product differentiation and oligopoly in international markets the case of the u s automobile industry this paper develops and estimates a model of the u s automobile industry on the demand side a discrete choice model is adopted that is estimated using micro data from the consumer expenditure survey the estimation results are used in conjunction with population weights to derive aggregate demand on the supply side the automobile industry is modelled as an oligopoly with product differentiation equilibrium is characterized by the first order conditions of the profit maximizing firms the estimation results are used in counterfactual simulations to investigate two trade policy issues the effects of the ver and exchange rate pass through

dynamic interaction between markets for leasing and selling automobiles we develop a model of dynamic interactions between price variations in leasing and selling markets for automobiles our framework assumes a differential game between multiple bertrand type competing firms which offer differentiated products to forward looking agents empirical analysis of our model using monthly us data from 2002 to 2011 shows that variations in selling cash market prices lead rapidly dissipating changes of leasing market prices in the opposite direction we discuss the practical implications of these results by augmenting a standard leasing valuation formula the additional terms represent the leased asset value changes that can be expected on the basis of past variations in automobile selling market prices

how can market mechanisms for forest environmental services help the poor preliminary lessons from latin america summary market mechanisms for forest environmental services are a new approach for conservation but there is also an increasing interest in the derived developmental benefits of these mechanisms we first propose a conceptual framework for future research on the livelihood impacts of environmental service markets we then review eight latin american case studies on carbon sequestration and watershed protection market initiatives finding positive local income effects in most cases more land tenure security and socioinstitutional strengthening in some cases but some negative effects also we recommend pro poor policy measures such as reducing smallholders transaction costs and removing inappropriate access restrictions

trends in unemployment duration data a method of estimating the distribution of uninterrupted unemploymentspells from aggregate unemployment data is outlined the methodology does not i mpose constant individual hazard rates and allows for heterogeneity characteris tics of the distribution of unemployment spells are then considered including ha zard rates measures of inequality such as gini coefficients and the fraction o f total unemployment associated with s weeks of unemploy ment the relationship between these char acteristics and labor demand variables gnp and supply side variables transfer payments unemployment insurance is considered in or der to better understand the relative role of short and long run unemployment copyright 1986 by mit press

environmental kuznets curves new evidence on both panel and country level co2 emissions using data on per capita co2 emissions and per capita real gdp from fifteen countries spanning the period 1960 2013 this paper tests the validity of the environmental kuznets curve ekc using both panel based and time series based methodological approaches of cointegration given that the ekc hypothesis postulates an inverted u shaped relationship between emissions and output the study tests for cointegration between per capita co2 emissions per capita real gdp and the squared values of per capita real gdp the evidence from panel cointegration methodologies is mixed this result might arise due to time dependence of cointegrating coefficients the time varying cointegration approaches provide strong evidence in favor of time varying cointegration parameters furthermore based on the quantile cointegration approach the results indicate that the ekc hypothesis holds in 12 out of the 15 countries however even for these three countries the ekc hypothesis seems to hold at certain quantiles

existence of stationary equilibrium in the markets for new and used durable goods abstract we prove the existence of stationary equilibrium in the primary and secondhand markets for an indivisible consumer durable in a general model with stochastic degradation and endogenous scrappage decisions unlike rust econometrica 53 1985 783 we introduce transaction costs in the model as a motivation for consumer holdings of durables across multiple quality levels our technique allows for both multiple types of durables e g porsche and bmw and relaxation of the single crossing condition on consumer tastes we provide a simple example showing how increasing transaction costs affect secondhand prices eventually for sufficiently costly transactions closing the secondhand market altogether

is demand for polluting goods manageable an econometric study of car ownership and use in mexico abstract our motivation for estimating a demand system for gasoline and cars is its strategic relevance to policy objectives such as pollution control if demand is responsive to pricing demand reductions for polluting goods will provide an important share of the pollution reductions otherwise cleaner technologies will have to do most of the job we estimate a model of gasoline demand and car ownership in mexico using a panel of annual observations by state key features that we introduce include instrumental variables on differenced data and the treatment of possible dynamics measurement errors in the data and unobserved individual state characteristics we use tests of serial correlation in the a residuals to model the dynamics properly the resulting demand system is quite responsive to pricing even in the short term 0 6 for the own price elasticity of gasoline but we emphasize a medium to long term perspective of 5 10 years as most relevant for policy five to ten year elasticity estimates are in the range of 1 25 to 1 13 applying these elasticity estimates to data on pollution control options for the vehicle fleet in mexico city the costs of reaching a target for pollution reductions would be 45 more expensive if one were not willing to use a demand management instrument such a gasoline tax in the control program

an economic analysis of scrappage this article examines the impact of policies aimed at encouraging the retirement of older high polluting vehicles such as the cash for clunkers policy endorsed by president george bush in 1992 the analysis assesses the likely benefits and costs of vehicle scrappage programs i also address the interaction of a scrappage program with other ongoing policies such as improved inspection and maintenance finally the simulation for los angeles suggests plausible design values for a scrappage program

signal facilitation a policy response to asymmetric information in cases of asymmetric information policymakers sometimes want to make informed agents share their private information one policy response to this situation is signal facilitation altering the environment to encourage signaling this article illustrates signal facilitation in the context of a competitive used car market sellers may determine quality and reveal it through warranties signal facilitation compares favorably to a policy of mandatory disclosure because car dealers can refuse to test and signal if the cost is excessive also this policy permits dealers to select less costly less revealing alternatives that may enhance social welfare copyright 1992 by university of chicago press

the environmental kuznets curve in the oecd 1870 2014 carbon dioxide co2 emissions play an important role in global warming consequently studying the relationship between co2 emissions and economic development is important especially when viewed from a historical perspective we test the environmental kuznets curve ekc hypothesis for a panel of 20 oecd nations dating back to the first globalization boom in the nineteenth century utilising recently developed panel data estimators that account for cross sectional dependence and parameter heterogeneity for the period 1870 to 2014 we find support for the ekc hypothesis for the panel as a whole with three of our preferred four estimators with turning points in income per capita that lie between 18 955 and 89 540 in 1990 us country specific results however only provide mixed support for the ekc hypothesis specifically we find evidence of an ekc for nine of the 20 countries with five exhibiting a traditional inverted u shaped relationship three exhibiting an n shaped relationship and one an inverted n shaped relationship

distributional and efficiency impacts of increased us gasoline taxes we examine the impacts of increased us gasoline taxes in a model that links the markets for new used and scrapped vehicles and recognizes the consider able heterogeneity among households and cars household choice parameters derive from an estimation procedure that integrates individual choices for car ownership and miles traveled we find that each cent per gallon increase in the price of gasoline reduces the equilibrium gasoline consumption by about 0 2

the measurement of labor force dynamics with longitudinal data the labour market activity survey filter this article explores the measurement of labor force dynamics using longitudinal data focusing in particular on the canadian labour market activity survey lmas which represents a potential advance in longitudinal data collection because it measures aspects of dynamics not available in existing panel data such as the panel study of income dynamics and the national longitudinal survey we examine the implications of the lmas questionnaire structure the lmas filter for the study of labor market dynamics and undertake simulations to provide a quantitative assessment of the importance of this filter for labor force spells and transitions between labor force states

confronting the environmental kuznets curve t he environmental kuznets curve posits an inverted u relationship between pollution and economic development kuznets s name was apparently attached to the curve by grossman and krueger 1993 who noted its resemblance to kuznets s inverted u relationship between income inequality and development in the first stage of industrialization pollution in the environmental kuznets curve world grows rapidly because people are more interested in jobs and income than clean air and water communities are too poor to pay for abatement and environmental regulation is correspondingly weak the balance shifts as income rises leading industrial sectors become cleaner people value the environment more highly and regulatory institutions become more effective along the curve pollution levels off in the middle income range and then falls toward pre industrial levels in wealthy societies the environmental kuznets curve model has elicited conflicting reactions from researchers and policymakers applied econometricians have generally accepted the basic tenets of the model and focused on measuring its parameters their regressions typically fitted to cross sectional observations across countries or regions suggest that air and water pollution increase with development until per capita income reaches a range of 5000 to 8000 when income rises beyond that level pollution starts to decline as shown in the conventional ekc line in figure 1 in developing countries some policymakers have interpreted such results as conveying a message about priorities grow first then clean up numerous critics have challenged the conventional environmental kuznets curve both as a representation of what actually happens in the development process and as a policy prescription some pessimistic critics argue that crosssectional evidence for the environmental kuznets curve is nothing more than a

some generalized mixture distributions with an application to unemployment duration compounding or mixture distributions provide a rich class of models for applications ranging from models of heterogeniety measurement error distribution of stock returns and income to models of unemployment duration some very general mixtures are considered which include many new mixture models and also provide a unified method of organizing and comparing previously considered models as well as a test of heterogeneity these models are used to analyze cps unemployment duration data a heterogeniety interpretation of the mixture models explains the discrepancy between implications of search theory and patterns observed in aggregate unemployment data copyright 1987 by mit press

the level and distribution of global household wealth the level of average household wealth in all countries is estimated via the determinants of assets and debts for 39 countries which have balance sheet or survey data the distribution of wealth in all countries is inferred from information on the pattern of wealth ownership for 20 countries covering 59 of world population combining the level and distribution figures suggests that median global wealth was ppp 8 635 in the year 2000 and that ppp 518 361 was needed to belong to the top percentile the top decile owned 71 of world wealth and the global gini value was 0 802

efficiency of second generation biofuel crop subsidy schemes spatial heterogeneity and policy design policy schemes that aim to stimulate the cultivation of biofuel crops typically ignore the spatial heterogeneity in costs and benefits associated with their production because of spatial heterogeneity in biophysical and current agricultural production factors potential gains from stimulating biofuel crops are non uniformly distributed across space this paper explores implications of this type of heterogeneity for the net benefits associated with different subsidy schemes we present a simple framework based on discounted cash flows to assess potential gains from introducing the notion of heterogeneity into stimulation schemes we show that agricultural subsidy spending can be reduced in a pareto efficient way and simultaneously improve the total stimulation potential of biofuel policies when schemes 1 are production based instead of land based 2 accommodate differences in opportunity costs and 3 target sites where subsidies for conventional agricultural land use types are high these results are robust for a range of different bioenergy prices and the relative gains of addressing these key elements in policy compared to conventional stimulation schemes increase with lower bioenergy prices and are largest when low prices coincide with high emission reduction ambitions

living in unemployment or who experiences a high unemployment burden the paper examines the distribution of unemployment experience in britain within the framework of the han and hausman semi parametric estimator which has the advantage of circumventing problems associated with individual heterogeneity arising from unobserved individual characteristics the results imply that the unemployment burden is unequally distributed among the working population males and females bear an unequal unemployment burden the study casts light on the characteristics of those individuals who are most likely to experience a high unemployment burden

the dynamics of job separation the case of federal employees summary in this paper we develop a model of workers quit decisions using panel data on a sample of us federal government employees we use maximum likelihood techniques to determine how much of the observed decline in quits with job tenure is a result of declining individual quit propensities state dependence rather than dynamic sample self selection heterogeneity the latter is found to be much more important than the former the effects of relative federal government wages and other variables on quits are also estimated the results are useful for analysing federal compensation policies

the co2 growth nexus revisited a nonparametric analysis for the g7 economies over nearly two centuries abstract using a long dataset and some recently popularized nonparametric econometric techniques this study revisits the nexus between economic growth and carbon dioxide co 2 emissions for the g7 countries over nearly two centuries the use of nonparametric modelling is warranted by the fact that long historical time series are often subject to structural breaks and other forms of nonlinearity over the course of time we employ nonparametric cointegration and causality tests along with the cross validated local linear regression analysis and validate the existence of the environmental kuznets curve in six of the g7 countries canada france germany italy u k and the u s and the only exception is japan our empirical analysis also finds co 2 emissions and economic growth to be cointegrated and closely interrelated in the granger sense our results are robust and highlight the nonlinear causal relationship between the two variables

determinants of participation in accelerated vehicle retirement programs one potential way to reduce hydrocarbon emission is through accelerated vehicle retirement programs however it is difficult to forecast participation rates in these programs because the number and characteristics of participants are likely to vary with the price offered to attract old cars this paper presents a theoretical model of the owner s car tenure and scrappage decision an econometric model of participation is then developed and estimated using data from a recent old vehicle scrap program in delaware participation rates at different possible offer prices are then predicted

efficient labor contracts with employment risk this article analyzes efficient employment agreements where the demand for consumption insurance can be satisfied by noncontractual means we assume that workers can save and that consumption is determined by a strong form of the permanent income hypothesis under conditions of asymmetric information about exogenous shocks to labor demand we derive a unique compensation schedule that efficiently guides decisions by both workers and employers efficient employment outcomes are generated without a need for third party enforcement or monitoring and workers choose a consumption policy that leaves them indifferent among realizations of labor demand within this solution it is both costless and efficient for workers to delegate employment decisions to the firm within the context of the model we analyze implications for the equilibrium distribution of wages and for empirical studies of labor supply

dynamics and equilibrium in a structural model of wide body commercial aircraft markets summary this paper develops and estimates a dynamic equilibrium model of the market for new and used commercial aircraft the model is estimated by maximum simulated likelihood using data on wide body aircraft owners and prices for transactions occurring 1978 1997 the importance of explicitly modeling dynamics and equilibrium in new and used markets for durable goods is illustrated in two counterfactual experiments estimates of the structural model are used to show that implementing an investment tax credit not only increases demand for new wide body aircraft by the airlines that receive the tax credit but also increases the number of new wide body aircraft owned by airlines not directly affected by the policy further the model indicates that a policy which improves the efficiency of secondary markets for used wide body aircraft will also stimulate demand for new wide body aircraft copyright 2010 john wiley sons ltd

economic growth and environmental degradation the environmental kuznets curve and sustainable development abstract in this paper we critically examine the concept of the environmental kuznets curve ekc it proposes that there is an inverted u shape relation between environmental degradation and income per capita so that eventually growth reduces the environmental impact of economic activity the concept is dependent on a model of the economy in which there is no feedback from the quality of the environment to production possibilities and in which trade has a neutral effect on environmental degradation the actual violation of these assumptions gives rise to fundamental problems in estimating the parameters of an ekc the paper identifies other econometric problems with estimates of the ekc and reviews a number of empirical studies the inference from some such ekc estimates that further development will reduce environmental degradation is dependent on the assumption that world per capita income is normally distributed when in fact median income is far below mean income we carry out simulations combining ekc estimates from the literature with world bank forecasts for economic growth for individual countries aggregating over countries to derive the global impact within the horizon of the bank s forecast 2025 global emissions of so 2 continue to increase forest loss stabilizes before the end of the period but tropical deforestation continues at a constant rate throughout the period

unemployment behaviour evidence from the cps work experience survey this chapter is empirical and descriptive rather than theoretical it examines the cps unemployment experience data which gives the number of weeks of unemployment and the number of spells of unemployment experienced by a sample of people in a year this chapter focuses on both the entry rate or frequency probability of entering and the exit rate or duration probability of exiting of unemployment spells for it is on both the entry and exit rates that the level and distribution of unemployment depends the conclusion is that entry rates and differences in entry rates across people are of primary importance in explaining unemployment experience

durable goods oligopoly with secondary markets the case of automobiles we study the effects of durability and secondary markets on equilibrium firm behavior in the car market we construct a dynamic oligopoly model of a differentiated product market to incorporate the equilibrium production dynamics that arise from the durability of the goods and their active trade in secondary markets we derive an econometric model and estimate its parameters using data from the automobile industry over a 20 year period our estimates are used to provide a measure of the competitive importance of the secondary market

estimating cannibalization rates for pioneering innovations to evaluate the success of a new product managers need to determine how much of its new demand is due to cannibalizing the firm s other products rather than drawing from competition or generating primary demand we introduce a time varying vector error correction model to decompose the base sales of a new product into its constituent sources the model allows managers to estimate cannibalization effects and calculate the new product s net demand which may be considerably less than its total demand we apply our methodology to the introduction of the lexus rx300 using detailed car transaction data this case is especially interesting because the lexus rx300 was the first crossover sport utility vehicle suv implying that its demand could come from both the luxury suv and the luxury sedan categories because lexus was active in both categories there was a double cannibalization potential we show how the contribution of the different demand sources varies over time and discuss the managerial implications for both the focal brand and its competitors

the environmental kuznets curve cointegration and nonlinearity this paper clarifies some conceptual shortcomings of the empirical environmental kuznets curve ekc literature that arise because of the hitherto inadequate application of unit root and cointegration techniques the literature to date has ignored the fact and a fortiori the consequences that powers of integrated processes are themselves not integrated processes the paper explains why standard methods should not be applied and discusses some recently proposed viable estimation and testing approaches for cointegrating polynomial regressions the application to co2 and so2 emissions data shows that using appropriate methods leads to strongly reduced evidence for a cointegrating ekc compared to typical but conceptually not sound findings

measuring regional diversification of environmental externalities in agriculture and the effectiveness of their reduction by eu agri environmental programs in poland abstract the problem of externalities is an important aspect of contemporary discussion about the directions of agricultural development and agricultural policy nonetheless measuring agri environmental externalities is a difficult task and rarely undertaken in scientific research in our research we have constructed a synthetic indicator that allows measuring agri environmental externalities at the regional level taking into account both positive and negative effects at the same time we also studied the extent to which our synthetic indicator can be used to inform about the effectiveness of subsidies paid to farmers in the european union under agri environmental programs in reduction of externalities generated by agriculture we concluded that the use of subsidies under agri environmental programs has a positive impact on reducing externalities generated by agricultural production measured by our indicator

estimation of unemployment duration from grouped data a comparative study economists have often found it useful to look at the average length of an unemployment spell in evaluating labor market conditions and in considering the labor market experience of the unemployed usually this statistic has to be estimated from grouped observations on interrupted incomplete unemployment spells this paper is a comparative study of some nonparametric and parametric methods of estimating this quantity using australian department of social security data on unemployment benefit recipients

keeping time an analysis of errors in the measurement of unemployment duration this study uses longitudinal microdata from the current population survey to examine the consistency with which unemployment duration is reported an estimate of measurement error is proposed and analyzed a significant negative relationship is found between the initial month s unemployment duration and the reported change between surveys on average persons who begin spells of unemployment in the second month report durations greater than the actual time elapsed overall the average duration of unemployment in this sample may be overstated by at least two weeks a brief discussion of some implications for empirical labor market research concludes the article

the incidence and duration of unemployment abstract census data from 1910 reveal the average non farm male worker faced higher probabilities of entering and leaving unemployment than in the 1970s long term occupational shifts explain a significant fraction of the decline in the entry hazard

new car sales and used car stocks a model of the automobile market this article develops a short run general equilibrium model of the automobile market by combining a discrete choice model of consumer automobile demand with simple models of new automobile production and used vehicle scrappage the theoretical model allows an unlimited degree of heterogeneity of both consumers and automobiles with equilibrium defined as aggregate demand equal to supply for every vehicle type econometric estimates of the scrappage and demand functions are then used to create a simulation model of the automobile market which is used to provide forecasts of automobile sales stocks and scrappage for the 1978 1990 period

disaggregate analysis of the demand for gasoline in this paper we adopt a disaggregate approach to modelling the components of gasoline demand gasoline demand in our model is viewed as the outcome of the fol lowing household decisions vehicle holdings number and type and vehicle usage non discretionary and discretionary usage modelling gasoline demand in this way correctly specifies gasoline as an input into the production of transportation services and allows for the interdependence between household decisions on vehicle holdings and usage moreover estimation of the components of gasoline demand allows policy makers to identify the means by which individuals will respond to policy changes this leads to more effective policies designed to reduce gasoline consumption we use this model to estimate price and fuel efficiency elasticities of vehicle usage and gasoline demand

new evidence on whether unemployment and out of the labor force are distinct states this paper focuses on the question of whether people who are out of the labor force olf should be included in unemployment measures if people who are olf can obtain jobs as often as the people who are unemployed then there is no real distinction between the two states of nonemployment surprisingly there has been very little effort surrounding this issue in the past clark and summers 1982 conclude that for teenagers unemployment and olf are not distinct states while flinn and heckman 1982a find the opposite for white male high school graduates the methodology adopted in this paper enables one to use incomplete transition data on unemployment and olf and to obtain estimates of the full transition matrix between three labor force states that are not possible with standard methods new evidence for high school graduates is presented by gender and it is found that while for young women the two states are distinct for young men they are not

business cycles and compositional variation in u s unemployment in this article we study u s unemployment dynamics using grouped unemployment data from the current population survey over the period 1968 1992 we estimate a model that traces variation in these unemployment data both over time and between demographic groups back to the underlying variation in the inflow and the outflow in turn we model the outflow as a transition process in which we allow the exit probabilities to depend on calendar time duration and demographic group we use the estimation results to provide a decomposition of aggregate u s unemployment dynamics in various incidence and duration components

economic growth energy and environmental kuznets curve the aim of this study is to investigate the relationship between income and carbon dioxide co2 emissions in the context of the environmental kuznets curve ekc which posits the existence of an inverted u shape relationship between environmental degradation and economic development for this purpose two empirical models are examined for both models the relationship between per capita income and per capita co2 emissions and the relationship among per capita income per capita energy use and per capita co2 emissions are analyzed respectively between 1980 and 2010 using the panel data estimation techniques with the application of driscoll kraay standard errors yet for the first model data are analyzed for 26 oecd countries with high income levels while for the second model data are examined for 52 emerging countries the results of both models show that n shape and an inverted n shape relationship for cubic functional form are observed thus the results do not support the ekc hypothesis which implies that environmental degradation cannot be solved automatically by economic growth

duration dependence targeted employment subsidies and unemployment benefits abstract this paper is concerned with the economic justification of targeted employment training subsidies it deals with the question is the policy of providing training subsidies to employers to hire from a target group of long term unemployment benefit recipients preferable to that of providing unemployment benefits alone in the sense that it can yield a cost reduction if so what are the optimal durations of waiting period for enrolment into the training program and the period of subsidy the answer is shown to depend upon inter alia four effects the disincentive effect on job search of the target group substitution between subsidised and nonsubsidised workers negative duration dependence and the effectiveness of training the existence of the first two reduces the potential net benefit of the subsidy whereas that of the last two increases it analytically the problem is complex so a numerical simulation is conducted to provide insights into the interactions between these effects the nature of duration dependence is shown to be of crucial importance

employer size and labor turnover the role of pensions the well documented lower labor turnover in large firms than in smaller firms has been cited as evidence that large firms pay workers above their opportunity wage this study investigates whether t

asset prices and public information abstract this paper examines the impact of public quality information on the structure of equilibrium prices in a consumer durables market we model the link between prices and an observable quality index on the basis of the user cost approach using cross section data of the west german automobile market we show that the hypothesis of information efficiency cannot be rejected

new or used investment with credit constraints abstract used capital is cheap up front but requires higher maintenance payments later on we argue that the timing of these investment cash outflows makes used capital attractive to financially constrained firms since it is cheap when evaluated using their discount factor in contrast it may be expensive from the vantage point of an unconstrained agent we provide an overlapping generations model and determine the price of used capital in equilibrium agents with less internal funds are more credit constrained invest in used capital and start smaller firms empirically we find that the fraction of investment in used capital is substantially higher for small firms and varies significantly with measures of financial constraints

environmental productivity and kuznets curve in india abstract as a result of india s extremely rapid economic growth the scale and seriousness of environmental problems are no longer in doubt whether pollution abatement technologies are utilized more efficiently is crucial in the analysis of environmental management because it influences the cost of alternative production and pollution abatement technologies in this study we use state level industry data of sulfur dioxide nitrogen dioxide and suspended particular matter over the period 1991 2003 employing recently developed productivity measurement technique we show that overall environmental productivities decrease over time in india furthermore we analyze the determinants of environmental productivities and find environmental kuznets curve type relationship existences between environmental productivity and income panel analysis results show that the scale effect dominates over the technique effect therefore a combined effect of income on environmental productivity is negative

exploring the relationship between the markets for new and used durable goods the case of automobiles given that durable products are long lived there exists the possibility of secondary markets for used products as well as the potential for product obsolescence this is an important issue in markets where technology changes rapidly because the introduction of new versions of a product can make earlier versions obsolete more generally prices of older versions in the secondary market adjust in response to changes incorporated in new versions of the product thus another method of evaluating consumers response to a new product is by looking at the variation in market prices of the old product this paper develops a general model to explore the relationship between primary markets for new cars and secondary markets for used cars the results suggest that the depreciation of used cars is influenced strongly by the types of changes in new model cars

the environmental kuznets curve does one size fit all abstract this paper uses a new panel data set on state level sulfur dioxide and nitrogen oxide emissions from 1929 1994 to test the appropriateness of the one size fits all reduced form regression approach commonly used in the environmental kuznets curve literature empirical results provide initial evidence that an inverted u shape characterizes the relationship between per capita emissions and per capita incomes at the state level parameter estimates suggest however that previous studies which restrict cross sections to undergo identical experiences over time may be presenting statistically biased results

is there an environmental kuznets curve for sulfur abstract most existing estimates of the environmental kuznets curve ekc for sulfur which use samples of mainly high income countries indicate a maximum emissions turning point at middle to lower high income levels of gdp per capita we use a larger and more globally representative sample than previous sulfur ekc studies we find that sulfur emissions per capita are a monotonic function of income per capita when we use a global sample and an inverted u shape function of income when we use a sample of high income countries a model estimated in first differences results in a monotonic ekc when estimated with both high income and global samples reductions in emissions are time related rather than income related

a presumptive pigovian tax complementing regulation to mimic an emissions fee if regulations are used to make cars and fuels cleaner should gasoline taxes be used to manage demand for trips that pollute anaysis of a well composed program for mexico city indicates that the emission reductions would cost 24 percent more if a tax on gasoline was not introduced a simple analytical framework is developed to analyze the use of abatement requirements to make cars cleaner and a gasoline tax to economize on the use of cars the two instruments should be combined to mimic the incentives that would have beeen provided by an emissions fee thus cleaner cars and fewer trips are analogous to competing suppliers of emission reductions the planner should buy from both so that marginal costs are equal applying that rule the marginal cost of emission reductions is simply the gasoline tax rate divided by emissions per liter

revisiting the relation between economic growth and the environment a global assessment of deforestation pollution and carbon emission abstract the un s sustainable development goals for 2030 aim on one hand at inclusive growth and eradicating poverty and on the other at preserving environments the relation between development and the environment has been studied extensively since the 1990s documenting inverted u shaped relations between per capita income and indicators of environmental degradation this paper revisits the issue with machine learning techniques and novel disaggregate data to model these relationships heterogeneously across economic indicators results suggest that development gradually improves the efficiency of consuming the earth s nonrenewable resources but increased efficiency alone is not sufficient to offset growth in scale development shifts reliance on one nonrenewable source to another and on average we find successive inverted u shapes in deforestation air pollution and carbon intensities followed by a j shape in per capita carbon output local economic circumstances further determine the shape amplitude and location of tipping points in environmental output the general implications of the estimated dynamics are explored by extrapolating environmental output to 2030 under simplistic scenario s the results are a reminder that immediate and sustained global efforts are required to preserve our environment

reconstructing the pattern of american unemployment before the first world war this paper calculates the distribution of unemployment duration lengths and transition rates for massachusetts workers in the late nineteenth century using data on time spent out of work and assuming that the spell durations followed a weibull distribution i parameterize a model of the timing of transitions from unemployment to employment and vice versa i then simulate the employment experience of representative workers and construct distributionis of completed spell lengths the experience of most out of work workers in a year seems to have been in one rather long spell rather than in shorter multiple ones

distributional effects of alternative vehicle pollution control policies abstract previous work shows that policies that subsidize new vehicles and tax size miles or gasoline efficiently reduce pollution less is known about their distributional effects this paper examines distributional effects by estimating the joint demand for vehicles and miles using the consumer expenditure survey greater price responsiveness among low income households enhances progressivity of gas or miles taxes across lower incomes and mitigates regressivity across upper incomes taxes on engine size or subsidies to new vehicles are significantly more regressive than gas or miles taxes