forest dependence and income distribution in a subsistence economy evidence from india abstract we examine an area of northern india where forestry acts to ameliorate the incidence of poverty and destitution though it does not otherwise contribute significantly to the reduction of income inequality the poor would be doubly disadvantaged without common property access to forest products conservation measures entailing curtailment in the right to common access pose a dilemma this issue is explored here

anticipated international environmental agreements abstract consider a situation in which countries anticipate an international environmental agreement iea to be in effect sometime in the future what is the impact of the future iea on current emissions after its announcement we show that the answer to this question is ambiguous we examine four types of ieas that aim to reduce pollution stock in the environment iea type 1 sets a level of emissions iea type 2 and iea type 3 set a percentage and a uniform cut vis a vis the business as usual policy respectively iea type 4 sets the policy that maximizes future joint benefits of the signatories we show that all of these agreements reach their goal in the long run but the intended benefits of these ieas can potentially be offset by the anticipatory non cooperative response of the signatories leading to an environmental degradation in the short run which iea is preferable depends on the targeted level emissions during the phase of cooperation when this target is above a certain threshold welfare under iea type 1 is larger than under iea type 2 which is larger than under iea type 3 moreover the highest level of welfare that can be attained under iea type 1 is above the highest level of welfare achieved by any one of the other three ieas

transfers to sustain dynamic core theoretic cooperation in international stock pollutant control international environmental agreements aiming at correcting negative externalities generated by transboundary pollution are difficult to achieve for many reasons important obstacles arise from asymmetry in costs and benefits and instability may occur due to the fact that coalitions of countries may attempt to do better for themselves outside of any proposed agreement in a static context it has already been shown that it is possible to achieve stability in the sense of the core of a co operative game by means of appropriately defined transfers between the countries involved however the transboundary pollution problems that are most important are caused by accumulated pollutants so that a dynamic analysis is required this paper provides a transfer scheme that yields a core property in a dynamic context the possibility of computing such transfers numerically is discussed

effects of wildlife resources on community welfare in southern africa abstract this paper demonstrates the importance of wildlife in the portfolio of environmental income in the livelihoods of poor rural communities living adjacent to a national park the results show that wealthier households use more wildlife resources in total than do relatively poor households however poorer households derive greater proportional benefit than wealthier households from the use of wildlife resources excluding wildlife understates the relative contribution of environmental resources while at the same time overstating the relative contribution of farm and wage income wildlife income alone accounts for about a 5 5 reduction in the proportion of people living below the poverty line furthermore wildlife income has an equalizing effect bringing about a 5 4 reduction in measured inequality regression analysis suggests that the likelihood of belonging to a wealthier category of income increases with an increase in environmental income as expected household wealth significantly and positively affects environmental income generated by households this seems to suggest that wildlife based land reform also needs to empower poor households in the area of capital accumulation while imposing restraints on the use of capital investments by well off households to harvest wildlife

persistent expected and innate poverty estimates for semi arid rural south india 1975 1984 this paper uses nine years of panel data on 170 rural households in southern india to calculate intertemporal measures of poverty these include measures of 1 expected poverty that identify households likely to remain poor on average during any year 2 innate poverty that identify households that are poor owning to deep rooted characteristics that cannot easily be changed in the short run and 3 persistent poverty that identify households whose incomes fall below a fixed poverty line over a number of years the poverty rates estimated for the sample with the three measures are 61 percent 48 percent and 22 percent respectively c 1993 academic press inc copyright 1993 by oxford university press

chronic poverty in the united states this paper proposes a method of measuring chronic and transitory poverty using an axiomatically sound additively decomposable index of aggregate poverty our approach is contrasted with alternative methods of measuring poverty persistence we use our method to measure chronic and transitory poverty in the united states during the 1980s and late 1970s and find that chronic poverty is a more serious problem than previously thought between the late 1970s and mid 1980s poverty not only increased it became more chronic and less transitory in nature this is true for the population as a whole and for some but not all of the subpopulations we considered the latter were defined according to race type of social unit and educational qualifications of the head of the social unit all empirical analyses are based on data from the panel study of income dynamics

testing for poverty dominance an application to canada the paper proposes and applies statistical tests for poverty dominance that check for whether poverty comparisons can be made robustly over ranges of poverty lines and classes of poverty indices this helps provide both normative and statistical confidence in establishing poverty rankings across distributions the tests which can take into account the complex sampling procedures that are typically used by statistical agencies to generate household level surveys are implemented using the canadian survey of labour and income dynamics slid for 1996 1999 and 2002 although the yearly cumulative distribution functions cross at the lower tails of the distributions the more recent years tend to dominate earlier years for a relatively wide range of poverty lines failing to take into account slid s sampling variability as is sometimes done can inflate significantly one s confidence in ranking poverty taking into account slid s complex sampling design as has not been done before can also decrease substantially the range of poverty lines over which a poverty ranking can be inferred

announcing climate policy can a green paradox arise without scarcity unintended consequences of a pre announced climate policy are studied within a framework that allows for competition between polluting and clean energy sources we show that early announcement of a carbon tax gives rise to a green paradox in that it increases emissions in the interim period between announcement and actual implementation irrespective of the scarcity of fossil fuels the paradoxical outcome is driven by consumption saving tradeoffs facing households who seek to smooth consumption over time and holds both when the announced implementation date is taken as a credible threat and when households are skeptical about the political will or capability of the government to implement the policy as announced

ethically flexible measures of poverty this paper introduces new measures of both relative and absolute poverty using the notion of representative income of a community corresponding to the censored income distribution these new measures satisfy the monotonicity and transfer axioms proposed by sen 1976 in all cases

the social welfare implications decomposability and geometry of the sen family of poverty indices in this paper we propose a unified framework for the sen indices of poverty intensity that shows an explicit connection between the indices and the common underlying social evaluation function we also identify the common multiplicative decomposition of the indices that allows simple and similar geometric interpretations and easy numerical computation jel classification c000 h000 o150 implications en termes de bien etre collectif decomposabilite et geometrie de la famille d indices de pauvretea la sen dans ce memoire les auteurs proposent un cadre d analyse integre des indices d intensite de pauvretea la sen qui souligne la relation explicite entre ces indices et la fonction sociale d evaluation commune qui les soustend les auteurs identifient aussi la decomposition multiplicative commune de ces indices qui permet d en donner des interpretations geometriques simples et idoines et de faire des calculs numeriques faciles

replications in development economics i examine replications of empirical papers in development economics published in the top 5 and next 5 general interest journals between the years 2000 through 2015 of the 1 138 empirical papers 71 papers 6 2 percent were replicated in another published paper or working paper the majority 77 5 percent of replications involved reanalysis of the data using different econometric specifications to assess robustness the strongest predictor of whether a paper is replicated or not is the paper s google scholar citation count followed by year of publication papers based on randomized control trials rcts appear to be replicated at a higher rate 12 5 percent

can a poverty index be both relative and absolute beginning with the work of a k sen 1976 poverty research has made extensive use of axioms to construct and evaluate distribution sensitive poverty measures an index is distribution sensitive if it satisfies sen s 1976 weak transfer axiom poverty decreases when income is transferred from a high income poor person to a low income poor person a distribution sensitive measure is appealing because it reflects the extent of deprivation among the poor and incorporates aspects of poverty that are ignored by standard measures such as the headcount ratio and poverty gap ratio in addition to the weak transfer axiom a number of other axioms that have considerable intuitive appeal when considered in isolation have been identified however several researchers e g thon 1979 kundu and smith 1983 and donaldson and weymark 1986 have shown that in some cases it is impossible to devise a poverty index that is consistent with the joint implications of otherwise reasonable axioms foster 1984 p 233 interprets the difficulties caused by the combined effects of two or more axioms as a warning not to measure too many aspects of poverty at the same time as a consequence it is now generally recognized that poverty axioms can have joint effects and it is important to explore the implications of such influences in a comprehensive investigation of subgroup consistent poverty measures foster and shorrocks 1991 examine the interaction between the scale invariance and translation invariance axioms 2 the first axiom requires a poverty index to be unaffected by the doubling of all incomes and the poverty line the second axiom requires a poverty index to be unaffected by equal increments to each income and to the poverty line 3 poverty indices that satisfy the first axiom are considered to be relative poverty indices while those satisfying the second are absolute poverty indices if a distribution sensitive index satisfying both axioms could be found it would provide a single measure of relative and absolute poverty and have considerable intuitive appeal in poverty measurement but one implication of foster and shorrocks 1991 work proposition 6 is that for the class of poverty measures they consider a distribution sensitive poverty index that is both relative and absolute cannot exist this note follows foster and shorrocks 1991 but concentrates on the implications of the joint effects of scale and translation invariance we drop the assumption of subgroup consistency and derive a proposition that has several important implications first for all poverty indices only those relying upon simple headcounts of the poor satisfy both the scale and translation invariance axioms this result clearly illustrates the strong restrictions imposed by combining scale and translation invariance with other standard axioms there can be no distribution sensitive poverty index that is relative and absolute second the result provides a simple characterization of the entire class of the headcount related poverty indices defined below third the result leads to a direct proof of the result

poverty and household size the widely held view that larger families tend to be poorer in developing countries has influenced research and policy the scope for size economies in consumption cautions against this view we find that the correlation between poverty and size vanishes in pakistan when the size elasticity of the cost of living is about 0 6 this turns out to be the elasticity implied by a modified version of the food share method of setting scales by contrast some measures of child nutritional status indicate an elasticity of unity consideration of the weight attached to child versus adult welfare may help resolve the non robustness of demographic profiles of poverty excerpt

international comparisons of poverty intensity index decomposition and bootstrap inference this paper proposes an alternative formulation for the sen shorrocks thon sst index of poverty intensity that is appropriate for survey data with sampling weights it also decomposes the sst index into the poverty rate the average poverty gap ratio among the poor and the overall gini index of poverty gap ratios to account for sampling variation in estimates of poverty intensity this paper uses the bootstrap method to compute confidence intervals and presents international comparisons using luxembourg income study lis data from the 1970s to the 1990s cross sectional and longitudinal analyses indicate that the percentage change in poverty intensity can be approximated by the sum of percentage changes in the poverty rate and average poverty gap ratio since changes in the overall gini index of poverty gap ratios are negligible in the early 1970s poverty intensity in canada and the united states was almost indistinguishable but in the 1970s canadian poverty intensity decreased large increases in poverty intensity occurred in the 1980s in the united states the united kingdom and sweden

the measurement of inequality and poverty a policy maker s guide to the literature abstract mathematical measures of poverty and inequality embody values that reflect the historical political social intellectual and ethical forces prevalent at the time of their formulation so that policy makers may select measures of poverty and inequality that are consistent with their values it is important to make explicit the value judgements implicit in the measures models designed to measure poverty and inequality fall into four categories absolute poverty measures absolute income measures relative poverty measures and relative inequality measures this article examines the principal models within each category and discusses the assumptions limitations and values implicit in the models

cross sectoral variation in the volatility of plant level idiosyncratic shocks we estimate the volatility of plant level idiosyncratic shocks in u s manufacturing we measure the variation in revenue total factor productivity not explained by either industry or economy wide factors or by establishments characteristics we find that idiosyncratic shocks are much larger than aggregate shocks accounting for about 80 of the overall uncertainty faced by plants plants in the most volatile sector are subject to about six times as much idiosyncratic uncertainty as plants in the least volatile we provide evidence suggesting that idiosyncratic risk is higher in industries where the extent of creative destruction is likely to be greater

redistributive taxation in a simple perfect foresight model abstract we investigate the redistributive potential of capital taxation in an intertemporal maximizing model of capital formation first even unanticipated redistributive capital taxation is severely limited in its effectiveness since it depresses wages second under any convergent redistributive tax policy which maximizes a paretian social objective the capital income tax will converge to zero independent of the factor supply elasticities these results are independent of workers holdings of capital

is there really a green paradox abstract in the absence of a co2 tax the anticipation of a cheaper renewable backstop increases current emissions of co2 since the date at which renewables are phased in is brought forward and more generally future emissions of co2 will decrease the effect on global warming is unclear green welfare falls if the backstop is relatively expensive and full exhaustion of fossil fuels is optimal but may increase if the backstop is sufficiently cheap relative to the cost of extracting the last drop of fossil fuels plus marginal global warming damages as then it is attractive to leave more fossil fuels unexploited and thus limit co2 emissions we establish these results by analyzing depletion of non renewable fossil fuels followed by a switch to a clean renewable backstop paying attention to timing of the switch and the amount of fossil fuels remaining unexploited we also discuss the potential for limit pricing when the non renewable resource is owned by a monopolist finally we show that if backstops are already used and more backstops become economically viable as the price of fossil fuels rises a lower cost of the backstop will either postpone fossil fuel exhaustion or leave more fossil fuel in situ thus boosting green welfare however if a market economy does not internalize global warming externalities and renewables have not kicked in yet full exhaustion of fossil fuel will occur in finite time and a backstop subsidy always curbs green welfare

counting and multidimensional poverty measurement this paper proposes a new methodology for multidimensional poverty measurement consisting of an identification method k that extends the traditional intersection and union approaches and a class of poverty measures m our identification step employs two forms of cutoff one within each dimension to determine whether a person is deprived in that dimension and a second across dimensions that identifies the poor by counting the dimensions in which a person is deprived the aggregation step employs the fgt measures appropriately adjusted to account for multidimensionality the axioms are presented as joint restrictions on identification and the measures and the methodology satisfies a range of desirable properties including decomposability the identification method is particularly well suited for use with ordinal data as is the first of our measures the adjusted headcount ratio we present some dominance results and an interpretation of the adjusted headcount ratio as a measure of unfreedom examples from the us and indonesia illustrate our methodology

assessing the rate of replication in economics we assess the rate of replication for empirical papers in the 2010 american economic review across 70 empirical papers we find that 29 percent have 1 or more citation that partially replicates the original result while only a minority of papers has a published replication a majority 60 percent have either a replication robustness test or an extension surveying authors within the literature we find substantial uncertainty over the number of extant replications

unveiling the ethics behind inequality measurement dalton s contribution to economics this article assesses the importance of dalton s 1920 paper in the economic journal for subsequent developments in income distribution analysis

the meaning of failed replications a review and proposal the welcome rise of replication tests in economics has not been accompanied by a consensus standard for determining what constitutes a replication a discrepant replication in current usage of the term can signal anything from an unremarkable disagreement over methods to scientific incompetence or misconduct this paper proposes a standard for classifying one study as a replication of some other study it is a standard that places the burden of proof on a study to demonstrate that it should have obtained identical results to the original a conservative standard that is already used implicitly by many researchers it contrasts this standard with decades of unsuccessful attempts to harmonize terminology and argues that many prominent results described as replication tests should not be described as such adopting a conservative standard like this one can improve incentives for researchers encouraging more and better replication tests

viewpoint replication in economics this examination of the role and potential for replication in economics points out the paucity of both pure replication checking on others published papers using their data and scientific replication using data representing different populations in one s own work or in a comment several controversies in empirical economics are used to illustrate how and how not to behave when replicating others work the incentives for replication are examined and proposals aimed at journal editors and authors are advanced that might stimulate an activity that most economists applaud but few perform

the role of local officials in new democracies evidence from indonesia this paper shows that the body of appointed officials that a new democracy inherits from the previous regime is a key determinant of the extent of electoral fraud and clientelistic spending in new democracies i develop a model that predicts that appointed officials have stronger incentives to influence voters during national level elections because of their career concerns i test the implications of the model using data from indonesia s transition to democracy both the pattern of alignment of electoral results between village and district levels and the pattern of subsequent turnover of appointed village heads corroborate the predictions of the model

cross country heterogeneity in intertemporal substitution abstract we collect 2735 estimates of the elasticity of intertemporal substitution in consumption from 169 published studies that cover 104 countries during different time periods the estimates vary substantially from country to country even after controlling for 30 aspects of study design our results suggest that income and asset market participation are the most effective factors in explaining the heterogeneity households in rich countries and countries with high stock market participation substitute a larger fraction of consumption intertemporally in response to changes in expected asset returns micro level studies that focus on sub samples of rich households or asset holders also find systematically larger values of the elasticity

poverty measurement with contaminated data a robust approach we examine the sensitivity of poverty indices to data contamination using the concept of the influence function and demonstrate that an important commonly used subclass of poverty measures will be robust under data contamination this is illustrated using simulations in this respect poverty and inequality indices have fundamentally different robustness properties we investigate both the case where the poverty line is exogenously fixed and where it must be estimated from the data

on the watts multidimensional poverty index and its decomposition summary the multidimensional extension of the watts poverty index may be expressed as a function of five determinants measuring respectively the impacts of what are defined in the paper as the watts poverty gap ratio the theil bourguignon index of inequality among the poor the overall headcount ratio the weights of the various dimensions and some measure of correlation between the various dimensions using the shapley decomposition we apply this index to world data on the per capita gdp life expectancy and literacy rates and derive the contributions of the five determinants defined above to the variation of this index during 1993 2002

on increasing risk inequality and poverty measures peacocks lyrebirds and exotic options we extend the rothschild and stiglitz 1970 notion of increasing risk to families of random variables and in this way link their approach to the concept of stochastic processes which are increasing in the convex order these processes have been introduced in seminal work by strassen 1965 doob 1968 and kellerer 1972 who showed that such processes have the same marginals as a martingale in fact we demonstrate that their results include the results of rothschild and stiglitz as a special case further we show that it makes sense to look at a larger class of processes which we refer to as lyrebirds we also show how these processes link up with the concept of second order stochastic dominance and are helpful in studying the dynamics of inequality and poverty measures further applications discussed include geometric and hyperbolic discounting exotic derivatives and real options

concepts of poverty and the poverty line abstract various approaches adopted in developed economies to distinguishing between the poor and non poor to setting a poverty line are reviewed these include the budget standard food ratio official subjective and relative poverty line methods as well as the analysis of indicators of deprivation there has been significant progress in recent years in the degree of sophistication involved and a movement away from approaches with a quasi absolute background however all the methods face formidable problems at conceptual and empirical levels and no single approach is likely to dominate

welfare approaches to the measurement of poverty a set of poverty indices is constructed which is based on an explicit view of the loss of social welfare which results from the existence of poverty in comparison t o a society in which poverty has been eliminated the indices are based on the entire distribution of income rather than only the incomes of the poor and thus embody the concept of relative deprivation formal properties of the indices are developed together with their relationship to welfare based inequality indices both are seen as subsets of a wider choice of measures dependent on a particular choice of reference distribution copyright 1987 by royal economic society

the closed loop motive for voluntary export restraints this paper examines the effects of voluntary export restraints in a dynamic game model of duopolistic competition it is shown that the imposition of a voluntary export restraint at the free trade level of imports increases the market price and the profits of all firms in the industry if free trade is identified as the closed loop subgame perfect cournot equilibrium of the game hence the authors conclude that the predictions of static cournot competition do not carry over to the dynamic case

climate contracts a game of emissions investments negotiations and renegotiations the paper presents a dynamic game where players can contribute to a public bad invest in technologies and write incomplete contracts despite the n 1 stocks in the model the analysis is tractable and the symmetric markov perfect equilibrium unique the framework helps to analyze emissions investments and international environmental agreements if only the emission levels are contractible then investments are suboptimally small if the contract is short term or close to its expiration date to encourage investments the optimal contract is more ambitious if it is short term and it is tougher to satisfy close to its expiration date and for countries with small investment costs if renegotiation is possible such an incomplete contract implements the rst best the results have important lessons for how to design a climate treaty

time consistent shapley value allocation of pollution cost reduction we study the problem of allocation over time of total cost incurred by countries in a cooperative game of pollution reduction we compute the characteristic function for all possible coalitions and apply the shapley value to determine a fair distribution of the total cooperative cost among players we design a mechanism for allocation over time of total individual cost so that the initial agreement remains valid for the whole duration of the game

dynamic poverty decomposition analysis an application to the philippines summary in this paper we propose a new method of poverty decomposition our method remedies the shortcomings of existing methods and has some desirable properties such as time reversion consistency and subperiod additivity our decomposition integrates the existing methods of growth redistribution decomposition and sector based decomposition because it allows us to decompose the change in poverty into growth and redistribution components for each group e g regions or sectors in the economy our decomposition works well in cases where only partial data are available for some periods it is also flexible and can be extended to have the following six components population shift within region redistribution between region redistribution nominal growth inflation and methodological change components the empirical application of the six way decomposition to the philippines for the period 1985 2009 shows that important policies for poverty reduction may differ across regions for example the autonomous region in muslim mindanao would need growth enhancing policies whereas eastern visayas would need policies to improve the income distribution our decomposition method has a wide applicability and may complement the poverty profile approach

assessing deprivation with an ordinal variable theory and application to sanitation deprivation in bangladesh the challenges associated with poverty measurement with a cardinal variable have received due attention during the last four decades but there is a dearth of literature studying how to meaningfully assess poverty with an ordinal variable this paper first proposes a class of simple intuitive and policy relevant poverty measures for ordinal variables these measures are sensitive to depth of deprivations unlike the headcount ratio moreover under appropriate restrictions the measures ensure that priority is given to the poorest among the poor while targeting monitoring and evaluating poverty alleviation programs to assess the robustness of poverty comparisons to alternative choices of parameters various stochastic dominance tests are developed some of which are themselves novel contributions to the stochastic dominance literature the empirical illustration documenting changes in sanitation deprivation in bangladesh showcases the measures ability to identify instances in which overall sanitation deprivation improved while leaving the poorest behind

poverty measurement an index related to a theil measure of inequality a major problem that arises in measuring poverty is the adequate expression in a poverty index of the information from the incomes of individuals below the poverty line this article evaluates several poverty indexes on the basis of their ability to satisfy five properties desirable for a poverty index the only index that satisfies all five properties is one related to a theil measure of inequality simulations show that this index and an index related to the coefficient of variation provide appropriate ranks for the desirability of various algorithms for transferring income to the poor

carbon leakage the green paradox and perfect future markets policies of lowering carbon demand may aggravate instead of alleviate climate change green paradox in a two period three country general equilibrium model with finite endowment of fossil fuel one country enforces an emissions cap in the first or second periods when that cap is tightened the extent of carbon leakage depends on the interaction of various parameters and elasticities conditions for the green paradox are specified all determinants of carbon leakage resulting from tightening the first period cap work in the opposite direction when the second period cap is tightened tightening the second period cap does not necessarily lead to the green paradox

a note on the bourguignon fields class of poverty indices abstract current poverty measurement methodology does not allow a definitive analysis of changes in distribution through time or between countries which involve changes in the number or proportion of poor people by revisiting the continuity and transfer axioms we show that within the bourguignon and fields 1997 class of poverty indices a range of value judgements can be accommodated as to what happens or should happen in the case that poverty line crossings result from regressive transfers in exposing this we hope to provide empirical analysts with wider scope to use the bourguignon fields poverty indices in an informed way

an aspect of variable population poverty comparisons abstract this paper demonstrates that the property of replication invariance generally considered to be an innocuous requirement for the extension of fixed population poverty comparisons to variable population contexts is incompatible with other plausible variable and fixed population axioms this fact raises questions about what constitutes an appropriate headcount assessment of poverty in terms of whether one should focus on the proportion or the absolute numbers of the population in poverty this observation in turn has important implications for tracking poverty and setting targets for its reduction or elimination

substitution between biofuels and fossil fuels is there a green paradox we show that i subsidies for renewable energy policies with the intention of encouraging substitution away from fossil fuels may accentuate climate change damages by hastening fossil fuel extraction and that ii the opposite result holds under some specified conditions we focus on the case of subsidies for renewable resources produced under increasing marginal costs and assume that both the renewable resources and the fossil fuels are currently in use such subsidies have a direct effect and an indirect effect working in opposite directions the direct effect is the reduction in demand for fossil fuels at any given price the indirect effect is the reduction in the current equilibrium price for fossil fuels which tends to increase the amount of fossil fuels demanded whether the sum of the two effects will actually result in an earlier or later date of exhaustion of the stock of fossil fuels depends on the curvature of the demand curve for energy and of the supply curve for the renewable substitute

issues in measuring and modeling poverty economists have relied heavily on household incomes or expenditures normalized for differences in household specific prices and demographics in their research and policy advice related to poverty and inequality recognizing the conceptual and empirical problems that confound such measures does not mean that they should be ignored instead it indicates the need for supplementary measures to capture the missing items implementing a genuinely multidimensional approach will often make the welfare rankings of social states more difficult but that fact points to the nonrobustness of low dimensional rankings this may have its own policy ramifications with the possibility of correspondence between policy instruments and welfare objectives the model types used to understand the poverty and inequity determination processes will be affected not only will there be more dependent variables to consider but variables will have potentially complex relationships these relationships will often be hard to empirically disentangle despite richer integrated and longitudinal data sets such data open rich and relevant agenda for research into the dynamics of poverty along multiple dimensions a simultaneous attack on these issues from all three fronts measurement modeling and data offers hope of establishing a credible empirical foundation for public action in fighting poverty

an axiomatic characterization of the watts poverty index abstract although the first distribution sensitive decomposable poverty index the watts index has long been neglected by the profession even when it was searching for a decomposable index this neglect is due partly to the lack of an axiomatic characterization for the watts index this paper adopts an axiomatic approach and complements the watts index with such a characterization under a set of reasonable axioms the watts index is the unique index if a poverty index is perceived as the absolute amount of social welfare loss due to poverty the watts index is relatively easy to apply it also satisfies all basic axioms for a good poverty index

tariffs and quotas under dynamic duopolistic competition abstract this paper analyzes tariffs and quotas in a differential game model of duopolistic competition for a homogeneous good equal import tariffs and quotas are compared with respect to resulting domestic prices the open loop and closed loop subgame perfect equilibria are derived the open loop game leads to domestic price equivalence however the closed loop game does not unless firms are myopic or the number of domestic firms becomes large thus we prove that the equivalence for static cournot competition does not carry over to the dynamic case

transitional restricted linkage between emissions trading schemes linkages between emissions trading systems are deemed an important element of the future climate policy landscape they are however difficult to agree and remain few and far between temporary restrictions on permit trading have potential to facilitate and gradually approach unrestricted full linkage we compare the relative merits of several link restrictions in this respect namely quantitative transfer limits border taxes on transfers exchange and discount rates and unilateral linkage to this end we develop a simple model to have a unifying framework which in conjunction with lessons we draw from real world experiences serves as a basis for a broader policy oriented discussion while quantitative restrictions seem to be the natural route to full linkage they can lead to uncertain distributional effects and weaken price signals these aspects are mitigated under a border permit tax but this policy seems harder to implement exchange rates have potential to adjust for programmes stringencies and raise ambition over time but can be challenging to select as experience corroborates unilateral linkage can be a convenient approach

measuring the intensity of poverty among subpopulations applications to the united states this paper proposes an approach to measuring the intensity of poverty within a group relative to that of the population to which the group belongs a poverty intensity index is presented which is easy to interpret and satisfies a number of desirable properties the intensity of poverty among racial and residential groups in various geographical locations is measured using 1980 united states census data

measuring poverty and differences in family composition the equivalence scales used to adjust for differences in family composition when measuring poverty exhibit considerable variation this paper suggests an alternative approach that allows for differences in social judgements regarding the treatment of different types of family and examines the relation with the choice of poverty measure the resulting dominance criteria cannot provide a complete ranking but allow the extent of disagreement to be identified their application is illustrated by the example of changes in child benefits copyright 1992 by the london school of economics and political science

measuring welfare poverty and inequality a class of poverty measures is identified the members of which satisfy strong monotonicity and transfer conditions these measures are closely related to indices of income inequality based on the notion of a mean equivalent income a restriction on the class of admissible measures allows poverty to be interpreted in terms of the loss in mean equivalent income resulting from the fact that some people are poor copyright 1987 by royal economic society

discontinuous losses from poverty generalized pα measures and optimal transfers to the poor abstract this paper examines the distributional properties of poverty measures which are discontinuous at the poverty line it is shown that among all the additive poverty measures only those measures with some discontinuous jump at the poverty line are such that it is optimal to allocate a given antipoverty budget either to the richest of the poor or to the poorest of the poor or to both a special class of such poverty measures is an extension of the well known p the properties of which are investigated

on three classes of differentiable inequality measures this paper examines the classes of inequality measures determined by three independence conditions concerning transfers of income the weight function involved is adapted to obtain poverty measures copyright 1998 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

us food aid and civil conflict we study the effect of us food aid on conflict in recipient countries our analysis exploits time variation in food aid shipments due to changes in us wheat production and cross sectional variation in a country s tendency to receive any us food aid according to our estimates an increase in us food aid increases the incidence and duration of civil conflicts but has no robust effect on interstate conflicts or the onset of civil conflicts we also provide suggestive evidence that the effects are most pronounced in countries with a recent history of civil conflict jel d74 f35 o17 o19 q11 q18 we are unable to determine whether our aid helps or hinders one or more parties to the conflict it is clear that the losses particularly looted assets constitutes a serious barrier to the efficient and effective provision of assistance and can contribute to the war economy this raises a serious challenge for the humanitarian community can humanitarians be accused of fueling or prolonging the conflict in these two countries medecins sans frontieres amsterdam 1

optimal taxation of capital income in general equilibrium with infinite lives this paper analyzes the optimal tax on capital income in general equilibrium models of the second best agents have infinite lives and utility functions which are extensions from the koopmans form the population is heterogeneous the important property of the models is the equality between the social and the private discount rates in the long run i find that the optimal tax rate is zero in the long run for a special case of additively separable utility functions i then determine the tax rates along the dynamic path and conditions that are sufficient for the local stability of the steady state

aggregate poverty measures the way poverty is measured is important for an understanding of what has happened to poverty as well as for anti poverty policy evaluation sen s 1976 pathfinding work has motivated many researchers to focus on the way poverty should be measured a poverty measure argued by sen should satisfy certain properties or axioms and the desirability of a poverty measure should be evaluated by these axioms during the last two decades many researchers have adopted the axiomatic approach pioneered by sen to propose additional axioms and develop alternative poverty measures the objective of this survey is to provide a clarification on the extensive literature of aggregate poverty measures in this survey we first examine the desirability of each axiom the properties of each poverty measure and the interrelationships among axioms the desirability of an axiom cannot be evaluated in isolation and some combination of axioms may make it impossible to devise a satisfactory poverty measure some axioms can be implied by other axioms combined and so are not independent some others are ad hoc and are disqualified as axioms for poverty measurement based on the interactions among axioms we identify the core axioms which together have a strong implication on the functional form of a poverty measure we then review poverty measures that have appeared in the literature evaluating the interrelationships among different measures and examining the properties of each measure the axioms each measure satisfies violates are also summarized in a tabular form several good poverty measures which have not been documented by previous surveys are also included

dynamic voluntary provision of public goods abstract the paper considers a dynamic public goods problem in which individuals contributions are accumulated over time analyzing the infinite duration dynamic game with continuous contributions and flow benefits the paper demonstrates that the free riding problem is aggravated when players contributions are conditional on the observable collective contributions hence without commitment an additional incentive to depress contributions arises a current contributor can free ride on all future contributions as well as on current ones

statistical tests of changes in u s poverty 1975 to 1990 since president lyndon johnson declared the war on poverty three decades ago scholars have devoted many volumes to analyzing characteristics of poverty evaluating effectiveness of antipoverty policies and measuring changes in poverty unfortunately most poverty studies have focused primarily on the incidence of poverty rather than on both the incidence of poverty and the income distribution within the poor population although a k sen s 23 seminal work on measurement of poverty demonstrated the importance of constructing and using a distribution sensitive poverty measure in evaluating poverty the u s federal government still uses the proportion of poor as virtually the only indicator of poverty with few exceptions such as bishop formby and smith 5 most recent scholarly works on poverty issues including sawhill 21 hanratty and blank 17 and slesnick 24 are also concerned exclusively with the incidence of poverty and use a single poverty line in this study we demonstrate that a more comprehensive look at poverty using distribution sensitive measures and multiple poverty lines yields a different picture of poverty changes over time compared to what official u s statistics portray practically the comparison of poverty changes can be decomposed into three parts 1 setting a poverty line an income threshold below which a person is defined as poor this step is also called the identification of the poor and is very important in poverty study 2 choosing a method to aggregate individual poverty into overall poverty different methods of aggregating may lead to different conclusions about poverty changes therefore an appropriate method is essential for poverty study and 3 statistical inference since conclusions about poverty changes are drawn from a random sample of the population it is important to know whether the estimated poverty

on the measurement of poverty official statistics in the united states and the united kingdom show a rise in poverty between the 1970 s and the 1980 s but scepticism has been expressed with regard to these findings in particular the methods employed in the measurement of poverty have been the subject of criticism this paper re examines three basic issues in measuring poverty the choice of the poverty line the index of poverty and the relation between poverty and inequality one general theme running through the paper is that there is a diversity of judgments which enter the measurement of poverty and that it is necessary to recognize these explicitly in the procedures adopted there is likely to be disagreement about the choice of poverty line affecting both its level and its structure in this situation we may only be able to make comparisons and not to measure differences and the comparisons may lead only to a partial rather than a complete ordering the first section of the paper discusses the stochastic dominance conditions which allow such comparisons illustrating their application by reference to data for the united states the choice of poverty measure has been the subject of an extensive literature and a variety of measures have been proposed in the second section of the paper a different approach is suggested considering a class of measures satisfying certain general properties and seeking conditions under which all members of the class which includes many of those proposed give the same ranking those sceptical about measures of poverty often assert that poverty and inequality are being confounded the third section of the paper distinguishes four different viewpoints and relates them to theories of justice and views of social welfare

equivalence scales and housing deprivation orderings an example using lebanese data housing deprivation orderings raise challenges as far as measurement is concerned the first challenge resides in the identification of an adequate variable that characterizes housing services consumed by households another challenge may arise in the comparisons of housing services consumption between households of different sizes and composition the last challenge may arise in the choice of a deprivation threshold and of a deprivation index in this article we address those challenges theoretically an empirical illustration is offered using lebanese data

unilateral production restrictions in a dynamic duopoly abstract this paper examines a dynamic game of exploitation of a productive asset by a duopoly a closed loop nash equilibrium of the game is constructed and used to analyze the effects of a unilateral production restriction surprisingly such unilateral action may result in a decrease of the long run asset s stock we also exhibit production restrictions that can result simultaneously in an increase of the asset s stock and the long run profits of the firm that is being imposed the production restriction moreover a unilateral decrease of the production of one firm can induce its rival to also decrease its production

minimum distribution sensitivity poverty aversion and poverty orderings abstract this paper introduces a measure of distribution sensitivity which is similar to arrow pratt s measure of risk aversion for a poverty index the measure also gauges poverty aversion and has a clear and straightforward interpretation using this measure we can define various classes of minimum distribution sensitive poverty indices we show that the ordering condition for such a class of poverty indices is simply a generalized poverty deprivation profile dominance properties and implications of this dominance condition are analyzed and poverty orderings by different classes of poverty measures are compared journal of economic literature classification number i32

a note on a troublesome axiom for poverty indices in a recent article in this journal clark hemming and ulph i98i henceforth chu review the recent literature on welfare indices for the measurement of poverty and propose two new such indices the axiomatic approach to the measurement of poverty which was initiated by sen 1976 has been from the very beginning plagued with difficulties with the transfer axiom and chu s paper is not altogether immune we show that one of their two indices does not satisfy the axiom and we take this opportunity to complement their review with a few remarks in particular we show that the index proposed by kakwani ig80a has the same defect let y be a non negative income vector and z the poverty line the number of people with income no larger than the poverty line is q and the total population n assuming y y2 n y gi z yi i i q are the income gaps following chu the reader is referred to their paper for the motivation let us define the equally distributed equivalent income gap as