recursive equilibria in dynamic economies with stochastic production in this paper we prove the existence of recursive equilibria in stochastic production economies with infinitely lived agents and incomplete financial markets we consider a general dynamic model with several commodities which encompasses heterogeneous agent versions of both the lucas asset pricing model and the stochastic neo classical growth model as special cases our main assumption is that there are atomless shocks to fundamentals that have a purely transitory component and a component that does not depend on last period s shocks directly

welfare dominance an application to commodity taxation in this paper the authors propose a method to identify commodity tax changes that will be favored by all individuals who can agree on certain weak assumptions with regard to the social welfare function the method is based on an extension of the criterion of second degree stochastic dominance and is illustrated using data from israel copyright 1991 by american economic association

lorenz domination and global tax progressivity a reply the concept of tax progressivity at a point local progressivity is well defined and accepted but the concept of overall progressivity of a tax schedule global progressivity is not as precise and clearly defined even though it is an important concept and is widely used in evaluating the redistributive impact of tax policies public finance economists have been comparing tax schedules and making statements on one as more progressive than another without being very precise about the basis of comparison in my earlier paper in the may 1985 issue of this journal liu 1985 i attempted to unify the two concepts of local and global progressivity two requirements are imposed when a tax schedule is characterized as globally progressive one of which is structural and the other redistributive and hence normative in nature drawing on the earlier work of jakobsson 1976 musgrave thin s measure was shown to satisfy both requirements two recently proposed measures by suits 1977 and kakwani 1976 were shown to be unappealing from both a positive and a normative viewpoint in their comment on my paper formby smith and sykes pointed out an error in a proposition by jakobsson thereby showing that the link between the pointwise concept of residual progression and the global concept of lorenz domination is weaker than indicated by jakobsson and me this reduces the appeal of musgrave thin s global measure as structurally consistent with pointwise progressivity everywhere in the tax schedule the implication is that if we insist on this structural consistency the basis for comparison of tax schedules will be too restrictive since comparison will require one post tax income distribution to lorenz dominate another for all instead of for any pre tax income distributions hence despite my earlier effort the device of a global measure of tax progressivity that is consistent with pointwise

progressive taxation and income inequality in dynamic competitive equilibrium abstract this paper establishes the existence of a non degenerate distribution of income in a simple dynamic economy when agents who are heterogeneous in their rates of impatience face a progressive tax system in this dynamic setting income inequality can vary positively with the degree of tax progressivity moreover the inherent heterogeneity in agents behavior can explain why measures of inequality such as the standard deviation of income or atkinson s gini tend to be dynamically much more sluggish than aggregate measures such as total income finally the adjustment in the degree of inequality resulting from an exogenous change in tax policy may take some time before becoming effective this result also arises from agents asymmetric responses to policy changes

global warming economics in the long run a conceptual framework economic models of climate change typically analyze its short run effects for example up to the year 2100 or for a doubling of atmospheric co2 this is a potentially serious shortcoming since under a business as usual scenario atmospheric co2 concentrations could more than quadruple we introduce a framework that endogenously accounts for long run climate change and examine the implications of alternative mitigation strategies one in which the rates of annual emissions are reduced and one that places absolute limits on the total amount of carbon released we discuss alternative valuation frameworks drawing on the debate surrounding the stern review

approximate versus exact equilibria in dynamic economies this paper develops theoretical foundations for an error analysis of approximate equilibria in dynamic stochastic general equilibrium models with heterogeneous agents and incomplete financial markets while there are several algorithms that compute prices and allocations for which agents first order conditions are approximately satisfied approximate equilibria there are few results on h interpret the errors in these candidate solutions and how to relate the computed allocations and prices to exact equilibrium allocations and prices we give a simple example to illustrate that approximate equilibria might be very far from exact equilibria we then interpret approximate equilibria as equilibria for close by economies that is for economies with close by individual endowments and preferences

cyclical dynamics in idiosyncratic labor market risk is individual labor income more risky in recessions this is a difficult question to answer because existing panel data sets are so short to address this problem we develop a generalized method of moments estimator that conditions on the macroeconomic history that each member of the panel has experienced variation in the cross sectional variance between households with differing macroeconomic histories allows us to incorporate business cycle information dating back to 1930 even though our data do not begin until 1968 we implement this estimator using household level labor earnings data from the panel study of income dynamics we estimate that idiosyncratic risk is i highly persistent with an annual autocorrelation coefficient of 0 95 and ii strongly countercyclical with a conditional standard deviation that increases by 75 percent from 0 12 to 0 21 as the macroeconomy moves from peak to trough

verifying competitive equilibria in dynamic economies in this paper i examine e equilibria of stationary dynamic economies with heterogeneous agents and possibly incomplete financial markets i give a simple example to show that even for arbitrarily small e 0 allocation and prices can be far away from exact equilibrium allocations and prices that is errors in market clearing or individuals optimality conditions do not provide enough information to assess the quality of an approximation i derive a sufficient condition for an e equilibrium to be close to an exact equilibrium if the economic fundamentals are semi algebraic one can verify computationally whether this condition holds the condition can be interpreted economically as a robustness requirement on the set of e equilibria which form a neighbourhood of the computed approximation i illustrate the main result and the computational method using an infinite horizon economy with overlapping generations and incomplete financial markets copyright 2011 oxford university press

constant consumption as interest on capital we consider the concepts of aggregate capital value arising in solow s constant consumption model for a traditional concept we establish consumption as interest on wealth in the sense of the interest flow being the vector product of weighted current values of capital stocks and own interest rates consumption can be viewed as maximum sustainable net product i introduction there is a presumption that net investment zero a generalization of investing exhaustible resource rents as in hartwick 1977 must be associated with preserving capital intact see dixit hammond hoel 1980 in fact solow 1986 set this argument out in some detail maintaining capital intact seems like a reasonable prescription for sutainable development elsewhere sustainable development has been tied to non declining consumption following solow s 1974 constant consumption model 2 there are at least two candidates for capital in maintaining capital intact that can be associated with solow s 1974 constant consumption model the two were present in solow 1986 i mention them below and analyze a new approach to linking constant consumption to capital value as in consumption is interest on capital our approach is to make all inputs in current production flows from explicit stocks in this extended solow 1974 model we observe a aggregate consumption constant under zeronet investment and b constant consumption is interest on capital in the sense n

equity in the finance of health care some international comparisons this paper presents the results of a ten country comparative study of health care financing systems and their progressivity characteristics it distinguishes between the tax financed systems of denmark portugal and the u k the social insurance systems of france the netherlands and spain and the predominantly private systems of switzerland and the u s it concludes that tax financed systems tend to be proportional or mildly progressive that social insurance systems are regressive and that private systems are even more regressive out of pocket payments are in most countries an especially regressive means of raising health care revenues

measuring sustainable welfare a new approach to the isew abstract sustainability and welfare assessment is a contemporary theme of major scientific and policy relevance requiring the consideration of multiple dimensions and diverse perspectives the economic approach to sustainability and welfare assessment has frequently relied on alternatives or adjustments to gdp widely used as an indicator of macroeconomic performance several authors have proposed alternative indicators such as the isew which intend to measure sustainability and economic welfare in a way that avoids the limitations of gdp namely accounting for the value of externalities the distribution of income and natural resources depletion since daly and cobb 1989 there have been proposed improvements to the isew however its aptitude to represent a sound alternative to gdp is still the subject of scientific debate this paper presents a new approach to the isew named modified isew including new components and methodological changes for the estimation of the index these have the purpose of avoiding some of the index shortcomings and allow for a direct comparison with the gdp which are advantages over previous studies an application is developed for the us case taking advantage of wide data availability and the possibility of comparing the results with previous works the results obtained provide a clearer picture of the success or failure of environmental and social policies namely by avoiding the tampering effect resulting from the cumulative accounting of environmental externalities this work also emphasizes the inadequacy of gdp as a welfare indicator as well as the need to develop and adopt alternative indicators

stationary equilibria with incomplete markets and overlapping generations recent work on general equilibrium models with incomplete financial markets has demonstrated that when assets pay off in units of account equilibrium prices and allocations are indeterminate the equilibria in such models are also generically constrained suboptimal a central planner can typically reallocate assets in such a way as to pareto dominate the competitive equilibrium in this paper the authors consider an overlapping generations model with incomplete markets in which one asset is fiat money they show that when outside money has value in equilibrium the stationary equilibrium prices and allocations are both locally isolated and constrained optimal copyright 1992 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

interpreting sustainability in economic terms dynamic efficiency plus intergenerational equity abstract economists have confined the concept of sustainability to intertemporal distributional equity we propose a broader definition combining dynamic efficiency and intergenerational equity and relate it to two concepts from neoclassical economics potential pareto improvements and inter personal compensation

single crossing conditions in comparisons of tax progressivity statements to the effect that one tax is more progressive than another are frequently made but seldom explained starting from a criterion of lorenz domination this paper shows how an intuitively appealing single crossing condition on appropriately normalized tax schedules may be used in progressivity comparisons this condition is closely related to and illuminates the necessary and sufficient condition derived by jakobsson 1976 for the distributional implications of alternative taxes to be inferred from their schedules alone

net national product as a welfare indicator the question of whether changes in net national product nnp will measure changes in welfare is investigated in this paper m weitzman 1976 demonstrated that under specific conditions nnp is proportional to discounted consumption the result requires nnp to be measured in current prices in utility units changes in real nnp measured using given prices from a base year will not represent a complete account of welfare changes copyright 1994 by the editors of the scandinavian journal of economics

a matter of opinion how ecological and neoclassical environmental economists and think about sustainability and economics abstract the differing paradigms of ecological and neoclassical environmental economics have been described in various articles and books and are also embedded in different professional associations however we cannot take for granted that the paradigm debates described in the literature are actually mirrored in exactly the same way in the perceptions and opinions of researchers looking at sustainability from an economic perspective this paper presents empirical results from a german case study on how economists and others involved in sustainability research from different schools of thought think about the issues of sustainability and economics how they group around these issues how they feel about the current scientific divide and what they expect to be future topics of sustainability research we analyze the data using cluster analysis based on a literature survey we generated forty sustainability economics related statements and asked 196 sustainability researchers about their degree of agreement or disagreement with these statements in evaluating our survey results we discuss to what extent the clusters that we identified do or do not represent the two schools of thought of ecological and neoclassical environmental economics we also propose some fields of research that can help to bridge the gaps amongst sustainability economics researchers while clearly marking others that are more suitable for a scientific competition of ideas key results of the study are we identify two primary scientific clusters one clearly confirming the existence of the ecological economics school of thought and the other largely capturing the neoclassical environmental view yet there are some surprising exceptions both schools of thought share a conceptual definition of sustainability that is integrative in considering ecological societal and economic dimensions three pillar concept and is geared at preserving the development potentials of society we also find a shared critique of pure economic growth strategies in our sample these shared opinions may provide bridging concepts between the schools of thought also both clusters agree with respect to a wide range of future fields of sustainability economics research yet the research agenda of the ecological economics cluster contains a large number of additional topics primarily related to social distributional and evolutionary aspects of sustainable development strong divides between the clusters that seem to be more suitable for a scientific competition of ideas are primarily related to the question of how to achieve sustainability including appropriate environmental policies

income redistribution and local tax progressivity a reconsideration this paper investigates and clarifies the relation between global tax progressivity as measured by musgrave and thin s effective progression and pointwise local progression as measured by the elasticity of after tax income with respect to pre tax income residual progression liu s 1985 vigorous defence of the global measure of effective progression is shown to rest upon an erroneous proposition of jakobsson 1976 a counter example is presented demonstrating that the link between residual progression and lorenz domination is much weaker than the work of liu and jakobsson suggests redistribution des revenus et mesure ponctuelle de la progressivite de l imp6t un re examen ce memoire examine et clarifie les rapports entre la progressivite globale de l impot telle que mesuree par l indice de progression effective de musgrave et thin et la progressivite ponctuelle de l imp6t telle que mesuree par l elasticite du revenu apres impot par rapport au revenu avant impot la progression residuelle on montre que la vigoureuse defense de liu 1985 de la mesure globale de progression effective est batie sur une proposition erronnee de jakobsson 1976 un exemple montre bien que le lien entre la progression residuelle et la domination au sens de lorenz est bien plus faible que ne le suggerent les travaux de liu et jakobsson

a comparison of two new measures of tax progressivity recently n c kakwani i977 and daniel suits i977 independently and simultaneously developed new measures of the degree of tax progression both measures are related to the gini ratio of income inequality and are distinct from conventional elasticity measures of progressivity in that each yields a summary statistic while standard elasticity measures of progressivity vary as the tax base changes in this paper we briefly describe the measures identify their important characteristics and establish the analytical relation between them empirical calculations of the progressivity of the u s income tax system for the period i 962 76 reveal that the two measures display different magnitudes of change in progressivity more importantly in three out of fourteen years the measures moved in opposite directions

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

endogenous market incompleteness without market frictions dynamic suboptimality of competitive equilibrium in multiperiod overlapping generations economies abstract in this paper we show that within the set of stochastic three period lived olg economies with productive assets such as land markets are necessarily sequentially incomplete and agents in the model do not share risk optimally we start by characterizing perfect risk sharing and find that it requires state dependent consumption claims which depend only on the exogenous shock realizations we show then that the recursive competitive equilibrium of any overlapping generations economy with weakly more than three generations is not strongly stationary this then allows us to show directly that there are short run pareto improvements possible in terms of risk sharing and hence that the recursive competitive equilibrium is not pareto optimal we then show that a financial reform which eliminates the equity asset and replaces it with zero net supply insurance contracts arrow securities will implement to pareto optimal stochastic steady state known to exist in the model finally we also show via numerical simulations that a system of government taxes and transfers can lead to a pareto improvement over the competitive equilibrium in the model

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

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

paretian welfare judgements and bergsonian social choice two distinct approaches can be identified in the new welfare economics the school of thought based on the compensation principles attempted to see what can be said about social welfare without making interpersonal comparisons of well being by extending the applicability of the pareto principle through hypothetical compensatory payments between gainers and losers the bergson samuelson school of thought introduced the social welfare function as a formal method of introducing a pareto inclusive ethical belief on social welfare whose policy implications we should theoretically explore synthesising these two approaches this paper identifies a condition under which the new welfare economics is logically impeccable

sustainability and wellbeing a scientometric and bibliometric review of the literature interdisciplinary research on measuring the progress towards sustainability and well being saw from different perspectives and in various contexts has developed dramatically over recent decades this growth in the literature has not only added an enormous number of dimensions to the saw debate but the sheer scale of the expansion has challenged researchers to be able to conduct a comprehensive analysis of the available saw indicators in this work we have proposed a hybrid method comprised of sophisticated scientometric analysis to summarise scientific developments in the massive text corpus of the saw literature in conjunction with a more traditional literature review to categorise the fuzzy details that remain scientometric analysis highlights that the developed oecd countries play a vital role in the development and applications of saw indicators and we describe key developments in this regard via a range of graphical approaches using an extensive collection of existing saw indicators the analysis is then summarised in a matrix of ranked indicators which serve as a powerful tool to compare contrast filter and select indicators for saw assessment with minimum redundancies between indicators the approach undertaken in this study is intended to be flexible and can be extended and applied to other fields of research

capital theory and the measurement of sustainable development an indicator of weak sustainability the measurement of sustainable development is not without considerable difficulties yet this should not detract from the positive advances that can be made in this direction in this paper we present one form that a weak sustainability indicator can take derived from a simple but intuitive savings rule it incorporates the idea that the level of overall capital stock should be non decreasing although subject to qualification at this stage some interesting results emerge from the application of the rule to 18 countries

the value of biodiversity markets society and ecosystems the value of biodiversity is discussed at different levels including market value non market values to humans and the value of biodi versity to ecosystems the main conclusion is that although market exchange values of environmental services may be used to justify biodiversity protec tion measures it must be stressed that exchange value constitutes a small portion of total biodiver sity value the total value of existing biodiversity is largely unknown but indications are that it is essen tial to human existence the various levels of biodi versity value point to the need for a hierarchical and pluralistic methodology to determine appropri ate policies for its preservation jel q21 i introduction among ecologists there is a general con sensus that biodiversity1 is of critical impor tance to the health of ecosystems and even for the long term survival of the human species there is also a consensus that bio diversity is being lost at a rate which is a cause for concern 2 economists on the other hand generally view biodiversity as just an other good which is to be placed in the basket of market choices just as any other the discussion of the specifics of biodiver sity policy has been unsatisfactory partly because of the different meanings of the word value used by economists and ecolo gists many ecologists fail to understand the logic of market allocation and why biologi cal resources are used in seemingly irra tional ways many economists fail to ap preciate the narrowness of the concept of economic value as indicated by relative prices determined by market exchange fol lowing anderson 1966 and brown 1984 the discussion below considers economic measures of value to be species of the genus assigned value which belongs to the family value many biologists and paleontologists be lieve that we are at a critical point in the history of the human species and perhaps even in the 600 million year history of com plex multicelled life on earth if the paleon tologists and biologists who study the phe nomenon of mass extinction are correct the current human induced mass extinction may be of the same order of magnitude as the five other major extinction episodes which destroyed between 20 and 96 percent of existing species on the planet ehrlich and ehrlich 1992 ward 1994 wilson 1992 we are living in a truly remarkable period in earth s 41 billion year history the valua tion decisions our species has made in the recent past and will make during the next few decades will determine the fate of life on earth for the next tens of millions of years it is critical to clarify the language and concepts we use to estimate the value of biodiversity and thus policies leading to its destruction or preservation the importance attached to the issue of biodiversity preservation necessarily in volves ethical judgments about duty to fu ture generations and responsibility toward the nonhuman natural world although in dividuals hold a variety of conflicting beliefs about human responsibility to the natural world this does not mean that policy choices

comprehensive versus inclusive wealth accounting and the assessment of sustainable development an empirical comparison abstract this paper compares alternative wealth estimates reported by the world bank and in the inclusive wealth reports although theoretical limitations and shortcomings are widely acknowledged in the literature the extent to which the alternative approaches to wealth accounting matter empirically is not well known comparing the alternative data in levels shares growth rates and monetary sustainability indices derived from them major differences emerge between oecd and non oecd countries for the former the alternative wealth estimates seem complementary but only if a key assumption made in the derivation of inclusive wealth is violated for the latter the data seem much less useful for example depending on which data source is used for the group of low income countries the share of natural capital in total wealth is either 36 8 or 60 4 suggesting that extreme care must be taken if the composition of wealth were to be used to inform policy making neither wealth data set provides a definite guide to economic sustainability but a combination of indices derived from both might be useful in a holistic assessment of sustainability

a review article the case against the use of the sum of compensating variations in cost benefit analysis this paper presents a case against the use of the sum of compensating varia tions as a cost benefit test we argue that 1 the ethical judginents implied by the test are not defensible 2 positive sums of compensating variations occur without potential pareto improvements resulting in social preference reversals without simultaneous scitovsky re versals 3 when lump sum transfers are feasible a positive sum of compensating variations is necessary but not sufficient for a potential pareto improvement 4 in order to eliminate preference reversals and intransitivities all households must have almost identical quasi homothetic preferences a condition that is not satisfied in real economies

new evolutionary foundations theoretical requirements for a science of sustainability abstract ecological economics stands in theoretical and ethical opposition to many aspects of neoclassical economic theory despite their sound critiques of that theory ecological economists have not settled on an alternative theory of human behavior as a potential alternative norgaard s socioecological coevolutionary framework remains underspecified in terms of variation heredity and selection i review concepts and insights on human behavior from evolutionary biology and evolutionary social science in order to supply new theoretical tools for ecological economic problems and help refine the coevolutionary framework i argue that a synthetic evolutionary theory of human behavior provides a sufficient alternative to the neoclassical perspective and that cultural evolutionary theory is a necessary prerequisite of a mature economic science ecological coevolutionary or otherwise finally i suggest some potential topics that such a mature theory might begin to tackle

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

measuring future grandparents preferences for equality and relative standing individuals aversion to risk and inequality and their concern for relative standing are measured through experimental choices between hypothetical societies it is found that on average individuals are both fairly inequality averse and have a strong concern for relative income the results are used to illustrate welfare consequences based on a utilitarian swf and a modified crra utility function it is shown that the social marginal utility of income may then become negative even at income levels that are far from extreme

evaluating effective income tax progression abstract an algorithm to compute effective income tax progression is devised for use when taxes are a function of both money income and other socioeconomic attributes and the data is in grouped summary form suppressing non income information effective progression can be evaluated at percentiles in the distribution of either money or equivalent income the normative significance of the new measures is explained in both cases the methodology is illustrated by application to u s individual income tax annual data for 1950 1987 yielding contour plots which show how effective progression has varied across the income distribution and with the passage of time

the possibility of social choice the subject of social choice includes within its capacious frame various problems with the common feature of relating social judgments and group decisions to the views and interests of the individuals who make up the society or the group some challenges and foundational problems faced by social choice theory as a discipline are discussed social choice theory is a subject in which formal and mathematical techniques have been very extensively used voting based procedures are entirely natural for some kinds of social choice problems such as elections referendums or committee decisions they are however altogether unsuitable for many other problems of social choice impossibility results in social choice theory led by the pioneering work of arrow 1951 have often been interpreted as being thoroughly destructive of the possibility of reasoned and democratic social choice including welfare economics that view is argued against

uniform progressivity residual progression and single crossing abstract the relationship between lower residual progression and single crossing conditions as necessary and sufficient conditions for one tax system to be conditionally more progressive or uniformly more progressive than another are clarified

personal income tax progressivity and output volatility evidence from oecd countries this paper investigates empirically the effect of personal income tax progressivity on output volatility using macro data from a sample of oecd countries over the period 1982 2009 our measure of progressivity is based on the difference between the marginal and the average personal income tax rate for the average production worker we find supportive empirical evidence for the hypothesis that higher personal income tax progressivity leads to lower output volatility this effect comes in addition to the stabilizing impact of government size and it is equally important in economic terms all other factors constant countries with more progressive personal income tax systems seem to benefit from stronger automatic stabilizers

forward and backward intergenerational goods why is social security good for the environment this paper studies the ability of nonmarket institutions to invest optimally in forward intergenerational goods figs such as education and the environment when agents are selfish or exhibit paternalistic altruism we show that backward intergenerational goods bigs such as social security play a crucial role in sustaining investment in figs without them investment is inefficiently low but with them optimal investment is possible we also show that making the provision of bigs mandatory crowds out the voluntary provision of figs and that population aging can increase investment in figs

lorenz domination and global tax progressivity the paper clarifies the concept of global progressivity as opposed to pointwise progressivity and proposes a summary measure for global progressivity on the basis of lorenz domination as a ranking criterion for income distributions by extending the work of musgrave and thin 1948 and jakobsson 1976 other ad hoc summary measures for global progressivity are evaluated from both a positive and a normative viewpoint domination selon le critere de lorenz et progressivite globale de la fiscalite ce memoire clarifie le concept de progressivite globale par opposition au concept de progressivite ponctuelle et propose une mesure sommaire de progressivite globale fondee sur la domination selon le critere de lorenz ce critere pour la comparaison de distributions de revenus est developpe en prolongeant certains travaux de musgrave et thin 1948 et de jakobsson 1976 l auteur examine aussi de fa on critique d autres mesures sommaires de progressivite globale dans une optique normative et positive

recursive equilibrium in stochastic overlapping generations economies we prove the generic existence of a recursive equilibrium for overlapping generations economies with uncertainty generic here means in a residual set of utilities and endowments the result holds provided there is a sufficient number of potentially different individuals within each cohort

life cycle economies and aggregate fluctuations do the implications for business cycle issues change when we switch from studying infinitely lived representative agent models to more sophisticated demographic structures with finitely lived agents this article addresses that question by using a large overlapping generations model that is calibrated to u s demographic properties microeconomic evidence and national income and product accounts the finding is that the answers obtained are basically the same for the two kinds of models the article also explores the relative volatility of hours across age groups an issue that cannot be addressed by using the infinitely lived representative agent abstraction

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

some calculations of lifetime tax incidence this paper reports a set of lifetime tax incidence calculations using a life cycle simulation model for canada due to davies 1979a 1982 a repeatedly stated qualification to annual calculations in the empirical tax incidence literature is that it would be more satisfactory to make calculations on a lifetime basis even though it is acknowledged that lifetime tax incidence could well differ from annual it is widely believed that data and other difficulties make such calculations next to impossible indeed the widespread acceptance of the data problems of lifetime calculations seems also to have inhibited speculation about how lifetime tax incidence might differ from annual as a result redistributive tax policy judgments continue to be based on annual incidence calculations in spite of the reservations many have about their usefulness our paper is intended to reorient discussion towards lifetime tax incidence by providing some initial null hypotheses about the shape of lifetime tax profiles our main finding is that under the standard competitive assumptions common in the incidence literature lifetime and annual incidence calculations both produce mild progression in tax rates across household deciles ignoring the bottom decile in the annual calculation while the income tax is less progressive in lifetime than in annual calculations other taxes are for the most part less regressive also lifetime incidence calculations are much more robust to alternative shifting assumptions than annual calculations in the lifetime context key distributions such as earnings transfer payments and consumption are less heavily concentrated in particular percentiles of the population than is true in annual data as a result changing the allocative series for any particular tax does not have the large effect on incidence results found in annual calculations each component of the tax system is allocated to households grouped by lifetime income using particular distributive series following a procedure similar to that employed in annual incidence calculations for example richard musgrave et al 1974 joseph pechman and benjamin okner 1974 edgar browning and william johnson 1979 w irwin gillespie 1980 in the process we are able to compare lifetime and annual incidence calculations using the same data set in both lifetime and annual calculations we allocate five groups of taxes among households using distributive series which come partly from the 1971 statistics canada survey of consumer finances scf and partly from our life cycle simulation model the scf data are used to construct synthetic longitudinal lifetime profiles of earnings and transfer payments for a sample of 500 households the latter are assigned inheritances by simulating patterns of mortality and bequest these data are then used in the life cycle model to generate lifetime consumption profiles and bequests the earnings transfer and inheritance data plus the model output provide the distributive series on which alternative incidence calculations are based while the incidence calculations presented in this paper use canadian data results would likely be similar for the united states

national wealth and net national product solow 1986 established that corresponding to constant consumption programs with essential exhaustible resource stocks there was a capital value that was remaining constant he thus obtained a hick s type of result namely that current consumption left capital intact solow was using weitzman 1976 as a point of departure it turns out that there is a quite general solow type of result namely that nnp t is interest on the value of accumulated capital v t where v t can include diminutions in natural resource stocks and the interest rate is the social discount rate a weitzman 1976 result is that nnp t is interest on capital where capital is discounted future optimal consumption the interest rate being the discount rate there is then an attractive duality here forward views of capital discounted future optimal consumption programs at date t coincide with backward views of capital current value of accumulated stocks at date t first we observe the weitzman result as the solved bellman equation in dynamic programming this leads directly to the result that nnp t is interest on the value of accumulated capital next we re work the derivations with an essential exhaustible resource and then with endogenously produced knowledge

rational expectations in the overlapping generations model abstract this paper reports results on the character of the rational expectations equilibria of a stochastic overlapping generations model with heterogenous markets the model considered is a stationary overlapping generations model in which the endowments of young agents are subject to i i d random shocks the main result shown is that if there are l 1 commodities traded in every period then for most preferences the rational expectations equilibrium stochastic process of prices and allocations necessarily exhibits serial correlation this is in marked contrast to the one commodity model in which there always exists an equilibrium which is measure isomorphic to the endowment process

hicksian income from resource extraction in an open economy we derive a measure of national income defined in terms of maximum sustainable per capita consumption if population and interest rates are constant the income generated by natural resource extraction is the return on resource wealth defined as the present value of future resource rents with a growing population or declining interest rate sustainability requires net increases in wealth over time the income from extraction of nonrenewable resources can exceed resource rents contrary to the conclusions of el serafy 1989 and repetto et al 1989 finally we present an example illustrating the hazard of consuming the full increment of hicksian income

the crowding out of complex social goods the valuation of ecosystem services to inform natural resource management and development has gained acceptance in many arenas yet contemporary economic valuation is constrained to the appraisal of simple goods that generate benefits that accrue to individuals neglecting complex goods that generate benefits that accrue to society more broadly methodological barriers to the valuation of complex social goods have led to their frequent omission from natural resource management deliberations the prevailing valuation paradigm that focuses on simple individual goods may erode conservation efforts by crowding out the institutions and behaviours that support socially constructed ecosystem service values erosion of these values ultimately harms the environment and society as a whole the institutionalisation of appropriate methods for estimating the value of complex social goods alongside existing methods for valuing simple individual goods within international conservation development and policy making discourses is therefore an important evolution for sustainable natural resource management

the importance of ethics in environmental economics with a focus on existence values the importance of ethics and fundamental value judgments in environmental economics is high lighted by discussing the controversial concept of existence values the social value depends crucially on the social objective which is not necessarily self evident e g since some individuals tend to value nature intrinsically it is shown that the motives behind willingness to pay figures matter for the social value and the conventional view that people respond to cv questions solely in order to maximize their own utility or well being is questioned the importance of being explicit about value judgments is emphasized and it is argued that environmental economics should consider non conventional assumptions which take the social context into account to a larger degree

teaching un sustainability university sustainability commitments and student experiences of introductory economics the three largest public universities in british columbia canada have signed the talloires declaration committing themselves to promoting sustainability and creating expectations that they will integrate sustainability across the curriculum in order to improve students environmental literacy and stewardship about 40 of north american university students take a mainstream introductory economics course few of these students take economics at more advanced levels as such introductory economics courses are an important vehicle for students to learn economic theory they have the potential to contribute to the knowledge that students can mobilize to foster sustainability interviews were held with 54 students who had recently completed an introductory level mainstream economics course at one of the three universities students reported that introductory economics courses place little emphasis on the environment and sustainability they recalled course content with normative connotations that are problematic from a sustainability perspective and they described how discussion of the limitations of mainstream theory was set aside student reports of the insights introductory economics offers into environmental problems imply that these courses are failing to substantively increase students understanding of sustainability and linkages between the environment and the economy findings suggest that current introductory economics curriculum undermines the universities sustainability commitments

progressive taxation redistribution and labor supply the analysis of the effect of progression on labor supply is extended to a model with many consumers the condition for progression to increase labor supply given constant aggregate tax revenue is derived and shown to depend on the income effects resulting from redistribution it is then shown that the optimal linear income tax schedule involves a degree of progression which on the margin does reduce labor supply