wheat from chaff meta analysis as quantitative literature review abstract this paper presents and develops a quantitative method of literature reviewing and evaluating empirical research meta regression analysis or mra economics is theory driven yet we must learn empirically if economics is to advance mra offers a more objective statistical method to summarize our empirical knowledge and to explain the wide study to study variation in economic research mra is used to assess the evidence for ricardian equivalence and its findings are contrasted to those of conventional narrative review furthermore mra establishes a platform from which to distinguish genuine empirical effect from the exploitable specification error that infests applied econometrics

the role of benefit transfer in ecosystem service valuation the demand for timely monetary estimates of the economic value of nonmarket ecosystem goods and services has steadily increased over the last few decades this article describes the use of benefit transfer to generate monetary value estimates of ecosystem services specifically the article provides guidance for conducting such benefit transfers and summarizes advancements in benefit transfer methods databases and analysis tools designed to facilitate its application

the market value of reducing cancer risk hedonic housing prices with changing information 1 introduction market evidence on the value of a statistical life invariably consists of cross sectional evidence on risks and prices or wages at a point in time if information about the level of risk changes over time and people incorporate this information in a rational manner there will be a corresponding price response on the basis of these temporal changes one can estimate the market price risk tradeoff eliminating many confounding time invariant effects that cannot be controlled for using cross sectional data this paper examines the market response to the release of government information about the level of risk at hazardous waste sites and provides insight into the rationality of this response studies based on experimental evidence and survey data often find that individual beliefs may deviate from objective risk levels 1 people often overestimate highly publicized risks and mortality risks in the case of hazardous waste risks bias in risk beliefs often leads to considerable public reaction and pressure for site cleanups which may be an inefficient outcome by using market data one can examine whether this intense public reaction carries over to contexts in which private money is at stake government agencies frequently use information provision as a regulatory device particularly since the advent of the right to know movement of the 1980s examples of information provision efforts include the food and drug administration s requirement that many prescription drugs indude information inserts the department of housing and urban development s requirement that sellers of houses built before 1950 inform buyers about the presence of lead based paints and the environmental protection agency s epa requirement that manufacturing facilities report their annual releases of chemicals above a threshold amount for a list of over 600 substances such regulations imply a belief that citizens can learn from information about risk and rationally adjust their prior beliefs towards the objective risk level in light of the information this article provides market evidence to bolster the results of some survey studies of information transfer that suggest that individuals revise their risk beliefs in response to new information 2 the u s federal policy dealing with hazardous waste sites is known as the superfund program the most hazardous sites are targeted for cleanup and placed on a government priority roster called the national priorities list npl extension of the classic theory of compensating differentials to the housing market implies that environmental disamenities such as hazardous waste sites will reduce housing prices rosen 1974 the negative impact of hazardous waste sites on the housing prices of nearby residences is well documented for example in a previous study gayer hamilton and viscusi 2000 we used an analysis that focused on the sale of 16 928 houses from 1988 to 1993 that surround superfund sites in greater grand rapids michigan we found that before the epa released its risk report a reduction in the cancer risk from neighborhood superfund sites by the mean level of risk would increase the average value of a house by 238 in 1996 dollars 3 to estimate this willingness of residents to pay to avoid cancer risks before the release of the epa s risk report we assumed that residents prior beliefs were equal to the objectively measured risks suggested by the report thus this analysis was based on the very strong informational assumption that residents could in effect predict the results of the epa s site specific risk assessments before the release of the report the price risk tradeoff implied a value of a statistical cancer case of 51 million once the epa released its risk information the implied value of a statistical cancer case was 4 million these results suggest that after the release of the epa s risk report revealed preferences for avoiding superfund risks were consistent with surveys of the value of a statistical life in the labor market

wealth accumulation over the life cycle and precautionary savings this article constructs and simulates a life cycle model of wealth accumulation and estimates the parameters of the utility function the rate of time preference and the coefficient of risk aversion by matching the simulated median wealth profiles with those observed in the panel study of income dynamics and in the survey of consumer finances the estimates imply a low degree of patience and a high degree of risk aversion the results are used to study the importance of precautionary savings in explaining wealth accumulation they imply that wealth accumulation is driven mostly by precautionary motives at the beginning of the life cycle whereas savings for retirement purposes become significant only closer to retirement

private values of risk tradeoffs at superfund sites housing market evidence on learning about risk this paper incorporates a bayesian learning model into a hedonic framework to estimate the value that residents place on avoiding cancer risks from hazardous waste sites we show that residents are

heterogeneous impact of soil contamination on farmland prices in the belgian campine region evidence from unconditional quantile regressions we estimate a hedonic pricing model using geo coded farmland transaction data from the campine region situated in the north east of belgium unlike previous hedonic studies we use the method of unconditional quantile regression firpo et al in econometrica 77 3 953 973 2009 an important advantage of this new method over the traditional conditional quantile regression koenker and bassett in econometrica 46 1 33 50 1978 is that it allows for the estimation of potentially heterogeneous effects of cadmium pollution along the entire unconditional distribution of farmland prices using a threshold specification of the hedonic pricing model we find evidence of a u shaped valuation pattern where cadmium pollution of the soil has a negative and significant impact on prices only in the middle range of the distribution insofar as cadmium concentrations are above the regulatory standard of 2 parts per million for agricultural land results obtained from a probit model to classify land plots into different price segments further suggest that the heterogeneous impact of soil pollution on price can be directly related to the variety of amenities that farmland provides

what have we learned since hotelling s letter a meta analysis abstract this paper reports the results of a meta analysis of the estimates of the price elasticity of demand for recreation sites using the travel cost method by using econometric methods to summarize empirical literature meta analysis assists in identifying research conclusions despite the non experimental nature of most empirical research in economics in this application the results suggest that modeling decisions based on theory as well as those relying on fitting criteria were important influences to the estimated price elasticities across studies

the use and abuse of meta analysis in environmental and natural resource economics an assessment motivated by the 2006 report of a work group appointed by the environmental protection agency epa this paper examines the present state of meta analysis in environmental economics and offers recommendations for its future use to this end we summarize and assess 140 meta analyses from 125 published and unpublished studies covering 17 topical categories in environmental and resource economics first we provide several generic meta analysis models as reference points and discuss major estimation issues five econometric issues are identified as part of a complete analysis 1 sample selection criteria 2 basic data summary 3 primary data heterogeneity 4 heteroskedasticity and 5 non independence of multiple observations from primary studies second a tabular summary is presented for the 140 meta analyses with respect to estimation methods third a narrative summary is presented for 19 meta analyses including the three value of statistical life studies examined by the epa work group and one analysis from each of 16 other categories fourth we offer a set of best practice guidelines for future meta analyses in this and other areas of economics last the paper comments on the use of meta analytic methods for benefit transfers of environmental values

job exit behavior of older men a dynamic programming model of job exit behavior and retirement is constructed and estimated using the method of simulated moments the model and estimation method allow for both unobserved individual effects and unobserved job specific match effects the model is estimated using two different assumptions about individual discount factors first a static model with the discount factor equal to zero is estimated then a dynamic model with the discount factor equal to 95 is estimated in both models it is found that bad health age and lack of education increase the probability of retirement the dynamic model performs better than the static model and has different implications for retirement behavior the job specific effects are an important source of unobserved heterogeneity copyright 1991 by the econometric society

beyond implicit prices recovering theoretically consistent and transferable values for noise avoidance from a hedonic property price model using a two stage hedonic pricing methodology we estimate a system of structural demand equations for different sources of transport related noise in the first stage we identify market segments using model based clustering techniques and estimate separate hedonic price functions hpfs for each segment in so doing we show how a semiparametric spatial smoothing estimator outperforms other standard specifications of the hpf in the second stage we control for non linearity of the budget constraint and identify demand relationships using techniques that account for problems of endogeneity and censoring of the dependent variable our estimated demand functions provide welfare estimates for peace and quiet that we believe to be the first derived from property market data in a theoretically consistent manner

comment sequential moment restrictions in panel data 1992 comment sequential moment restrictions in panel data journal of business economic statistics vol 10 no 1 pp 20 26

bridge jobs and partial retirement the job stopping process of older workers often includes some combination of postcareer bridge employment partial retirement and reverse retirement fewer than two fifths of household heads retire directly from career jobs over half partially retire at some point in their working lives and a quarter reenter the labor force after initially retiring in addition postcareer employment is frequently located outside the industry and occupation of the career job and there are important differences in postcareer labor force experiences by gender permanent income and career job pension status

is meta analysis a noah s ark for non market valuation this paper describes meta analytical methods as they have been applied to non market valuation research these studies have been used to review and synthesize literature and more recently in benefit transfer this second use imposes a higher standard on the consistency in economic concepts being summarized and in the resources included in a meta analysis to meet this need the paper proposes and illustrates a structural framework using a generalized method of moments estimator to estimate the parameters of a preference function with the benefits estimates usually encountered in meta analytic summaries

wealth inequality and intergenerational links previous work has had difficulty generating household saving behaviour that makes the distribution of wealth much more concentrated than that of labour earnings and that makes the richest households hold onto large amounts of wealth even during very old age i construct a quantitative general equilibrium overlapping generations model in which parents and children are linked by accidental and voluntary bequests and by earnings ability i show that voluntary bequests can explain the emergence of large estates while accidental bequests alone cannot and that adding earnings persistence within families increases wealth concentration even more i also show that the introduction of a bequest motive generates lifetime savings profiles more consistent with the data

uncertain medical expenses and precautionary saving near the end of the life cycle this paper introduces a dynamic structural model of household consumption decisions in which elderly families consider the effects of uncertain future medical expenses when deciding current levels of consumption the model with uncertain medical expenses implies a potentially important role for precautionary saving incentives to explain slow rates of dissaving among elderly americans during retirement rather than just simulating the stochastic dynamic model preference parameters are estimated using panel data on health wealth and expenditures for retired families the health uncertainty model predicts consumption levels closer to observed expenditures than a life cycle model with uncertain longevity however elderly families typically dissave their financial assets more slowly than even the baseline health uncertainty model predicts is optimal

health insurance and retirement of married couples summary most health insurance in the usa is provided by employers until eligibility for public health insurance medicare begins at age 65 retiring before 65 exposes workers who lack retiree health insurance coverage to the risk of catastrophic medical expenditure we solve and estimate a dynamic model of the employment behavior of older married couples that includes risky medical expenditure and health insurance parameter estimates imply that the risk reducing feature of health insurance can account for about half of the observed association between retiree health insurance and employment for married men but can account for only one tenth of the much larger observed association for married women policy simulations imply very small effects on employment of changing the age of eligibility for medicare from 65 to 67 copyright 2006 john wiley sons ltd

directional heterogeneity in distance profiles in hedonic property value models abstract in environmental economics hedonic property value hpv models have often employed distance from a localized environmental disamenity as a proxy for perceived risk the magnitude of a distance effect on housing prices however may depend upon the direction in which it is being measured we generalize conventional distance models to allow for continuously varying directional effects by converting from cartesian to polar coordinates a simple empirical example for housing prices around woburn massachusetts between 1988 and 1996 illustrates how failure to allow for directional heterogeneity can obscure otherwise statistically significant distance effects in hpv

contamination and incomplete information bounding implicit prices using high profile leaks incomplete information can lead households to underprice environmental disamenities in the housing market to bound true implicit prices researchers sometimes turn to high profile cases involving significant media and community attention however prior research also finds that high profile cases can lead to stigma effects that may confound interpretation of implicit prices this study compares these opposing effects at the highest profile underground storage tank releases across the united states over the last thirty years we utilize covariate matching and estimate difference in differences hedonic regressions at each site and then conduct a cross site meta analysis to estimate the average treatment effects we find an average housing price depreciation of 2 to 6 upon discovery of a release which is an upper bound on the implicit price of contamination at more typical sites following cleanup we find a housing price appreciation of a similar magnitude suggesting that even in high profile cases surrounding neighborhoods do not experience persistent stigma

undesirable facilities and property values a summary of empirical studies abstract undesirable land uses are expected to impose health or amenity risks on surrounding communities these risks are expected to be translated economically into negative effects on adjacent property values these negative effects may be present even when such uses possess offsetting advantages of proximity such as employment opportunities the purpose of this study is to summarize empirical studies completed to date that test whether undesirable land uses have observable negative effects on adjacent property values this information may be useful in assessing minimum valuations of terminating undesirable land uses such as clean up of hazardous sites or compensation necessary to ameliorate the economic impacts of new undesirable uses

can stigma explain large property value losses the psychology and economics of superfund this research documents the long term impacts of delayed cleanup on property values in communities neighboring prominent superfund sites the research examines the sale prices of nearly 34 000 homes near sites in three metropolitan areas for up to a 30 year period to our knowledge no other property value studies have examined sites in multiple areas with large property value losses over the length of time used here the results are both surprising and inconsistent with most prior work the principal result is that when cleanup is delayed for 10 15 and even up to 20 years the discounted present value of the cleanup is mostly lost a possible explanation for these property value losses is that the sites are stigmatized and the homes in the surrounding communities are shunned the results suggest that expedited cleanup and minimizing the number of stigmatizing events would reduce these losses

valuation of expectations a hedonic study of shale gas development and new york s moratorium abstract this paper examines the local impacts of shale gas development sgd we use a hedonic framework and exploit a discrete change in expectations about sgd caused by the new york state moratorium on hydraulic fracturing our research design combines difference in differences and border discontinuity as well as underlying shale geology on properties in pennsylvania and new york results suggest that new york properties that were most likely to experience both the financial benefits and environmental consequences of sgd dropped in value 23 as a result of the moratorium which under certain assumptions indicates a large and positive net valuation of sgd

value of recreational fishing in the brazilian pantanal a travel cost analysis using count data models abstract recreational fishing value of the brazilian pantanal is measured using travel cost method tcm we compare non linear poisson and negative binomial count data models to estimate recreational fishing trip demands the count data and truncated models are used primarily to account for non negative integer and truncation properties of recreational fishing trips as suggested by the recreation valuation literature the results reveal that non linear and truncated count data models perform relatively well in our study the economic values of recreational fishing in terms of consumer surplus cs are derived using non linear and truncated models we estimate the cs values from 540 54 to 869 57 per trip resulting in the total social welfare estimate range from 35 to 56 million the study demonstrates a relatively high value of recreational fishing in the pantanal in comparison to similar studies conducted in other parts of the world the findings of this study would be important for resource management decisions in the pantanal and could serve as a reference in valuing similar resources in other ecosystems around the world

the effect of access to post retirement health insurance on the decision to retire early the authors analyze the effect of the availability of post retirement health insurance on early retirement behavior of men using data from the 1984 1986 and 1988 panels of the survey of income and program participation sipp they extend previous static models of retirement to account for access to health insurance as a factor in the retirement decision the estimates from probit models of retirement during the sipp panel period show that the offer of continued employer provided health insurance coverage after retirement increased the likelihood of retirement before age 65 also the authors find evidence that the presence before retirement of retirement insurance coverage through a source in addition to the employer increased the likelihood of early retirement

use renewables to be cleaner meta analysis of the renewable energy consumption economic growth nexus abstract the renewable energy consumption economic growth nexus is a growing area of research over the last few years emanating to mixed results the aim of the current study is to quantitatively synthesise the empirical literature on the subject using the meta analysis approach in particular a meta multinomial regression is employed to investigate the sources of variation in the direction of causality between renewable energy consumption and economic growth this causal relationship takes the form of four hypotheses namely the feedback conservation growth and neutrality hypotheses to the best of author s knowledge this study constitutes the first meta analysis undertaken on the renewable energy consumption economic growth nexus the empirical results reveal that the variation in the supported hypotheses is due to a number of characteristics including model specification data characteristics estimation techniques cointegration methods and causality tests and development level of the country on which a study was conducted

social security liquidity and early retirement abstract this paper investigates the effect of social security on retirement decisions it argues that it is important to take realistic account of how recipients evaluate potential benefit flows the paper presents a simple retirement model in which liquidity constraints prompt individuals to use higher than market discount rates in evaluating future pension benefits as a consequence even an apparently actuarially fair early retirement benefit could on average discourage continued work using data on individual retirement decisions i find support for the argument that this phenomenon contributes to some of the observed increase in early retirement

the effects of health insurance and self insurance on retirement behavior this paper provides an empirical analysis of the effects of employer provided health insurance medicare and social security on retirement behavior using data from the health and retirement study we estimate a dynamic programming model of retirement that accounts for both saving and uncertain medical expenses our results suggest that medicare is important for understanding retirement behavior and that uncertainty and saving are both important for understanding the labor supply responses to medicare half the value placed by a typical worker on his employer provided health insurance is the value of reduced medical expense risk raising the medicare eligibility age from 65 to 67 leads individuals to work an additional 0 074 years over ages 60 69 in comparison eliminating 2 years worth of social security benefits increases years of work by 0 076 years

labor force dynamics of older men this paper describes and analyzes movements of older men among labor force states in the united states using quarterly observations derived from the retirement history survey rhs the results indicate substantial undercounts in the biannual data indicating that the prevalence of labor force movements at older ages has been underestimated previously the results show that labor force dynamics at older ages are important including duration and spell occurrence dependence and work experience effects these effects are robust to nonparametric controls for unobserved heterogeneity the estimates indicate that social security benefits have strong effects on the timing of labor force transitions at older ages but that changes in social security benefit levels over time have not contributed much to the trend toward earlier labor force exit excerpt

environmental value transfer state of the art and future prospects abstract the main objectives of the paper are to 1 give an overview of the state of the art of environmental value transfer 2 discuss its prospects and potential role in cba as a decision support tool and 3 provide further guidelines for proper use and application environmental value or benefit transfer is a technique in which the results of studies on monetary environmental valuation are applied to new policy contexts the technique is controversial not least because of academic and political reservations over the usefulness and technical feasibility of economic valuation tools to demonstrate the importance of environmental values in project or programme appraisals testing of environmental value transfer so far has been unable to validate the practice taking into account the conditions set out in the literature for valid and reliable value transfer most transfers appear to result in substantial transfer errors this paper discusses why and addresses the question of which factors may have been overlooked it is argued that the problem is much more fundamental than previously acknowledged strict guidelines in terms of quantitative adjustment mechanisms to valid value transfer are meaningless if the more fundamental issue of differences in the very nature of the values elicited is not addressed at the same time

the effect of part time work on wages evidence from the social security rules this article identifies the part time wage effect using hours variation caused by the social security rules we show that work hours and wages drop sharply at ages 62 and 65 we argue that the hours decline causes the wage decline resulting in a 25 wage penalty for men who cut their work week from 40 to 20 hours however we find little evidence for such an effect among women we also show that models that fail to account for the joint determination of hours and wages will understate the labor supply response to a tax change by about 26

stigmatized asset value is it temporary or long term stigma is a negative attribute of real estate acquired by environmental contamination and reflected in its value elliot jones 1996 using a model of neighborhood turnover with external economies we show that both temporary stigma and long term stigma are possible equilibrium outcomes after the discovery and cleanup of a hazardous waste site the existence and duration of stigma are examined using hedonic price techniques with data from housing sales prices in dallas county texas we find that results depend critically on distance from the hazardous waste site neighborhood turnover due to changes in the level of poverty also appears likely

economic valuation of biodiversity a comparative study abstract in recent years an intensive debate on the economic valuation of biodiversity has entered the environmental economics literature the present paper seeks to offer first a critical review of key concepts that are essential for a proper understanding of such evaluation issues particular attention is given here to various monetary valuation approaches and to comparative i e meta analytical methods from the perspective of conservation and sustainable use of biodiversity several illustrative examples are presented in order to highlight the usefulness of the various approaches discussed next an attempt is made to infer general findings and lessons from past applied research by means of meta analysis in this context a multi dimensional technique originating from the field of artificial intelligence is deployed it allows us to identify the most important variables responsible for changes in economic estimates of biodiversity

does the measurement of environmental quality affect implicit prices estimated from hedonic models hedonic property value models are often used to derive point estimates for identifying the relationship between environmental quality and property prices the measurement of the environmental quality variable is often selected based on convenience but variables reflecting different perceptions about environmental quality may result in implicit prices that vary substantially this case study derives implicit prices for nine measures of water clarity using hedonic property value models of lakefront properties in maine results show that water clarity variables based on different perceptions may result in differences in implicit prices large enough to potentially affect policy decisions

the validity of environmental benefits transfer further empirical testing this paper provides further empirical evidence of the validity of environmental benefits transfer based on cv studies by expanding the analysis to include control factors which have not been accounted for in previous studies these factors refer to differences in respondent attitudes traditional population characteristics were taken into account but these variables do not explain why respondents from the same socio economic group may still hold different beliefs norms or values and hence have different attitudes and consequently state different wtp amounts the test results are mixed the function transfer approach is valid in one case but is rejected in the 3 other cases investigated in this paper we provide further evidence that in the case of statistically valid benefits transfer the function approach results in a more robust benefits transfer than the unit value approach we also show that the equality of coefficient estimates is a necessary but insufficient condition for valid benefit function transfer and discuss the implications for previous and future validity testing

the effects of health wealth and wages on labour supply and retirement behaviour this paper estimates a life cycle model of labour supply retirement and savings behaviour in which future health status and wages are uncertain individuals face a fixed cost of work and cannot borrow against future labour pension or social security income the method of simulated moments is used to match the life cycle profiles of labour force participation hours worked and assets that are estimated from the data to those that are generated by the model the model establishes that the tax structure of the social security system and pensions are key determinants of the high observed job exit rates at ages 62 and 65 removing the tax wedge embedded in the social security earnings test for individuals aged 65 and older would delay job exit by almost one year by contrast social security benefit levels health and borrowing constraints are less important determinants of job exit at older ages for example reducing social security benefits by 20 would cause workers to delay exit from the labour force by only three months

the spatial extent of water quality benefits in urban housing markets water quality regulation continues to be controversial as demonstrated by recent litigation between the u s environmental protection agency and the state of florida over nutrient standards while the costs of standards are usually known benefits may be diverse and difficult to identify this study investigates the effects of enhanced water quality on both waterfront and nonwaterfront property prices using hedonic models within an urban market findings indicate 1 the value of increased water quality depends upon the property s location and proximity to waterfront and the surface area of the water body and 2 aggregate benefits to nonwaterfront homes may dominate those realized by waterfront homeowners

a simple test of consumption insurance are consumers effectively insured against idiosyncratic shocks to income or wealth either by formal institutions such as charities private insurance and government programs or by informal mechanisms such as gifts and loans from relatives friends and neighbors under full insurance consumption growth should be cross sectionally independent of idiosyncratic variables that are exogenous to consumers this proposition is tested by cross sectional regressions of consumption growth on a variety of exogenous variables full insurance is rejected for long illness and involuntary job loss but not for spells of unemployment loss of work due to strike and an involuntary move

evidence of the effects of water quality on residential land prices we use hedonic techniques to show that water quality has a significant effect on property values along the chesapeake bay we calculate the potential benefits from an illustrative but limited water quality improvement and we calculate an upper bound to the benefits from a more widespread improvement many environmental hedonic studies have almost entirely ignored the potential for omitted variables bias the possibility that pollution sources in addition to emitting undesirable substances are likely to be unpleasant neighbors we discuss the implications of this oversight and we provide an application that addresses this potential problem o 2000 acadcmic prcss

meta analysis of empirical evidence on energy poverty the case of developing economies abstract energy poverty has evolved as an important issue of research from academic and policy perspectives during the last two decades the energy poverty estimates exhibit widespread variations across regions methodologies and datasets making the task of energy and development policies challenging the variations in energy poverty estimates necessitate a systematic and rigorous analysis of these empirical studies to obtain a true measure of energy poverty the present study conducts a meta analysis of 30 studies and 103 estimates of energy poverty on average 71 1 percent of the population in the overall sample studies has been identified as energy poor high i square statistic values suggest heterogeneity bias in the sample studies therefore analysis at the subgroup level has been conducted meta regression analysis of overall sample and subgroups has identified type of methodology citations impact factor of the journal regional dummies average key crude oil price and gross domestic product as significant factors that explain heterogeneity in the energy poverty effect sizes we recommend inclusion of local and regional factors in assessment of energy poverty for developing a uniform methodology to assess energy poverty across developing economies

how social security and medicare affect retirement behavior in a world of incomplete markets this paper provides an empirical analysis of how the u s social security and medicare insurance system affect the labor supply of older males in the presence of incomplete markets for loans annuities and health insurance we estimate a detailed dynamic programming dp model of the joint labor supply and social security acceptance decision focusing on a sample of males in the low to middle income brackets whose only pension is social security the dp model delivers a rich set of predictions about the dynamics of retirement behavior and comparisons of actual vs predicted behavior show that the dp model is able to account for wide variety of phenomena observed in the data including the pronounced peaks in the distribution of retirement ages at 62 and 65 the ages of early and normal eligibility for social security benefits respectively we identify a significant fraction of health insurance constrained individuals who have no form of retiree health insurance other than medicare and who can only obtain fairly priced private health insurance via their employer s group health plan the combination of significant individual risk aversion and a long tailed pareto distribution of health care expenditures implies that there is a significant security value for these individuals to remain employed until they are eligible for medicare coverage at age 65 overall our model suggests that a number of heretofore puzzling aspects of retirement behavior can be viewed as artifacts of particular details of the social security rules whose incentive effects are especially strong for lower income individuals and those who do not have access to fairly priced loans annuities and health insurance

measurement error and earnings dynamics some estimates from the psid validation study previous empirical work on measurement error in survey earnings data has shown that the variance of the measurement error is roughly constant over time it is negatively correlated with true earnings and it is autocorrelated with previous measurement errors this article proposes a simple model in which the measurement error stems from underreporting of transitory earnings fluctuations and a white noise component the model fits well to data from the panel study of income dynamics validation study the results imply that autocorrelations in the changes of earnings can be estimated relatively accurately despite the presence of measurement error

what do property values really tell us a hedonic study of underground storage tanks hedonic property value models are widely used but are susceptible to potentially invalid conjectures based on the assumed measure of environmental quality this paper focuses on an application where this is of particular concern leaking underground storage tanks i estimate a hedonic model using quasi experimental and spatial econometric techniques similar to previous studies i examine how house prices vary with distance to the disamenity this approach yields little evidence that prices are adversely impacted however to better measure risks i utilize home specific data on groundwater well tests and correspondence from regulators and find an 11 depreciation when households are well informed