intergenerational equity and sustainability abstract this paper explores the limitations of conventional economic analysis of intergenerational problems and examines some of the alternatives suggested in the literature it is argued that proper consideration of future generations has at least three requirements first when future costs and benefits are considered it should be taken into account that they are to be enjoyed by different generations second the sustainability requirement should be adopted this represents an equity commitment to the future and implies the recognition that future generations have the right to nondeteriorated ecological and economic capacity the paper studies the ways in which the recognition of these rights might be incorporated into economic evaluation and management third an appropriate institutional network to enforce the recognition of these rights in decision making processes should be constituted its design and necessary functions are also analyzed

creating the u s dollar currency union 1748 1811 a quest for monetary stability or a usurpation of state sovereignty for personal gain the desirability of politically creating currency unions among otherwise sovereign states is an ongoing debate a key backdrop in this debate is the supposed empirical success of the u s dollar currency union the fact that otherwise sovereign states within the united states are not constitutionally allowed to issue their own currency thus creating a single currency for the whole united states the u s dollar is the archetype that underlies many policy choices and recommendations such as the creation of the european currency union and the condemnation of the separate currencies issued by individual states within argentina during their recent crisis the benefits of the u s currency union and by analogy the benefits of other politically manufactured currency unions are assumed to be obvious namely a reduction in monetary instability and exchange rate transaction costs within the union thereby stimulating long run economic growth these alleged benefits for the united states however are not derived from market evidence but from simple theoretical assertions and from a literature that takes as fact the rhetoric of the winning side at the u s constitutional convention independent of theory and rhetoric little is known about how and why the u s currency union was created or about whether it improved macro performance these deficiencies are addressed here prices indices exchange rates and market generated transaction data from 1748 through 1811 are used to determine when the market moved from state currencies to the u s dollar and to assess the nonwartime performance of prices exchange rates and purchasing power parity before versus after this transition this evidence suggests that the u s currency union had more to do with usurpation of state sovereignty by rent seeking bankers than with solutions to monetary instability and transactions costs

sustainability policy and environmental policy a theoretical representative agent economy with a depletable resource stock polluting emissions and productive capital is used to contrast environmental policy which internalises externalised environmental values with sustainability policy which achieves some form of intergenerational equity the obvious environmental policy comprises an emissions tax and a resource stock subsidy each equal to the respective external cost or benefit sustainability policy comprises an incentive affecting the choice between consumption and investment and can be a consumption tax capital subsidy or investment subsidy or a combination thereof environmental policy can reduce the strength of the sustainability policy needed more specialised results are derived in a small open economy with no environmental effects on utility

nonrenewable resource scarcity nonrenewable resource theory often is summarized by hotelling s rule this paper reviews theoretical extensions and empirical investigations of resource extraction models observed data are often inconsistent with the hotelling rule suggesting that other characteristics of nonrenewable resource supply including exploration heterogeneous ore quality technological progress and capital investment are important determinants of the dynamic behavior of resource prices given the persistent recurrence of concern about nonrenewable resource scarcity measures of nonrenewable resource scarcity and the empirical evidence for the time trends of those measures are reviewed finally the implications of nonrenewable resource scarcity for economic growth are examined

sustainability and externalities is the internalization of externalities a sufficient condition for sustainability in an important contribution in ecological economics van de bergh 2010 correctly concludes that sustainability does not imply zero externalities however he continues with the delphic statement delphic statements were uttered by the renowned oracle of ancient greece at delphi they were phrased in such a way as to be self fulfilling because alternative interpretations covered every possibility without externalities the problem of sustainability vanishes if this statement refers to an impossible economic process that produces no externalities then he is right however it might be interpreted as stating that whenever environmental policy internalizes environmental externalities then sustainability will be ensured in this note i assert that in the real world where externalities prevail their internalization or neutralization in the traditional way cannot lead to sustainability only if internalization takes a very specific form that results in the inviolable preservation of environmental rights of future generations in pure biological terms can sustainability be ensured after revised the original commentary i resubmit it the issues raised by the editor have been carefully considered

valuation of non priced amenities provided by the biological resources within the monteverde cloud forest preserve costa rica abstract to quantify the economic benefits of the monteverde cloud forest preserve and to test the contingent valuation method in a third world setting a contingent valuation survey was designed with five experimental treatments these determined an overall expected value per visitor determined and compared two ways of eliciting value single versus annual lump sum payments and compared average values of costa rican versus non costa rican visitors visitors were willing to pay to prevent the preserve s conversion to agricultural uses monteverde s value as a cloud forest preserve appears much higher than any value it might have in agricultural use despite lower incomes costa rican visitors valued the preserve more highly than non costa rican visitors visitors may have differentiated only weakly between greatly differing bid amounts expected values derived from econometric analysis of the differing experimental treatments suggest that further methodological adaptation of the contingent valuation method may be required 1 when it is applied in third world settings and 2 when precision is critical in estimating wtps

exhaustible resource allocation in an overlapping generations economy abstract this paper analyzes competitive allocations of an exhaustible resource in an overlapping generations economy conditions are given for the existence of equilibrium extraction rules such that both extraction and investment in future stocks are increasing and continuous in the current stock the paper then considers the time paths of equilibrium allocations and shows that there are economies where equilibrium resource extractions and prices exhibit nonclassical behavior this is illustrated through a finite horizon example in which extractions increase and prices decrease over the entire time horizon and an infinite horizon example where there are persistent cycles in extractions and prices and multiple equilibria the paper concludes by examining welfare issues

environmental tax policy and intergenerational distribution abstract we study the effects of environmental taxation within the context of an overlapping generations model the quality of the environment is modelled as a durable consumption good introduction of the environmental tax harms old existing generations and benefits young existing generations as well as all future generations increasing the tax in a pareto improving manner is easier the higher the pre existing tax the reverse holds if tax policy is decided by majority rule a suitably designed bond policy can be used to redistribute the efficiency gains due to the internalisation of environmental externalities across the generations

reconciling sustainability and discounting in cost benefit analysis a methodological proposal abstract the incorporation of the intergenerational equity objective has rendered the traditional cost benefit analysis cba approach obsolete for the evaluation of projects presenting an important number of environmental externalities and for those whose impacts extend throughout a long period of time based on the assumption that applying a discount rate rewards current consumption and therefore that it is only possible to introduce a certain intergenerational equity in a cost benefit analysis in this work we propose an approach to discounting based on a different rationale for tangible and intangible effects we designed two indicators of environmental profitability a the intergenerational transfer amount ita which quantifies in monetary units what the current generation is willing to pass on future generations when an environmental restoration project is carried out and b the critical environmental rate cer measures the implicit environmental profitability these concepts were tested through an empirical case study pertaining to the assessment of an erosion control project in the southeast of spain the results yield traditional profitability indicators that are higher and probably closer to the real values set by the contemporary society the information provided by the environmental profitability indicators proposed renders more transparency to the quantification of the levels of intergenerational equity applied thereby facilitating the difficult reconciliation of the cba technique with the objective of sustainability

towards an operational sustainability criterion abstract this paper examines the concept of sustainability and its implications for environmental policy analysis it builds on the premise that present society holds a moral obligation to pass on a world of undiminished life opportunities to members of future generations maintaining life opportunities in turn can be achieved by maintaining or improving a diverse set of resources and capabilities that support a person s freedom to define and pursue her own conception of the good life on an operational level this framework points to the following guideline for environmental policy protecting the rights of future generations requires either the conservation of environmental resources or compensatory measures including the provision of substitute technologies that ensure the fair and proportionate sharing of net benefits over intergenerational time scales in this framework resource depletion is permissible only if with reasonable certainty it would generate a pareto improvement relative to a baseline scenario involving strict resource conservation

sustainability and the intergenerational distribution of natural resource entitlements abstract the paper describes an olg economy with a single exhaustible resource that has amenity value the steady states of this economy form a continuum implying path dependency we compare three policy scenarios first a zero extraction policy of enforced conservation that avoids environmental degradation possibly at the expense of intertemporal efficiency second a grandfathering policy that endows the present generations with all resources and that ensures efficiency but cannot prevent a persistent decline in lifetime utility from one generation to the next third a trust fund policy where future generations receive claims for the natural resource of the three only the trust fund ensures efficiency and protects welfare of all generations

uncertain climate change and the international policy response abstract the implications of alternative policy responses to uncertain climate change are analyzed within the context of a simple dynamic economic model the analysis emphasizes two sources of uncertainty that surround climate change scientific uncertainty about how greenhouse gas emissions affect the climate and natural climatic variability the analysis also incorporates an economy s ability to mitigate climate changes through emissions reductions as well as its ability to adapt to such changes through adjusting production decisions while the model is very stylized and excludes some broader issues of social optimality and the allocation of rights to resources across generations basic implications of uncertainty in a dynamic world are highlighted that have not been previously discussed these results suggest that analysts will have a difficult time trying to determine whether a certain emissions strategy improves economic efficiency whether the benefits are greater than the costs when uncertainty is explicitly incorporated into the analysis

i struggled with this money business respondents perspectives on contingent valuation abstract in the long running debates about the validity and legitimacy of contingent valuation cv very little research has engaged directly with respondents during or after the survey to explore what individuals willingness to pay wtp figure meant this paper presents the results of qualitative research with respondents to a cv survey carried out as part of the appraisal of a specific nature conservation policy in the uk the results show that respondents questioned the validity of their wtp figures through discussion of the difficulties they experienced in framing a meaningful reply significant difficulties included problems in contextualising what the scheme was and how much it might be worth in both monetary and non monetary terms an inability to work out a value for one scheme in isolation from others in other parts of the uk and feelings that values for nature were not commensurable with monetary valuation turning to the legitimacy of cv participants in the research challenged claims that cv is a democratic process for ensuring that public values are incorporated in policy decisions recognizing that hard economic choices have to be made in order to achieve nature conservation goals participants argued for a decision making institution where local people could contribute to environmental policy decisions through dialogue with scientists and policy makers in the final part of the paper this project is compared with three studies that have also used qualitative approaches with respondents during and or after a cv survey the paper concludes that more context specific qualitative research with respondents is needed to explore further the conclusion that cv may not be a good methodology for capturing complex cultural values for nature and landscape

intertemporal equilibria and exhaustible resources an overlapping generations approach abstract this paper presents a general equilibrium model of an abstract intertemporal economy with overlapping generations production possibilities and capital investment under the constraint of a nonreproducible natural resource the model provides for institutionally mandated asset transfers between successive generations under the assumption that each generation has perfect foresight concerning future prices and economic conditions competitive exchange supports a multiplicity of pareto efficient equilibria that correspond to particular asset transfer regimes the achievement of a desirable distribution of welfare between present and future generations requires that the asset transfer regime be chosen according to a social welfare function or explicit distributional criterion economic efficiency per se is insufficient to ensure social optimality these results have important implications for resource planning in the real world where policy makers and the public at large are often highly concerned over the potential impacts of current resource utilization on the welfare of future generations

scale prices and biophysical assessments abstract in a recent forum on biophysical assessments a number of ecological economists expressed serious reservations about the use of prices to assess the appropriate scale of macroeconomic systems while such reservations are warranted the preference for biophysical assessments over prices indicates that many ecological economists are focussing on one notion of scale and neglecting another altogether there are two notions of scale that are critical to achieving sustainable development sd one is the maximum sustainable macroeconomic scale the other is the optimal macroeconomic scale the maximum sustainable scale is the largest macroeconomic scale that can be sustained by a throughput of matter energy that is within the ecosphere s regenerative and waste assimilative capacities the optimal scale is a preferable macroeconomic scale and is one that is not only sustainable but one that maximises the net benefits of economic activity biophysical assessments are needed to determine the maximum sustainable scale because ecological sustainability is a biophysical problem not an economic problem thus it is through biophysical assessments that the necessary restrictions on the incoming resource flow can be calculated and imposed however since the achievement of an optimal macroeconomic scale is an economic problem albeit a constrained economic problem relative prices are required to efficiently allocate the sustainable resource flow so the macroeconomy can adjust to the optimum failure to recognise the two notions of scale and the most appropriate means of their assessment is likely to thwart rather than advance the movement toward sd

the value and applicability of bargaining in an intergenerational setting abstract this paper considers the effectiveness of a variation of coasian bargaining as a policy instrument for internalizing one or multiple intergenerational externalities the variation involves appointing a contemporary party to represent the interests of the affected parties who are currently unable to represent themselves potential criticisms of such a policy are considered and addressed and precedents to such a policy are put forth to test the value of such a policy a two period model in which two externalities exist in the production consumption decisions and with representative agents is used to compare the welfare effects of four scenarios 1 agents in each period optimize their period specific utility 2 a benevolent social planner chooses allocations in both periods to maximize a social welfare function 3 the externalities are internalized using a bargaining policy and 4 the externalities are internalized using a tax and subsidy policy i find that contrary to general consensus in the literature coasian bargaining can be adapted in such a way as to make it applicable in an intergenerational framework

nonparametric estimation of the impact of taxes on female labor supply this paper proposes a simple extension of nonparametric estimation methods for nonlinear budget set models derived in blomquist and newey 2002 to censored dependent variables the nonparametric method is applied to estimate female labor supply elasticities using data on married women from the 1985 and 1989 waves of the panel study of income dynamics exploiting the substantial variation in budget sets caused by the tax reform act of 1986 as a source of identification the estimated wage elasticities from this new method are 0 56 overall and 0 27 on the intensive margin the income elasticity estimates are close to 0 67 overall and 0 13 on the intensive margin compared with the linear labor supply model the estimated elasticities are usually larger for the nonparametric specifications that account for nonlinear budget sets copyright 2010 john wiley sons ltd

economics and sustainability balancing trade offs and imperatives the concept of sustainability has been increasingly invoked in scholarly and public policy debates discussion has been hampered however by uncertainty and lack of uniformity in the meaning of sustainability this paper seeks to identify some common ground among economists ecologists and environmen tal ethicists two issues seem salient require ments for intergenerational and the defi nition of social capital to be provided to future generations a concept of safe minimum standard which has received at least some recognition in the ecology philosophy and eco nomics literatures may provide the beginnings of a common ground for debate about sus tainability jel q2

state currencies and the transition to the u s dollar reply including a new view from canada farley w grubb 2003 provides an explanation of the rhetoric and behavior of the founding fathers regarding the monetary clauses put in the u s constitution which is consistent with the quantitative evidence on price indices exchange rates and the incidence of currencies used in market transactions both before and after the 1787 constitutional convention ronald w michener and robert e wright 2005 henceforth mw challenge this explanation they assert that the burden of proof in this debate should fall on revisionists among whom they rank grubb 2003 grubb 2003 however is well within the mainstream of scholarly historiography from charles a beard 1913 to robert a mcguire 2003 which treats the founding fathers as classand self interested rational maximizers rather than altruistic heroes indeed i will show that mw s position is outside the scholarly mainstream lacks adequate proof and yields inconsistent dubious and unpalatable results mw in their capital objection assert that the quantitative evidence used by grubb 2003 reflects unit of account rather than medium ofexchange money and so cannot support the monetary interpretation given to it by grubb 2003 mw however offer no objective criteria for determining when a record reflects unitof account versus medium of exchange money by contrast grubb 2004a 2005 presents objective and conservative criteria for such determination colonists converted values into unitof account money when summing across numerous barter goods and currency transactions involving different monies thus merchant account books bank records government accounts and statements about economy wide aggregates cannot be safely used to trace the medium of exchange in use because they may just reflect unit of account money unregulated one off transactions between strangers however which often explicitly record different monies within the same transaction are more likely to reflect the actual medium of exchange in use grubb 2003 2004a 2005 uses only this latter evidence to infer shifts in the medium of exchange mw do not mention this point but readers need only consult grubb 2004a 2005 on this issue

in defense of health based standards abstract this paper explores the utilitarian ethical foundations underlying two standards for pollution control an efficiency standard and a health based standard the main point is that a health based standard can be defended quite easily on utilitarian grounds safety proponents need not be self serving irrational nor ignorant criticism of health based standards as too costly is not always persuasive since material consumption is not the only component of social welfare nor do consumption increases necessarily increase social welfare

an overlapping generations model with exhaustible resources and stock pollution this paper analyzes the nexus between resource exhaustion and pollution externality using an overlapping generations framework where each generation lives only for a finite period for a finite horizon model with production where there are many agents per generation the pareto inefficiency arises due to lack of intragenerational coordination and is propagated across generations the tax rates necessary for correcting this externality are characterized we also derive a modified hotelling rule according to which the equilibrium resource price rises slower than the rate of interest in order to account for the damages due to the pollution stock generated by the resource used for the case where the externality induced damage acts on production rather than the utility function pareto inefficiency is shown to persist even when there is intragenerational coordination

intergenerational transfers and the social discount rate this paper investigates the relationship between intergenerational asset transfers and the choice of the discount rate for use in cost benefit analysis in a model of a competitive overlapping generations economy constrained by a socially managed exhaustible resource provided that there are no distortions in capital markets and that all agents hold perfect foresight cost benefit techniques will result in a pareto efficient resource allocation if the discount rate is set equal to the market rate of interest but since the path of the interest rate depends on the level of intergenerational transfers cost benefit techniques do not ensure a socially desirable distribution of welfare between generations a social optimum will result only if intergenerational transfers are properly chosen and enforced decentralized private altruism may result in intergenerational transfers that both present and future individuals would agree are too small if members of the present generation attach positive weight to the general welfare of future generations not simply their personal descendants in a world where intergenerational transfers are non optimal second best policy making may imply a constrained optimum that is inefficient together these findings suggest that cost benefit analysis is at best a partial criterion to policy formulation that should be used only in conjunction with ethical principles that define the proper distribution of welfare between present and future generations

towards a fair constructive and consistent criticism of all valuation languages comment on kallis et al 2013 we provide critical notes to the paper by kallis et al 2013 on monetary valuation we evaluate the four criteria they propose for assessing valuation studies we argue that no clear distinction is made between monetary valuation and pricing instruments the selected criteria are more relevant to assessing policy than monetary valuation the examples provided are not representative of the diversity of valuation studies encountered in the literature moreover no clear examples are provided of where valuation and associated cost benefit analysis of environmental policy go wrong we plea for a more fair constructive and consistent criticism of all valuation languages and offer relevant issues for consideration

the limits of monetization in valuing the environment a reply to gsottbauer et al we welcome the attention of gsottbauer logar and van den bergh thereinafter glv to our contribution however their critique misrepresents what our article was trying to do so it merits a response our article offered a framework for assessing the conditions under which one may or may not engage with processes that value nature in money terms glv argue that first we confuse monetary valuation methods with pricing policies and that most of what we have to say may be relevant for the latter but not for the former second they argue that the assessment criteria we propose are either obvious or unconvincing third they contend that the examples we give to illustrate the applicability of our criteria are not representative and finally they suggest that our concern with whether a particular monetary valuation study or pricing policy contributes to enclosures and neo liberalism is ideological an

limits to economic growth as shown by a computable general equilibrium model abstract economic growth is distinguished from commercial growth and is defined in this article as the growth of the value a society puts in monetary terms on all commercial and non commercial goods and values it possesses during a certain period a computable general equilibrium model is used to show the impact of changes in the endowments preferences and production possibilities on economic income which in the model comprises all wealth besides land with its natural resources and labor energy is the key endowment to drive an economy the model leads in an intuitive way to the following conclusions 1 societies should start to use appropriate indicators for true economic growth rather than just for commercial growth as measured by gross national product 2 all types of economic growth are limited no matter if based on endowment growth production efficiency growth or changes in preferences 3 economic growth should be oriented more towards increasing production efficiency and less towards using more natural resources 4 human population growth puts at risk the possibilities for average economic growth per person 5 we should get better prepared to use solar energy in the future 6 besides economic growth there exists pure utility growth which is not measurable in monetary terms it includes much of scientific progress in the long run and is of great importance even though it cannot be included in an indicator of economic growth

forestry and the bequest motive abstract with an overlapping generations model for trees and humans it is shown that in a small open timber producing economy both in a setting where the economy is planned in order to maximize an intertemporal social welfare function and in a decentralized market economy long term forest investments should be evaluated by their net present value this is so provided that the existing generation has some if even very small concern for the well being of the next generation a review of empirical studies among nonindustrial private forest owners in the u s and in sweden gives support to the suggestion that this mechanism based on a tinge of altruism may be more important in promoting long term silvicultural investments than the incentives given by existing land markets

semiparametric estimation of selection models some empirical results among the central theoretical developments in the econometric analysis of nonexperimental microeconomic data has been the analysis of selectivity bias following the work of james heckman 1974 statistical techniques were developed in the 1970s to consistently estimate the parameters of these models one potential drawback to the application of these techniques is their sensitivity to the assumed parametric distribution of the unobservable error terms in the model in recent years a number of estimation methods for selection models have been developed which do not impose parametric forms on error distributions these methods are termed semiparametric since only part of the model of interest the regression function is parametrically specified while the statistical theory of these semiparametric estimators has received much attention practical applications of the methods are lacking an exception being the paper by joel horowitz and george neumann 1987 in this paper we use semiparametric methods to reanalyze data on the labor supply of married women first studied by thomas mroz 1987 using parametric methods the object of this reanalysis is to determine whether mroz s results are sensitive to his parametric assumptions

the political economy of environmental policy with overlapping generations a two sector overlapping generations model illuminates the intergenerational effects of a tax that protects an environmental stock a traded asset capitalizes the economic returns to future tax induced environmental improvements benefiting the current asset owners the old generation absent a transfer the tax harms the young generation by decreasing their real wage future generations benefit from the tax induced improvement in environmental stock the principal intergenerational conflict arising from the tax is between generations alive at the time society imposes the policy not between generations alive at different times a pareto improving tax can be implemented under various political economy settings

dimensions of sustainability geographical temporal institutional and psychological well being depends on produced goods natural amenities and preferences each can be influenced through policies and education production of goods exhibits a hierarchical structure similar to ecosystems subsystems adapt while sustaining system productivity that is higher levels have greater resilience in agriculture the farm has little adaptability the region can shift production among locations and a nation can shift among regions forests exhibit an intertemporal geographical hierarchy in which harvests are replaced by growth elsewhere and later regrowth this structure is useful in responding to change and uncertainty preferences too can and must be informed through education

economic indicators of resource scarcity a critical essay abstract the theoretical arguments of the conceptual and empirical literature on economic indicators of long run resource scarcity are logically flawed if resource allocators were informed of the nature of resource scarcity their behavior and the economic indicators it generates would reflect the scarcity but if they were so informed we could simply ask them if resources were scarce if they are not informed their behavior and economic indicators are as likely to indicate their ignorance as the reality unfortunately there is no way of knowing whether they are informed or not unless we already know whether resources are scarce

common property equality and development the appeal of common property ideas may be traced in large measure to the fact that they seem to embody widely held values of equality on the other hand empirical examination of common property institutions reveals that they can coexist with significant inequality in this paper the relationship between common property and equality is examined it is argued that the role of common property can only be understood in the context of the associated private property institutions common property in agriculture is interpreted as part of a system based on small scale peasant proprietorship of arable land common property institutions provide a method of capturing scale economies and thereby increasing the efficiency of small scale proprietorship in competition with large scale production based on wage labor

sustainability economics general versus specific and conceptual versus practical we clarify the definition and interpretation of sustainability economics baumgartner and quaas 2010 in response to recent comments by van den bergh 2010 bartelmus 2010 and others for that sake we distinguish between general and specific definitions of sustainability and sustainability economics as well as between conceptual and practical approaches

the role of energy economists in promoting sustainable energy development abstract the role of energy in pursuit of policies seeking sustainable development is crucial correspondingly the work of energy economists will be affected in many traditional areas of analysis and will require enhanced scope and new expertise this would lead to a better understanding of the place of natural resources in the production process better delineation of trade offs between avoidance of ecological degradation and economic stagnation and more interdisciplinary feedback

disaggregated economic impact analysis incorporating ecological and social trade offs and techno institutional context a case from the western ghats of india economic valuation of ecosystem benefits and their aggregation in a benefit cost analysis bca framework is the norm in mainstream environmental economics but valuation and bca have also attracted criticisms internal criticisms point to the absence of alternative scenarios in valuation overlooking of ecological trade offs and dis services and inattention to context others criticize aggregation across diverse stakeholders and the problem of non monetizable benefits and dismiss bca as fatally flawed they suggest approaches such as deliberative decision making and multi criteria analysis we propose a middle path that uses the strengths of economic analysis for decision support while avoiding the pitfalls we disaggregate economic impacts by stakeholder groups link ecosystem changes to benefits as well as dis benefits and examine how socio technological context shapes the magnitude of economic impact we illustrate this approach by studying the impact of creating the biligiri rangaswamy temple wildlife sanctuary in the western ghats forests of southern india our analysis shows that while some stakeholders are net beneficiaries others are net losers changes in forest rights irrigation technologies and ecosystem dynamics influence the magnitude of benefits and sometimes convert gainers into losers such disaggregated analysis can provide useful information for deliberative decision making and important academic insights on how economic value is generated

the assumption of equal marginal utility of income how much does it matter abstract in most applied cost benefit analyses individual willingness to pay wtp is aggregated without using explicit welfare weights this can be justified by postulating a utilitarian social welfare function along with the assumption of equal marginal utility of income for all individuals however since marginal utility is a cardinal concept there is no generally accepted way to verify the plausibility of this latter assumption nor its empirical importance in this paper we use data from seven contingent valuation studies to illustrate that if one instead assumes equal marginal utility of the public good for all individuals aggregate monetary benefit estimates change dramatically

the ideology of efficiency searching for a theory of policy analysis the potential pareto improvement criterion and other measures of economic efficiency do not pass the test of consistency and coherence within economic theory nor do such measures accord with what public decision makers seek in policy advice from economists such efficiency measures are nonetheless durable components of the ideology of economics in general and benefit cost analysis in particular the objectivity of the policy scientist has been confused with the objectivity of the science while economic efficiency has no claim to objectivity the policy scientist can be an objective analyst of policy choices

is sustainability optimal examining the differences between economists and environmentalists abstract this paper examines a number of possible explanations for the apparent differences between economists and environmentalists concerning economic growth and sustainable development some of the differences are well known and relate to issues such as resource scarcity intergenerational equity and the composition of social capital however our analysis finds that while economic notions of optimal growth and the techniques of benefit cost analysis have important advantages for evaluating complex tradeoffs because they are quantifiable they may have potentially serious drawbacks as well the paper focuses on two potential sources of bias in the use of welfare economics for social choice first there is a conservative reinforcement in benefit cost analysis which is likely to produce biases against policy interventions to protect a degraded environment second and perhaps more importantly the aggregation of individual willingness to pay as a measure of social benefits is shown to be invalid in the case of positional goods where the demand for the good reflects the desire of individuals to raise their own relative standing this error may cause the economic calculus to be biased against non positional goods including non rival goods such as environmental resources these biases further complicate the already strained assumptions in utilitarian based welfare economics that by relying on revealed preference and consumer sovereignty are unable to distinguish between or apply different weights to the satisfaction of different categories of preferences furthermore because the dynamic consequences of even small biases in judging social optimality may give rise to large social costs or advance an unsustainable path there is a danger in relying solely on a potentially biased measure of welfare as a basis for guiding social choice the paper concludes by suggesting that efforts to correct these drawbacks of economic analysis are likely to result in approaches to sustainable development that narrow the apparent differences between economists and environmentalists

toward a new welfare economics for sustainability the debate over various definitions of sustainability has for the most part been conducted within the framework of traditional welfare economics discussion has centered on technical issues imbedded within the functional forms of various optimization models especially the coefficient of the elasticity of substitution and the social discount rate two more basic problems are 1 intractable theoretical difficulties within welfare economics call into question the results of traditional models of sustainability regarding intergenerational welfare and 2 equating per capita consumption with welfare contradicts empirical evidence suggesting that the link between happiness and wealth income is relatively weak alternative approaches to measuring well being are being developed and these have great potential to move the sustainability debate forward

policies for sustainability lessons from an overlapping generations model discounting is often considered inimical to sustainability reliance on the assumption that endowments regulate the transfer of assets to the future in standard growth models interprets the interest rate in the intergenerational context as a partial reflection of myopia a more complete market model that allows agents from different generations to engage in long term contracts with one another severs the movement of capital to the future from the endowment assumption adherence to the endowment assumption as a de facto market structure not simply a modeling convenience endorses sustainability policies that injure the future

the sustainable residential water use sustainability efficiency and social equity the european experience abstract the present paper traces the operational conditions governing the sustainable use of water in cities towards this objective the paper first proposes a new comprehensive definition for the sustainable use of water next efficiency in use is proposed as a fundamental instrument in achieving sustainability in spite of prevailing opinions maintaining that sustainability and efficiency aim at different and probably conflicting objectives in this light several pricing modes that inhibit efficiency are examined and their effects are defined in this context egalitarian pricing which nevertheless prevents efficiency is also systematically evaluated until it is ascertained that it does not serve social equity in the use of water in the long run all the more the present paper advocates that certain egalitarian pricing systems such as the increasing block rates most prevalent at this time may have the reverse effect than the one intended and hence in the long run impose negative impacts on the welfare of low incomes as a result full cost prices are proposed as a necessary instrument for the sustainable use of water an instrument that promotes social equity in the long run the assumptions of the study are examined in a comparative analysis of representative european pricing systems and urban management modes

is aging harmful to the environment how does aging affect the environment we analyze this question using anoverlapping generations model featuring uncertain lifetimes andenvironmental externalities we show that whether aging is harmful to theenvironment depends on the curvature of utility function which ismeasured by the degree of relative risk aversion we also explore theimplication of the results for environmental policy in an aging society

using the fisherian concept of income to guide a nation s transition to a steady state economy abstract many ecological economists have long been advocating that industrialised nations should abandon their growth predilection and initiate the transition to a steady state economy to demonstrate how a nation s transition to a steady state economy might be usefully guided fisherian national income one of the best known indicators of sustainable economic welfare is calculated for australia for the period 1967 1997 also calculated for the study period is the changing physical scale of the australian economy by juxtaposing per capita fisherian income and the growth of the australian economy it is shown that australia surpassed its optimal macroeconomic scale in the mid 1970s while around this time australia began a transition to a lower rate of growth that arrested the steep decline in per capita fisherian income australia had reverted back to a high growth policy by the end of the study period it chose not to continue the deceleration towards a steady state economy a policy stance that is likely to be detrimental to the sustainable economic welfare enjoyed by the average australian

on sustainability and the economics of survival this paper investigates the implications of sustainability and survival strategies for economic analysis it reviews connections between the approaches used by economists and biological scientists in the study of survival the paper emphasizes the role of irreversibility and uncertainty in the investigation of sustainability issues implications of the results for the analysis of economic behavior are discussed

toward a more complete model of individual transferable fishing quotas implications of incorporating the processing sector abstract economic analyses of individual transferable quota itq fisheries management traditionally have focused on the harvesting sector however harvester decisions impact the economic performance of co dependent processing firms this paper incorporates both sectors in an analysis of the effect of itqs on commercial fisheries results show that as a consequence of season elongation under a harvester only allocation of fishing rights capital nonmalleability implies that processor quasi rents will be redistributed to harvesters these losses could promote political gridlock and jeopardize adoption of an itq policy unless they are fully compensated or unless redistribution is avoided by a policy superior initial allocation of rights to both harvesters and processors

intergenerational competitive equilibria under technological uncertainty and an exhaustible resource constraint abstract this paper presents a model of competitive intertemporal equilibrium in a finite horizon overlapping generations economy facing technological uncertainty and an exhaustible resource constraint individuals form rational expectations regarding future prices and economic conditions and income is redistributed from one generation to the next through government mandated lump sum transfers under uncertainty the relationship between resource price appreciation and the interest rate is mediated by consumers risk aversion with respect to consumption in alternative states of nature the intuitively appealing proposition that the expected resource price rises at the expected rate of interest holds only as a special case if future generations are taken to be state contingent in the sense that their composition depends on the states of nature prevailing when they are born then equilibria are generally pareto efficient but if future generations are state independent so that the set of individuals born at a given date is independent of the prevailing state of nature then equilibria may be inefficient because markets do not exist where successive generations may equilibrate their marginal rates of substitution across consumption in alternative contingent states such inefficiencies may be remedied through the implementation of appropriate intergenerational transfers an optimal intergenerational welfare distribution may be supported as a competitive equilibrium if the income transfer regime is properly selected and enforced the social optima that result for a simple version of the model under the maximin welfare criterion indicate that greater sacrifices are required on the part of the present generation when future generations are taken to be state contingent than when they are regarded as state independent this finding provides a possible explanation for the extreme risk aversion of conservationists with respect to the welfare of future generations

towards an ecologically based society a rawlsian perspective abstract this paper evaluates several contemporary environmental issues using the standard of john rawls theory of justice rawls has systematically criticized the kind of utilitarian thought that has dominated recent discussions about natural resources and the environment some environmental analysis of late has made use of rawls ideas by focusing on a single aspect of rawls philosophy the difference principle governing treatment of the disadvantaged to the exclusion of other important rawlsian principles selected strands of rawls thought of particular relevance to environmental concerns are reviewed and assessed here particularly the concepts of time preference public goods and social savings as well as the difference principle these ideas are then employed as yardsticks to assess contemporary environmental concerns in three areas 1 water use in the sub humid american west 2 u s federal timber policy and 3 energy and the international economy it is concluded that although rawls clarifies a number of difficult issues his ethical framework needs to incorporate explicit concern for the biophysical basis of society it is suggested that a next step is the recognition that each generation needs to transmit to the following generation a healthy sustainable and aesthetically pleasing natural world

parametric and semiparametric estimation of sample selection models an empirical application to the female labour force in portugal this paper applies both parametric and semiparametric methods to the estimation of wage and participation equations for married women in portugal the semiparametric estimators considered are the two stage estimators proposed by newey 1991 and andrews and schafgans 1998 the selection equation results are compared using the specification tests proposed by horowitz 1993 horowitz and hardle 1994 and the wage equation results are compared using a hausman test significant differences between the two approaches indicate the inappropriateness of the standard parametric methods to the estimation of the model and for the purpose of policy simulations the greater departure seems to occur in the range of the low values of the index corresponding to a specific group of women copyright 2001 john wiley sons ltd

entitlements missing markets and environmental uncertainty reply abstract at one level dore and ward seem intent on immunizing received doctrine they say that i did not prove that rights violated nozick s principles of justice and that i did not prove that missing markets were the problem more telling they allege i did not prove that my story was better than the particular story favored by dore and ward that is they argue that there is an alternative approach based on the theory of public economics which is indeed operational 3 they then use the bulk of their comment to explain and defend this alternative model they hope to convince the reader that the model of public economics survives intact in the face of my alternative model to the extent that their model allows one to define the problem away it is not difficult to see why they find it so compelling more seriously dore and ward fail to make a coherent argument about the concept of rights and duties and the logic of a particular rights structure that happens to prevail they seem concerned that my article was tampering with some sacred social construct the status quo rights structure and that my article threatened the received wisdom of both public economics and paretian walrasian bliss indeed theirs seems to be a genuine fear that if economists release their grip on the certitude of received orthodoxy the floodgates will be open to all manner of bumbling regulators seeking to shift rights and wealth positions across generations my article is apparently threatening because it seems to suggest that the received wisdom may at times be misleading

state currencies and the transition to the u s dollar clarifying some confusions farley w grubb s recent papers on the early u s monetary system would be important contributions to the common currency area literature were not most of their historical assertions questionable and their key assumption that the medium of exchange can be inferred from the unit of account dubious we contend that after 1781 most americans eschewed government paper money in favor of full bodied coins and convertible bank liabilities and that contrary to grubb s claim bankers did not foist the constitutional clause banning state emissions onto an unsuspecting public

efficiency sustainability and global warming abstract economic analyses of global warming have typically been grounded in the theory of economic efficiency such analyses may be inappropriate because many of the underlying concerns about climate change are rooted not in efficiency but in the intergenerational allocation of economic endowments a simple economic model is developed which demonstrates that an efficient economy is not necessarily a sustainable economy this result leads directly to questions about the policy relevance of several economic studies of the issue we then consider policy alternatives to address global warming in the context of economies with the dual objectives of efficiency and sustainability with particular attention to carbon based taxes

smoothed binary regression quantiles this paper extends results regarding smoothed median binary regression to general smoothed binary quantile regression discusses the interpretation of the resulting estimators under alternative assumptions and shows how they may be used to obtain semiparametric estimates of counterfactual probabilities the estimators are applied to a model of labour force participation of married women in the usa we find that the elasticity with respect to non labour income is significantly negative only for women that belong to the middle of the conditional willingness to participate wtp distribution in comparing the quantile models with parametric logit and semiparametric single index specifications we find that the models agree closely for women around the centre of the wtp distribution but there are considerable disagreements as we move towards the tails of the distribution copyright 2006 john wiley sons ltd

environmental regulations and the problem of sustainability moving beyond market failure abstract the standard metaphor of market failure is an impediment to the crafting of environmental policy that can escape policy lock in sustainability requires a policy process that can avoid this lock in sustainability concerns the creation of dynamic human processes that can respond to indeed anticipate unanticipated feedback from biological processes

altruism evolution and welfare economics henrich clearly presents the convincing evidence that the evolution of prosocial preferences altruism and altruistic punishment is both theoretically possible and empirically present in human populations henrich convinces us using only the most restrictive arguments if one goes beyond the assumptions of one gene one trait or recognizes the existence of social cognition caporael 1997 the case for the existence of prosocial behavior is overwhelming furthermore while henrich is probably correct in saying that large scale social cooperation is unique to the human species mounting evidence suggests that prosocial behavior is also present in such diverse non human species as lions meerkats fire ants and arabian babblers clutton brock 2002 so why is the reaction against the notion of pure altruism so strong in both economics and biology a likely reason is that it goes against the dominant cultural belief in progress through competition among individuals both evolutionary biology and political economy matured in victorian england where darwin s careful and cautious argument for evolution by natural selection was recast as survival of the fittest a metaphor which fit the dog eat dog world of commercial society rugged individualism is reflected in the gene based reductionism of biology as well as the agent based reductionism of welfare economics bergh and van den gowdy 2003 in his contribution henrich establishes the theoretical basis for cultural group selection based on large scale cooperation he shows that the existence of prosocial behavior cannot be explained by individual based characteristic alone such as kin selection reciprocal altruism or costly signaling this does not contradict darwinian natural selection which can operate on any statistically reliable pattern patterns of culture may vary widely in human societies based on the different kinds of cultural transmission including conformist transmission a short cut to reliable information prestige based transmission punishment of non conformists and normative conformity by which people want their behavior to match that of the group the interplay between these kinds of cultural transmission and the in

migration incentives migration types the role of relative deprivation the authors explore the role of relative deprivation versus absolute income as an incentive for migration in developing countries in section i of this paper we outline the relative deprivation model of migration and present an illustration of the divergent policy implications of a relative deprivation model versus an absolute income model an attempt is made to identify distinct empirical implications of relative and absolute income motives for migrating in section ii a migration decision model is estimated and is used to explore absolute and relative income motives for internal and international migration in a sample of rural mexican households as well as to test the extent to which discontinuity in labour markets shapes the choice of migrant destination in section iii we present our conclusions excerpt

trust law sustainability and responsible action abstract the problem of managing for sustainability is marked by the need to make decisions on behalf of others and by the uncertainties that attend such decisions however the economic literature on sustainability has paid scant attention to how decisions on behalf of others might differ from decisions on behalf of oneself and when risk has been modeled explicitly the expected utility hypothesis has generally been used a generation acts sustainably if the expected value of the next generation s utility is not less than the present s this paper investigates how we think about responsibly acting on another s behalf by looking to the united states law of trusts because in important respects the current generation views its responsibility to the future as a trust relationship trust law illuminates responsible decision making under both risk and uncertainty even under conditions of risk more conservative action than would be suggested by the expected utility hypothesis is warranted because it emphasizes preservation of trust principal and disavows profit maximization trust doctrine indicates that special caution should be exercised in conditions of uncertainty finally resource economic concepts of strong sustainability the precautionary principle and the safe minimum standard of conservation are interpreted according to trust principles

limits and cycles of environmental policy the olg model analyzes emissions of an accumulative pollutant in a laissez faire economy and an economy regulated through a government controlled license market the government either takes the price on the license market as given or sells the licenses demanded at the cournot price the first type of regulation is called a liberal environmental policy and the second type a monopolistic environmental policy the forward looking temporary and the stationary equilibria as well as the pollution boundaries of the mechanisms are studied if people can choose between laissez faire and regulation or between the liberal and the monopolistic environmental policy regime then in general no steady state exists instead endogenous policy cycles can alternate between laissez faire and regulation or between liberal and monopolistic regulation

environmental abatement and intergenerational distribution this paper employs an overlapping generations model to explore the impact of public abatement on private investment and the intergenerational distribution of welfare whereas public abatement benefits old generations in terms of non environmental welfare future generations gain most in terms of environmental welfare the overall benefits tend to be smallest for generations born at the time of the unanticipated policy shock public debt policy however can be employed to ensure that welfare gains are distributed more equally across the various generations such a policy implies that natural capital crowds out man made capital

parametric and semi parametric estimation of the binary response model of labour market participation this paper compares the familiar probit model with three semiparametric estimators of binary response models in an application to labour market participation of married women this exercise is performed using two different cross section data sets from switzerland and germany for the swiss data the probit specification cannot be rejected and the models yield similar results in the german case the probit model is rejected but the coefficient estimates do not vary substantially across the models the predicted choice probabilities however differ systematically for a subset of the sample the results of this paper indicate that more work is necessary on specification tests of semiparametric models and on simulations using these models

justifying precautionary policies incommensurability and uncertainty abstract when decisions are taken in conditions of keynesian or knightian uncertainty and when there is a threat of serious or irreversible environmental damage the precautionary principle is often recommended to guide decision making however the precautionary principle has been widely criticised in response to these criticisms a qualitative version of the precautionary principle is developed which draws its normative content from a blend of formal decision theory and political philosophy it is argued that precautionary action can be justified by some flexible combination of uncertainty and incommensurability the greater the uncertainty the less incommensurability is required to justify precautionary action and vice versa throughout the paper the arguments are explored using the example of climate change decision problems

searching for sustainability the poverty of spontaneous order abstract traditional approaches to sustainability rely on models that depend upon judgments of welfare across future generations right prices and some sense as to what future persons will find giving of utility these models both accept the spontaneous order of market processes and rely on that order to derive optimal consumption paths into the future sustainability is however not a problem of divining optimal paths predicated upon right prices rather sustainability to be operational requires a prior constructed order predicated upon rights for future persons and duties for those now living who sit in a position as dictator over the settings and circumstances that will be passed on to future persons rights based approaches to sustainability do not rely upon unknowable preferences of future persons but rather upon an environmental regency in which those now living agree to preserve settings and circumstances for the future this reminds us that the issue of sustainability concerns not how much to preserve but what to preserve

intergenerational equity and environmental decisions a model using rawls veil of ignorance abstract four general strategies for resource use exploitationism conservationism naturalist preservationism and extensionist preservationism are sketched and a two step model for deciding resource policy issues is proposed the model based on a modification of rawls hypothetical rational decision model posits a self interested chooser who decides the rules constituting a fair society in the first stage the chooser places pre emptive constraints on each generation s use of resources these constraints embodying leopold s conception of whole ecosystem health limit the options available to individuals of any generation in the pursuit of economic welfare in the second stage each generation may choose a strategy of resource use from those possibilities fulfilling the first stage constraints it is argued that a exploitationism is not in general an acceptable strategy because it violates constraints that would be imposed on all generations by a chooser who is ignorant regarding the generation he will inhabit b extensionist preservation which recognizes values inherent in wild species and natural ecosystems provides no operationalizable guide for environmental policy c conservationism fails to protect the biotic heritage of future generations because applications of the sustainable yield criterion can cause simplification and eventual breakdowns of natural ecosystems and therefore d a broadly naturalist preservationist strategy which imposes constraints on the pervasive exploitation of ecological systems and thereby protects biological diversity in the long run would be chosen by the rational chooser who is ignorant of the generation he will inhabit

the economic growth debate what some economists have learned but many have not one thing economists should have learned from the economic growth debate is the importance of defining the term growth by growth i mean quantitative increase in the scale of the physical dimensions of the economy i e the rate of flow of matter and energy through the economy from the environment as raw material and back to the environment as waste and the stock of human bodies and artifacts by development i mean the qualitative improvement in the structure design and composition of physical stocks and flows that result from greater knowledge both of technique and of purpose simply put growth is quantitative increase in physical dimensions development is qualitative improvement in non physical characteristics an economy can therefore develop without growing just as the planet earth has developed evolved without growing neoclassical growth models notwithstanding there is good evidence that neither the earth s surface nor the flux of solar energy grows at a rate equal to the rate of interest in fact they seem not to grow at all yet qualitative evolution occurred and continues to occur two general classes of limits to growth in the above defined sense can be further distinguished biophysical limits and ethicosocial limits in both cases it is growth not development that is limited there may or may not exist limits to development but that is another topic standard neoclassical economics was built on the assumption that the economy is far from both limits i e that it is always biophysically possible and ethicosocially desirable for aggregate product to grow as abramowitz l put it echoing pigou

the impact of economics on environmental policy abstract environmental economists have seen their ideas translated into the rough and tumble policy world for over two decades they have witnessed the application of economic instruments to several environmental issues including preserving wetlands lowering lead levels and curbing acid rain this essay examines the impact of the rise of economics in the policy world on the making of environmental policy i focus on two related but distinct phenomena the increasing interest in the use of incentive based mechanisms such as tradable permits to achieve environmental goals and the increasing interest in the use of analytical tools such as benefit cost analysis in regulatory decision making i argue that economists and economic instruments have had a modest impact on shaping environmental health and safety regulation but that economists will play an increasingly important role in the future although the role of economics is becoming more prominent it does not follow that environmental policy will become more efficient this apparent inconsistency can be explained by the political economy of environmental policy

irreversibility and uncertainty cause an intergenerational equity efficiency trade off abstract two important policy goals in intergenerational problems are pareto efficiency and sustainability i e intergenerational equity we demonstrate that the pursuit of these goals is subject to an intergenerational equity efficiency trade off our analysis highlights two salient characteristics of intergenerational problems and policy i temporal irreversibility i e the inability to revise one s past actions and ii uncertainty of future consequences of present actions in human environment systems we employ a two non overlapping generations model that combines an intragenerational production decision on the use of circulating capital and a non renewable resource with a negative intergenerational externality as an unforeseen contingency if initially unknown problems become apparent and policy is enacted after irreversible actions were taken policy making faces a fundamental trade off between ex post pareto efficiency and sustainability that is one can achieve either one of these two goals but not both

an overlapping generations model of growth and the environment this article analyzes the potential conflict between economic growth and the maintenance of environmental quality in an overlapping generations model short lived individuals make decisions which have long lasting effects on both factor productivity and the environment the model provides a theoretical explanation of observed correlations between environmental quality and income whereby economic growth is associated first with declines then improvements in environmental quality it suggests circumstances in which multiple pareto ranked steady state equilibria may arise and in which sustained growth of both capital and environmental quality may occur overmaintenance of the environment analogous to dynamically inefficient overaccumulation of capital may emerge copyright 1994 by royal economic society

the paretian liberal paradox and ecological economics abstract two of the most basic considerations in collective choice are the pareto principle and some minimal protection of individual rights in his impossibility theorem sen 1970 shows that there is a potential inconsistency between preference sovereignty as expressed by the pareto condition and the protection of minimal rights a liberal or liberty condition the paretian liberal paradox plp and the extensive debate surrounding it prompts serious reconsideration of the traditional welfare economics approach the critique of welfarism made by the plp is of central importance for environmental issues given pervasive externalities missing markets uncertainty and potential irreversibilities making collective choice decisions on these issues may require using explicit non utility information and restricting individual preference sovereignty we explore the implications of the plp for long term environmental policy and the transdisciplinary field of ecological economics as a simple pedagogical device relying on sparse principles the plp stimulates an increased awareness of the potential conflict between preferences and rights recognition of the plp focuses attention on what counts as admissible information in collective choice rules for example consideration of the plp illuminates differences in the informational requirements of alternative sustainability concepts

intergenerational resource rights efficiency and social optimality the discipline of economics is generally defined as the science of the allocation of scarce resources between competing social objectives given an initial distribution of resources between economic agents how would they behave so as to improve their welfare according to the pareto criterion the agents would exchange commodities until the opportunities for fruitful exchange were fully exhausted and no agent could be made better off without rendering at least one other agent worse off pareto efficiency is a powerful concept in microeconomic analysis provided that the initial distribution of property rights is equitable allocative efficiency gives rise to the best of all possible worlds acknowledging that the assumptions of perfect competition are often violated firms are monopolistic information is incomplete and externalities exist economists have argued for the modification of institutions so that economic reality will conform more closely to the assumptions of the model that yields such gratifying results but microeconomic theory has always maintained that allocative efficiency is in itself insufficient to maximize social welfare bator 1957 a social welfare function is required to discriminate a social optimum among the array of efficient allocations that correspond to alternative assignments of property rights though economists have posited alternative functional forms for the sake of pursuing conceptual arguments welfare functions have remained elusive constructs for well known theoretical and practical reasons consequently a sharp line of demarcation has been drawn between questions of efficiency the province of economics and equity the principal focus of ethical and political discourse in resource economics however the line demarcating efficiency and equity is often crossed the term optimal depletion appears regularly where only efficient depletion is meant while political debates about resource exploitation over time are laden with questions of the proper distribution of our natural patrimony between generations resource economists have predominantly espoused particular use rules that guarantee efficiency but overlook potential improvements in social welfare achievable through the reassignment of property rights across generations we document the evolution and current status of the misuse of the term optimal depletion in section ii we develop a simple two generation three period general equilibrium model in section iii to illustrate how alternative distributions of resource rights between generations relate to alternative pareto efficient solutions in section iv we demonstrate how different social welfare functions affect the optimal solution and associated assignment of resource rights between generations

excessive environmental risks an intergenerational market failure abstract this paper cautions against the belief that markets work efficiently in transmitting across generations the right signals for investment decisions under risk overlapping generation models are used to show that the incompleteness of intergenerational insurance markets constitutes a market failure that leads to inefficient intergenerational investment decisions under risk early generations over diversify if they face risks that are larger than those of the following generation and could therefore be shared with them on the other hand if risks are increasing from generation to generation the current generation would under insure against those risks since the direction of the inefficiency depends on the nature of the risk assumed the policy implications depend on the empirical assessment of the risks that current and future generations are facing this paper provides applications of the general result to environmental problems such as inefficiently low protection against global warming the excessive reduction of biodiversity and inefficient depletion of a natural resource

unraveling the veil of fuzziness a thick description of sustainability economics this article provides a thick description geertz 1973 of sustainability economics baumgartner and quaas 2010a b have proposed as an alternative to ecological economics the new field of sustainability economics which has triggered various replies the purpose here is to order and to review these contributions building upon a literature review of sustainability economics the paper argues that the concept currently has more of a fuzzy and declamatory character the rhetoric mccloskey 1998 of sustainability economics contains general issues of sustainability economics externalities and the capability approach the article argues that it is currently not clear how the solutions for science and policy proposed by sustainability economics differ from those of ecological economics efforts should be directed towards further development of the theory and the operationalization of sustainability principles the systemic view of co evolutionary development social learning and sustainability economics normative underpinning merits more consideration in the debate about sustainability economics

sustainable forestry timber bequests future generations and optimal tax policy this paper analyzes harvesting and timber bequest behavior in a two period overlapping generations model where the government uses site productivity yield and inheritance taxation the ceteris paribus effects of forest and inheritance taxes are derived first then the paper discusses the optimal design of forest and inheritance taxes by assuming that intergenerational externalities are either absent or operative in the absence of intergenerational externalities it is optimal to use only the site productivity tax and not to introduce yield and inheritance taxes at all in the presence of intergenerational externalities the situation changes the paper demonstrates that the externality can be internalized by introducing either a yield tax or an inheritance subsidy or both if the government is able to use both at the same time it is desirable to use the yield tax to punish excessive harvesting and an inheritance subsidy to bribe to give bequests