions and scope effects i e the size of the proposed change consistently in the transfer the method is illustrated using estimates for benefit measure changes in water quality from three studies travel cost demand hedonic property value and contingent valuation analysis q26

the transferability of benefit transfer contingent valuation of water quality improvements in costa rica abstract identical contingent valuation studies of willingness to pay wtp for improvements in coastal water quality were conducted in the town of jaco and city of puntarenas on the pacific coast of costa rica several common hypotheses for benefit transfer reliability were tested for the transfer of wtp estimates between the two communities as well as between districts within puntarenas this study finds no basis for the claim that the reliability of benefit transfer increases with proximity between the study site where wtp estimates are taken from and the policy site estimates are transferred to the claim that transfer of wtp adjusted by the benefit function outperforms transfers of unadjusted or simple income adjusted wtp is rejected for this particular study results also show that census type socio economic site characteristics are necessary but not sufficient to explain site specific differences in wtp the trade offs in designing valid and reliable benefit transfer studies with transferable results are discussed

hedonic models and air pollution twenty five years and counting this paper reports a meta analysis of how effectively hedonic property models have detected the influence of air pollution on housing prices probit estimates are reported describing how data model specification and local property market conditions in cities represented in thirty seven studies influence the ability of hedonic models to uncover negative statistically significant relationships between housing prices and air pollution measures

testing the influence of substitute sites in nature valuation by using spatial discounting factors this paper investigates the effect of nearby nature substitute sites on preferences for nature restoration contrary to prior studies we use a respondent centric approach to control for substitute sites we assess each respondent specific spatial context by computing densities of nature substitute sites within various ranges from each respondent s home this approach considers the use and non use values of nature together data from three similar discrete choice experiments carried out in flanders belgium are compared different spatial discounting factors are tested to explore how the substitution effect behaves with regard to distance latent class analyses are performed to account for preference heterogeneity among respondents we observe divergent behaviours across groups of respondents the distance to substitutes affects how respondents gauge substitute sites we find a significant influence of the squared average buffer distance but this effect varies in sign across case studies and classes of respondents our results demonstrate that individual specific gis data can significantly improve the representation of the spatial context and the transferability of value functions however the roles played by preference heterogeneity and nature perception on respondents capacity to value nature still deserves further attention in future research

the personal discount rate evidence from military downsizing programs the military drawdown program of the early 1990s provides an opportunity to obtain estimates of personal discount rates based on large numbers of people making real choices involving large sums the program offered over 65 000 separatees the choice between an annuity and a lump sum payment despite break even discount rates exceeding 17 percent most of the separatees selected the lump sum saving taxpayers 1 7 billion in separation costs estimates of discount rates range from 0 to over 30 percent and vary with education age race sex number of dependents ability test score and the size of payment

sunshine as disinfectant the effect of state freedom of information act laws on public corruption abstract we assess the effect of freedom of information act foia laws on public corruption in the united states specifically we investigate the impact of switching from a weak to a strong state level foia law on corruption convictions of state and local government officials the evidence suggests that strengthening foia laws has two offsetting effects reducing corruption and increasing the probability that corrupt acts are detected the conflation of these two effects led prior work to find little impact of foia on corruption we find that conviction rates approximately double after the switch which suggests an increase in detection probabilities however conviction rates decline from this new elevated level as the time since the switch from weak to strong foia increases this decline is consistent with officials reducing the rate at which they commit corrupt acts by about 20 these changes are more pronounced in states with more intense media coverage for those that had more substantial changes in their foia laws for foia laws which include strong liabilities for officials who contravene them for local officials and for more serious crimes conviction rates of federal officials who are not subject to the policy show no concomitant change