the middle class collapse and the environment abstract the thesis that unequal societies are harmful to the planet was defended by boyce 1994 in a framework based on the unequal bargaining power between rich and poor our study reinvestigates this theory by removing any reference to power in order to study the conditions under which it can still occur we show that a middle class collapse can aggravate or alleviate the burden on the planet depending on income disparities and weight of upward vs downward mobility moreover the paper shows how an appropriate environmental policy can increase the political acceptability of a social one designed for mitigating the deleterious effects of a middle class collapse through the reduction of ex post income disparities

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

testing for asymmetric information in insurance markets the first goal of this paper is to provide a simple and general test of the presence of asymmetric information in contractual relationships within a competitive context we also argue that insurance data are particularly well suited to such empirical investigations to illustrate this claim we use data on contracts and accidents to investigate the extent of asymmetric information in the french market for automobile insurance using various parametric and nonparametric methods we find no evidence for the presence of asymmetric information in this market

gathering information before signing a contract a screening perspective a principal has to choose among several agents to fulfill a task and then provide the right incentives to perform it agents do not a priori know how competent they are for the task it is shown that the principal should propose a contract that leads the agents to gather information about their competence prior to signing the contract this insight is in sharp contrast with cremer and khalil j cremer f khalil gathering information before signing a contract american economic review 82 1992 566 578 who consider a setup with one agent or alternatively a setup with several agents in which the private information commonly applies to all agents it emerges because in our private value setup information acquisition accompanied by a proper screening device increases the chance that the principal will pick a competent agent c 2006 elsevier b v all rights reserved

challenges of responding to sustainability with implications for affordable housing abstract sustainability is one of the most contested ideologies of our time because everyone acknowledges that it must occur but no one can agree on what needs to change in response this is unsurprising because objecting to the goal of sustainability is like objecting to other inherently good goals like peace or freedom responses to sustainability exist on a long continuum with some interpreting sustainability to mean conservation at all costs and reduced economic growth while others suggest that the market will ensure sustainable outcomes eventually result further sustainability can be easily manipulated to justify predetermined outcomes there are indeed a multitude of conceptual and pragmatic challenges to operating on sustainability particularly when the scale shifts from a global goal to local action using the application of sustainability to affordable housing in australia as a case study this article argues that rather than limiting sustainable outcomes the existence of the sustainability debate which focuses on the many challenges is a positive indicator that sustainability may be attainable

contracting in the shadow of the law economic models of contract typically assume that courts enforce obligations based on verifiable events corresponding to the legal rule of specific performance as a matter of law this is not the case this leaves open the question of optimal contract design given the available remedies used by the courts this article shows that american standard form construction contracts can be viewed as an efficient mechanism for implementing building projects given existing legal rules it is shown that a central feature of these contracts is the inclusion of governance covenants that shape the scope of authority and regulate the ex post bargaining power of parties our model also implies that the legal remedies of mistake impossibility and the doctrine limiting damages for unforeseen events developed in the case of hadley v baxendale are efficient solutions to the problem of implementing complex exchange

economics ecology based communities and sustainability abstract this paper comments on the inadequacy of orthodox economics when communities perceive themselves as ecology based that is when they recognize that their livelihood depends upon living natural resources not surprisingly an economics largely developed in the context of a spatial a natural industrialization and designed to serve the interests policies and tools of the nation state is inadequate when addressing communities within the context of their regions and ecological systems the author suggests that a sustainability economics is needed and that its character can be better focused if based on a local and regional ecosystem perspective the critique is relevant to general economic praxis because all economies depend upon natural processes and all economic actors are socialized within communities an approach to development of a sustainability economics is suggested

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

double co2 and beyond benefits costs and compensation abstract economic decisions over what action if any to take concerning the greenhouse effect tend to revolve around the social discount rate implicitly the debate concerns how to attribute intertemporal weights to welfare and implies a moral stance that is rarely given explicit recognition refocusing on the outcomes of current actions emphasises the role of compensation a conflict is apparent between the view that the current generation need be unconcerned over the loss or injury caused to future generations because they will benefit from advances in technology investments in both man made and natural capital and direct bequests and the requirement to avoid harming the innocent changes in units of welfare cannot be viewed as equivalent regardless of their direction in general doing harm is not cancelled out by doing good the result is a rejection of the potential compensation principle which underlies the current economic stance and a reconsideration of the acceptability of compensation altogether the concept of human rights and a non utilitarian perspective are used to show how cost benefit analysis denies the existence of inalienable rights and economics limits the moral considerability of harm

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

optimal growth resource amenities and the preservation of natural environments this paper examines the conditions for which it is optimal to permanently preserve natural environments in which a productive natural resource is found the conditions are more restrictive than those previously indicated in the literature on the economics of natural environments increasing consumption and declining commodity prices are not sufficient to warrant permanent preservation the initial capital stock can be an important determinant of the optimal level of preservation in addition resource amenity values will increase the initial resource price and decrease the rate of growth of the resource price the natural world provides a variety of services to the human community natural resources are essential inputs in the production of goods and services in addition the natural world generates a variety of amenity services including the scientific recreational and aesthetic value of preserved natural environments krutilla 1967 krutilla and fisher 1975a this paper examines the impact of resource amenity values on the optimal growth of an economy which depends upon natural resource inputs for the production of goods and services in particular the paper examines the conditions under which it is optimal to permanently preserve some natural environments in which the productive resource is found the conditions which warrant permanent preservation are more restrictive than previously indicated by the literature on the economics of natural environments increasing consumption and declining commodity prices are not sufficient to warrant permanent preservation in addition the initial capital endowment can be an important determinant of the optimal level of preservation

sustainability as opportunity this paper explores the relationship between sustainability concepts and contractarian principles of distributional fairness a commitment to equality of opportunity between contemporaries entails that life opportunities should be nondiminishing from generation to generation defining sustainability as nondeclining utility is analytically suggestive but practically problematic given the uncertainties that surround future preferences and technologies life opportunities may be sustained however by providing future generations with specific endowments of reproduced capital technological capacity natural resources and environmental quality in this setting capital resource substitutions are defensible only if there is compelling evidence that they would benefit both present and future generations

can markets stimulate rights on the alienability of legal claims the alienability of legal claims holds the promise of increasing access to justice and fostering development of law i develop a principal agent framework where litigation funders provide expertise in reducing uncertainty in agents disutility of production the model leads to the counterintuitive prediction that litigation funders prefer cases with novel issues and social surplus is positively correlated with legal uncertainty consistent with the model court backlog court expenditures and a slowing in average time to completion are associated with third party funding cases with third party funding receive more citations and are reversed less often than comparable cases without such arrangements

corporate governance a critical comparison among international theories codes of best practices and empirical research as strong role played by the financial g lobalized market several countries have adopted rules and principles best practice codes to be shared among all co mpanies in order to provide tools to solve governance problems regulate relations among managers and shareholders this paper seeks to investigate american english german japanese and italian codes of conduct literature agrees that corporate governance archetypes are those anglo saxon and german japanese on the other hand the italian model represents an interesting case study these three models are based on different international theories agency stakeholder resource dependence and stewardship scholars maintain that the agency theory is the most valid of the theories with respect to the existence of international convergence processes thus the objective of the paper is twofold first of all we want to understand which international theory has been adopted by anglo saxon german japanese and italian codes secondly we wish to verify whether empirical research confirms principle efficacy contained in codes of corporate governance from a co mparat ive study among international theories and rules it would emerge that variables contained in the codes would be better explained and regulated under agency approach it should be noted however that each country in spite of the convergence processes towards a single standard of rules is affected by their social and economic background finally we could argue that empirical studies do not often explain critical success factors in the same way of codes although both are the result of best practices

some economics of global warming the greenhouse effect itself is simple enough to understand and is not in any real dispute what is in dispute is its magnitude over the coming century its translation into changes in climates around the globe and the impacts of those climate changes on human welfare and the natural environment these are beyond the professional understanding of any single person the sciences involved are too numerous and diverse demography economics biology and the technology sciences are needed to project emissions atmospheric chemistry oceanography biology and meteorology are needed to translate emissions into climates biology agronomy health sciences economics sociology and glaciology are needed to identify and assess impacts on human societies and natural ecosystems and those are not all there are expert judgments on large pieces of the subject but no single person clothed in this panoply of disciplines has shown up or is likely to this article makes an attempt to forecast the economic and social consequences of global warming due to anthropogenic greenhouse gases and attempting to prevent it

environmental valuation under sustainable development environmentalism has evolved since the 1960 s from a concern with the preservation of wilderness in the american experience to a concern over pollution of human habitat throughout the industrialized world northern anxiety spread to the loss of tropical rainforests and biodiversity in the south where environmentalism evolved further in an encounter with indigenous interpretations conditions and priorities by the late 1980 s climate change emerged as a central issue in a now global discourse on the relationship between environment and development the principle of sustainable development that current needs are to be met as fully as possible while ensuring that the life opportunities of future generations are undiminished relative to present is now widely accepted this paper illustrates that incorporating environmental values per se in decision making will not bring about sustainability unless each generation is committed to transferring to the next sufficient natural resources and capital assets to make development sustainable 11 refs 3 figs

different ways of knowing a communicative turn toward sustainability abstract despite the urgency of the ecological crisis the steady continuation of environmental degradation suggests that new ways of interpreting problems and acting with environmental integrity may need to be considered this paper draws on a broad range of contemporary theory to argue that the conventional conceptualization of environmental problems has remained a largely disciplinary based exercise that has relied on abstracting the environmental issues from their real world complexity a practical articulation of the main environmental narratives reveals self referential discourses whose disciplinary based practices have insulated these approaches from a broad range of contemporary theorising and different ways of knowing the dominance of these approaches in environmental policy development has led to the continued acceleration of environmental degradation despite widespread political and social interest in its abatement this paper provides a critique of methodologies derived from the assumptions of instrumental rationalism and contemplates the potential for alternative communicative approaches and strategies for dealing with environmental policy development and implementation it is argued that a communicative approach to planning for sustainability represents a more appropriate strategy for mobilising a currently impotent environmental movement a communicative approach by explicitly dealing with the assumptions and motivations of contested positions in the sustainability debate it is argued offers the most pragmatic way of developing change strategies to deal with the complex issues surrounding environmental policy development and implementation

italian corporate governance abstract the italian model of corporate governance is characterised by a high degree of ownership concentration both for unlisted and listed companies in the absence of an institutional framework facilitating more dispersed ownership as in the anglo saxon countries or mechanisms for financial supervision as in some continental european countries a limited degree of separation between ownership and control is achieved mainly by using pyramidal groups we analyse some of the effects of this organisational mode on firms financial structure and efficiency we report results on the effects of the limited protection of minority shareholders on the extent to which companies in pyramidal groups succeed in raising external finance and investigate how internal capital markets work in pyramidal groups we also present some results on the relationship between firms performance and governance structures

ecological thresholds a survey abstract the existence of ecological discontinuities and thresholds has been recognised by ecological economics as a key feature to take into account in the study of environment economy interactions this paper reviews some theoretical developments and empirical studies dealing with ecological phenomena involving non linear dynamics the literature about this issue reveals that there is abundant evidence of discontinuities and threshold effects as the consequence of human perturbations on ecological systems however due to the complexities involved the predictive capacity of ecology is limited and large uncertainties still remain

the social contingency of wants abstract economic models typically assume that individual wants are determined by forces exogenous to the economic system social psychology and consumer research in contrast support the view that the perceived benefits of goods and services are strongly affected by endogenously determined social norms we present a selective overview of the literature on the relationship between consumption and well being exploring the ways in which informal arguments from social science might be linked to formal models of economic behavior we find that the fixed preferences hypothesis leads to the systematic undervaluation of environmental services and the underprovisioning of environmental goods

the concept of joint production and ecological economics joint production is suggested as one of the conceptual foundations of ecological economics the notion of joint production springs immediately from the application of thermodynamics and has a long history in economic analysis considerations of joint production give rise to philosophical concerns relating to responsibility and knowledge the concept of joint production is easily comprehensible and is also constitutive and supportive of a range of concepts current in ecological economic thought 2001 elsevier science b v all rights reserved

on the intergenerational allocation of natural resources it is known hartwick and others that under standard assumptions a society that invests in reproducible capital the competitive rents on its current extraction of exhaustible resources will enjoy a consumption stream constant in time it is shown here that this result can be interpreted as saying that an appropriately defined stock of capital including the initial endowment of resources is being maintained intact and that consumption can be interpreted as the interest on that patrimony this seems like a useful rule of thumb for policy

legal fee restrictions moral hazard and attorney rents abstract when attorney effort is unobservable and certain other simplifying assumptions such as risk neutrality hold it is efficient for an attorney to purchase the rights to a client s legal claim however the american bar association model rules of professional conduct prohibit this arrangement we show that this ethical restriction which is formally equivalent to requiring a minimum fixed fee of zero can create economic rents for attorneys even though they continue to compete along the contingent fee dimension the contingent fee is not bid down to the zero profit level because such a fee does not induce sufficient attorney effort we thereby provide a political economy explanation for these restrictions

toward an economics of stewardship the case of climate abstract standard neo classical approaches to long term environmental problems such as climate change are unsatisfactory in relying on discounting in assuming an at least latent utilitarianism and relying on the measure of gross domestic product a framework built around trusteeship stewardship is set forth and advanced as a superior approach and its implications for climate stability drawn it is within a just emerging economics of stewardship that the tools of neo classical economics can help in finding the path to climate stability

one sided sustainability tests with amenities and changes in technology trade and population abstract if an economy with multiple consumption goods including environmental amenities uniquely maximises present value with constant discounting it is unsustainable at some time if either of two measures augmented net investment or the change in augmented green net national product are zero or negative then augmented denotes that time is treated as a productive stock which includes in each measure the value of future exogenous changes in technology or terms of trade adjustments are found to make each measure a test for individual sustainability when population grows exogenously the practical and philosophical rationale for testing sustainability in a present value maximising and therefore fully prescribed development path is discussed

the evolution of common law we present a model of lawmaking by appellate courts in which judges influenced by policy preferences can distinguish precedents at some cost we find a cost and a benefit of diversity of judicial views policy motivated judges distort the law away from efficiency but diversity of judicial views also fosters legal evolution and increases the law s precision we call our central finding the cardozo theorem even when judges are motivated by personal agendas legal evolution is on average beneficial because it washes out judicial biases and renders the law more precise our paper provides a theoretical foundation for the evolutionary adaptability of common law

gathering information before signing a contract after being offered a contract an agent has the possibility to observe the state of nature this enables him to refuse the contract in unfavorable states but burdens him with an observation cost the authors show that the principal offers a contract in which the agent has no incentive to observe the state of nature and they explore its terms later they show that the principal finds it profitable to organize competition between several agents even though he has monopoly power and can push a single agent down to his reservation utility copyright 1992 by american economic association

why the far distant future should be discounted at its lowest possible rate abstract a critical feature of the distant future is currently unresolvable uncertainty about what will then be the appropriate rate of return on capital to use for discounting this paper shows that there is a well defined sense in which the lowest possible interest rate should be used for discounting the far distant future part of any investment project some implications are discussed for evaluating long term environmental projects or activities like measures to mitigate the possible effects of global climate change

on the environmental discount rate abstract in this paper i show that environmentalism itself can provide a rigorous foundation for the low and declining discount rates that environmentalists seem to favor in long term cost benefit calculations if indeed it is a stylized fact that we are moving toward a world where environmental spending is increasingly important that scenario per se may significantly lower the social rate of return a formula is derived for the ratio of social to private discount rates as a simple function of two operational environmental parameters the formula is used to explain why the social rate of return ought to be lower than the private rate and why this gap called environmental drag when measured in terms of equivalent evaporation of national income may be expected to increase over time

path dependence in a ramsey model with resource amenities and limited regeneration this paper studies a ramsey optimal control economy with one consumer good extended to include several non renewable resources with amenity value the steady state equilibria of this economy are shown to form a continuum selection of the steady state to which the economy converges depends on the initial resource stocks hence unlike the usual ramsey models our model exhibits path dependency and postponement in the introduction of resource e ciency policies has long term e ects if the resource is renewable with a limited regeneration function the continuum becomes a turnpike that is optimal paths move along it towards the unique steady state the results also hold when there are several consumers 2003 elsevier b v all rights reserved

blockholdings in europe an international comparison abstract we preview empirical work by the european corporate governance network on the size of block shareholdings in europe the most salient finding is the extraordinarily high degree of concentration of shareholder voting power in continental europe relative to the u s a and the u k thus the relationship between large controlling shareholders and weak minority shareholders is at least as important to understand as the more commonly studied interface between management and dispersed shareholders

net national product as an indicator of sustainability net national product nnp can potentially serve several objectives among others to measure value added and to be an indicator of welfare in the aftermath of the world commission on environment and development however it also seems important to investigate whether the concept of nnp can serve as an indicator of sustainability my point of departure following hicks 1946 ch 14 is therefore to require that nnp should measure what can be consumed in the present period without reducing future consumption possibilities and in line with this to argue that the nnp should equal the maximum per capita consumption level that can be sustained if sufficiently many facilitating assumptions are made then a concept of nnp that serves as an exact indicator of sustainability can easily be constructed for instance for a closed economy with a constant population a stationary technology and with only one capital good it follows that the present does not reduce future consumption possibilities if and only if it does not decrease the stock of the single capital good hence under the assumption that the one capital good k is identical to the one consumption good x nnp defined as y x k measures the maximal sustainable consumption at time t because then x y is equivalent to k the purpose of this note is to establish that with multiple capital goods it is not in general possible to construct an exact indicator of sustainability on the

efficiency of conservationist measures an optimist viewpoint abstract we consider an economy with a consumer good capital a natural resource that provides amenity values and heterogeneous overlapping generations we compare a benchmark grandfathering policy that ensures efficiency through privatization with a policy of enforced resource conservation it is shown that i conservationist measures do not cause any pareto inefficiency irrespective of whether they pass a cost benefit test moreover it is shown that ii there exist pareto optimal allocations that can only be reached through resource conservation and not through competitive markets irrespective of compensating income transfers finally iii equivalence is demonstrated between strict resource conservation and non dictatorship of the present generations over future generations as formalized in chichilnisky s sustainable welfare function the results are shown to hold in both a first best and a second best setting

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

the effects of ageing and an environmental trust fund in an overlapping generations model on carbon emission reductions most currently employed integrated assessment models for climate change are of a dynastic nature they employ the ramsey rule linking the interest rate economic growth and the rate of pure time preference this paper argues that although a dynastic framework might be convenient for economic analysis it is restrictive and can be misleading overlapping generations models which do not employ the ramsey rule are more flexible and may give results different from those derived from dynastic models with the integrated assessment model alice 2 0 it is shown how various assumptions on demographic change and public institutions can affect the interest rate thereby influencing the efficient greenhouse gas emission reductions it is concluded that dynastic integrated assessment models are in many respects inappropriate for providing policy makers with quantitative figures about the costs of carbon dioxide emissions and their desirable reduction levels 2001 elsevier science b v all rights reserved

ecosystem services and regional development an application to sweden this study carries out interregional comparisons of development and sustainable use of natural capital with and without inclusion of non marketed ecosystem services a simple dynamic model of an open economy shows that appropriate adjustment of conventional income accounts includes flow and stock components but excludes explicit entrance of pollution calculations are made for swedish regions and for two types of ecosystem services pollution sequestration and recreational services provided by three types of ecosystems forests agricultural landscape and wetlands when comparing the adjusted and non adjusted regional income accounts it is shown that the two measurements generate significantly different pictures of regional income and growth regions that are traditionally considered as relatively less growth promoting are shown to hold important sources of wealth from natural capital while counties that are rich in conventional accounts fall behind when adjusting for values of changes in natural capital

fairness stewardship and sustainable development abstract the welfare economic concept of fairness offers an attractive axiomatic foundation for the popular notion of stewardship fairness emphasizes the ex ante equal standing of all persons across and within generations this highlights the inextracability of poverty alleviation and environmental sustainability especially in the agrarian tropics where biodiversity loss deforestation and desertification are growing global concerns

adverse selection in insurance markets policyholder evidence from the u k annuity market in this paper we investigate the importance of adverse selection in insurance markets we use a unique data set consisting of all annuity policies sold by a large u k insurance company since the early 1980s to analyze mortality differences among individuals who purchased different types of policies we find systematic relationships between ex post mortality and annuity policy characteristics such as whether the annuity will make payments to the estate in the event of an untimely death and whether the payments from the annuity rise over time these mortality patterns are consistent with the presence of asymmetric information in the annuity market we find no evidence of substantive mortality differences however across annuities of different size even though models of insurance market equilibrium with asymmetric information would predict such differences we also find that the pricing of various features of annuity contracts is consistent with the self selection patterns we find in mortality rates our results therefore suggest that selection may occur across many specific features of insurance contracts and that the absence of selection on one contract dimension does not preclude its presence on others this highlights the importance of considering the detailed features of insurance contracts when testing theoretical models of asymmetric information

renewable resources and economic sustainability a dynamic analysis with heterogeneous time preferences abstract in recent years there has been increasing interest in the study of economic sustainability and its relationship with natural resources this paper attempts to shed some light on the issue by taking into account the individual variations in time preferences for consumption and resource amenity we characterize the long run steady state analyze its asymptotic stability and explore the transational dynamics from any initial state the welfare implications of the optimal path are also discussed

a bibliometric account of the evolution of ee in the last two decades is ecological economics becoming a post normal science abstract in ecological economics the debate on formalism and formalization has been addressed in the context of a lively discussion on ecological economics as a post normal versus normal science using ecological economics ee as a seed journal and applying bibliometric techniques to all 2533 the articles published in ee from january 1989 to december 2009 we analyze the evolution of the field of ecological economics aiming to shed light on this debate we observe the predominance and increased relevance of certain research topics methodological issues policies governance and institutions and valuation moreover collective action technical change and the environment and values stand as emergent themes of research finally we note that ecological economics experienced an empirical turn reflected in a shift away from exclusively formalized papers towards exclusively empirical and to a larger extent formal and empirical ones the combination of the prominent and emergent topics and the empirical turn mirrors the increasing awareness among researchers in the field of the need to address a key specificity of ecological economics the interdependence of the economic biophysical and social spheres on this basis we argue that at least through the lens of ee ecological economics has evolved towards a post normal science

the rise fall and sustainability of capital resource economies in debates about green accounting it is sometimes argued that a positive value of aggregate investments indicates that an economy is developing sustainably asheim 1994 and pezzey 1994 have shown that this is wrong using a version of the well known dasgupta heal economy with one capital and one non renewable resource stock as a counterexample asheim s proof referred to the unproved assumptions that in such an economy a higher rate of time preference induces higher initial consumption and vice versa and that optimal consumption is initially rising and then falling here we show that these assumptions do hold true under certain circumstances thereby also proving some of dasgupta and heal s other conjectures about sustainability

what is sustainable development this paper introduces two axioms that capture the idea of sustainable development and characterizes the welfare criterion that they imply the axioms require that neither the present nor the future should play a dictatorial role in society s choices over time theorems 1 and 2 show there exist sustainable preferences which satisfy these axioms and provide a full characterization theorems 3 5 study a standard dynamical system representing the growth of a renewable resource economy give a turnpike theorem and exhibit the differences between sustainable optima and the ones according to discounted utilitarianism

how to be an ecological economist abstract to answer the question how to be an ecological economist we must start by defining the field of ecological economics mainstream economics altogether lacks the concepts required to deal adequately with nature justice and time it was the absence of these three concepts in this otherwise great social science that led to the establishment of ecological economics the interest in nature justice and time is its defining characteristic the main thesis of this paper is that our field is a fragile institution and that the professional existence of an ecological economist is no less fragile however this very fragility also represents freedom scope for free thinking conceptualising and research nevertheless to be able to really use and in turn enjoy the full scope of this freedom an ecological economist needs certain specific characteristics in particular what is termed in the german philosophical tradition urteilskraft and in english power of judgement a description of these characteristics is developed in this paper providing an answer to the question how to be an ecological economist

the incremental cost principle and the conservation of globally important habitats a critical examination abstract this paper examines the application of the incremental cost ic principle for the conservation of globally important habitats it first describes the characteristics of the ic and how it became an important financial modality in multilateral conservation efforts the application of the ic is then examined taking into account characteristics of successful collaboration efforts for the global environment the paper finds that as currently applied the ic fails to be a robust financial mechanism for protection of globally important habitats it also heavily skews the bulk of conservation costs from developed to developing countries the paper concludes with a description of suggested changes to make the ic an effective tool in global conservation efforts

an overlapping generations model of climate economy interactions a numerically calibrated overlapping generations model of climate change and the world economy is examined in this paper in the absence of intergenerational transfers efficient rates of greenhouse gas emissions abatement rise from 16 in the present to 25 in the long run while mean global temperature increases by 7 40c relative to the preindustrial norm a utilitarian optimum which attaches equal weight to each generation s life cycle utility yields abatement rates that rise from 48 to 89 with a long run temperature increase of 3 40c a second best utilitarian path in which intergenerational transfers are by assumption institutionally infeasible also supports stringent abatement measures i introduction the infinitely lived agent framework pioneered by frank ramsey 1928 has emerged as a central structure in the economics of climate change as characterized by ipcc 1996 working group iii climate change occurs when anthropogenic emissions of greenhouse gases principally carbon dioxide but also chlorofluorocarbons methane nitrous oxide and water vapor contribute to long term increases in mean global temperature potentially disrupting ecological systems and climate dependent production activities the best known study on the economics of this subject is nordhaus 1994 dynamic model of climate and the economy dice which incorporates assumptions regarding the costs and benefits of greenhouse gas emissions in a standard one sector growth model in nordhaus analysis a 50 reduction in greenhouse gas emissions would reduce gross world output by 0 93 a doubling of greenhouse gas concentrations relative to the preindustrial norm which is expected to occur by the middle of the twenty first century would reduce output by

on the economics of sustainability abstract the purpose of this paper is to work toward reconciliation of the neoclassical consumer choice axiom that more is better and the ecological concern that more is not sustainable the key is to divide the desired more into its rival and nonrival components for it is the consumption of rival goods such as plastic that strains the ecosystem in contrast the consumption of nonrival goods such as bird watching leaves little to no footprint while sustainability can be enhanced through changing preferences a menu of taxes subsidies and or vouchers can also motivate greater nonrival consumption and therefore sustainability without reducing consumer welfare

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

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

a meta analysis investigation of the direction of the energy gdp causal relationship implications for the growth degrowth dialogue abstract the complex relation between energy use and the economic process has long attracted attention issues such as the scarcity of energy resources energy theory of value degrowth and a growth approaches are closely related to the relationship between energy and development the present study traces the implications of the energy gdp causality dialogue for the context of the growth degrowth debate where the energy development link plays a decisive role in that context the present research investigates the possible existence of a fundamental macro direction of causality between energy use and economic growth that is not influenced by study specific characteristics and events towards this objective we perform a meta analysis that takes into account 158 studies on causality between energy and gdp covering the period 1978 2011 this is the first time to our knowledge that meta analysis has been applied to investigate the direction of the energy and gdp causal relationship the meta analysis results neither support the existence of a fundamental macro direction nor the so called neutrality hypothesis e gdp in the causal relationship between energy consumption and economic growth

intergenerational equity discounting and the role of cost benefit analysis in evaluating global climate policy when public policies with impacts far into the future are being debated the question inevitably is raised whether cost benefit analysis which discounts future costs and benefits is not biased against future generations and whether if such discounting is appropriate at all a lower rate should be used to avoid such bias the debate on global climate change is no exception this paper sketches and analyses the welfare foundations of cost benefit analysis and from this perspective analyses the role of cost benefit analysis in the climate policy debate particularly with reference to intergenerational effects the paper concludes that the cost benefit criterion cannot provide a definitive basis for deciding whether we should commit to a longer term programme to moderate climate change the issues of intergenerational equity are not that global climate change will significantly lower the gnp of future generations but relate to the possibility of science fiction like changes in the planet that will produce catastrophic effects in the future and the typical way in which the cost benefit problem is posed obscures the basic choices that we should be evaluating

conservationist government policies and intergenerational equity in an overlapping generations model with renewable resources abstract this paper shows that in overlapping generations models incorporating renewable natural resources competition may lead to perpetually declining living standards in environments in which it is technically feasible to achieve intergenerationally equitable distributions of consumption first and second best conservationist government policies are examined these include forced nationalization of the entire stock of natural capital government open market purchases and sales of natural capital taxation of industrial use of resources and subsidies to private investments in natural capital

sustainable development in a post brundtland world not yet two decades after the publication of our common future the world s political and environmental landscape has changed significantly nonetheless we argue that the concept and practice of sustainable development sd as guiding institutional principle as concrete policy goal and as focus of political struggle remains salient in confronting the multiple challenges of this new global order yet how sd is conceptualized and practiced hinges crucially on the willingness of scholars and practitioners to embrace a plurality of epistemological and normative perspectives on sustainability the multiple interpretations and practices associated with the evolving concept of development and efforts to open up a continuum of local to global public spaces to debate and enact a politics of sustainability embracing pluralism provides a way out of the ideological and epistemological straightjackets that deter more cohesive and politically effective interpretations of sd using pluralism as a starting point for the analysis and normative construction of sustainable development we pay particular attention to how an amalgam of ideas from recent work in ecological economics political ecology and the development as freedom literature might advance the sd debate beyond its post brundtland quagmire enhanced levels of ecological degradation vast inequalities in economic opportunities both within and across societies and a fractured set of institutional arrangements for global environmental governance all represent seemingly insurmountable obstacles to a move towards sustainability while these obstacles are significant we suggest how they might be overcome through a reinvigorated set of notions and practices associated with sustainable development one that explicitly examines the linkages between sustainability policies and sustainability politics

long term substitutability between environmental and man made goods abstract substitutability between environmental and man made goods plays a major role in the sustainability debate the notion of substitutability covers a continuous spectrum with perfect substitutability at one end and poor substitutability at the other in this paper it is shown that if economic growth sustains a sharp distinction emerges between perfect and poor substitutability without any intermediate interpretation of substitutability if poor substitutability prevails environmental resources will eventually constitute the major part of total consumption value we relate our results to baumol s disease and assess the implications of this phenomenon for the compensation of environmental losses

sustainability constraints versus optimality versus intertemporal concern and axioms versus data sustainable sustained or survivable development are defined here as distinct sustainability constraints on intertemporal distribution in a context which ignores uncertainty environmental and intratemporal concerns such constraints are neither self contradictory nor redundant for they can conflict with maximizing the present value of utility optimality nor inferior since the axioms underlying optimality are ethically arbitrary and refuted by empirical psychological data axiomatic arguments may clarify but cannot resolve debates about intertemporal concerns data suggest that sustainability constraints are not respected and that intertemporal welfare functions containing a preference for sustained improvement may better reflect what bodies politic mean by sustainability

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

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

a characterization of sustainability with indicators abstract economists favor the use of criteria to characterize sustainability in practice policy makers use indicators i e measurements based on the current economic state and decisions representing given sustainability issues in this paper i introduce a criterion characterizing sustainability with indicators and thresholds acting as constraints i interpret the thresholds as minimal rights to be guaranteed to all generations and define sustainable trajectories as those satisfying all the constraints at all times the new criterion is a generalized maximin criterion the approach is applied to a simple production consumption economy with non renewable resources to derive some policy recommendations on the use of indicators to deal with sustainability i discuss the implications of such a criterion in terms of trade off between sustainability thresholds efficiency and time consistency in particular the resulting problem is time inconsistent and sustainability thresholds may be revised over time following the time inconsistent policy based on indicators with dynamic revision of the thresholds may however result in a sustained utility path and even in utility growth