the influence of design dimensions on stated choices in an environmental context discrete choice experiments are increasingly used in the context of environmental valuation however there is still little known about the influence of the complexity of the choice task on model outcomes in this paper we investigate task complexity in terms of the design dimensionality of the choice experiment by systematically varying the number of choice sets alternatives attributes and levels as well as the level range we largely follow a design of designs approach originally introduced in transportation first we analyse the influence of the design dimensionality on participants dropout behaviour finding that the probability to drop out of the survey is influenced by socio demographic characteristics and increases with the number of choice sets attributes as well as with designs having five alternatives second we investigate the impact of the design dimensions on stated choices by estimating a multinomial logit model and heteroskedastic logit models results show that the error term variance is influenced by socio demographic characteristics as well as by all design dimensions moreover we find that accounting for the impact of the design dimension on the error variance does not significantly change willingness to pay estimates

joint estimation of multiple cvm scenarios under a double bounded questioning format contingent valuation surveys frequently ask the same respondent for willingness to pay wtp for either different programs or different levels of provision of a single program when multiple scenarios are considered by the respondent the errors in the estimates of wtp are likely to be correlated across scenarios failing to account for correlation may lead to erroneous inferences concerning differences in wtp this paper presents a technique that can be used to jointly estimate wtp for multiple scenarios proposed within a survey when the double bounded questioning format is used monte carlo simulations are employed to show that estimates derived from the joint model provide lower parameter variances as well as tighter confidence intervals surrounding wtp the model is used to estimate wtp values for data collected in telephone interviews of california residents concerning wtp for fire reduction programs in oregon and california variance properties of these estimates are shown to be similar to those estimated using simulated data

the effect of within season variability on estimates of recreational value for trout anglers in new zealand abstract recreational benefit estimates can be substantially improved by incorporation of data on attributes that are averaged over shorter periods of time so as to better represent within season variability this approach may be advantageous across a wide range of non market valuation settings we use angling survey data that includes bimonthly data on angler demand water quality and fish weight in the rotorua lakes and compare our results with those obtained using attribute data averaged over the year estimates of marginal willingness to pay for catching fish based on annual data are 5 times higher than those based on bimonthly data likewise the estimated welfare gain from a 1 m increase in water clarity is 1 5 times higher in models using annual data we find that within season variability in recreational site attributes can have a statistically significant effect on welfare estimates the effect of seasonal variation in site attributes has rarely been accounted for in travel cost random utility models of recreation we conclude that appropriate treatment of temporal variability can assist environmental managers to design more cost effective policies based on improved estimates of welfare gains

foreign ownership and the theory of trade and welfare some standard topics in the theory of international trade are reconsidered in this paper by distinguishing between national and aggregate income when fixed supplies of foreign inputs are present within the home country under conditions that would ensure a national welfare gain if foreign ownership were absent international transfer economic growth or tariff policy might cause a national welfare loss in the presence of foreign ownership the techniques developed could be applied to other domestic distinctions such as those based on race sex age or ethnicity and to the theory of customs unions in a three country world

preferences for pesticide regulation i look at consumer preferences for pesticide regulation the analysis is based on a random telephone survey of households there is a distinct preference for pesticide regulation over an alternative risk reduction proposal auto exhaust regulation when both regulations are hypothesized to cost the same and save the same number of lives such preference has a surprisingly broad demographic base however when the potential numbers of lives saved are different under the two programs almost 71 of the subjects preferred the regulation that saved the most lives regardless of the risk source

environmental pricing of externalities from different sources of electricity generation in chile abstract the rapid increase in electricity demand in chile means a choice must be made between major investments in renewable or non renewable sources for additional production current projects to develop large dams for hydropower in chilean patagonia impose an environmental price by damaging the natural environment on the other hand the increased use of fossil fuels entails an environmental price in terms of air pollution and greenhouse gas emissions contributing to climate change this paper studies the debate on future electricity supply in chile by investigating the preferences of households for a variety of different sources of electricity generation such as fossil fuels large hydropower in chilean patagonia and other renewable energy sources using double bounded dichotomous choice contingent valuation a novel advanced disclosure method and internal consistency test are used to elicit the willingness to pay for less environmentally damaging sources policy results suggest a strong preference for renewable energy sources with higher environmental prices imposed by consumers on electricity generated from fossil fuels than from large dams in chilean patagonia policy results further suggest the possibility of introducing incentives for renewable energy developments that would be supported by consumers through green tariffs or environmental premiums methodological findings suggest that advanced disclosure learning overcomes the problem of internal inconsistency in sb db estimates

foreign investment and economic growth characterization of a second best policy for welfare gains abstract this paper prescribes corrective taxes for immiserizing growth and customs union formation growth through removal of trade barriers when the home country and the rest of the world are financially linked through foreign investment and ownership of assets an always feasible policy which generates pareto welfare gains for home country residents and union countries residents is found with foreign ownership the policy generally requires a specific profits tax in addition to the usual taxes on traded goods and factors the policy does not harm residents in the rest of the world growth is pareto non inferior from the world point of view

estimation using contingent valuation data from a dichotomous choice with follow up questionnaire reply abstract our original article proposed that the two yes no willingness to pay wtp responses produced by this survey format should be viewed as a pair of jointly distributed correlated discrete random variables the comparison model the conventional approach to estimation using these types of data contained a programming error correction alters the results from the comparison model but our original claim that estimation by conventional methods can produce misleading inferences if ours is the appropriate specification still stands this is especially true if negative wtp is precluded when e wtp is calculated

elicitation format and sensitivity to scope this paper undertakes a systematiccomparison of the contingent valuation cv andchoice experiments ce methods andinvestigates the extent to which either of themare affected by insensitivity to scope this isachieved by undertaking separate cv estimatesof willingness to pay for two nested publicgoods both of which are explicitly included ina parallel ce survey the results indicate thatce values exhibit greater sensitivity to scopethan cv values ce gives significantly largerresults than cv for the more inclusive publicgood and significantly smaller results for theless inclusive public good

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

dynamic climate policy with both strategic and non strategic agents taxes versus quantities we study a dynamic game where blocs of fossil fuel importers and exporters exercise market power using taxes or quotas a non strategic fringe of emerging and developing countries consume and produce fossil fuels cumulated emissions from fossil fuel consumption create climate damages we examine markov perfect equilibria under the four combinations of trade policies and compare these to the corresponding static games taxes dominate quotas for both the strategic importer and exporter the fringe is better off under taxes than quotas because taxes result in lower fuel prices and less consumption by the strategic importer lowering climate damages

yes in my backyard spatial differences in the valuation of forest services and local co benefits for carbon markets in mexico forests provide many and large benefits including cost efficient climate change mitigation however international carbon markets have not stimulated the demand for forestry offsets domestic market mechanisms are emerging in many countries and forests could be highly valued through these policies as most of the benefits produced by forests are enjoyed locally here a choice experiment explores drivers of valuation and willingness to pay for forest carbon services in voluntary markets in mexico by comparing the valuation of citizens from four regions to test geographical preference for projects n 645 findings from multinomial logit models show valuation of forest carbon services is transferable and citizens would pay more for offsets from projects closer to their homes proximate forests provide a range of co benefits to local users including environmental services and opportunities for recreation factors related to valuation include sense of responsibility previous knowledge of carbon emissions previous visits to the sites regional identification and the valuation of local environmental services e g improvements in local air quality knowledge of spatial heterogeneity in valuation of the use of forest services can help to design market based instruments by identifying highly valued areas for environmental services programs and carbon markets

willingness to pay for renewable energy primary and discretionary choice of british households for micro generation technologies this paper documents the policy context of renewable energy production in the european union the research adopts a choice experiment approach to investigate households wtp for these renewable energy technologies in the uk the micro generation technologies comprise solar photovoltaic micro wind solar thermal heat pumps and biomass boilers and pellet stoves the study compares the results from conditional and mixed logit models which estimate the distribution of utility coefficients and then derives wtp values as a ratio of the attribute coefficient to the price coefficient with a model in which the wtp distribution is estimated directly from utility in the money space the results suggest that whilst renewable energy adoption is significantly valued by households this value is not sufficiently large for the vast majority of households to cover the higher capital costs of micro generation energy technologies

the possibility of recipient harming donor benefiting transfers with more than two countries the possibility of a commodity transfer among nations which simultaneously benefits the donor and harms the recipient is examined an example of a three country exchange economy is presented where a transfer may be made which gives the counter intuitive result the result is then explained

substitution effects in the valuation of multiple environmental programs abstract a theoretical framework for understanding substitution and complementary effects between environmental programs is derived a multiple program valuation function is specified and its structure analyzed a maximum likelihood estimator is derived to estimate the parameters of the valuation function using referendum type contingent valuation data the empirical analysis shows that the conventional benefit aggregation approach of independent valuation and summation overstates the benefits of two and three program policies by an average of 24 and 54 respectively

measuring the difference in mean willingness to pay when dichotomous choice contingent valuation responses are not independent dichotomous choice contingent valuation surveys frequently elicit multiple values in a single questionnaire if individual responses are correlated across scenarios the standard approach of estimating willingness to pay wtp functions independently for each scenario may result in biased estimates of the significance of the difference in mean wtp values this paper applies an alternative bivariate probit approach that explicitly accounts for correlation across errors in the estimation of wtp and mean wtp using data from three separate dichotomous choice contingent valuation studies this correlation is demonstrated to have an effect on the significance level of mean wtp difference tests

confidence intervals for evaluating benefits estimates from dichotomous choice contingent valuation studies i evaluate the potential usefulness of nonmarket valuation concepts and techniques from environmental economics for improving wildlife conservation the concepts include distinguishing between on site recreation use value and off site passive use or

combining contingent valuation and choice experiments a forestry application in spain when many good variants are to be valued like in several forest management programs which differ in the attribute levels the contingent valuation method may not be a practical option given the cost and time involved to value each variant separately there are at least three alternative procedures in such situations one i is to apply an attribute based valuation method like a choice experiment ce another ii is to conduct a cvm and a ce exercise and estimate a joint model a third one iii is to use the cvm estimates to value a base scenario and then use the ce results to adjust the cvm estimates for any new different scenario a numerical simulation and an empirical application to an afforestation program in spain show that the latter is the procedure that yields closer values to the cvm estimations followed by ii

trade theory distribution of income and immigration this paper examines the impact of mass immigration utilizing the analytical framework of so called trade theory as such its emphasis is on general equilibrium effects and on the constraints imposed by the openness of the economy on such effects the analysis will center on the distributional impact of unskilled labor immigration excerpt

what experimental protocol influence disparities between actual and hypothetical stated values preferences elicited in hypothetical settings have recently come underscrutiny causing estimates from the contingent valuation method to bechallenged due to perceived hypothetical bias given that the receivedliterature derives value estimates using heterogeneous experimentaltechniques understanding the effects of important design parameters onthe magnitude of hypothetical bias is invaluable in this paper we addressthis issue statistically by using a meta analysis to examine data from 29experimental studies our empirical findings suggest that on averagesubjects overstate their preferences by a factor of about 3 in hypotheticalsettings and that the degree of over revelation is influenced by thedistinction between willingness to pay and willingness to accept publicversus private goods and several elicitation methods

a comparison of alternative certainty calibration techniques in contingent valuation abstract a field test of two types of certainty calibration techniques in contingent valuation of public lands indicated that a 10 point certainty scale reduced wtp estimates by about half adjusting for uncertainty via a not sure option did not reduce wtp estimates but the variance increased there are several differences between these two ways of accounting for respondents uncertainty which may suggest why they provide different wtp value estimates and variances

willingness to pay for ancillary benefits of climate change mitigation assessing the willingness to pay wtp of the general public for climate change mitigation programmes enables governments to understand how much taxpayers are willing to support the implementation of such programs this paper contributes to the literature on the wtp for climate change mitigation programmes by investigating in addition to global benefits the ancillary benefits of climate change mitigation it does so by considering local and personal benefits arising from climate change policies the contingent valuation method is used to elicit the wtp for ancillary and global benefits of climate mitigation policies in the basque country spain results show that wtp estimates are 53 73 higher when ancillary benefits are considered

international capital mobility shadow prices and the cost of protection this paper studies the welfare losses from tariff protection in a small open economy when some factors are internationally mobile our principal result is that international fictor mobility must raise the cost of protection more specifically the welfare loss resulting from a uniform increase in tariffs in a competitive small open economy is greater when tariff induced international factor movements take place than when factors are internationally immobile by contrast an exogen1ous inflow of factors in the presence of tariffs may increase or reduce the welfare loss associated with protection depending on whether or not the protected commodities use the foreign owned factors intensively relative to domestically owned factors these results are proven for a very general specification of the economy s technology in particular no restrictions are placed on the degree of vertical integration in production on the sectors into which factors are internationally mobile or on the number of goods and factors our main result holds whether or not an increase in tariff rates leads the economy to specialise in addition we show how our results relate to earlier work on immiserising capital inflows and on negative shadow prices for factors of production thus synthesizing a number of recent results within a common framework the paper is organised as follows in section 2 we explain our framework and derive expressions for the welfare effects of tariffs when all factors are domestically owned and when some factors are foreign owned but not internationally

strength of preference indicators and an ordered response model for ordinarily dichotomous discrete choice data abstract recent environmental regulations raise the importance of accurate survey based methods to estimate environmental values while interviewing costs stimulate research to improve dichotomous choice survey methods this paper proposes using strength of preference indicators along with dichotomous contingent response data we model strength of preference indicators as quasi cardinal measures using an ordered response model we find that strength of preference indicators provide substantial efficiency gains while increasing respondents effort minimally with evidence that interpersonal comparison of preference ratings induces no bias the ordered response model of utility and willingness to pay is superior even in predicting the binary choice results

choice modeling and tests of benefit transfer choice modelling cm is a stated preference technique that is increasingly being used to generate estimates of non market values in cm applications respondents to a survey are presented with several sets of options which contain common attributes but at varying levels and are asked to select their preferred alternative from each set the information provided by respondents choices is used to estimate marginal rates of substitution and hence estimates of value in this paper the results from three separate cm applications are presented estimates are made of the value of improving the quality of wetlands the first two applications focused on the gwydir wetlands in new south wales australia one survey was conducted in sydney a major urban centre and the second was conducted in moree a rural centre close to the gwydir wetlands the third survey which was also conducted in sydney focused on the macquarie marshes another wetland in new south wales an objective of the study was to test the suitability of using cm derived estimates for benefit transfer both across different populations and across different wetlands cm is potentially suited to benefit transfer because it is possible to allow for differences in environmental improvements between sites as well as differences in socio economic characteristics between respondent populations several tests aimed at determining the validity of transfers using cm across sites and populations are presented these include tests of the equality of models implicit prices and estimates of compensating surplus

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

welfare aspects of the transfer problem using the standard trade model with three countries and allowing for substitutability in both production and consumption this paper demonstrates that a country may gain by giving a transfer that the receiver may lose and that these two phenomena may appear at the same time this result is an extension of gale s example in a fixed coefficient model where he shows both transferer and transferee may become better off harming the third country and it is contrasted with the traditional welfare proposition whereby a giver is immiserized and a recipient is enriched

on the tying of aid to tariff reform this paper considers the welfare effects of foreign aid that is tied to changes in the recipient s tariff by constructing a three country model with tariffs and by allowing for changes both in the amount of aid and in the tariff rates we are able to consider the welfare implications of two different rules of aid conditionality i a rule which leaves the donor s welfare unchanged and ii a rule which leaves the recipient government s total revenue unchanged it is shown that the tying of aid to a tariff reform can inter alia be used to ensure pareto improvement

the possibility of an immiserizing transfer under uncertainty in a two country two commodity trade model with production uncertainty an international transfer can harm the recipient and benefit the donor this result holds even when equilibrium prices are stable moreover the form in which the transfer is paid can matter for the welfare consequences of the transfer

attribute causality in environmental choice modelling when selecting attributes in environmentalchoice modelling studies preference should begiven to those attributes that aredemand relevant policy relevant andmeasurable the use of these criteria willoften result in a short list of environmentalattributes of which some are causally related the inclusion of attributes that have a cause effect relationship may stimulate somerespondents to seek to understand the causalrelations among attributes in order to assigngreater meaning to the alternatives andpotentially simplify the decision makingprocess this may have implications for theweights they assign to each of the attributeswhen identifying the preferred alternatives and subsequently for the implicit prices and orwelfare estimates a test of the impact ofincluding an attribute that causesimpacts on ecosystem health as well as anattribute relating to ecosystem health effectson parameter estimates implicitprices and welfare estimates is conducted twoquestionnaires are developed one with the causal attribute included and one without acomparison of results indicates that when the causal attribute is included in the vector ofchoice attributes the implicit value of asingle endangered species falls by 34 per centwhilst no significant difference is detected inthe parameter estimates importantly however estimates of compensating surplus for a givenpolicy package do not differsignificantly across the two treatments thisimplies that to the extent that the inclusionof a causal attribute reduces the implicitprices for one or more of the effect attributes the associated loss in utility isapproximately offset by the utility nowassociated with the new attribute

aid and trade this paper surveys the recent theoretical and empirical literature that explores the relations between aid and trade and asks about the complementarity or substitution effects at work we distinguish between the effects of aid on trade flows and on trade policies of the donor as well as the recipient countries special focus is given on trade facilitation or aid for trade

willingness to pay for carbon offset certification and co benefits among high flying young adults in the uk voluntary carbon offsets represent a growing share of the carbon market as a whole and have the potential to contribute to meeting greenhouse gas emissions targets and reducing anthropogenic climate change certain offset project types may also deliver co benefits including safeguarding or promoting biodiversity supporting human development and poverty reduction and enabling market and technology development in low carbon sectors these co benefits might encourage consumers to participate in the voluntary offset market depending on their effects both on consumers willingness to pay wtp for offsets and on implementation costs however the offset market is not yet sufficiently developed to give a clear indication of consumer wtp for offsets with varying attributes this exploratory stated preference study therefore uses a choice experiment to estimate wtp for certified and uncertified offsets with or without these specific co benefits in an aviation context it is to the best of our knowledge the first to do so our results suggest that uptake of voluntary offsets may be encouraged by investing in projects with co benefits and by emphasising those co benefits to consumers they also suggest that certification regimes will add value to offsets helping compensate for increased costs provided that consumers are made fully aware of them

sequencing and nesting in contingent valuation surveys abstract the term embedding is ill defined and has been applied to distinct phenomena some predicted by economic theory and others not this paper lays out a theoretical framework for looking at these phenomena and provides a set of well defined terms included is a discussion of survey design problems which may induce spurious evidence in favor of the hypothesis that respondents are insensitive to the scope of the good being valued an empirical example of the component sensitivity is provided this test rejects the hypothesis that respondents are insensitive to the scope of the good being valued

welfare effects of aid under quantitative trade restrictions the paper examines the effects of tied aid on the welfare of both the donor and the recipient countries we depart from the previous literature by assuming preexistence of quantitative trade distortions to mitigate these distortions the donor country provides aid that is tied to the rationed good conditions for the presence of the transfer paradox and of the enrichment of both countries are derived and interpreted under the stability of the system furthermore we show that whereas untied aid cannot increase global welfare tied aid unambiguously does so

foreign aid and public goods abstract most less developed countries ldcs use foreign economic aid to finance public consumption goods or public intermediate inputs this paper constructs a two country general equilibrium trade model where an income transfer that takes place between the two countries is used by the recipient to finance a public consumption good within this framework the paper identifies the conditions under which the income transfer improves or deteriorates the donor country s terms of trade and shows that the transfer can be welfare enriching for the donor and welfare immiserizing for the recipient country the paper also demonstrates that the transfer can raise reduce world welfare in which case a welfare increase decrease in both the donor and the recipient country is possible

willingness to pay for energy saving measures in residential buildings this paper uses a choice experiment to evaluate the consumers willingness to pay for energy saving measures in switzerland s residential buildings these measures include air renewal ventilation systems and insulation of windows and facades two groups of respondents consisting respectively of 163 apartment tenants and 142 house owners were asked to choose between their housing status quo and each one of the several hypothetical situations with different attributes and prices the estimation method is based on a fixed effects logit model the results suggest that the benefits of the energy saving attributes are significantly valued by the consumers these benefits include both individual energy savings and environmental benefits as well as comfort benefits namely thermal comfort air quality and noise protection

prospects for the use of choice modelling for benefit transfer abstract many of the earliest studies that sought to test the validity of benefit transfer which typically involved the use of contingent valuation or travel cost applications produced negative findings one of the recommendations from this early testing was to trial alternative methods to produce source studies for benefit transfer including multi attribute techniques subsequently there have been a number of studies conducted that have sought to test the validity of benefit transfer using choice modelling the purpose of this paper is to review these studies and to assess the current state of knowledge regarding the validity of using choice modelling for the purpose of benefit transfer we also describe and consider the merits of an alternative approach for extending the use of choice modelling in benefit transfer bayesian benefit transfer

stated versus revealed knowledge determinants of offsetting co2 emissions from fuel consumption in vehicle use abstract this paper examines the role of prior knowledge in offsetting co2 emissions from fuel consumption in vehicle use the main result of our econometric analysis on the basis of unique representative data from drivers license holders in the usa and germany refers to the strong discrepancy between the stated and revealed knowledge of co2 offsetting the revealed knowledge measured by the correct estimation of the costs for this offsetting practice has a positive impact on the stated purchase of corresponding offsetting credits in both countries in contrast the effect of the stated knowledge of offsetting is not robust and in some cases even negative surprisingly it cannot even be confirmed that drivers license holders who claim that they are more than sufficiently informed estimate these costs more accurately

the global impact of information technology abstract the paper explores the impact of information technology on the worldwide distribution of income employment and growth a review of the empirical literature is used to quantify the impact of information technology on productivity in different sectors and groups of countries an economic model of the global economy is then used to calculate the possible impact of information technology on international and domestic distribution and employment a number of alternative possibilities are considered i industrial countries are the most successful in introducing the new technology ii the technology turns out to be capital saving rather than labor displacing iii the rate of diffusion to developing countries increases iv the small scale and decentralizing potential of information technology is exploited the calculations suggest that indirect effects arising from international and intersectoral competition are at least as important as direct effects and that the distribution of gains from information technology depends as much upon what technology is introduced as on where it is introduced

immiserizing transfer under variable returns to scale this paper examines the welfare consequences of a unilateral transfer for both the transfer paying and the transfer receiving country in which the production functions are subject to variable returns to scale we obtain the conditions for the strong paradox that is the welfare of the transfer paying country improves and that of the transfer receiving country declines in the standard two country framework the conditions for the weak paradox that is both the transferor and transferee gain or lose simultaneously and the normal results that is the transferor loses and the transferee gains are also derived transferts appauvrissants quand les rendements a l echelle sont variables ce memoire examine les effets de bien etre d un transfert unilateral a la fois pour le pays donateur et le pays recipiendaire quand les fonctions de production ont des rendements variables a l echelle les auteurs d6veloppent les conditions qui sous tendent le paradoxe fort i e le cas oii le bien r ils d6rivent aussi les conditions qui sous tendent le paradoxe faible i e le cas oui les deux pays gagnent ou

income effects and paradoxes in the theory of international trade every field in economics has its paradoxes phenomena which initially are thought to confound economic sense but ultimately come to be better understood the field of international trade can claim its fair share the examples of the metzler paradox wherein a tariff fails to provide protection or that of immerising growth wherein a country suffers a loss in welfare despite an improvement in production possibilities come easily to mind more recently a reexamination of the transfer problem in the context of many country trade or of tax distortions has revealed possibilities for donor countries to gain or transfer recipients to lose results which would be considered so paradoxical in standard treatments as to be ruled out by stability arguments behind each of the examples just cited lies a rational explanation in which income effects prove crucial in supporting a paradoxical outcome in some situations the potential for paradox rests on the possibility of income redistribution nationally or internationally when tastes differ among the various trading participants paradox becomes impossible if tastes at the margin are identical in other instances income redistribution is not the crucial mechanism and paradoxical outcomes may occur even if all traders possess the same taste patterns all cases share the property that paradoxes can arise only if the terms of trade are sufficiently disturbed substitution effects high values of which serve to dampen the required adjustment of prices to a market disturbance thus work to prevent paradoxical outcomes in the first section of this paper i focus on those issues for which income effects are associated with income redistribution especially the analysis of tariffs and transfers in markets that initially are free of taxes or other distortions in the second section i analyse an issue for which income redistribution is no longer the central ingredient the welfare consequences of growth a standard technique in game theory allows for a reinterpretation of the growth case to reveal the fundamental connection between a wide variety of standard two country results in the theory of international trade and the possibility of paradoxes in the three agent transfer problem i would therefore argue that the three agent transfer literature has wider applicability than is commonly perceived in the final section i analyse briefly the frequently encountered argument that some instances of paradoxical welfare loss can be avoided by optimal tariff policy i wish to thank isaias coelho for helpful conversations makoto yano for stimulating my interest in the transfer problem with many agents and j peter neary for comments on an earlier draft useful suggestions were also received at seminar presentations at the institute for international economic studies in stockholm and the london school of economics research support was provided by the national science foundation grants ses 78o6159 and ses 8309386 i the role of substitution effects in transfer paradoxes with more than two commodities and agents is discussed by de meza 1983

on the provision of official and private foreign aid abstract the provision of official relative to private foreign aid varies considerably between donor countries we explain the variations in terms of country size household composition income distribution and the government s ability to commit to aid and derive inter alia the results 1 official aid crowds out private aid 2 total aid and official aid collected from each household are lower in more populous countries 3 total aid is lower if i the distribution of income favors the more altruistic households and ii the government can credibly commit to a certain level of aid evidences suggest that the theoretical results can explain stylized facts

efficient estimation methods for closed ended contingent valuation surveys closed ended contingent valuation surveys can be very useful in the evaluation of nonmarket resources respondents merely state whether they would accept or reject a hypothetical threshold amount either as payment for giving up access to the resource or as a fee for its use the authors develop a maximum likelihood procedure which exploits the variation in the threshold values to allow direct and separate point estimates of regression like slope coefficients and error standard deviations without truncation bias their illustration uses data from a survey of recreational fisherman to examine factors which influence individuals willingness to pay copyright 1987 by mit press

analysing the social benefits of soil conservation measures using stated preference methods the paper estimates the benefits of programmes to mitigate the off site impacts of soil erosion for a watershed in andalusia spain two stated preference methods are used namely choice experiments and contingent valuation to obtain estimates of the social benefit from soil erosion reductions under two different methodologies we emphasise the relative merits of the choice experiment method to provide useful inputs to policy design however employing both methods allows us to undertake a convergent validity test and thus to provide more defensible social benefit estimates the attributes used in the choice experiment include water quality impacts which we find to have the highest marginal values impacts on wildlife and the area subject to a control programme the contingent valuation design includes an attempt to reduce bias by reminding respondents about substitutes results are used to suggest upper limits on per hectare payments for soil conservation programmes

the multi country transfer problem abstract a general formula is derived for the welfare effects of a set of transfers among several countries in a two good model with production and substitution and compatible with walrasian stability the relation to recent work on transfer paradoxes is sketched

offsetting versus mitigation activities to reduce hbox co _ 2 emissions a theoretical and empirical analysis for the u s and germany this paper studies the voluntary provision of public goods that is partially driven by a desire to offset for individual polluting activities we first extend existing theory and show that offsets allow a reduction in effective environmental pollution levels while not necessarily extending the consumption of a polluting good we further discuss the impact of an increased environmental preference on purchases of offsets and mitigation activities several theoretical results are then econometrically tested using a novel dataset on activities to reduce hbox co 2 emissions for the case of vehicle purchases in the u s and germany we show that environmental preference triggers the stated use of hbox co 2 offsetting and mitigation channels in both countries however we find strong country differences for the stated purchase of hbox co 2 offsets while such activities are mainly triggered by a high general awareness of the climate change problem in the u s the perception that road travel is responsible for hbox co 2 emissions to a large extent is more important for driver s license holders in germany

a test of policy labels in environmental choice modelling studies abstract a question that arises in the application of environmental choice modelling cm studies is whether to present the choice sets in a generic or labelled form the former involves labelling the policy options to be presented to respondents in a generic way for example as option a option b etc the labelled approach assigns alternative specific descriptors to each option these may relate to the names of proposed policies different locations or any other policy relevant details both approaches have their advantages a potential advantage of using alternative specific labels is that respondents may be better able to base their choices on the true policy context this can increase predictive validity whilst at the same time reducing the cognitive burden of the cm exercise a potential advantage of the generic labelling approach is that respondents may be less inclined to base their choices wholly or largely on the labels and as a consequence may provide better information regarding trade offs among attributes the two approaches to choice set design are compared in the context of a cm study of the values of remnant vegetation in the desert uplands of central queensland results indicate a difference in the cognitive processes generated by choice models using the different approaches this difference is reflected in both the alternative specific constants and the taste parameters and cannot be accounted for by differences in error variance across the two treatments the implications for environmental valuation are discussed

a semiparametric smooth coefficient estimator for recreation demand we introduce a semiparametric smooth coefficient estimator for recreation demand data that allows more flexible modeling of preference heterogeneity we show that our sample of visitors each has an individual statistically significant price coefficient estimate leading to clearly nonparametric consumer surplus and willingness to pay wtp distributions we also show mean wtp estimates that are different in economically meaningful ways for every demographic variable we have for our sample of beach visitors this flexibility is valuable for future researchers who can include any variables of interest beyond the standard demographic variables we have included here and the richer results price elasticities consumer surplus and wtp estimates are valuable to planners and policymakers who can easily see how all these estimates vary with characteristics of the population of interest

international capital mobility and commercial policy in an economic region abstract if two small countries are linked by capital movements then at low tariff levels any increase in capital flows induced by the commercial policy of either country will harm that country and benefit the other country while at low levels of international investment a tariff increase always harms the country levying the tariff nevertheless an increase in one country s tariff could benefit both countries by alleviating regional distortions in factor allocation if the countries liberalize factor movements within a customs union then conflicts must arise in choosing the level of the common external tariff

bias in discrete response contingent valuation abstract the empirical literature on discrete response contingent valuation has found that seemingly innocuous changes in the statistical models estimated result in significantly different point estimates of willingness to pay this paper hypothesizes and tests several potential explanations for these results first it investigates and compares the biases inherent in single bounded and double bounded maximum likelihood estimation procedures and examines how they react to various bid designs and sample sizes then it examines the presence and identification of outliers in binary choice data and how these outliers influence estimation finally it presents an alternative approach to addressing the issue of outliers which explicitly acknowledges the possibility of upwardly biased response probabilities

the role of question order and respondent experience in contingent valuation studies abstract grand canyon white water boating was used to address issues in contingent valuation of question ordering and respondent experience question ordering effects were not identified for experienced boaters but did occur in some estimates for less experienced boaters an experience effect is further suggested if respondents value their actual white water trips differently than written scenarios of trips no effect was identified for experienced boaters but a significant difference did occur for less experienced boaters significant differences for less experienced boaters suggest that respondent experience may play a role in value formation resulting in survey instrument effects in valuation estimates

respondent uncertainty in a contingent market for carbon offsets abstract the main objective of this paper is to provide additional empirical evidence of what explains respondent uncertainty in contingent valuation cv and how this in turn affects stated willingness to pay wtp air travelers asked to pay a carbon travel tax to offset carbon emissions from flying were asked how likely it is that they will actually pay if the tax is voluntary when changing the market compliance imperative from a mandatory carbon tax to a voluntary contribution a third of all air travelers consider it unlikely they will actually pay their stated wtp amount an ordered probit estimation approach is applied to identify the sources of respondent uncertainty besides the bid price respondent sense of responsibility and belief in the effectiveness of the voluntary carbon market are among the main reasons for the experienced uncertainty

rural amenity values and length of residency new residents of rural communities are often assumed to have preferences for development and conservation that differ from those of longer term residents however the literature offers little to quantify presumed preference heterogeneity this article assesses whether stated preferences differ according to length of residency results are based on a conjoint choice experiment survey of rhode island rural residents heterogeneity according to length of town residency is modeled using dummy variables multiplicative interactions and lagrangian interpolation polynomials results are compared across the three models and identify a range of attributes for which willingness to pay depends on length of residency