sustainability of external imbalances in the oecd countries the authors wish to thank three anonymous referees for helpful comments to a previous version financial support from the spanish institute for fiscal studies the spanish ministry of economy and competitiveness projects eco2011 29314 c02 02 o bajo rubio and c diaz roldan and eco2011 30260 c03 01 v esteve and the department of education and science of the regional government of castilla la mancha project peii09 0072 7392 is also gratefully acknowledged v esteve also acknowledges support from the generalitat valenciana project gvprometeo2009 098

parents discount rates for child quality contemporary discussions of economic growth make human capital or knowledge accumulation its primary engine 25 human capital as the lead component of the stock of wealth defines a developed economy becker and murphy 4 show that human capital both increases and is increased by the scope of the market its rate of return rises with the size of its stock 5 human capital also plays significant roles in models of human fertility choice 40 population and environmental degradation 11 34 capital mobility 3 and endogenous technological progress 33 a substantial portion of an adult s human capital is accumulated during childhood children as children however cannot independently contract for the resources required to support investments in this human capital though nearly every society grants parents wide discretion about the nurture they provide their children little is understood about what motivates investment by one generation in another the relative importance of different investment modes or the discount rates which parents apply whatever the motivation and the mode because of the long time span between birth and adulthood parents discount rates potentially exert great leverage upon the investment decisions they make for their children knowledge of these discount rates is a prerequisite to acquiring an improved understanding of the internal decision processes of the household a collective decision unit which economics mostly treats as a black box 1 important policy questions as well as scientific accuracy and logical consistency demand knowledge of the discount rates parents apply to investments in their children healthier better educated and wealthier children have a better chance in life but there is no evident reason to suppose that intrafamily discount rates are socially optimal 2 many of the private reactions and behaviors which reinforce or temper the intended effects of public policies are internal to the household when these intended effects have a substantial temporal dimension parental discount rates will be influential for example increased public investments in children can be neutralized

testing intertemporal budget constraints theory and applications to u s federal budget and current account deficits this paper extends previous tests of intertemporal budget balance and present value relationships by expanding the set of allowable deficit processes and by deriving a testable condition that is sufficient to ensure intertemporal budget balance as long as the expected discount rate is strictly positive using these tests the authors find that both the postwar federal budget deficit process and the process governing accumulation of u s assets by foreigners are consistent with intertemporal budget balance copyright 1991 by ohio state university press

global imbalances and the intertemporal external budget constraint a multicointegration approach abstract this paper analyzes the external solvency of a group of 23 oecd countries for the period 1970 2012 the empirical strategy adopted underlines the increasing importance of the financial channel for the external adjustment as proposed in gourinchas and rey 2007 we unify the traditional approaches to testing for external sustainability considering the stock flow system created by the variables representing the external relationships of an open economy external sustainability is tested using several types of cointegration and multicointegration tests the results obtained point to weak sustainability in the flows analysis whereas some degree of strong sustainability is found for up to six countries in the stock flow approach among these countries we find both non european economies such as japan and new zealand and euro area members especially those with more restricted access to financing in the international markets

international trade and air pollution damages in the united states abstract this paper investigates the health and economic consequences of trade due to various air pollutants embodied in exports and imports we compare the us emissions generated for us exports and those that were avoided by importing an input output framework of the us economy is employed together with a comprehensive database on damages expressed in monetary terms generated by pollutants as estimated by muller et al 2011 we find that damages associated with international trade in 2002 were considerable the net result is that damages were avoided through trade and that these avoided damages amounted to 2 7 of the us trade deficit and 3 4 of the us value added associated with trade moreover the computed damage to value added ratios differed greatly across industries exports in some industries are so hazardous that more than half of the value added gained from extra exports disappeared due to environmental damages these findings imply that the us might benefit more from trade by increasing its exports more in low damage intensive products than in high damage intensive products

rates of time preference and valuations of the duration of life abstract this paper develops a multi period markov model of the lifetime choice of occupational fatality risks the empirical model analyzes the wage effects of job risks using the 1982 university of michigan panel study of income dynamics in conjunction with death statistics from the u s national traumatic occupational fatality survey evidence regarding workers intertemporal choices with respect to risks with long term implications is broadly consistent with rational behavior workers implicit real rate of time preference with respect to future life years equals approximately 11 percent this rate of time preference decreases with education

tests for parameter instability in regressions with i 1 processes this article derives the large sample distributions of lagrange multiplier lm tests for parameter instability against several alternatives of interest in the context of cointegrated regression models the fully modified estimator of phillips and hansen is extended to cover general models with stochastic and deterministic trends the test statistics considered include the supf test of quandt as well as the lm tests of nyblom and of nabeya and tanaka it is found that the asymptotic distributions depend on the nature of the regressor processes that is if the regressors are stochastic or deterministic trends the distributions are noticeably different from the distributions when the data are weakly dependent it is also found that the lack of cointegration is a special case of the alternative hypothesis considered an unstable intercept so the tests proposed here may also be viewed as a test of the null of cointegration against the alternative of no cointegration the tests are applied to three data se

environmental accounting for pollution in the united states economy this study presents a framework to include environmental externali ties into a system of national accounts the paper estimates the air pollution damages for each industry in the united states an inte grated assessment model quantifies the marginal damages of air pol lution emissions for the us which are multiplied times the quantity of emissions by industry to compute gross damages solid waste com bustion sewage treatment stone quarrying marinas and oil and coal fired power plants have air pollution damages larger than their value added the largest industrial contributor to external costs is coal fired electric generation whose damages range from 0 8 to 5 6 times value added jel e01 l94 q53 q56

efficient estimation of structural hedonic systems when a product or job is not homogeneous but instead embodies several different characteristics it is difficult to use price information about the product to learn anything about the structure of the supply and demand for the embodied characteristics s rosen 1974 highlighted this problem and suggested that the estimated slope of the price characteristic relation the marginal price could be used instead of standard prices in otherwise standard estimation of the supply and demand system however recently brown and h rosen 1982 brown 1983 and mendelsohn 1985 have pointed out that this method is applicable only when the marginal price depends on variables not found in the supply and demand equations in this paper we show that since the hedonic system matches consumers with high demand for the characteristic to firms with low costs of producing it exogenous variables from the supply equation are not valid instruments in the demand equation and vice versa therefore even when the brown rosen mendelsohn brm condition holds estimation of the identified system by standard simultaneous equations techniques will produce inconsistent estimates we then show that the system can be identified despite the absence of the standard instruments and develop an efficient estimator for the identified system since cross equation constraints make estimation of hedonic systems particularly vulnerable to specification error we also consider some specification tests in this section we consider a simple model with only one characteristic the extension to several characteristics is straightforward the basic model developed by rosen can be described as follows firms with different technologies produce products which provide consumers with varying levels of some characteristic z each consumer buys one unit of the good the product is such that an amount of z from two units of the good provides less utility than the same amount of z embodied in a single unit e g acceleration in a car safety in a job consumers

regime shifts in stock flow i 2 i 1 systems the case of us fiscal sustainability in the last two decades fiscal sustainability has been tested through the use of non stationary time series analysis two different approximations can be found in the literature first a univariate approach that has focused on the stochastic properties of the stock of debt and second a multivariate one that has focused on the long run properties of the flows of expenditures and revenues i e in the stochastic properties of the deficit in this paper we unify these approaches considering the stock flow system that fiscal variables configure our approach involves working in an i 2 stochastic processes framework given the possibility of the existence of regime shifts in the sustainability of us deficit that the literature has pointed out we develop a new statistic that can be applied to test several types of i 2 cointegration and multicointegration relationships allowing for regime shifts to test for these kinds of changing long run relationships we propose the use of a residual based dickey fuller class of statistic that accounts for one structural break we show that consistent estimates of the break fraction can be obtained through the minimization of the sum of squared residuals when there is i 2 cointegration the finite sample performance of the proposed statistic is investigated by monte carlo simulations the econometric methodology is applied to assess whether the us fiscal deficit and debt are sustainable copyright 2010 john wiley sons ltd

using rank data to estimate health state utility models in this paper we report the estimation of conditional logistic regression models for the health utilities index mark 2 and the sf 6d using ordinal preference data the results are compared to the conventional regression models estimated from standard gamble data and to the observed mean standard gamble health state valuations for both the hui2 and the sf 6d the models estimated using ordinal data are broadly comparable to the models estimated on standard gamble data and the predictive performance of these models is close to that of the standard gamble models our research indicates that ordinal data have the potential to provide useful insights into community health state preferences however important questions remain

discounting environmental health risks new evidence and policy implications abstract when environmental policy benefits accrue over a long time horizon the valuation problem becomes more complex some analysts support the use of financial market interest rates for discounting deferred health benefits while others argue against discounting altogether we address the discounting issue by estimating implicit discount rates for deferred health benefits exhibited by workers in their choice of job risk wage responses to variation in life years at risk provide direct estimates of the discount rate that workers apply to their future utility the estimated real discount rate equals approximately 2 consistent with financial market rates for the period

averting catastrophes the strange economics of scylla and charybdis faced with numerous potential catastrophes nuclear and bioterrorism mega viruses climate change and others which should society attempt to avert a policy to avert one catastrophe considered in isolation might be evaluated in cost benefit terms but because society faces multiple catastrophes simple cost benefit analysis fails even if the benefit of averting each one exceeds the cost we should not necessarily avert them all we explore the policy interdependence of catastrophic events and develop a rule for determining which catastrophes should be averted and which should not jel d61 q51 q54

misperceived job hazards and welfare abstract bayesian workers produce chemicals hazardously in one sector of a two sector economy having one safe sector adopting an expected ex post welfare perspective we show workers misperceptions of hazards entail a classic externality we characterise chemicals competitive monopoly and socially efficient outputs assuming workers receive identical wage accident compensation contracts under each the value of information which induces workers to place greater stress on firms safety records or sharpens their priors and extend the standard monopoly welfare loss index for sufficient conditions for monopoly to be preferred to competition in chemicals and for size ranking monopoly and efficient chemical outputs

sustainability of the deficit process with structural shifts this article discusses the condition for deficit sustainability and searches for shifts in the structure of u s deficit policy i show that contrary to the current literature cointegration between revenues and expenditures inclusive of debt payment is not a necessary but a sufficient condition for a strict interpretation of deficit sustainability the necessary condition requires that debt grow slower than the borrowing rate for tests on structural shifts i use a test for structural change that searches for shifts in the rank of the cointegrating matrix i find that there is a shift in deficit policy in the early 80s so that cointegration between revenue and expenditure inclusive of interest payments holds only up to 1980 i show however that the deficit process is still sustainable despite the failure of cointegration in the 80s the finding of shifts in the deficit process is more uncertain when i normalize by gross national product or population but the deficit is shown to be sustainable regard

international intertemporal solvency in industrialized countries evidence and implications recent large current account deficits among industrialized countries have caused concern for policy makers some believe for example that the current buildup of claims on the u s by foreigners violates her solvency condition with respect to the rest of the world recent research 22 suggests that for a country s intertemporal solvency condition to hold the change in the country s obligations to the rest of the world i e her current account deficit must be stationary stationarity tests on current accounts were performed for the u s by trehan and walsh 22 and wickens and uctum 23 for the u s and canada by otto 15 and for twenty three countries by gundlach and sinn 10 these papers present evidence that current accounts are non stationary for several major industrialized countries including the u s the u k canada germany and japan these findings do not favor international intertemporal solvency for this reason the issue merits further investigation in this paper we test for the stationarity of current account deficits of the group of seven industrialized countries preliminary results confirm many of gundlach and sinn s 10 findings however several events during the 1980s might have caused discrete breaks in current account balances events potentially linked with current account breaks include the reduction in world inflation tax reduction and reform in the u s and other industrialized countries attempts at international macroeconomic coordination i e the plaza accord and shifts in the after tax rate of return on capital in many countries as shown in recent research on gross national product 16 2 if such breaks are not accounted for stationarity tests will be biased in favor of accepting the null hypothesis of non stationarity our results suggest strong evidence of discrete breaks in the u s and japan and some evidence favoring breaks in the u k germany and canada the break in the u s current account appears to occur in 1983 while breaks in the other countries appear to occur somewhat later between late 1984 and 1987 more importantly once these breaks are incorporated the evidence is more favorable toward the stationarity of current accounts in these countries these findings thus support intertemporal solvency for these countries

dynamic inconsistency in valuing environmental goods abstract intertemporal tradeoffs continue to intrigue both academics and policy makers this paper explores patterns of dynamic inconsistency in valuing environmental goods we develop a model that predicts an individual will value extended access to an environmental good less than avoiding delayed access if time and money are complementary this value disparity results in a low marginal rate of time preference for avoiding delayed access and a high rate for acquiring extended access using the contingent valuation method we find behavior partially consistent with predictions marginal rates of time preference are highly situation and individual specific

time preference and life cycle consumption with endogenous survival we provide a structural theory of time preference and derive a functional form of intertemporal preferences by postulating that individuals make their life cycle consumption choices as if to maximize expected lifetime this yields a nontime separable expected utility representation where the inverse of the coefficient of intertemporal substitution exceeds the coefficient of relative risk aversion the rate of time preference depends on the inverse of expected remaining lifetime and the effect of age on the productivity of consumption in affecting health the preference formulation is applied in a standard intertemporal consumption model to illustrate the implied life cycle consumption choices

valuing future risks to life environmental policies that alter future mortality rates may affect both current and future generations this paper examines willingness to pay for future risk reductions from the perspective of the current generation the life cycle consumption saving model implies that an individual discounts future risks to himself at the consumption rate of interest if capital markets are perfect the consumption rate equals the market rate of interest otherwise the consumption rate exceeds the market rate and numerical results suggest that the implied discount factor may be substantial the overlapping generations model implies that a member of the current generation discounts the value of risks to future generations at the rate at which current consumption is substituted for a bequest

sustainable balance of trade deficits abstract this paper analyzes a model of overlapping generations in which there are two currencies there are two agents born in each period and these agents have completely heterogeneous preferences and endowments the paper shows that there are monetary equilibria in which one country can sustain a trade deficit whose present value is arbitrarily close to that of its trading partner s entire stream of resources hence there may be no limit to the present value of a country s trade deficit even if the equilibrium for the world economy satisfies an intertemporal efficiency criterion

investigation of production sales and inventory relationships using multicointegration and non symmetric error correction models the accumulated sum of a stationary series is called integrated if a linear combination of some of the integrated series is stationary it is said to be cointegrated this paper presents empirical results on inventories to consider the possibility of a deeper form of cointegration called multicointegration which is introduced in granger and lee 1989 a vector integrated series is multicointegrated if the accumulated sum of its stationary cointegrated linear combination is again cointegrated with itself inventory which is the accumulated sum of production minus sales is probably cointegrated with production and sales the empirical results generally support the presence of multicointegration of production and sales in many u s industries and industrial aggregates the results also favour the non symmetric error correction model providing evidence that the strength of attraction is different on both sides of the attractor a modified s s rule for inventory control is investigated in the context of a non symmetric error correction model and the results generally do not support the s s rule sufficient evidence is found to conclude that multicointegration is a useful concept in the area of inventory determination

the sustainability of current account deficits abstract this paper proposes a new method of determining whether a country is likely to be able to sustain its current account deficits without defaulting on its debt it is based on the notion of the national intertemporal budget constraint ibc which is derived from a forward solution of the balance payments identity although the problem is formally similar to that considered in the literature on the government ibc a more general solution is obtained by allowing the primary deficit to be endogenous instead of exogenous it is shown that the existence of negative feedback from net indebtedness to the primary deficit a wealth effect is sufficient this method supplants the ad hoc approach previously adopted in the current account literature whilst many of the same variables appear a formal structure for analysing them is provided

the economics of risks to life this study asks two questions 1 what is the net value to the representative individual over his life time of activities that alter age specific mortality risks 2 what is the cost to the representative individual of activities that take a life at random at a given age results derived from an economic demographic model with full age specific accounting have a strong actuarial flavor alterations in the mortality schedule caused say by a medical breakthrough should be assessed on the utility of expected additional life years production and reproduction less expected social costs of support loss of life at a specific age due to an accident say should be assessed on the opportunity costs of expected lost years of living lost production and reproduction less expected social support costs the results show that current methods in general leave out an important social transfer term that value of a life lost is highly age dependent and that the degree of diminishing returns to consumption is crucial in calculations of the economic cost of risks

a comparative evaluation of multiattribute consumer preference models in this paper the theory and estimation procedures for several consumer preference models are discussed predictive accuracy in the form of internal consistency of these models is compared in an empirical application consumer decision situations are classified into two classes decisions under certainty and decisions under uncertainty for each of the two classes of decision situations two modeling strategies have been used statistical estimation and algebraic solution an additive conjoint an additive and a multiplicative measurable value and an additive and a multiplicative utility model are considered our main finding is that the statistical estimation procedures outperform their algebraic counterparts on the criterion of predictive accuracy the utility model provides better predictions for decisions under uncertainty than the widely used conjoint models the relationship between models for decisions under certainty and decisions under uncertainty is discussed it is shown how a conjoint or a mea

compensating wage differentials and the value of life abstract this paper examines the relationship between willingness to pay and compensating wage differential measures of the value of a statistical life it resolves some recently noted discrepancies between such measures

the role of intergenerational transfers in aggregate capital accumulation this paper uses historical u s data to directly estimate the contribution of intergenerational transfers to aggregate capital accumulation the evidence presented indicates that intergenerational transfers account for the vast majority of aggregate u s capital formation only a negligible fraction of actual capital accumulation can be traced to life cycle or hump savings a major difference between this study and previous investigations of this issue is the use of more accurate longitudinal age earnings and age consumption profiles these profiles are simply too flat to generate substantial life cycle savings this paper suggests the importance of and need for substantially greater research and data collection on intergenerational transfers life cycle models of savings that emphasize savings for retirement as the dominant form of capital accumulation should give way to models that illuminate the determinants of intergenerational transfers

are stationarity and cointegration restrictions really necessary for the intertemporal budget constraint abstract time series related to fiscal and external deficits are commonly subjected to stationarity and cointegration tests to assess if the deficits are sustainable such tests are incapable of rejecting sustainability the intertemporal budget constraint proves to be satisfied if either the debt series or the revenue and with interest spending series are integrated of arbitrarily high order i e stationary after differencing arbitrarily often revenues and spending do not have to be cointegrated rejections of low order difference stationarity and of cointegration are thus consistent with the intertemporal budget constraint error correction type policy reaction functions are suggested as more promising for understanding deficit problems

evidence of variable discount rates and non standard discounting in mortality risk valuation time discounting is central to the valuation of future health and mortality risks in public sector allocative decision making particularly for environmental policies with delayed health impacts using a risk risk trade off survey we elicit discount rates for fatality risks and establish discounting functional forms on both a sample and an individual level we find wide variation in implicit discount rates for fatality risk between individuals as well as between individual heterogeneity in discounting functional forms in aggregate the sample is best characterised by subadditive discounting our work has implications for the academic investigation of intertemporal choice involving mortality risks and potentially for the evaluation of policy options with delayed mortality risk outcomes a thought experiment cautions against the standard practice of assuming that exponential discounting characterises society s time preferences

rank ordered logit models an empirical analysis of ontario voter preferences this study provides a bayesian investigation of rank ordered multinominal logit models employing conjugate priors for standard multinomial logit models as well as other priors also considered is a specification test of the independence of irrelevant alternatives assumption the proposed techniques are demonstrated in an empirical investigation of ontario voter preferences before the 1988 canadian federal election

government budget deficits and trade deficits are present value constraints satisfied in long term data abstract we test whether long term data from the u s and u k are consistent with the intertemporal government budget constraint and external borrowing constraint both individually and simultaneously a very strong test is provided by our focus on whether the present value constraints pvcs continue to hold despite unusual events such as wars that cause a structural break in the short run dynamic behavior of the variables we find that the pvcs hold over the whole sample period the data also indicate that the pvcs continue to hold following events that cause a structural break in the short run dynamics

quality of life and the wtp for an increased life expectancy at an advanced age abstract in this study we report an attempt to measure the value adult swedes impute to an increased survival probability at high ages a rating scale between the worst possible quality of life 1 and the best possible quality of life 10 is used to indicate the quality of life a person expects to achieve at an advanced age we find a highly significant correlation between this quality measure and the insurance premium a person is willing to pay in exchange for a programme increasing the expected length of life by one year conditional on having survived until the age of 75 years the maximum insurance premium the average person is willing to pay for such a programme is less than 1500 the willingness to pay increase with a person s age but at a low rate the implied average marginal rate of time preference is about 1 percent

on what basis should health be discounted the discount rate to be applied in health care programmes should be based on the time preference rate for health and this same rate should be applied to costs as well due to the limited tradeability of health when eliciting its time preference rate the intertemporal choices must be framed in such a way as to resemble as closely as possible those facing health planners and decision makers

discounting cognition and financial awareness new evidence from a change in the military retirement system the choice given military personnel between an immediate cash payment of 30 000 or a more generous retirement pension permits us to estimate individuals personal discount rates pdrs the resulting pdrs about 7 for enlisted personnel and 2 4 3 for officers are precise and are correlated with a variety of other financial behaviors the pdr is negatively related to educational attainment and the armed forces qualification test but cognition seems to operate through channels other than being better informed better informed individuals were not always measured to be more patient jel d91 d14

differences in education and earnings across racial and ethnic groups tastes discrimination and investments in child quality viewing the united states as comprising many racial and ethnic groups it is shown that group differences in earnings schooling and rates of return from schooling are striking and that the groups with higher levels of schooling also have higher rates of return these data are shown to be consistent with a child quality investment model but they are not consistent with the hypotheses that the primary determinants of schooling level are discrimination minority group status differences in time preference discount rates or tastes for schooling group differences in fertility and female labor supply are examined as partial determinants of investment in child quality policy implications are discussed this paper was originally presented at the 1987 annual meeting of the population association of america see population index vol 53 no 3 fall 1987 p 443 excerpt

heterogeneous rates of time preference and the decision to smoke individuals with higher personal rates of time preference will be more likely to smoke although previous studies have found no evidence of a relationship between smoking and rates of time preference analysis of implicit rates of time preference associated with workers wage fatality risk trade offs indicates that smokers have higher rates of time preference with respect to years of life current smokers have an implied rate of time preference of 13 8 as compared to 8 1 for nonsmokers current smokers who are blue collar workers have rates of time preference with respect to years of life of 16 3 compared to 7 8 for nonsmoking blue collar workers jel i12 d81 d91 smoking imposes substantial health risks many of which are not immediate and will also have long term effects on smokers well being recent estimates of the lost life expectancy due to smoking are 2 4 years for women and 4 4 years for men with some studies indicating even more substantial losses 1 given the latency period before many of the most severe smoking risks are manifested people with greater individual rates of time preference will be less influenced by the discounted value of the health losses and will be more likely to be smokers this paper examines whether this relationship between rates of time preference and smoking behavior is in fact borne out by developing empirical estimates of how smokers and nonsmokers discount years of life lost due to the fatality risks that they incur on the job a variety of researchers have theorized that individuals with higher rates of time preference

the external wealth of nations measures of foreign assets and liabilities for industrial and developing countries abstract although capital flows are closely monitored surprisingly little is known about the accumulated stocks of foreign assets and liabilities held by various countries especially in the developing world this paper constructs estimates of foreign assets and liabilities and their equity and debt subcomponents for a sample of 67 industrial and developing countries it characterizes the stylized facts of international balance sheets and asks whether there are trends in net foreign asset positions and shifts in debt equity ratios over time finally it explores the sensitivity of estimated stock positions to the treatment of valuation effects not captured in balance of payments data

the value of life and the rise in health spending over the past half century americans spent a rising share of total economic resources on health and enjoyed substantially longer lives as a result debate on health policy often focuses on limiting the growth of health spending we investigate an issue central to this debate is the growth of health spending a rational response to changing economic conditions notably the growth of income per person we develop a model based on standard economic assumptions and argue that this is indeed the case standard preferences of the kind used widely in economics to study consumption asset pricing and labor supply imply that health spending is a superior good with an income elasticity well above one as people get richer and consumption rises the marginal utility of consumption falls rapidly spending on health to extend life allows individuals to purchase additional periods of utility the marginal utility of life extension does not decline as a result the optimal composition of total spending shifts toward health and the health share grows along with income in projections based on the quantitative analysis of our model the optimal health share of spending seems likely to exceed 30 percent by the middle of the century

the estimation of a preference based measure of health from the sf 36 this paper reports on the findings of a study to derive a preference based measure of health from the sf 36 for use in economic evaluation the sf 36 was revised into a six dimensional health state classification called the sf 6d a sample of 249 states defined by the sf 6d have been valued by a representative sample of 611 members of the uk general population using standard gamble models are estimated for predicting health state valuations for all 18 000 states defined by the sf 6d the econometric modelling had to cope with the hierarchical nature of the data and its skewed distribution the recommended models have produced significant coefficients for levels of the sf 6d which are robust across model specification however there are concerns with some inconsistent estimates and over prediction of the value of the poorest health states these problems must be weighed against the rich descriptive ability of the sf 6d and the potential application of these models to existing and future sf 36 data set

survival versus consumption we develop an indirect method to estimate utility and willingness to pay wtp for reductions in the risk of death at various ages using a life cycle model of consumption we assume that an individual sets his consumption level each year so as to maximize his expected lifetime utility alternative assumptions about opportunities for borrowing and annuities characterize two polar types of societies in our robinson crusoe case an individual must be entirely self sufficient and annuities are not available in our perfect markets case an individual can borrow against future earnings and purchase actuarially fair annuities we show that under these assumptions wtp is the sum of livelihood discounted expected future earnings and consumer surplus to illustrate our methods we derive wtp for an average financially independent american man under plausible assumptions the model is calibrated to 1978 earnings e g 18 000 per year for men aged 45 54 with at least some income in the robinson crusoe case wtp increases from 500 000 at age 20 to a peak of 1 250 000 at age 40 and declines to 630 000 at age 60 in the perfect markets case age variations are less pronounced wtp is 1 050 000 at age 20 peaks at 1 070 000 at age 25 and declines to 600 000 at age 60 these results suggest that individuals value risks to their lives at several times the pro rata share of their future earnings

using a discrete choice experiment to estimate health state utility values in this study we explored a novel application of the discrete choice experiment dce that resembles the time trade off tto task to estimate values on the health utility scale for the eq 5d the dce was tested in a survey alongside the tto in a sample of english speaking canadians recruited by a market research company the study found that the dce is able to derive logical and consistent values for health states valued on the full health dead scale the dce overcame some issues identified in the version of tto currently used to value eq 5d notably allowing for fewer data exclusions and incorporating values considered worse than dead without introducing a separate valuation procedure this has important implications for providing robust values that represent the preferences of all respondents

choice under uncertainty problems solved and unsolved ffifteen years ago the theory of choice under uncertainty could be considered one of the success stories of economic analysis it rested on solid axiomatic foundations it had seen important breakthroughs in the analytics of risk risk aversion and their applications to economic issues and it stood ready to provide the theoretical underpinnings for the newly emerging information revolution in economics 1 today choice under uncertainty is a field in flux the standard theory is being challenged on several grounds from both within and outside economics the nature of these challenges and of our profession s responses to them is the topic of this paper

the evaluation of disease prevention and treatment using simulation models health policy models provide measures of the effectiveness and costs of complex health care interventions making it possible to compare different policies we look at the validity of models of screening prevention and treatment focusing on two simulation studies in designing models account must be taken of disease trends and changing treatment patterns the choice of modelling technique and of system boundaries are shown to have an impact on results decisions have to be made about data which may be scarce or inappropriate for modelling purposes cost effectiveness measures are based on the ratio of costs to benefits such as life years saved or quality adjusted life years these are sensitive to the time period and the discount rates chosen policy makers should be aware of these different sources of variability or error for decision making purposes the calculation of output measures must be based on the same assumptions

external wealth the trade balance and the real exchange rate abstract we examine the link between the net foreign asset position the trade balance and the real exchange rate in particular we decompose the impact of a country s net foreign asset position external wealth on its long run real exchange rate into two mechanisms the relation between external wealth and the trade balance and holding fixed other determinants a negative relation between the trade balance and the real exchange rate we also provide additional evidence that the relative price of nontradables is an important channel linking the trade balance and the real exchange rate

risky adjustments or adjustments to risks decomposing bank leverage by use of cointegration analysis this paper splits bank leverage into a short and long run dimension regarding the long run if banks leverage ratios or related liability shares are stable over time they form a cointegrating relationship thus cointegration tests indicate whether banks liability ratios were stable or subject to structural breaks during the financial crisis in 2007 and 2008 by endogenous identification of structural breaks my analysis tracks the precise channels of banks leverage adjustments findings on the long run suggest that banks cut their leverage twice in june 2007 banks significantly reduced their foreign debt while in april 2008 they withdrew from interbank borrowing regarding the short run i study how banks adjust to the dynamics of risk proxies from distinct financial markets findings on the short run point out that banks reactions to risks differ considerably across different types of financial markets

measurement of health state utilities for economic appraisal health status measurement for use in economic appraisal of health care programmes is reviewed in this paper with particular emphasis on utility measurement a framework for economic appraisal is presented displaying the various components that must be measured and showing how the three forms of analysis cost effectiveness analysis cost benefit analysis and cost utility analysis relate to the framework and to each other one of the components in the framework is health status it can be measured using ad hoc numeric scales willingness to pay receive or health state utilities the determination of health state utilities is reviewed covering the following issues alternative sources of utilities health state descriptions multi attribute utility approach determination of appropriate subjects utility aggregation and accuracy three measurement techniques for health state utilities are described in detail rating scale standard gamble and time trade off the use of these methods is described for both chronic and temporary health states and for both health states considered better than death and those considered worse than death

optimal antibiotic usage with resistance and endogenous technological change the use of antibiotics poses an impure public goods problem their utilization jointly generates a positive private characteristic that is the health of the individual who consumes the drug and a negative public characteristic that is the reduction in susceptibility that renders the drug less effective over time the authors use an expected utility model to explicitly identify these characteristics in a dynamic setting from a social planner perspective the trade off between present and future use of a drug and the allocation of resources to the development of new drugs is discussed results suggest that the optimal policy would limit the number of people treated with an existing antibiotic through time also the model indicates that short bursts of high level investment in research and development are optimal when the research process is certain while a steady increase in investment over time is warranted when the discovery process is uncertain

assessing the sustainability of external imbalances in the european union we assess the sustainability of the current account ca balance net international investment position niip and net external debt ned in a sample of 22 eu countries using two complementary approaches first we employ time series stationarity tests of current account balance to gdp ratios as well as cointegration tests of exports and imports of goods and services second we assess the level of trade balance that stabilises the niip and the ned we find that there is sustainability of the ca balance in eight countries niip in five countries and ned in 10 countries whereas there is evidence of a lack of sustainability in five debtor nations and three creditor nations both approaches are consistent with each other given the relationship between flows and stocks the existence of structural breaks and valuation effects via exchange rate and interest rate changes

the value of disease prevention vs treatment we present an integrated valuation model for diseases that are life threatening the model extends the standard one period value per statistical life model to three health prospects healthy ill and dead we derive willingness to pay values for prevention efforts that reduce a disease s incidence rate as well as for treatments that lower the corresponding health deterioration and mortality rates we find that the demand value of prevention always exceeds that of treatment people often overweight small risks and underweight large ones we use the rank dependent utility framework to explore how the demand for prevention and treatment alters when people evaluate probabilities in a non linear manner for incidence and mortality rates associated with common types of cancers the inverse s shaped probability weighting found in experimental studies leads to a significant increase in the demand values of both treatment and prevention

the emerging u s current account deficit in the 1980s a cointegration analysis this paper seeks to understand the recent history of u s external imbalances by identifying the long run tendency of the u s current account balance and investigating its behavior the procedure that is adopted is to estimate cointegrating regressions between u s exports and imports of goods and services estimates from cointegrating regressions between several measures of u s exports and imports show that up to about the end of 1983 the u s current account tended toward zero since that time there has been an apparent structural shift resulting in a long run tendency for a deficit in excess of 100 billion per year copyright 1992 by mit press

a new way of thinking about the current account extending the theory of generational accounts the author shows that the conventional current account is not related to the real effects of a country s fiscal policy for any international array of fiscal policies a country can implement its own policy so that the conventional government and current account deficits are zero in every period the author argues that economists should develop a new measure of the current account this measure is forward looking and keeps track of expected transfers between countries copyright 1995 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

the welfare value of fda s mercury in fish advisory a dynamic reanalysis assessing the welfare impact of consumer health advisories is a thorny task recently shimshack and ward 2010 studied how u s households responded to fda s 2001 mercury in fish advisory they found that the average at risk household reduced fish consumption by 21 resulting in a 17 reduction in mercury exposure at the cost of a 21 reduction in cardioprotective omega 3 fatty acids based on a static assessment of the health costs and benefits shimshack and ward concluded that the advisory policy resulted in an overall consumer welfare loss in this note we propose a dynamic assessment that links the long term cardiovascular health effects of the advisory to life cycle consumption we find that under reasonable assumptions the welfare loss might be much larger than suggested our analysis highlights the importance of accounting for dynamic effects when evaluating persistent changes in exposure to environmental health risks

is the age 60 rule relevant in 1960 the federal aviation administration in the united states put in place the age 60 rule that required airline pilots to retire upon reaching the age of 60 years this rule has been challenged on numerous occasions but the faa has not changed the rule a logit model is used to analyse accidents and incidents for 1989 such factors as piolt training and experience aircraft characteristics and whether are considered in analysing the impact of pilot age to age 65 on accidents age is not found to be a statistically significant factor for pilots in three licence classes this study provides indirect evidence that the age 60 rule may be unwarranted

altruism deficit policies and the wealth of future generations i introduction there is now a substantial body of evidence suggesting that altruistic financial bequests are zero for the vast majority of households 1 other studies seem to indicate that the financial bequests which are made are not likely to be altruistically motivated 2 while this evidence against the importance of altruistic financial bequests seems reasonably convincing it is by no means clear that the importance of altruism per se has been dismissed 3 for example the results reported in altonji hayashi and kotlikoff 1992 tables 14 17 indicate that extended family resources while not perfectly linked to own resources are important for explaining own consumption the authors do not reject the notion that substantial altruistically motivated transfers occur in the u s rather they suggest the altruistically motivated transfers which are made take the form of less than fully efficient human capital transfers to children if most altruistic transfers do take place via educational expenditures how does this affect the ricardian equivalence theorem robert barro 1974 1989 argues the presence of any altruistic transfer is sufficient to guarantee that intergenerational transfers caused by government policy are neutral other forms of intergenerational transfers such as inter vivos gifts to children support of children s education and so on can work in a similar manner therefore the ricardian results will hold even if many persons leave little in the way of formal bequests 1989 41 4 an alternative view however is expressed by allan drazen 1978 he argues if parents possess an insufficient mix of wealth and altruism intergenerational transfers could be exhausted before the efficient level of human capital investment is achieved if explicit or implicit loans between parents and children are not possible then the government may be able to improve welfare by generating intergenerational transfers from children to parents 5 a cut in the parents tax burden and an equal present value increase in the tax on the next generation is equivalent to a government enforced loan at the going market interest rate since educational expenditures are inefficiently low the return on human capital investment exceeds the loan rate therefore parents could put an amount less than the tax cut into their children s education and still leave the children with enough additional income to pay for the future tax increase thus a deficit policy serves to expand the consumption possibility set of the family viewed in this way drazen 1978 514 footnote 7 imagines an argument for a pareto optimal level of public debt issue 6 a third possibility was identified by nerlove razin and sadka 1988 who conduct the most explicit analysis of government transfers in an economy with altruistic but financial bequest constrained households they also find a transfer or implicit loan to parents from their children will make the parents unambiguously better off however they were the first to point out that a deficit policy may lower the welfare of the children although they fail to explain why thus even in the presence of altruistic transfers from parents to children the effect of deficits on the consumption of future generations is far from clear in this paper we wish to clarify the effect of intergenerational transfers on bequest constrained families the next section intuitively explains why a government loan or deficit policy generates an ambiguous effect on the children s consumption even though altruistic parents are fully capable of making both generations better off after the loan we also identify the key structural determinants of the change in the children s wealth due to the loan in section iii we extend the simple model of section ii to a more quantitatively realistic multi period life cycle simulation model of a bequest constrained household the simulation model is then used in section iv to examine how a government intergenerational transfer affects the consumption of each generation under various settings of the key structural determinants identified in section ii

valuing environmental health effects an economic perspective this paper provides an overview of some of the issues involved in comparing benefit cost analysis and cost effectiveness analysis based on quality adjusted life years as alternative approaches to assessing environmental policies that affect human health it concludes that i although qalys have the advantage of reflecting policy impacts on both health status and longevity in a single scalar measure they are not consistent with utility theory unless individuals preferences satisfy some restrictive conditions ii they do not capture other important aspects of the valuation of changes in mortality and morbidity iii cost effectiveness analysis based on qalys as a measure of effectiveness omits non health related effects of environmental policy and iv it leaves unanswered the important question of what level of environmental regulation is appropriate