the greenhouse effect damages costs and abatement the buildup of so called greenhouse gases in the atmosphere co2 in particular appears to be having an adverse impact on the global climate this paper briefly reviews current expectations with regard to physical and biological effects their potential costs to society and likely costs of abatement for a worst case scenario it is impossible to assess in economic terms the full range of possible non linear synergistic effects in the most favorable although not necessarily likely case of slow paced climate change however it seems likely that the impacts are within the affordable range at least in the industrialized countries of the world in the third world the notion of affordability is of doubtful relevance making the problem of quantitative evaluation almost impossible we tentatively assess the lower limit of quantifiable climate induced damages at 30 to 35 per ton of co2 equivalent worldwide with the major damages being concentrated in regions most adversely affected by sea level rise the non quantifiable environmental damages are also significant and should by no means be disregarded the costs and benefits of 1 reducing cfc use and 2 reducing fossil fuel consumption as a means of abatement are considered in some detail this strategy has remarkably high indirect benefits in terms of reduced air pollution damage and even direct cost savings to consumers the indirect benefits of reduced air pollution and its associated health and environmental effects from fossil fuel combustion in the industrialized countries range from 20 to 60 per ton of co2 eliminated in addition there is good evidence that modest e g 25 reductions in co2 emissions may be achievable by the u s and by implication for other countries by a combination of increased energy efficiency and restructuring that would permit simultaneous direct economic benefits savings to energy consumers of the order of 50 per ton of co2 saved a higher level of overall emissions reduction possibly approaching 50 could probably be achieved at little or not net cost by taking advantage of these savings we suggest the use of taxes on fossil fuel extraction or a carbon tax as a reasonable way of inducing the structural changes that would be required to achieve significant reduction in energy use and co2 emissions to minimize the economic burden and create a political constituency in support of the approach we suggest the substitution of resource based taxes in general for other types of taxes on labor income real estate or trade that are now the main sources of government revenue while it is conceded that it would be difficult to calculate the optimal tax on extractive resources we do not think this is a necessary prerequisite to policy making in fact we note that the existing tax system has never been optimized according to theoretical principles and is far from optimal by any reasonable criteria

can foreign aid reduce income inequality and poverty this paper s goal is to examine the effect of foreign aid on income inequality and poverty reduction for the period 1971 2002 since simple cross country regressions cannot be taken as true time series findings we focus on dynamic panel data techniques which allow accounting for potential simultaneity and heterogeneity problems we find some weak evidence that foreign aid is conducive to the improvement of the distribution of income when the quality of institutions is taken into account however this result is not robust this finding is consistent with recent empirical research on aid ineffectiveness in achieving economic growth or promoting democratic institutions

economic mobility and poverty dynamics in developing countries this study provides an introduction to this special issue of the journal of development studies on economic mobility and poverty dynamics in developing countries in addition to providing a conceptual framework it outlines how the contributions fit into the extant literature a series of regularities emerge across these studies the poor consist of those who are always poor poor at all dates and those who move in and out of poverty with the latter group tending to be strikingly large such movements in and out of poverty are apparent when looking at poverty in either absolute or relative terms changes in returns to endowments can be a potent source of increased incomes finally seemingly transitory shocks can have long term consequences the study concludes by drawing out the policy implications of these regularities

turnover in the afdc population an event history analysis the control group of families with female heads from the denver income maintenance experiment is utilized in this analysis of afdc turnover this study uses event history techniques a methodology that is more appropriate for exploring welfare dynamics than the logit approach of earlier work increases in age and the wage have significant negative effects on the rate of entering afdc a higher guarantee raises this rate significantly age and the guarantee have significant effects with opposite signs on the exit rate other variables are not systematically related to turnover the estimates are applied to projected changes in lengths of time spent on and off afdc and in afdc caseloads due to changes in the explanatory variables

unobserved variables and the elusive added worker effect consistent with recent empirical work this study finds no evidence of the added worker effect among married couples in the u s it is hypothesized that unobserved variables may be obscuring this added worker behavior this hypothesis is rejected the labor supply behavior of married women is influenced by the permanent and not the transitory nature of their spouses unemployment wives with frequently unemployed husbands have lower reservation wages yet apart from their measured human capital these same women face persistently lower wage rates and higher unemployment propensities in the labor market as a result married women with unemployed spouses are no more likely to be in the labor force and are actually less likely to be employed than observationally equivalent married women with employed spouses copyright 1991 by the london school of economics and political science

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

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

discounting in integrated assessments of climate change one of the key decisions that economists working on integrated studies of climate change face is the selection of the method of accounting for damages resulting from possible climate change across a long temporal scale and the method for the intertemporal comparison of the costs associated with possible greenhouse gas abatement strategies sensitivity tests show that the method applied and the resulting discount rate has a major impact on the optimal climate strategy the paper is intended to provide a short review of the various techniques that have been proposed and applied in various integrated models of climate change the underlying problem is as follows we can attempt to be consistent with the economic theory and empirical observations but in this case the derived discount rate will be on the order of 5 to 8 as a result even possibly significant damages from climate change turn out to be negligible when considered at their present value the artificially low discount rate based on ethical reasoning on the other hand makes our climate related decisions and resource allocations inconsistent with the majority of other public policy decisions

falling short of the promise poverty vulnerability in the united states and britain 1993 2003 the welfare state promises to moderate the duration and concentration of poverty the authors ask how well this promise has been fulfilled in the united states and britain from 1993 to 2003 they examine two aspects of poverty vulnerability during this period of welfare reform 1 its persistence and associated risk factors and 2 the efficacy of social transfers after accounting for measurement error sociodemographic characteristics and the impact of redistributive programs the authors find that poverty is often persistent and risk is concentrated especially in the united states moreover the british safety net appears to better protect those at risk

on the economics of private money abstract the application of laissez faire to the monetary system is a key ingredient of important proposals for monetary reform both new and old that seek to discipline government creation of money through competition this paper provides an overview of issues to be encountered in the construction of theoretical models of private monetary economies including consideration of market imperfections that have been hypothesized to arise in these systems further some descriptive history of the less regulated monetary systems of 19th century new york is undertaken with an emphasis on discussing the nature of market generated banking and monetary institutions in light of these critiques

poverty and change in the macroeconomy a dynamic macroeconometric model this paper analyzes the impact of macroeconomic activity on the level of poverty in the u s economy the authors us e a macroeconometric model of poverty in the united states where the rat e of poverty is presumed to depend upon changes in various indicators of macroeconomic performance and policy the authors empirically model the relationship between poverty and the macroeconomy with a hybrid mode l that employs a reduced form model to capture the dynamic interaction s among the data and a structural economic model to describe the contemporaneous relationship between the variables copyright 1993 by mit press

the damage costs of climate change a note on tangibles and intangibles applied to dice economic cost benefit analysis of the costs of greenhouse gas emission abatement and climate change often points towards limited abatement this note elucidates one reason why this result is obtained the way in which the intangible damages are treated and the utility function is specified on the basis of the dice model it is shown that by putting the intangible damages directly into the utility function and by assuming them to grow with per capita income the optimal reduction increases and in the second case more than triples compared to nordhaus s original results

poverty persistence and transitions in uganda a combined qualitative and quantitative analysis despite uganda s impressive reduction in income poverty during the 1990s recent evidence has shown there to be substantial mobility into and out of poverty this paper represents one of the first attempts to combine qualitative and quantitative information to understand the factors and processes underlying poverty transitions and persistence in some instances similar factors are identified by both qualitative and quantitative approaches including lack of key physical assets high dependency ratios and increased household size in other instances though one approach identifies additional factors not so easily identified by the other for example the impacts of excessive alcohol consumption in many cases the paper argues that there is considerable value added in combining the two approaches allowing us to provide a much richer understanding of many of the processes underlying poverty and poverty transitions

currency competition a hayekian perspective on international monetary integration currency internationalization is examined from the vantage point of friedrich hayek s contributions in the 1970s compared with received commentaries in which only an idealized case for private money is attributed to hayek this paper underscores other dimensions of hayek s work on money and currency hayek s case for choice in currency draws on his theory of competition anticipates competition between government suppliers of fiat money accommodates many aspects of international monetary integration and embodies a distinctive approach to monetary independence choice of exchange rate regime and the transnationalization of currency hayekian predictions are outlined for future developments in currency competition

slipping into and out of poverty the dynamics of spells this paper examines the dynamics of poverty previous analyses have examined either fluctuations in the male heads earnings or the frequency of poverty periods over a fixed time frame our approach depends on a definition of spells of poverty using this methodology we find that the majority of poor persons at any time are in the midst of a rather long spell of poverty the methodology also allows us to estimate that less than 40 percent of poverty spells begin because of a drop in the heads earnings while 60 percent of the spells end when the heads earnings increase thus researchers must focus on household formation decisions and on the behavior of secondary family members there has been a dramatic resurgence recently of discussion of the underclass the discussion is reminiscent of debates about poverty during the 1960s when the notions of a culture of poverty particularly as popularized by michael harrington s other america 1962 dominated both intellectual and policy thinking the idea of an underclass seems inconsistent however with much of the research on the dynamics of poverty during the 1970s that research using new longitudinal data seemed to show that the bulk of the poor were poor for only a few years the research also showed that the poor were a very heterogeneous group including a small minority of persistently poor the persistence of poverty is of interest both for understanding the phenomenon and for developing policy claims about dependency and separate life styles among the poor rest on assumptions about the long term nature of poverty questions

how well do static indicators identify the chronically poor abstract we investigate how well the most widely used static welfare indicators perform in identifying the chronically poor we propose a normative measure of performance the cost of a given impact on chronic poverty when transfers are contingent upon a purely static indicator using longitudinal household data from rural india we find that current consumption is not always a better indicator of chronic poverty than current income both however perform much better than other common indicators such as food share and access to land

do changes in the labour market take families out of poverty determinants of exiting poverty in brazilian metropolitan regions using survival models we test whether short term changes in the labour market affect poverty duration data are from the brazilian monthly employment survey such a monthly dataset permits more accurate estimations of events than using annual data but its panel follows households for a short period then methods that control for both right and left censoring should be used the results are as follows households with zero income are not those with the lowest chances of exiting changes in aggregate unemployment do not affect poverty duration and increasing wages in the informal sector has a negative effect on poverty duration

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

disaggregating the effect of the business cycle on the distribution of income this paper disaggregates total household income into a complete set of components and studies the comparative cyclicality of these com ponent to economic growth comparisons of the relative responsiveness to gnp growth of wages hours of work and total labor market income of heads and wives and transfer income sources of households are made across income race sex and age groups this provides a picture of the channels by which economic growth produces income change significant differences in elasticities are found to exist both between different income components and between different population groups for the same component the narrowing income distribution in times of high growth occurs primarily because of large elasticities on head s labor market income among the poor both wages and hours show evidence of cycli cality the labor market earnings of women both wives and household heads is far less responsive to growth cyclicality in transfer income varies enormously between population groups and by type of transfer

poverty alleviation as an economic problem economists distinguish between technological problems in which variable means confront a given end and economic problems in which given means are allocated across competing ends james buchanan and f a hayek each offer constructive criticisms of the standard definition of an economic problem arguing that economists too easily slide into mechanistic and teleological thinking building on these accounts we argue that there are three key dimensions to the economic problem exchange coordination and governance we then make a case that poverty alleviation is more like an economic problem than a technological one an economic problem with a small e we survey empirical evidence from economics anthropology and sociology indicating that poverty is not a simple lack of objectively identifiable resources but rather a multidimensional and socially embedded phenomenon understanding what poverty alleviation would even look like requires thinking through problems of exchange coordination and governance

data watch the panel study of income dynamics by collecting annual economic and demographic information from a large and representative sample of u s households for over a quarter century the panel study of income dynamics has compiled a remarkably useful set of microdata this article describes the psid and how its unique longitudinal and in some cases intergenerational features have been used for studies of intertemporal models of labor supply wages employment and job tenure consumption poverty dynamics extended family behavior and the intergenerational transmission of economic status

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

female participation and labor market attachment in rural canada this article explores the reasons for differences in female rural urban participation rates by estimating a dynamic model of participation allowing for unobserved heterogeneity and state dependence using canadian panel data the results suggest that overall observed differences in rural urban participation rates are primarily due to differences in observed socioeconomic characteristics however for women resident in low income households there is evidence that the operation of rural labor markets effectively lowers their participation rates copyright 2002 oxford university press

assessing the extent and nature of chronic poverty in low income countries issues and evidence discussions of chronic poverty have mostly considered its monetary dimensions with current evidence suggesting that such poverty is much more transient than chronic but chronic poverty is a real and important phenomenon potentially more important quantitatively than it first appears once account is taken of different methodological approaches and inevitable measurement difficulties the chronic poor have distinctive characteristics such as lack of assets or high dependency rates which may account for their persistent poverty the paper argues that it is also necessary to develop concepts of chronic poverty further covering relevant nonmonetary dimensions and not just relying on panel data

discounting and distributional considerations in the context of global warming the economics of global warming is reviewed with special emphasis on how the cost depends on the discount rate and on how costs in poor and rich regions are aggregated into a global cost estimate both of these factors depend on the assumptions made concerning the underlying utility and welfare functions it is common to aggregate welfare gains and losses across generations and countries as if the utility of money were constant but it is not if we assume that a e co2 equivalent dlubling implies costs equal to 1 5 of the income in both high and low income countries a pure rate of time preference equal to zero and a utility function which is logarithmic in income then the marginal cost of co2 emissions is estimated at 260 590 usd ton c for a time horizon in the range 300 1000 years an estimate which is large enough to justify significant reductions of co2 emissions on purely economic grounds the estimate is approximately 50 100 times larger than the estimate made by nordhaus in his dice model and the difference is almost completely due to the choice of discount rate and the weight given to the costs in the developing world as well as a more accurate model of the carbon cycle finally the sensitivity of the marginal cost estimate with respect to several parameters is analyzed

toward a comprehensive model of welfare exits the case of afdc pressures to reform the welfare system in the united states give rise to a need for improved information about individual welfare recipients using data from the survey of income and program participation and event history analysis this paper profiles the probabilistic tendencies of conditions associated with welfare exits the joint influences of policy economic conditions and individual circumstances and characteristics are considered in an attempt to build a comprehensive model of program turnover

testing a social safety net abstract standard benefit incidence analysis does not distinguish policy impacts on persistent poverty from transient poverty we offer an alternative approach based on actual and simulated joint distributions of consumption over time which allows us to distinguish the extent of protection against poverty from promotion out of poverty the approach is illustrated by an analysis of the distributional impact of changes in cash benefits introduced to compensate for other policy reforms in hungary cash benefits protected many from poverty but promoted few out of poverty the safety net s impact on poverty was largely due to higher average outlays rather than improved targeting

does welfare play any role in female headship decisions abstract previous studies have examined whether the welfare system has contributed to the dramatic increase in single parent families this paper explores why the results in this literature are sensitive to the presence of state fixed effects it considers one natural explanation namely that the composition of the population differs across states in ways that are related to welfare program generosity after controlling for individual effects the results provide no evidence that welfare raises the propensity to form female headed households for either whites or blacks these results illustrate the potential pitfalls of assuming that state factors are fixed over a long period of time they also suggest that previous studies may have overstated the effect of welfare programs on family structure

regression toward mediocrity in economic stature this paper provides estimates of the correlation in lifetime earnings between fathers and sons intergenerational data from the national longitudinal survey are used earlier studies conducted for the united states report elasticities of children s earnings with respect to parent s earnings of 0 2 or less suggesting extensive integenerational mobility these estimates however are biased downward by error contaminated measures of lifetime economic status estimates presented in this paper correct for the problem of measurement error and find the intergenerational correlation in income to be on the order of 0 4 this suggests considerably less intergenerational mobility than previously believed jel j62

macroeconomic adjustment and poverty in selected industrial countries the business cycle affects the incidence of poverty as shown by evidence from australia sweden the united kingdom and the united states many of the poor in these countries are outside the labor markets and transfers are a major source of income for many others but the unemployment and wage reductions that occur in recession increase the incidence of poverty major causes of poverty are unemployment in australia and the united kingdom and low wages in the united states similar cyclical effects are observed in sweden but a vast transfer program virtually eliminates poverty there are several policy options for combating poverty caused by recession a combination of unemployment insurance for a limited period followed by a job guarantee is the most effective policy toward unemployment whereas poverty caused by low earnings can be remedied by redistribution through the tax system

short term employment transitions of the canadian labour force rural urban differences in underemployment using data from the canadian survey of labour and income dynamics slid for the period 1993 1996 we examine patterns and determinants of labour force transitions of adequately employed and underemployed workers in an attempt to explore whether employment dynamics significantly differ between rural and urban workers so as to disadvantage rural economic performance the results indicate that rural adequately employed workers are significantly more likely to enter underemployment but once they are underemployed they also have a higher probability of re entering adequate employment further we also found weak evidence that the education level of workers has a lower impact on the probability of moving out of underemployment in rural than in urban areas in addition rural women are significantly less likely than their male counterparts and urban workers to enter adequate employment although the presence of young children does not seem to especially constrain the employment of rural women the results suggest that labour force transition in and out of adequate employment and particularly underemployment significantly differ between rural and urban workers and should be taken into account when evaluating employment hardship in rural canada

discounting of long term costs what would future generations prefer us to do decisions with intergenerational consequences may leave future generations worse off i e not be pareto optimal if costs and benefits are not discounted correctly we point out that this happens if the conventional social discount rate is applied to intergenerational costs with that rate the justification of intergenerational costs benefits of a project are invested and the proceeds can cover future costs leads to an inconsistency over the long term eventually the supposed benefits of any project become larger than the entire gnp the conventional approach commits an error by treating the time preference component of the discount rate as if it represented creation of wealth while it really involves only redistribution the time horizon of the redistribution is limited by the duration of market transactions especially loans thus we recommend a two step discounting procedure with the conventional social discount rate for the short term about 30 years and the growth rate of the economy for the long term data for gnp per capita growth in the us the uk france germany japan and the soviet union since the industrial revolution combined with data for net economic welfare per capita suggest an intergenerational discount rate in the range of 1 to 2 for practical application the rate at which costs and benefits will grow over time is just as important as the discount rate only the difference between these two rates matters for many environmental costs these rates may be close to each other during the next few generations this implies that some of the uncertainty in the prediction of rates cancels and one can treat the problem as if the effective rate were close to zero the consequence for costs such as global warming or nuclear power can be very significant the valuation can increase by more than an order of magnitude compared to values based on conventional discounting

the economic consequences of unwed motherhood using twin births as a natural experiment social scientists have long concluded that premarital childbearing exacerbates problems of both poverty and family instability out of wedlock and adolescent childbearing may reduce a mothers educational attainment lower the probability of her eventual marriage increase her probability of welfare recipiency and decrease family income the authors use an exogenous fertility event the birth of twins to estimate the economic effects of unplanned births the approach compares the economic outcomes of women experiencing premarital twin first births to those experiencing premarital single first births in the attempt to identify the consequences of an unplanned birth upon womens future fertility and marital decisions education labor force participation labor earnings welfare receipt and poverty status 1970 and 1980 us census micro data are used to identify twin births to unmarried women analysis found large short term effects of unplanned births on labor force participation poverty and welfare recipiency among unwed mothers but not among married mothers furthermore most adverse economic effects of unplanned motherhood dissipate over time for whites but larger and more persistent negative effects weigh upon black unwed mothers

the economic consequences of absent parents we examine the effects of family structure on economic resources controlling for unobservable family characteristics in the year following a divorce family income falls by 41 percent and family food consumption falls by 18 percent six or more years later the family income of the average child whose parent remains unmarried is 45 percent lower than it would have been if the divorce had not occurred marriage raises the long run family income of children born to single parents by 45 percent these estimates are substantially smaller than the losses that are implied by cross sectional comparisons across family types

child support enforcement and welfare caseloads although there is a large body of research devoted to the issue of the determinants of welfare caseloads none of these studies has incorporated the effects of child support enforcement cse we employ annual state panel data from 1980 to 1999 and find that states with more effective cse have significantly lower welfare caseloads the improvement in cse over this period reduces welfare caseloads by about 9 percent in 1999 we also discover that individual child support variables may not be good indicators of state cse vigor and that a cse index that includes multiple dimensions of cse is more likely to capture the multiplicative functions of cse

non parametric analysis of poverty duration using repeated cross section an application for peru abstractusing repeated cross section annual data for peru spanning 2002 2011 and non parametric duration analysis our estimates support the hypothesis that both stay in and exit from poverty non poverty depends on the duration and sequence of poverty non poverty spells we find that longer periods in poverty reduce the probability of leaving poverty and conversely longer periods spent out of poverty reduce the chance of falling back into poverty also we show that at least in the last decade of high economic growth the probability of staying in poverty was lower than staying in non poverty and the probability of re entering in poverty was higher than re entering in non poverty being both differences growing with the number of accumulated spells past experiences of poverty and non poverty seem to be essential to predict the future status of poverty

escaping poverty and becoming poor who gains who loses and why abstract different households have followed very different economic trajectories this study of 35 north indian villages shows members of 11 1 of 6 376 households in these villages have overcome poverty in the last 25 years while members of another 7 9 have fallen into poverty households escape from poverty is assisted by one set of factors but an entirely different set of factors is associated with households decline two distinct sets of policies are required thus one set to promote escape from poverty and another set to arrest decline into poverty poverty has some distinctly local antecedents a methodology for tracking changes in poverty at the local level is developed that community groups and others can use to assess change and examine causes

friedman versus hayek on private money review essay abstract few areas of economic activity can claim as long and unanimous a record of agreement on the appropriateness of governmental intervention as the supply of money benjamin klein 1974 p 423

does poverty trap rural malagasy households this paper studies the determinants of poverty dynamics in several rural areas from madagascar a particular attention is devoted to testing if rural poverty persistence in madagascar could be explained by a vicious circle leading to a poverty trap annual poverty transitions retrieved from an original household panel data survey covering the 1996 2006 periods show that differences in household and environment characteristics are clearly associated with di erences in poverty transitions probabilities poverty vulnerable households have higher dependency ratio and are less educated they also show different income generating activities pattern they cultivate less market oriented crops and have more vulnerable activities such as agricultural wage work a markovian poverty transition model is used to evaluate the role of past poverty in this situation past poverty is allowed to have both an intercept and a slope effect on poverty transitions probabilities our results show that a substantial share of the di erences in household poverty transitions probabilities is attributable to past poverty status these results encourage the development of social protection to prevent households to fall into a poverty trap as well as speciffic measures to encourage paths out of poverty traps francais cet article etudie les determinants de la dynamique de la pauvrete dans plusieurs zones rurales de madagascar une attention particuliere est portee a l identification d un eventuel effet deletere de la pauvrete passee sur la pauvrete future pouvant conduire a un cercle vicieux de perpetuation de la pauvrete le papier se base sur l etude des transitions annuelles sur et sous le seuil de pauvrete observees sur un panel de menages ruraux malgaches entre 1996 et 2006 un modele markovien est utilise pour evaluer le role des caracteristiques des menages de l environnement et de la pauvrete passee dans la probabilite de passer sur ou sous le seuil de pauvrete les resultats montrent que certaines caracteristiques des menages et de l environnement sont clairement associees a differences dans les probabilites de transitions sur et sous le seuil de pauvrete en particulier les menages vulnerables a la pauvrete ont un rapport de dependance plus eleve sont moins eduques et ont une composition de revenus differentes ils sont notamment moins orientes vers les cultures agricoles et plus orientes vers des activites precaires comme le salariat agricole un effet deletere de la pauvrete passee sur le risque d etre pauvre dans le futur est egalement mis en evidence il passe a la fois par un effet de pente et un effet de niveau ces resultats soulignent la necessite de mettre en place des politiques specifiques contre la vulnerabilite a la pauvrete d une part et contre la pauvrete de long terme d autre part

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

has children s poverty become more persistent iffood stamp benefits are counted as income there is little change in estimates ofpersistent povertyfor children between the late 1960s and early 1980s however the absence of change in persistent poverty masks a number of important changes in the demographic and statistical structure ofpersistent poverty these changes include increasing inequality in the distribution of permanent socioeconomic position greater dependence on social assistance and the more familiar demographic changes such as increased numbers of single parent families higher educational attainments of parents and decline in family size

expected poverty under risk induced welfare variability two of the most widely accepted stylised facts about agriculture in south asia sub saharan africa and elsewhere are that income is highly uncertain from one year to another and that deep and widespread poverty exists and yet there has been very little analysis of the joint problems of poverty and risk this paper offers a methodological approach to the issue of how risk affects poverty and applies it to household level data for dry areas of rural india the following questions are addressed under what conditions can one expect an increase in the riskiness of an income or consumption stream to increase poverty how should one measure the contribution of risk to poverty and what long term benefits in terms of reduced poverty can be expected from policies aimed at stabilising incomes of the poor such policies have been widely discussed in the indian subcontinent of late and their effect on rural

the dynamics of low income in rural areas phimister e upward r and vera t oscano e 2000 the dynamics of low income in rural areas reg studies 34 407 417 this paper provides a picture of the dynamics of low income in rural areas by comparing a rural sample with a non rural sample using the british household panel survey the paper considers income distributions and inequality low income mobility the distribution of low income spells the characteristics of those on low incomes and possible trigger events associated with low income entry and exit across the two samples although in absolute terms somewhat less important than in non rural areas the results confirm that low income in rural areas is significant and emphasize a number of important dynamic aspects of the problem such as the extent of persistent low income among the rural poor phimister e upward r et vera toscano e 2000 la dynamique du faible revenu dans les zones rurales reg studies 34 407 417 a partir du british household panel survey un sondage aupres des m

chronic and transient poverty measurement and estimation with evidence from china abstract the paper contributes to the measurement of poverty and vulnerability in three ways first it proposes a new approach to separating poverty into chronic and transient components second it provides corrections for the statistical biases introduced when using a small number of periods to estimate the importance of vulnerability and transient poverty third it applies these tools to the measurement of chronic and transient poverty in china using a rich panel data set that extends over 17 years alternative measurement techniques are found to yield significantly different estimates of the relative importance of chronic and transient poverty the precision of the estimates is also considerably enhanced by simple statistical corrections

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

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

a budget based definition of poverty an approach to defining poverty through a basic needs budget bnb is presented which takes account of families differing needs for child care and transportation and of regional differences in housing costs taxes and noncash benefits from governmental and private sources are also accounted for the bnb poverty rate for single parents for 1989 is 47 percent compared to 39 percent under the official method almost a quarter of single parents holding full time jobs are counted as poor under the bnb method radical reduction in both the welfare rolls and the poverty rate would require government assurance of child care and medical care to single parents

a poverty dynamics approach to social stratification the south african case abstract the wave of upbeat stories on the developing world s emerging middle class has reinvigorated a debate on how social class in general and the middle class in particular ought to be defined and measured in the economics literature most scholars agree that being middle class entails being free from poverty which means being able to afford the basic things in life not only today but also tomorrow in consequence there is an increasing tendency to define the middle class based on a lack of vulnerability to poverty in this paper we strengthen and expand on these existing approaches in three ways first we incorporate the differentiation between the middle class and a non poor vulnerable group into a broader social stratification schema that additionally differentiates between transient and chronic poverty second in estimating the risk of poverty we employ a multivariate regression model that explicitly allows for possible feedback effects from past poverty experiences and accounts for the potential endogeneity of initial conditions unobserved heterogeneity and non random panel attrition four factors insufficiently addressed in existing studies third we highlight the value of paying attention to these conceptual and modelling issues by showing that class divisions based on monetary thresholds inadequately capture a household s chances of upward and downward mobility we then apply our conceptual framework to the south african case we find that only one in four south africans can be considered stably middle class or elite access to stable labor market income is a key determinant of achieving economic stability a lack of jobs as well as the prevalence of precarious forms of work drive high levels of vulnerability which in turn constrains the development of an emergent middle class not only in south africa but potentially also in other parts of the developing world that face similar labor market challenges

why are child poverty rates higher in britain than in germany a longitudinal perspective we analyze why child poverty rates were much higher in britain than in western germany during the 1990s using a framework focusing on poverty transition rates child poverty exit rates were significantly lower and poverty entry rates significantly higher in britain we decompose these cross national differences into differences in the prevalence of trigger events changes in household composition household labor market attachment and labor earnings and differences in the chances of making a poverty transition conditional on experiencing a trigger event the latter are the most important in accounting for the cross national differences in poverty exit and entry rates

poverty in america trends and explanations despite robust growth in real gdp per capita in the last three decades u s poverty rates have changed very little we summarize some basic facts about poverty in the united states relying on a combination of previously published data from the census bureau and our own tabulations based on current population survey data we then discuss and evaluate four determinants of changes in the poverty rate that have been advanced in the literature the impact of labor market opportunities the role of changes in family structure the role played by government antipoverty programs and the role of immigration

natural resources national accounting and economic depreciation abstract the current value hamiltonian in an aggregate optimal growth problem with heterogeneous capital stocks including exhaustible renewable and environmental stocks is the nnp function routine substitutions reveal that the using up of natural resource stocks is representable as easy to interpret economic depreciation magnitudes we obtain true nnp inclusive of natural resource stock diminution implications for actual national accounting practices are also discussed

effects of family instability income and income instability on the risk of a premarital birth in this study i contrast hypotheses about the effects of family structure on premarital birth risks with three income hypotheses 1 a low income hypothesis that the risk of a premarital birth is higher for women from disadvantaged economic backgrounds because they possess fewer or less attractive economic opportunities 2 a permanent income and transitory income hypothesis that uncertainties generated by unexpected fluctuations in family income increase premarital birth risks net of absolute income levels and 3 an income level and income change hypothesis that downward trends in family income reflect worsening socioeconomic opportunities that increase premarital birth risks net of absolute income levels i use prospective income and retrospective parental histories in the u s national longitudinal survey of youth to determine if the effect of family instability is an artifact of low unstable or declining income in the family of origin excerpt

entry and exit transitions in a government transfer program the case of aid to families with dependent children this study analyzes determinants of entry and exit transitions in the aid to families with dependent children program using data from the panel study of income dynamics the principal findings are that state controlled policy parameters such as the afdc guarantee the payment received when earnings are zero and the entry income limit the income level at which families become eligible for afdc payments have a significant but asymmetric impact on these transitions in addition evidence on the relationship between wages and such transitions tends to support efforts at reducing welfare dependency through programs which raise wages

poverty transition and persistence in ethiopia 1994 2004 summary this study analyzes the persistence of poverty in both rural and urban areas in ethiopia during 1994 2004 the key finding is that households move frequently in and out of poverty but the difficulty of exiting from poverty like the chance of avoiding slipping back increases with the time spent in that state and varies considerably between male and female headed households our results imply that it is important to design anti poverty policies both to hinder households from slipping into extreme poverty and to minimize the length of the poverty spell for households once they have fallen into it

identifying vulnerability to poverty a critical survey in the economic literature on poverty various methods have been proposed for measuring a phenomenon known as vulnerability however after more than a quarter century of research no consensus has been reached on how to identify such vulnerable individuals within a given population some misunderstandings have also arisen from the overlapping of other closely related concepts such as the expectation of being poor expected poverty multi period poverty and risk exposure this paper offers a detailed conceptual discussion on vulnerability to poverty and its related elements reviewing a wide range of identifying criteria provided in the literature it is found that according to the state of the art in this field of research two key elements stand out in identifying vulnerable individuals an expected well being below the poverty line and a relevant risk of falling into poverty due to downside deviation from a reference level of well being the traditional classification of vulnerability approaches has been updated into four groups i those that stress the element of exposure to risk ii those that emphasize the element of expected poverty iii those that define vulnerability through a utility gap and iv those that are supported by a mean risk dominance criterion

climbing out of poverty falling back in low income stability in spain the study of the probability of entering or escaping a low income spell is not sufficient to fully describe a household s experience in deprivation if poverty spells are recurrent in time the persistency of poverty for a given household is not completely described unless the household s likelihood of a fall back into deprivation shortly after exit is considered it is found that by combining the re entry equation results with those of the exit equation one can discuss in a comprehensive way which household characteristics promote welfare stability or instability and poverty persistence or transience results indicate that one third of households who manage to leave poverty in spain return to it shortly after exit this upward income mobility if maintained for a year appears to enable a state of non poverty for a lengthy period better educated households and households with a spouse are more stable in their income level also the point reached in the income distribution after a jump out of poverty

one kind of freedom poverty dynamics in post apartheid south africa abstract a 1993 south african living standards survey documented the legacy of apartheid in the form high levels of inequality and human insecurity drawing on a 1998 re survey of households in the 1993 study this paper explores whether this legacy has been superseded or whether apartheid s end has been only one kind of freedom that has left households in a poverty trap from which they cannot escape after proposing a theoretically grounded dynamic poverty typology that distinguishes stochastic from structural poverty transitions the paper goes on to estimate that significant numbers of the south african poor are potentially trapped in a structural poverty trap and lack the means to escape poverty over time

housing mobility programs and economic self sufficiency evidence from a randomized experiment this paper examines the effects of a randomized housing voucher program on individual economic outcomes public housing residents who are offered relocation counseling together with housing vouchers that can only be redeemed in low poverty areas experience a reduction in welfare receipt of between 11 and 16 compared to controls these effects are not accompanied by changes in earnings or employment rates as measured by unemployment insurance records offering families unrestricted housing vouchers without additional counseling appears to have little effect on economic outcomes

escaping and falling into poverty in india today the study examines the dynamic nature of movements into and out of poverty over a period when poverty has fallen substantially in india the analysis identifies people who escaped poverty and those who fell into it over the period 2005 to 2012 the analysis identifies people who escaped poverty and those who fell into it over the period 2005 to 2012 using panel data from the india human development survey for 2005 and 2012 we find that the risks of marginalized communities such as dalits and adivasis of falling into or remaining in poverty were higher than those for more privileged groups some but not all of these higher risks are explained by educational financial and social disadvantages of these groups in 2005 results from a logistic regression show that some factors that help people escape poverty differ from those that push people into it and that the strength of their effects varies

the impact of global warming on agriculture reply in our paper with daigee shaw mendelsohn et al 1994 henceforth mns we developed a new approach to measuring the impact of global warming on agriculture we call this approach ricardian because it relies upon standard rent theory as a way of identifying the impact of changes on net economic welfare we compared the ricardian approach with the traditional production function approach which uses agricultural production functions but has great difficulty identifying all the other adjustments that farmers make in response to changing external conditions the ricardian approach is particularly well suited to a tremendously heterogeneous sector because it can rely upon reduced form estimation and does not require the impossible task of constructing structural models of hundreds of crops in thousands of locations estimating the model using cross sectional data on climate farm land prices and other economic and geophysical data for almost 3 000 counties in the united states the ricardian approach shows a significantly lower estimated impact of global warming than the traditional productionfunction approach indeed our preferred statistical approach showed modest benefits of climate change in his comment on mns in this issue of the review william r cline 1996 raises three concerns first he notes that the analysis assumes that output prices remain constant second he asserts that the analysis assumes that the supply of water for irrigation is perfectly elastic third he calls for testing the results of the model on alternative climate scenarios from general circulation models gcm s his first and third points are useful additions while the second is incorrect our ricardian approach assumes that the existing pattern of agricultural land rents and land prices reflects the long run equilibrium economic effect of climate and other geophysical and economic variables standard economic reasoning shows that by calculating the estimated effects of perturbing the climatic variables we can project the impact of climate change on economic welfare we do so in a partial equilibrium approach which assumes that output prices are invariant to the climate and cline is correct to point out that this might lead to biased estimates because the partialequilibrium estimates tend to underestimate damages and overestimate benefits in fact the bias is small given standard parameters for agricultural demand and supply functions we illustrate this point using linear supply and demand functions for agricultural crops let demand be given by qd ao a1p while supply is q po pi p where q and p are output and price and ai and i are parameters in equilibrium at the old climate market outcomes are qo and po now suppose that global warming contracts supply so that

the taxation of the poor this paper uses microsimulation modeling to estimate the annual burden offederal state and local taxes on the poor in two states we find that in 1988 the average burden of taxation on poorfamilies and individuals was 15 3 percent in massachusetts and 18 percent in new york as most of the burden is due to state and local taxes federal tax reform had only a minor impact on the overall tax burdens faced by the poor though the analysis is for two state we argue that the basic results are applicable for most other states given the high incidence of persistent poverty among those who are poor in any given year we argue that annual burdens provide a good indication of long run burden for a significant proportion of the poor

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

explaining the black white gap in labor force participation among women heading households for the first time in this century black women are participating in the labor force at lower rates than are white women the black white gap in female labor force participation is driven by those in the severest need of income women heading households the author compares three explanations of the black white gap in labor force participation among female household heads lack of human capital lack of opportunities resulting from industrial restructuring and disarticulation from mainstream institutions as described by theories of the underclass using a representative national sample from the panel study of income dynamics he finds that lower rates of labor force participation among black women heading households are determined by black white differences in human capital as well as by characteristics associated with a breakdown in the processes linking black women to the labor market overall the largest impediments to labor force participation among women heading households are dropping out of high school having a child under the age of six in the household and being a long term welfare recipient

labor supply and marital separation panel data are used to estimate the effect of marital separation on labor supply female labor supply increases substantially and male labor supply declines marginally lending support to the theory of specialization within the household the most interesting finding is that women began to increase their labor supply well before the actualsplit occurs suggesting either that shocks to labor supply change divorce probabilities or that women with a higher likelihood of divorcework more this argument is pursued by constructing and estimating a simultaneous model of labor supply and divorce risk copyright 1986 by american economic association

pathways out of rural poverty a case study in socio economic mobility in the rural philippines exploiting unique household panel data covering a 30 year period this paper attempts to analyse the patterns of poverty exits by examining socio economic mobility in a philippines village macroeconomic growth was a major factor explaining poverty exit probabilities until the early 1980s after the 1980s poverty exit paths through agricultural ladder narrowed schooling and growth became equally important factors owing to the increased returns to schooling and labour endowments also became important for the lower but not upper social strata providing an economic incentive to have more children for the poor surprisingly we find no evidence of state dependence in poverty spells once observable factors are taken into account copyright 2007 oxford university press

measuring the existence value of wildlife what do cvm estimates really show two research programs are brought together to contribute to the growing body of work on alternatives to standard welfare based approaches to environmental valuation and policy the first is the theoretical literature undermining the new welfare

poverty dynamics in brazilian metropolitan areas an analysis based on hulme and shepherd s categorization 2002 2011 abstract ever more sophisticated studies on the methodological approach and the conceptual scope of poverty have led to a consensus among scholars on the dynamic characteristic of this phenomenon in other words the existence of an in and out of privation movement of individuals and families within this context hulme and shepherd 2003 defined five groups according to the location of the punctual and average indicators of poverty vis a vis the poverty line this paper s objective is to adapt this typology to brazil using pme monthly job survey micro data for the 2002 2011 timeframe and the six brazilian metropolitan regions covered by pme as well as by estimating a multinomial logit investigate which family characteristics relate to a greater or lesser chance of belonging to each of the chronic and transitory poverty categories categorization allows observation that despite a sweeping across the board decline in the percentage of families in all poverty categories in the past decade those families always or usually poor display demographic socioeconomic access to and insertion into the labor market categories which differ from families in transitory poverty or classified as never poor moreover northeastern metropolitan regions salvador and recife have higher percentages of chronic or transitory poverty multinomial logit estimates make it possible to verify that families whose members have completed secondary schooling or college or hold a higher qualified occupation stand lesser chances of entering into or remaining in poverty results call for differentiating among poor families as they enter into or leave poverty which is tantamount to saying that the dynamics of poverty must be taken into account as public policies are drawn up

the causes of free bank failures a detailed examination abstract in this paper we propose and test a new explanation of bank behavior during the free banking era 1837 1863 arguing against the conventional view that free bank failures were due to wildcat banking we claim they were caused by falling asset prices confronting both explanations with our new and detailed data set developed from state auditor reports we find that the falling asset price explanation of free bank failures explains far more failures than does the wildcatting hypothesis