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

explaining us immigration 1971 1998 abstract in this paper we develop and estimate a model to explain variations in immigration to the united states by source country since the early 1970s the explanatory variables include ratios to the united states of source country income and education as well as relative inequality in addition we incorporate the stock of previous immigrants and a variety of variables representing different dimensions of the immigration quotas set by policy we use the results to shed light on the impact of policy by simulating the effects of the key changes in immigration policy since the late 1970s we also examine the factors that influenced the composition of u s immigration by source region over the entire period

one market one number a composite indicator assessment of eu internal market dynamics we consider the lack of consensus about an appropriate theoretical framework linking sub indicators as a defining characteristic of composite indicators this intrinsic feature implies uncertainties about the appropriate normalization and aggregation of the raw data the two are related index theory offers some valuable guidelines about their connection yet these do not fully solve the basic problem of expert disagreement we embed such residual disagreement in the aggregation method itself specifically we apply an impartial benefit of the doubt weighting procedure where weight restrictions incorporate the available information on experts opinions we apply this procedure to the dynamic performance assessment of eu internal market effects thereby highlighting its capacity to disaggregate member states observed performance shifts into changes relative to benchmarks and performance changes of the benchmarks i e catching up versus genuine progress our results indicate that the latter factor is more important in explaining the observed progress

unemployment growth and taxation in industrial countries unemployeement and taxes do taxes affect the rate of umemployeement to the layman the upward trend in european unemployment is related to the slowdown of economic growth we argue that the layman s view is correct the increase in european unemployment and the slowdown in economic growth are related because they stem from a common cause an excessively rapid growth in the cost of labour in europe labour costs have gone up for many reasons but one is particularly easy to identify higher taxes on labour if wages are set by strong and decentralized trade unions an increase in labour taxes is shifted onto higher real wages this has two effects first it reduces labour demand and thus creates unemployment secondly as firms substitute capital for labour the marginal product of capital falls over long periods of time this in turn diminishes the incentive to invest and to grow the data strongly support this view according to our estimates the observed rise of 14 percentage points in labour tax rates between 1965 and 1995 in the eu could account for a rise in eu unemployment of roughly 4 percentage points a reduction of the investment share of output of about 3 percentage points and a growth slowdown of about 0 4 percentage points a year francesco daveri and guido tabellini

climate change uncertainty irreversibility and the precautionary principle this paper begins with a critique of the option value argument used by economists to explain and justify the precautionary principle the argument is shown to misrepresent both uncertainty and irreversibility an alternative justification of the precautionary principle is discussed under conditions of keynesian uncertainty and irreversibility interpreted in terms of incommensurability recent formal decision theories under keynesian uncertainty are reviewed and their limitations explored with particular reference to the insights that decision theory can bring to understanding the precautionary principle throughout the decision problems under consideration are those faced by climate change policy makers copyright oxford university press

lobbying by ethnic groups and aid allocation we develop a political economic model of foreign aid allocation each ethnic group in the donor country lobbies the government to allocate more aid to its country of origin and the government accepts political contributions from lobby groups initial per capita income of the recipients and those of the ethnic groups are shown to be important determinants of the solution of the political equilibrium we also examine the effects of changes in the degree of corruption aid fatigue and ethnic composition in the donor country on the allocation of aid

evidence on changes in aid allocation criteria have donors changed their aid allocation criteria over the past three decades toward greater selectivity a frequently stated goal of the international development community using data on how 22 donors allocated their bilateral aid among 147 countries over 1970 2004 the article finds that after the fall of the berlin wall in 1989 and especially in the late 1990s bilateral aid responded more to poverty and the quality of the policy and institutional environment in the recipient countries furthermore the sensitivity of aid allocation to the country s size and its debt burden has declined over time these results are robust to different samples and model specifications various econometric techniques and alternative measures of institutional quality while the specific factors causing these changes cannot be identified these presumably include geopolitical and economic concerns and the many changes in the international aid architecture donors still differ greatly in their selectivity this suggests that further multifaceted reforms are needed to ensure even greater selectivity of aid

getting the safe minimum standard to work in the real world a case study in moral pragmatism abstract there is growing endorsement of local stake holder conventions to resolve unusual environmental disputes the conventions are separate decision making bodies designed to by pass conventional institutions the hazards of a stake holder convention which is overly detached from conventional decision making leads to a discourse that never successfully confronts the value controversies which the stake holder convention is charged to resolve a case study uncovers obvious and robust strategic manipulations of stake holder conventions that intrude on value dialogue an appeal to the safe minimum standard rules of ciriacy wantrup updated to engage this question successfully corrects some of the more egregious stumbling blocks to good faith dialogue in local discourse the proposed constraints on the stake holder convention can be quite directive authoritative and bureaucratic yet the constraints are necessary to preserve good faith conduct within the dialogue

on welfare frameworks and catastrophic climate risks recent theoretical work in the economics of climate change has suggested that climate policy is highly sensitive to fat tailed risks of catastrophic outcomes weitzman 2009 68 such risks are suggested to be an inevitable consequence of scientific uncertainty about the effects of increased greenhouse gas concentrations on climate criticisms of this controversial result fall into three categories the first suggests that it may be irrelevant to cost benefit analysis of climate policy the second challenges the fat tails assumption and the third questions the behavior of the utility function assumed in the result this paper analyses these critiques and suggests that those in the first two categories have formal validity but that they apply only to the restricted setup of the original result which may be extended to address their concerns they are thus ultimately unconvincing critiques in the third category are shown to be robust however they open up new ethical and empirical challenges for climate economics that have thus far been neglected how should we value catastrophes as a society i demonstrate that applying results from social choice to this problem can lead to counterintuitive results in which society values catastrophes as infinitely bad even though each individual s utility function is bounded finally i suggest that the welfare functions traditionally used in climate economics are ill equipped to deal with climate catastrophes in which population size changes drawing on recent work in population ethics i propose an alternative welfare framework with normatively desirable properties which has the effect of dampening the contribution of catastrophes to welfare

alternative models of individual behaviour and implications for environmental policy abstract most insights of environmental economics are in line with the standard neoclassical economic model of rational behaviour formulated in terms of maximization of utility in general or of profits in particular the standard theory of environmental policy is a case in point however the maximization hypothesis and its methodological foundation have been criticized on many grounds related to a lack of either logical or empirical content moreover over the years a great many alternative models of behaviour have been proposed both criticism and alternatives are surveyed here attention is devoted to relevant insights from the philosophy of science the notion of methodological individualism and other criticism the alternative behavioural models include bounded rationality and satisficing lexicographic preferences habitual behaviour incommensurability and multicriteria evaluation and various models of behaviour under uncertainty major implications of the criticism and alternative models of individual behaviour for environmental policy theory are outlined

revisiting the trade migration nexus evidence from new oecd data international migrants contribute to bilateral trade creation if their presence reduces information costs or entails additional demand for goods from their source countries using new data on stocks of foreign born individuals by skill class we try to separately quantify those two channels we assume that improved information affects host countries imports and exports symmetrically while the preference channel matters for imports only on average for differentiated goods both channels contribute evenly toward the total trade creating effect of migration in line with expectations the relative importance of the trade cost channel is largest for homogeneous goods and for high skilled migrants

the rationality of a safe minimum standard the safe minimum standard sms is a policy shift to safety defaults to forestall irreversible outcomes critics charge an inconsistency what justifies business as usual cannot also justify switching to the sms currently the sms is only a procedural shift where economic optimality procedures are buttressed by extra special focus on uncertainty yet social welfare function may not be complete enough warranting a more fundamental sms shift numerous moral positions support this sms approach this sms also operationalizes the intolerable cost as a trigger point noting societies with lower tolerance for sacrifice must trigger the sms earlier

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

income and employment dynamics in europe cosci s and sabato v 2007 income and employment dynamics in europe regional studies 41 295 309 the study intends to deepen the analysis of the dynamics of income and employment in europe between 1989 and 1996 by considering the complex spatial consequences of the failure of the fordist production model previous studies found evidence of polarization in unemployment rates and persistence in per capita income in european regions when objective 1 regions are excluded from the analysis different results are obtained but a marked difference in the dynamics of income and unemployment rate is still found this difference may have been caused by country effects and the features of two specific kinds of regions old industrialized regions and urban and capital regions the relationship between the dynamics of employment and the dynamics of income is therefore significantly affected by the spatial consequences of production changes and socio economic transformations cosci s et sabato v 2007 les dyn

how to decide when experts disagree uncertainty based choice rules in environmental policy environmental economists have traditionally addressed the issue of choice under uncertainty by applying the expected utility hypothesis when policymakers face a panel of experts with widely divergent beliefs the problem may more accurately be described as a case of choice under pure uncertainty arrow and hurwicz 1972 demonstrate that rational choice criteria under pure uncertainty will focus on the extremes of the state space not the midpoint as is typically assumed using nordhaus s dice model uncertainty based choices about global warming policies are evaluated linkages to the safe minimum standard and the precautionary principle are also discussed

estimating aid allocation criteria with panel data in 1990 the net amount of economic aid or official development assistance to all recipients from all multilateral and bilateral sources was about 62 billion an amount that exceeded the gdps of greece and portugal despite the size of this yearly transfer there has been no rigors modeling and estimation of the criteria by which it occurs as a result there is little agreement about the extent to which oda is allocated according to the needs of the recipient countries the purpose of this paper is to develop a rigorous theoretical model of oda allocation that can be used to provide consistent estimates of the importance of recipient needs copyright 1994 by royal economic society

revisiting the effects of regional trade agreements on trade flows with proper specification of the gravity model this paper uses a gravity model to assess ex post regional trade agreements the model includes 130 countries and is estimated with panel data over the period 1962 1996 the introduction of the correct number of dummy variables allows for identification of vinerian trade creation and trade diversion effects while the estimation method takes into account the unobservable characteristics of each pairs of trade partner countries the endogeneity of some of the explanatory variables as well as a potential selection bias in contrast to previous estimates results show that regional agreements have generated a significant increase in trade between members often at the expense of the rest of the world

global warming discounting is not the issue but substitutability is the cost benefit study of nordhaus 1994 is representative for the neoclassical approach towards global warming nordhaus found that no substantial emission cuts are warranted most of his critics have concentrated on the issue of discounting and demanded that a lower discount rate should be applied these criticisms first miss the point and second lead to ethically dubious inconsistent conclusions and inefficient policy choices they miss the point because the real problem of nordhaus s methodology is his implicit underlying assumption of perfect substitutability between natural and other forms of capital given the validity of this assumption lowering the rate of discount is inconsistent with current savings behaviour is ethically dubious because future generations will be much richer than the current one anyway and is inefficient because scarce financial resources are channelled into emissions abatement that exhibits rates of return far inferior to alternative public investments any call for aggressive emission abatement must therefore directly attack the perfect substitutability assumption of neoclassical economics the real disagreement is about whether consumption growth can compensate for environmental degradation caused by global warming discounting is not the issue but substitutability is

ambiguity and uncertainty in ellsberg and shackle this paper argues that the similarities between ellsberg s and shackle s frameworks for discussing the limits of the probabilistic approach to decision theory are more important than usually admitted the paper discusses the grounds on which the ambiguity surrounding the decision maker in ellsberg s urn experiments can be deemed analogous to the uncertainty faced by shackle s entrepreneur taking crucial decisions the two authors insights are assessed and special attention is paid to the criteria for decision under uncertainty they put forward the paper establishes a link between ellsberg s and shackle s perspectives and the non additive probability approach of gilboa and schmeidler an approach that offers an alternative to standard probability calculus which can be of use to analyse both ambiguity and uncertainty the comparison between ellsberg and shackle draws on an interpretation of keynes s treatise on probability emphasising keynes s rejection of both well defined probability functions and maximisation as a guide to human conduct it is shown that keynes s viewpoint implies a reconsideration of the boundaries of probability theory that is in the same vein of ellsberg s and shackle s concern in the years of the consolidation of savage s new probabilistic mainstream copyright the author 2009 published by oxford university press on behalf of the cambridge political economy society all rights reserved oxford university press

fact free learning aragones acknowledges financial support from the spanish ministry of science and technology grant sec2003 01961 and creabarcelona economics aragones gilboa and schmeidler gratefully acknowledge support from the polarization and conflict project cit 2 ct 2004 506084 funded by the european commission dg research sixth framework programme gilboa and schmeidler gratefully acknowledge support from the israel science foundation grant 790 00 and 975 03 postlewaite gratefully acknowledges support from national science foundation grant sbr 9810693

theories of choice under ignorance and uncertainty abstract in this paper knight s distinction between risk and uncertainty and its significance for economic analysis are examined the paper consists of a survey of some recent developments on the theory of choice under uncertainty and some applications of these theories to problems for which bayesian decision theory has not proved entirely satisfactory two problems are examined in detail the first is that of finance and insurance and the second is that of risktaking behaviour with special emphasis on lotteries

monetary valuation of the social cost of co2 emissions a critical survey an expanding branch of research has estimated the potential costs of climate change which are often expressed as the social cost of carbon scc or the costs of an additional ton of co2 emissions estimates of the scc can be used by policy makers to evaluate climate change policies and greenhouse gas emission reduction projects by means of cost benefit analyses cbas such analyses are complicated by the wide range of scc values that have been reported in the literature and the large uncertainties involved in estimating the potential economic impacts and related costs of climate change this study presents a critical review of the reported scc estimates by examining some neglected consequences of climate change uncertain and extreme scenarios of climate change the discounting of future climate change effects the treatment of individual risk aversion and assumptions about social welfare in view of the many uncertainties and omissions in conventional cost benefit analyses of climate impacts and the scc alternative approaches to decision making should be considered for climate policy

setting environmental policy when experts disagree how can a decision maker assess the potential of environmental policies when a group of experts provides divergent estimates on their effectiveness to address this question we propose and analyze a variant of the well studied alpha maxmin model in decision theory in our framework and consistent to the paper s empirical focus on renewable energy r d investment experts subjective probability distributions are allowed to be action dependent in addition the decision maker constrains the sets of priors to be considered via a parsimonious measure of their distance to a benchmark average distribution that grants equal weight to all experts while our model is formally rooted in the decision theoretic framework of olszewski rev econ stud 74 567 595 2007 it may also be viewed as a structured form of sensitivity analysis we apply our framework to original data from a recent expert elicitation survey on solar energy the analysis suggests that more aggressive investment in solar energy r d is likely to yield significant dividends even or rather especially after taking expert ambiguity into account

choice under partial uncertainty this paper analyzes problems of choice under uncertainty where a decisionmaker does not use subjective probabilities the decisionmaker has a set of beliefs about which states are more likely than others but his beliefs cannot be represented as subjective probabilities three main kinds of decision rules are possible in this framework these are maximin type maximax type and choosing that action that gives the highest payoff in the state which the decisionmaker believes to be most likely the author replaces the commonly used merger of states axiom with a version of the sure thing principle copyright 1993 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

on modeling and interpreting the economics of catastrophic climate change with climate change as prototype example this paper analyzes the implications of structural uncertainty for the economics of low probability high impact catastrophes even when updated by bayesian learning uncertain structural parameters induce a critical tail fattening of posterior predictive distributions such fattened tails have strong im plications for situations like climate change where a catastrophe is theoretically possible because prior knowledge cannot place sufficiently narrow bounds on overall damages this paper shows that the economic consequences of fat tailed structural uncertainty along with unsureness about high temperature damages can readily outweigh the effects of discounting in climate change policy analysis

trade aid and migrations some basic policy issues the link between trade policy and international migration is explored using data from the united states and europe we conclude that restrictive trade policies in industrialised countries have most likely added to migration pressures we then turn to the broader question of the effects of income growth in the sending countries on the propensity to migrate we argue that in relatively poor countries an increase in income will be associated with higher migration flows for middle income countries however income growth will lead to lower migrations in the medium run therefore the relationship between development levels as measured by gdp per capita and the propensity to migrate follows an inverse u pattern econometric analysis of aggregate migration flows from southern europe provides considerable support for such conjecture excerpt

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

incorporating distributional considerations in the safe minimum standard approach endangered species and local impacts abstract explicitly incorporating current distributional concerns into the safe minimum standard sms approach is the objective of this study the sms approach is a collective choice process that prescribes protecting a minimum level of a renewable natural resource unless the social costs of doing so are somehow excessive or intolerably high more complete implementation of an sms approach if it is to be a pragmatic policy tool requires that distributional considerations be included in determining whether the economic consequences of preservation actions are intolerable two case studies involving the us endangered species act are used to illustrate how distributional concerns might be incorporated into the sms approach

evaluating aid for trade a survey of recent studies the demand for accountability in aid for trade is increasing but monitoring has focused on case studies and impressionistic narratives the paper reviews recent evidence from a wide range of studies recognizing that a multiplicity of approaches is needed to learn what works and what does not the review concludes that there is some support for the emphasis on reducing trade costs through investments in hard infrastructure like ports and roads and soft infrastructure like customs but failure to implement complementary reform especially the introduction of competition in transport services may erode the benefits of these investments direct support to exporters does seem to lead to diversification across products and destinations but it is not yet clear that these benefits are durable in general it is difficult to rely on cross country studies to direct aid for trade more rigorous impact evaluation is an underutilized alternative but situations of clinical interventions in trade are rare and adverse incentives because of agency problems and costs because of the small size of project are a hurdle in implementation

inequality and convergence in europe s regions reconsidering european regional policies europe s regions income disparities and regional policies in this paper we take a critical look at current european regional policies first we document the motivation for such policies that is the large income disparities across the regions of the eu15 large disparities are certainly present second we illustrate the various instruments adopted and discuss their underpinnings in established economic theories next we look at available data searching for three kinds of evidence 1 if disparities are either growing or decreasing we conclude they are neither 2 which are the major factors explaining such disparities and in particular if they are the factors predicted by the economic models adopted by the commission to justify current policies we conclude this is most certainly not the case 3 if there are clear signs that eu policies as opposed to other social and economic factors are actually reducing such disparities we cannot find any clear sign of such desired impact our conclusion is that regional and structural policies serve mostly a redistributional purpose motivated by the nature of the political equilibria upon which the european union is built they have little relationship with fostering economic growth this casts a serious doubt on their social value and furthermore strongly questions extending such policies to future members of the european union a successful eu enlargement in our view calls for an immediate and drastic revision of regional economic policies michele boldrin and fabio canova

the geographical concentration of unemployment a male female comparison in spain alonso villar o and del rio c geographical concentration of unemployment a male female comparison in spain regional studies the aim of this paper is to analyse gender differences in the spatial distribution of unemployment specifically it is explored whether agglomeration can influence gender gaps in unemployment rates in doing so tools are used from the literature on economic geography and income distribution and they are adapted to the present case using data from spain it is shown that the advantage of living in large cities does not affect women and men equally agglomeration seems especially to favour the female population the results also suggest that the female employment premium appears only in municipalities of a certain size alonso villar o et del rio c la concentration geographique du chomage une comparaison hommes femmes en espagne regional studies cet article cherche a analyser les differences par sexe de la distribution geographique du chomage plus precisement on etudie s

capturing the complexity of biodiversity a critical review of economic valuation studies of biological diversity biodiversity is a highly complex and abstract ecological concept even though it is not one physical entity it influences human well being in multiple ways mostly indirectly while considerable research effort has been spent on the economic valuation of biodiversity it remains to be a particularly challenging valuation object valuation practitioners therefore have to use proxies for biodiversity many of which are very simple single species habitats this paper presents a comprehensive and critical review of biodiversity valuation studies with special emphasis on biodiversity valuation in order to depict the state of the art in this research field it develops evaluation criteria so as to identify best practice applications and shows that the field of biodiversity valuation studies is rather heterogeneous regarding both valuation objects and valuation methods on the basis of our evaluation criteria and best practice studies we suggest that to account for the complexity and abstractness of biodiversity multi attribute approaches with encompassing information provision should be used that emphasise the roles biodiversity plays for human well being

aid for trade effectiveness complementarities with economic integration developing countries are increasingly using regional integration as a main policy lever when pursuing a trade led growth strategy and today deep preferential trade agreements go beyond trade policy negotiations and cover trade facilitation issues since aid for trade aft has been recognised as a powerful instrument for increasing developing countries trade capacity by targeting internal trade costs this article tests whether complementarities exist between this type of aid and economic integration using a gravity model on panel data for the period 1995 2005 results indicate that aft when combined with economic integration has been effective in increasing trade flows both south south and north south trade flows have benefited and the combination of the two instruments has been particularly effective in expanding the south s exports to the north finally when breaking down aft into categories assistance to trade related institutions seems to generate the strongest complementarities with economic integration

a review of the stern review on the economics of climate change the stern review calls for immediate decisive action to stabilize greenhouse gases because the benefits of strong early action on climate change outweighs the costs the economic analysis supporting this conclusion consists mostly of two basic strands the first strand is a formal aggregative model that relies for its conclusions primari ly upon imposing a very low discount rate concerning this discount rate aspect i am skeptical of the review s formal analysis but this essay points out that we are actual ly a lot less sure about what interest rate should be used for discounting climate change than is commonly acknowledged the review s second basic strand is a more intuitive argument that it might be very important to avoid possibly large uncertain ties that are difficult to quantify concerning this uncertainty aspect i argue that it might be recast into sound analytical reasoning that might justify some of the review s conclusions the basic issue here is that spending money to slow global warming should perhaps not be conceptualized primarily as being about consump tion smoothing as much as being about how much insurance to buy to offset the small change of a ruinous catastrophe that is difficult to compensate by ordinary savings

precautionary principle as a rule of choice with optimism on windfall gains and pessimism on catastrophic losses abstract the paper investigates a decision making process involving both risk and ambiguity differently from existing papers basili m chateauneuf a fontini f 2005 choices under ambiguity with familiar and unfamiliar outcomes theory and decision 58 195 207 chichilnisky g 2000 axiomatic approach to choice under uncertainty with catastrophic risks resources and energy economics 22 221 231 chichilnisky g 2002 in el shaarawi a h piegorsch w w eds catastropic risks encyclopedia of environmetrics vol 1 john wiley sons ltd chichester uk pp 274 279 we assume that in a choquet expected utility framework the decision maker is pessimistic with respect to unfamiliar catastrophic losses optimistic with respect to unfamiliar windfall gains and ambiguity neutral with respect to the familiar world a representation of the decision maker s choice is obtained that mimics the restricted bayes hurwicz criterion in this way a characterization of the precautionary principle is introduced for decision making processes under ambiguity with catastrophic losses and or windfall gains

migration and labour markets in oecd countries a panel cointegration approach this article examines the interaction between immigration and the host labour market of 14 organization for economic co operation and development oecd countries using nonstationary panel data methodology we estimate a trivariate vector error correction model vecm and derive causality tests to simultaneously assess the long and short term macroeconomic impact of newcomers on wages and unemployment levels in the host country the results suggest that an increase of migrants is likely to increase wages in the destination countries in the short run but to increase them in the long run there is no evidence of adverse effects on unemployment due to immigration in short and long term except for anglo saxon countries in the short term our findings also show that immigration is conditioned by levels of unemployment and wages especially in anglo saxon countries

uncertainty and climate change uncertainty is pervasive in analysis of climate change how should economists allow for this and how have they allowed for it this paper reviews both of

aid delivery through non governmental organisations does the aid channel matter for the targeting of swedish aid this paper analyses whether aid channelled through non governmental organisations ngos is less affected by selfish donor motivations and better targeted to needy recipient countries than aid distributed by state agencies we employ tobit and probit models and make use of an exceptionally detailed database that allows an assessment of the allocation of swedish aid channelled through ngos in comparison to the allocation of swedish official aid our analysis provides mixed results on the one hand ngos appear to be altruistic as far as available indicators on political and commercial motivations of aid can tell on the other hand needs based targeting of aid by ngos turns out to be surprisingly weak gdp per capita of recipient countries shapes the allocation of official aid but not that of aid channelled through ngos the headcount of absolute poverty has a significantly positive effect on aid allocation but its impact is not particularly strong when ngos are involved overall the swedish case supports the sceptical view that ngos are not necessarily superior donors compared to state aid agencies

a generalized design for bilateral trade flow models abstract this paper suggests a full interaction effects design to analyze bilateral trade flows this is illustrated with an unbalanced panel of bilateral trade between the triad eu15 usa and japan economies and their 57 most important trading partners over the period 1986 1997 our full interaction model finds empirical support for the new trade theory and linder s hypothesis we show that the omission of one or more interaction effects can result in biased estimates and misleading inference

openness and income the roles of trade and migration abstract this paper explores the relationship between openness to trade immigration and income per person across countries to address endogeneity concerns we extend the instrumental variables strategy introduced by frankel and romer 1999 we build predictors of openness to immigration and to trade for each country by using information on bilateral geographical and cultural distance while controlling for country size since geography may affect income through other channels we also control for climate disease environment natural resources and colonial origins most importantly we also account for the roles of institutions and early development our instrumental variables estimates provide evidence of a robust positive effect of openness to immigration on long run income per capita in contrast we are unable to establish an effect of trade openness on income we also show that the effect of migration operates through an increase in total factor productivity which appears to reflect increased diversity in productive skills and to some extent a higher rate of innovation

aid tying and donor fragmentation this study tests two opposing hypotheses about the impact of aid fragmentation on the practice of aid tying in one when a small number of donors dominate the aid market in a country they may exploit their monopoly power by tying more aid to purchases from contractors based in their own countries alternatively when donors have a larger share of the aid market they may have stronger incentives to maximize the development impact of their aid by tying less of it empirical tests strongly and consistently support the latter hypothesis the key finding that higher donor aid shares are associated with less aid tying is robust to recipient controls donor fixed effects and instrumental variables estimation when recipient countries are grouped by their scores on corruption perception indexes higher shares of aid are significantly related to lower aid tying only in the less corrupt sub sample this finding is consistent with the argument that aid tying can be an efficient response by donors when losses from corruption may rival or exceed losses from tying aid when aid tying is more costly as proxied by donor country size and income it is less prevalent aid tying is lower in the least developed countries consistent with the oecd development assistance committee s recommendation to its members

sustainability under uncertainty a deontological approach a deontological or kantian approach to intergenerational fairness suggests that sustainability criteria should be imposed as prior constraints on the maximization of social preferences concerning the distribution of welfare between present and future generations in particular it is plausible to assert that each successive generation holds a duty to ensure that the expected welfare of its offspring is no less than its own perceived well being this moral rule implies a bias against actions that generate present benefits but impose the risk of irreversible future losses if the preservation of options would allow for improved decisions as new information became available

species preservation versus development an experimental investigation under uncertainty the safe minimum standard sms is a decision rule to preserve renewable resources unless the social costs of doing so are intolerable while unpersuasive to many support for the sms has been advocated by some economists for settings involving irreversibility and a high degree of uncertainty the objective of this paper is to explore decision making involving species preservation versus development within an experimental laboratory setting and involving uncertainty the experimental design implements a number of prior game theoretic investigations of the sms bishop 1978 ready and bishop 1991 palmini 1999 involving insurance and lottery or combined games against nature the choices are between species preservation which possibly provides a cure for a disease or developing habitat leading to irreversible depletion econometric results from a random parameters logit model using responses from 117 participants across both u s and mexican university student samples and 9 treatment choices indicate that support for the sms varies across the type of game the imposed maximum regret condition concerning the relative magnitude of the costs of disease and net benefits of development a constructed measure of respondents risk aversion and other factors there is also strong evidence of unobservable heterogeneous preferences for preservation within our sample

incommensurability and monetary valuation at the very heart of environmental cost benefit analysis cba is the claim that benefits and costs can be expressed in terms of money and hence made comparable in particular cba puts all benefits and costs on a cardinal monetary scale it assumes monetary commensurability a significant literature in ethics and political philosophy has arisen which doubts this assumption but has so far had little impact on the theory or practice of cba in light of this the paper assesses the defense of monetary commensurability offered by cost benefit analysts and the wider economics literature

scientific progress and irreversibility an economic interpretation of the precautionary principle abstract we consider the problem of the optimal use of a good whose consumption can produce damages in the future scientific progress is made over time that provides information on the distribution of the intensity of damages we show that this progress induces earlier prevention effort only if prudence is larger than twice absolute risk aversion this paper thus identifies the class of quite restrictive but plausible conditions such that scientific uncertainties justify an immediate reduction of the consumption of a potentially toxic substance

volatility of development aid from the frying pan into the fire summary the paper building on the authors previous analysis examines the relative volatility of aid flows into developing countries and their domestic revenue using new data and three alternative measures of aid instability relative volatility vis a vis fiscal revenue unpredictability of aid disbursement relative to commitments and failure of aid to smooth fluctuations in aggregate income it finds that the volatility of aid flows is still much greater than that of domestic revenue and that this difference is not decreasing especially in very poor aid dependent countries this high volatility of inflows makes the macroeconomy hard to manage further the influence of aid has been procyclical and not countercyclical aid has failed to act either as a stabilizing force or as an insurance mechanism we argue that to counter these unwelcome trends donors need to be able to respond more speedily and effectively to large adverse shocks and their conditionalities need to become more flexible possibilities explicitly discussed elsewhere in this special section

communicating trade offs amid controversial science decision support for climate policy abstract the paper considers the decision that arises in climate policy where there is expert disagreement about the correct scientific model and where a group of stakeholders needs to agree on a common policy target policy choice is posed as a decision under knightian uncertainty where decision makers lack grounds for assigning a particular probability distribution across contending forecasting models the decision is then framed as one of balancing two competing objectives that plausibly align with the dominant concern of stakeholders from each side in the policy debate a decision criterion is proposed to identify options for compromise that balance these objectives in different ways the criterion spans three standard non bayesian decision criteria policies generated by the criterion are combined with visual tools to communicate what s at stake in an environmental policy decision in which stakeholders disagree both about scientific models and about the relative importance of risks to the environment versus risks to economic growth the approach summarizes information that could be useful to policy makers tasked with negotiating a compromise the framework is applied to climate policy using dice 2007 nordhaus 2008 the results highlight a basic asymmetry between the mistake of doing too little and that of doing too much that suggests a strong argument for avoiding the current status quo of global inaction

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

a quantitative minimax regret approach to climate change does discounting still matter abstract using cost benefit analysis to determine an optimal climate mitigation target is criticised especially because i it fails to sufficiently take into account low probability high impact events and ii results strongly depend on the discount rate used one of the alternative suggestions to inform policymakers about the right mitigation target that does take the risks associated with low probability high impact events explicitly into account is the minimax regret criterion we apply the minimax regret criterion quantitatively using an integrated assessment model with extreme values for climate sensitivity damage estimates and mitigation costs the goal is to analyse whether such a method leads to different results compared to standard cost benefit analysis and whether the results are still sensitive to the discount rate used we find that the minimax regret approach leads to more stringent and robust climate targets for relatively low discount rates and if both a high climate sensitivity and high damage estimates are assumed if one of these assumptions does not hold the difference between the minimax regret approach and standard cost benefit analysis is much smaller therefore we conclude that the discount rate used can still be of vital importance even when applying a minimax regret approach

specifications of social welfare in economic studies of climate policy overview of criteria and related policy insights an important assumption in economic studies of climate policy is the social welfare function this paper shows that applying distinct decision or social welfare criteria can result in different optimal policies of climate control notably if climate change impacts are uncertain first decision criteria in current climate economic studies are reviewed next the most important alternatives are discussed including their mathematical formalization and incorporation in economy climate models most of these alternative criteria suggest more stringent climate policies to be optimal than the standard discounted utilitarianism approach however several important welfare criteria have not or hardly seen any application in the economic analysis of climate policy we conclude that there is clear need for systematic research on this theme for which the current review provides a solid basis

political economy sectoral shocks and border enforcement in this paper we examine the correlation between sectoral shocks and border enforcement in the united states enforcement of national borders is the main policy instrument the u s government uses to combat illegal immigration the motivation for the exercise is to see whether border enforcement falls following positive shocks to sectors that are intensive in the use of undocumented labor as would be consistent with political economy models of how enforcement policy against illegal immigration is determined the main finding is that border enforcement is negatively correlated with lagged relative price changes in the apparel fruits and vegetables and slaughtered livestock industries and with housing starts in the western united states this suggests that authorities relax border enforcement when the demand for undocumented workers is high

aid and migration substitutes or complements this paper investigates the impact of aid on migration and identifies two channels bilateral aid influences migration by enhancing the information about labor market conditions in the destination country attraction effect total aid correlates with migration through increasing expenditure financing and hence wages in countries of origin push effect we compute the critical level of income above which emigration and income are substitutes which is about us 7 300 per capita in ppp 2000 prices for example brazil or russia we argue that for countries below this threshold there is a trade off between aid and migration policies a tightening of the migration policy is equivalent to a reduction of the level of aid by about 24 a comparison of skilled and unskilled migrations shows that the former are more sensitive to the attraction effect than the latter

disparities in employment productivity and output in the eu the roles of labour market governance and welfare regimes dunford m 1996 disparities in employment productivity and output in the eu the roles of labour market governance and welfare regimes reg studies 30 339 357 the aim of this paper is to develop a set of empirical and theoretical connections between geographies of inequality on the one hand and geographies of productivity and of the mobilization of human potential on the other to this end it presents a brief account of the current map of regional inequality in the eu disparities in gross domestic product per head are shown to depend on two elements differences in productivity and differences in the employment rate which it is argued reflects the capacity of an area to mobilize its human potential an analysis of data for nuts 1 regions in the eu and for neighbouring countries shows that the respective roles of productivity and employment rate differentials in explaining variations in output per head vary quite markedly from one region to another to interpret these empirical results it is argue

ethics of the discount rate in the stern review on the economics of climate change any comparison of the costs and benefits of climate change is dominated by the chosen discount rate but although the stern review emphasises the ethical nature of the parameters entering into its choice of a relatively low discount rate its discussion of the pure time preference parameter is unbalanced in particular no consideration is given to the role of agent relative ethics which i has a wellestablished philosophical pedigree going back to david hume ii is likely to correspond closely to world wide public attitudes towards intergenerational welfare and iii would entail discounting a unit of welfare accruing to future generations compared to an equal unit accruing to people alive today at a positive rate the authors also discuss the other ethical parameter upon which the discount rate depends namely the elasticity of marginal utility with respect to consumption in the conventional model this simultaneously reflects different aspects of inequality aversion as well as risk aversion which complicates its interpretation finally they discuss the divergence between market rates of discount and the low rate chosen in the review and the limitations on the one hand on the normative significance of market rates as well as the danger on the other hand of relying on rates chosen by elites or philosopher kings

income and employment disparities across european regions the role of national and spatial factors meliciani v 2006 income and employment disparities across european regions the role of national and spatial factors regional studies 40 75 91 the paper analyses the impact of trends in employment rates on income convergence across european regions looking at the evolution of entire distributions between 1988 and 1996 european regions have been characterized by a very slow process of income convergence across countries and by a lack of income convergence within countries while trends in labour productivity have contributed to income convergence trends in employment rates have had a diverging impact polarization in employment rates also appears to be the result of national factors and of the negative performance of objective 1 regions more than the consequence of the emergence of geographical clusters that go beyond national borders regional convergence unemployment spatial correlation non parametric estimation meliciani v 2006 les ecarts de revenu et d emploi a travers les regions d euro

aid trade and migration how do bilateral flows interact this paper takes as its point of departure the european commission s position set out in 2005 which laid clear emphasis on aid and trade as tools for controlling immigration we attempt to subject this position to empirical investigation we exploit data on bilateral aid trade and migration flows between developed and developing countries for the period 2000 10 adopting an instrumental variable approach to address the endogeneity issue due to potential simultaneity bias our results establish that increasing aid and trade with developing countries is likely to fail to contain immigration at least in the short run the pattern of results is consistent with the hypothesis that promoting development in migrant sending countries or cooperating with such countries to control migration outflows is not sufficient to lessen immigration increasing visa restrictions and controls at borders is generally controversial still the results imply that policymakers cannot attain their short term immigration goals with the so called smart solutions of aid and trade

us regional income convergence a spatial econometric perspective rey s j and montouri b d 1999 us regional income convergence a spatial econometric perspective reg studies 33 143 156 this study reconsiders the question of us regional economic income convergence from a spatial econometric perspective recently developed methods of exploratory spatial data analysis provide new insights on the geographical dynamics of us regional income growth patterns over the 1929 94 period strong patterns of both global and local spatial autocorrelation are found throughout the study period and the magnitude of global spatial autocorrelation is also found to exhibit strong temporal co movement with regional income dispersion a spatial econometric analysis of the familiar baumol specification reveals strong evidence of misspecification due to ignored spatial error dependence because of this dependence shocks originating in one state can spillover into surrounding states potentially complicating the transitional dynamics of the convergence process rey s j et montouri

on keynes s conception of the weight of evidence abstract various modern decision theories seek to capture the intuition behind keynes s conception of evidential weight keynes was nevertheless hesitant about the practical relevance of weight in the process of rational decision making because of the stopping problem of finding a rational principle to decide where to stop the process of acquiring information in forming a probability judgment before making a decision this paper discusses the relevance of the stopping problem by way of an inquiry into the nature properties and implications for rational decision making of keynes s conception of evidential weight it is argued that in practical choice situations the decision maker often decides where to stop the process of acquiring information by following keynes s advice to consider the degree of completeness of the available information before making a decision this method implies that the decision maker is able to arrive at an assessment of the dimension of what may be called her relevant ignorance by considering some examples of how the acquisition of new evidence may affect the decision maker s behaviour it is argued that it is in fact possible to talk reasonably about relevant ignorance or what are sometimes called unknown unknowns and that this concept might explain a range of human behaviours while this concept does not provide a rational principle to solve the stopping problem it does provide a method of inquiry for dealing with a number of paradoxes not solvable within the bayesian approach

remittances and working poverty abstractthis article shows that the level and the predictability of remittances reduce working poverty in receiving economies through their effects on labour market dynamics it takes advantage of the new cross country dataset ilo kilm 7th edition containing information on the share of individuals working for less than us 2 per day to identify the main impacts the article proposes a novel approach to deal with the endogeneity of remittances and migration in addition the results are robust to the possible error in measuring working poverty to the potential attrition bias and to the presence of various control variables