the trick is to live is the estate tax social security for the rich because estate tax liability usually depends on how long one lives it implicitly provides annuity income in the absence of annuity markets lump sum estate taxation may be used to achieve the first best solution for individuals with a sufficiently strong bequest motive calculations of the annuity embedded in the u s estate tax show that people with 10 million of assets may be effectively receiving more than 100 000 a year financed at actuarially fair rates by their tax payments according to my calibrations the insurance effect reduces the marginal cost of funds mcf for the estate tax by as much as 30 percent and the resulting mcf is within the range of estimates for the mcf for the income tax

delays in claiming social security benefits this paper focuses on social security benefit claiming behavior a takeup decision that has been ignored in the previous literature using financial calculations and simulations based on an expected utility maximization model we show that delaying benefit claim for a period of time after retirement is optimal in a wide variety of cases and that gains from delay may be significant we find that approximately 10 of men retiring before their 62nd birthday delay claiming for at least one year after eligibility we estimate hazard and probit models using data from the new beneficiary data system to test four cross sectional predictions while the data suggest that too few men delay we find that the pattern of delays by early retirees is generally consistent with the hypotheses generated by our theoretical model

accounting for external costs in a study of a swedish district heating system an assessment of environmental policies sweden has historically had strict emission control by implementation of economic policy instruments with the aim of internalising the external costs of air pollution this study aims to evaluate how well current swedish policy instruments reflect the environmental costs associated with heat generation in several district heating dh plants in the dh system of goteborg furthermore it aims to simulate and evaluate the operation of the dh system based on its social cost effectiveness which takes into account the dh system s private and external costs non internalised environmental costs the study shows that the economic policy instruments do not fully internalise all external costs whereas for certain technologies the costs in terms of taxes emission permits environmental fees etc are higher than the environmental costs caused by the pollutants given the environmental cost estimates used in the study the simulation results show that the deviating internalisation of external costs affects the economic ranking of the different plants within the studied dh system the estimated loss in social cost effectiveness of the operation of the dh system of goteborg is noticable but relatively small if compared to the variable heat generation costs for most of the studied dh plants c 2010 elsevier ltd all rights reserved

social security liquidity constraints and pre retirement consumption one of the primary goals of the social security retirement program is the maintenance of consumption in old age in the past decade since the pioneering paper by feldstein 13 studies have examined the impact of the system on consumption over the entire life cycle and not just in old age empirical work has tested the impact on consumption of the individual wealth transfers accompanying the introduction of a pay as you go social security system extending this discussion of the impact of social security on pre retirement consumption hubbard 21 has shown in the context of lifetime uncertainty that even an actuarially fair fully funded social security system can raise lifetime consumption hence previous partial equilibrium estimates of the impact of social security on consumption drawn solely from consideration of the intergenerational wealth transfer at the introduction of the system are underestimates of the potential effect 2 an important assumption in the approaches cited above is that of perfect capital markets i e that individuals can borrow against prospective gains from participating in the social security system such an assumption is at variance with actual limitations on borrowing e g upward sloping interest rate schedules collateral requirements and quantity restrictions hayashi 18 found that approximately twenty percent of all consumption in the u s is accounted for by liquidity constrained consumers 3 flavin 16 found that the estimate of the marginal propensity to consume is affected dramatically by the inclusion of proxies for liquidity constraints suggesting that liquidity constraints are an important part of the observed excess sensitivity of consumption to current income since its inception in 1935 old age and survivors insurance oasi provided

multicriteria analysis vs externalities assessment for the comparative evaluation of electricity generation systems attributing costs to the environmental impacts of energy production and use could greatly assist in environmental planning because monetary values are capable of directly influencing energy decisions without changing the rules of the market despite the considerable progress made recently in the valuation of environmental externalities there is still an open debate about the reliability of the estimated damage costs this paper is aimed at comparing the external costs calculated for a number of power plants using different energy sources with the outcome of a multicriteria analysis where environmental impacts are expressed in physical terms or on a qualitative scale similarities and disparities in the obtained rankings are identified and clarified on the basis of the fundamental principles of the two approaches it is concluded that although external costs do not accurately reflect the traditional value system of individual decision makers they give suitable price signals and thus help in eliminating distortions of the current energy market

dynamic conjectural variations in a lanchester oligopoly an approach based on dynamic conjectural variations is advanced for developing dynamic advertising strategies in a lanchester oligopoly differential game the approach allows competitors to anticipate rival reactions to market share state variables and maintains the computational advantage of open loop nash equilibrium strategies in an empirical application to the ready to eat cereal industry it is shown that advertising strategies based on dynamic conjectural variations can better explain the advertising of the cereal competitors than can open loop advertising strategies

population growth and savings in ldcs a survey article both population growth and savings have traditionally taken a certain place of pride among models of growth and development the purpose of this paper is to examine the literature concerning the hypothesis that the savings rate itself is a function of the population growth rate and this effect exacerbates the negative effect of population on economic growth the evidence is examined from three perspectives i macroeconomic effects of variations in the age structure of the population ii choice theoretic models of family decision making particularly the joint determination of fertility decisions and savings decisions and iii market level interactions of variables which determine individual decisions the paper concludes that both population growth and savings rates are inextricably tied up in the process of economic development there are many ways in which the two variables may interact but no generalizations can be safely made across countries

dynamic competition valuation and merger activity we model the interactions between product market competition and investment valuation within a dynamic oligopoly to our knowledge the model is the first continuous time corporate finance model in a multiple firm setting with heterogeneous products the model is tractable and amenable to estimation we use it to relate current industry characteristics with firm value and financial decisions unlike most corporate finance models it produces predictions regarding parameter magnitudes as well their signs estimates of the model s parameters indicate strong linkages between model implied and actual values the paper uses the estimated parameters to predict rivals returns near merger announcements

the optimal level of social security benefits the optimal level of social security benefits depends on balancing the protection that these benefits offer to those who lack the foresight to provide for their own old age against the welfare costs of distorting economic behavior the primary such cost is the distortion in private saving the present paper derives the level of social security benefits that is optimal in three basic cases in the first section the paper derives the optimal level of benefits for an economy in which all individuals do not anticipate retirement at all and therefore do no saving the second and third sections then derive optimal benefits for two different definitions of incomplete myopia

life cycle modeling of bequests and their impact on annuity valuation in this paper we introduce a linear bequest motive into a standard life cycle model both allowing for credit and annuity market imperfections first we characterize the consumption and wealth processes we find that consumption is non increasing in the linear bequest parameter for the simplest certainty case but that the same is not true for life span uncertainty second we study the issue of annuity valuation for a sufficiently strong bequest motive the true value of an annuity is equal to the actuarial value this invalidates a previous claim that for imperfect annuity markets it is close to the simple financial value c 2001 elsevier science bn all rights reserved

some microeconomic evidence concerning the determinants of saving through private pension funds in the u s abstract this note presents some new evidence about determinants affecting the contributions to private pension plans through the bargaining process employer decisions about pensions reflect employee preferences according to our estimation results on a time series basis there is a clear significant relationship between the firm variables social security taxes and saving through private pension plans

wealth distribution in life cycle economies abstract this paper compares the age wealth distribution produced in life cycle economies to the corresponding distribution in the us economy the idea is to calibrate the model economies to match features of the us earnings distribution and then examine the wealth distribution implications of the model economies the findings are that the calibrated model economies with earnings and lifetime uncertainty can replicate measures of both aggregate wealth and transfer wealth in the us furthermore the model economies produce the us wealth gini and a significant fraction of the wealth inequality within age groups however the model economies produce less than half the fraction of wealth held by the top 1 percent of us households

the illusory effects of saving incentives on saving the authors evaluate research on how tax based saving incentives iras and 401 k s affect saving previous research overstates the impact of the incentives on saving by failing to account for several issues households with saving incentives have stronger tastes for saving than others saving incentives have interacted with debt nonfinancial assets financial markets and pensions and saving incentives represent pretax balances whereas taxable accounts represent posttax balances accounting for these issues essentially eliminates the impact of saving incentives on saving the authors conclude that little if any of the contributions to existing saving incentives have raised saving

an experimental test on retirement decisions i introduction the reform of social security systems is now one of the main issues on the economic policy agenda of most industrialized countries it is widely considered that unless serious changes take place the aging of the population implying a rise in the number of retirees relative to that of workers will threaten the viability of pay as you go public pension systems in the long run this threat is being reinforced by the progressive reduction in the retirement age of the working population the central reforms that are being proposed to neutralize these future financing problems are the raising of the contribution rate the decreasing of pension benefits or and the delay of the retirement age with reference to this latter reform as blondal and scarpetta 1998 state a direct way to encourage people to work longer would be to raise the pensionable age but delaying the retirement age may not be very popular according to recent surveys most workers claim that they are happy with the current retirement age see cremer and pestieau 2003 this may help to explain why reforms on the legal retirement age have currently become a very delicate matter for governments 1 on the other hand pension systems in virtually all organization for economic cooperation and development oecd countries in the mid 1990s made it financially unattractive to work after the age of 55 see gruber and wise 1997 or blondal and scarpetta 1998 indeed the general consensus in the theoretical literature related to social security and retirement decisions is that pension systems create enormous incentives to leave the labor force early 2 therefore increasing the retirement age as a tool to improve the financial problems of public pensions systems faces two sensitive problems the opposition of workers to a delay in the standard retirement age and the disincentives to continuous work being embedded in the pension system the large decline in labor force participation is attributed to the specific fact that to keep on working implies a reduction in the present value of total pension benefits the terms old age pension wealth and implicit tax on postponing retirement have been frequently used to illustrate these disincentives in the pension system the old age pension wealth is the discounted value of expected pension benefits minus the discounted cost of obtaining such benefits after the earliest age at which pensions can be accessed working for an extra year may imply changes in this pension wealth by foregoing 1 yr of pensions paying contributions for an additional year and maybe increasing the pension benefits per year therefore if the costs of postponing retirement are higher than the gains then it is considered that the pension system is implicitly taxing to prolong the working period that is the drop in pension wealth acts as an implicit tax on income from continued work and as such is a clear incentive to retire early actually reforms aiming to increase the effective retirement age to improve the financial problems of public pensions systems have mainly focused on the reduction of this implicit tax on prolonging the working period it is also considered that when the increase in pension benefits is exactly offset by the higher cost in terms of contributions and forgone pensions the pension system is not distorting the retirement decision that is the pension systems that are marginally actuarially fair will not distort individual decisions concerning retirement age and consequently they are defined as neutral systems for this reason the main economic policy measures move in the direction of strengthening the link between lifetime contributions and pension benefits 3 indeed this reform is one of the policy conclusions of maintaining prosperity in an ageing society oecd 2000 the most appropriate reform would be to allow people to retire at the age of their own choice and to adjust pension level so that the pension system is neutral on average

do tax incentives for saving in pension accounts cause debt accumulation evidence from danish register data abstract this paper applies a quasi experimental research design on a danish 2010 policy that reduced tax incentives for saving in annuity pension schemes to show significant substitution of savings from retirement accounts to gross debt repayments we find that for every 1 danish currency unit reduction in retirement savings 31 cents goes to debt repayments taking into account all types of savings we find full crowding out consistent with previous findings we document that the effect is driven by a minority about 23 percent who actively rebalance their savings

the effects of public pensions on private wealth evidence on the german savings puzzle based on german panel data between 1984 and 1999 we test for the interaction of social security benefits and private wealth formation in a simple life cylce model benefits from public pension systems should displace equal amounts of private retirement accumulation our estimate for the offset effect corrected for several possible measurement biases is much lower however than expected from pure life cycle considerations and less than comparable estimates for the us and the uk this result thus supports other evidence on a particular german savings puzzle which might be due to market imperfections and or bounded rational behaviour

capital accumulation and the characteristics of private intergenerational transfers many recent studies of the process of family accumulation in general and household response to social security in particular have revealed growing dissatisfaction with the life cycle theory of saving see for example barro 1978 kotlikoff 1979 darby 1979 kotlikoff and summers 1981 kurz 1981 blinder gordon and wise 1981 david and menchik 1982 leimer and lesnoy 1982 an alternative to the life cycle hypothesis is expressed by defining the preference of each family over its own consumption as well as the welfare of the generations that follow thus each family consists of an infinite chain of generations who have interdependent preferences and for this reason we shall call it the inter generational hypothesis it was recently used by barro 1974 1978 to attack the conclusions of the life cycle hypothesis our purpose in this paper is to start the long road of studying the structure of the private inter generational transfer system with the aim of providing additional tests of the two competing hypotheses

social security and the retirement decision the effect of social security and private pensions on individual retirement decisions is modeled relaxing in turn three commonly maintained assumptions perfect capital markets actuarial fairness and certain lifetimes which together imply that there is no effect in each case raising the contribution level can cause systematic changes of either sign in general in individual retirement decisions for social security the effects associated with forced saving and deviations from actuarial fairness probably tend to advance retirement but those effects that arise solely from the insurance aspect of social security and private pensions are ambiguous in sign owing to the presence of a substitution effect that tends to delay retirement because the insurance benefits can be fully realized only by working longer

the incidence of medicare abstract the medicare program transfers nearly 300 billion annually from taxpayers to beneficiaries this paper considers the incidence of such transfers in the context of a life cycle model with uncertainty about future health care expenditures we find the distributional consequences of the medicare program are roughly neutral in dollar terms households living in high income neighborhoods pay more in taxes but they also receive more in benefits these dollar flows however ignore the insurance value of the medicare system given the incomplete insurance coverage of lower income elderly households prior to the medicare program the money metric benefits to lower income groups exceed the dollar flows suggesting that medicare redistributes more than a simple accounting exercise would suggest

savings in times of demographic change lessons from the german experience pension reforms in many developed countries make individuals shoulder a bigger share of longevity and income risks the desired response is that individuals accumulate private assets for retirement whether this actually takes place is of paramount relevance for scientists and policy makers we take germany as an example twenty years of pension reform have transformed the monolithic german pension system into a multi pillar system formerly generous public pension benefits are gradually being reduced while substantial incentives are granted to occupational and private saving schemes has this transition worked out we survey the reform steps and household s reactions how did individuals adjust their labor market behavior how did private and occupational pension plans take off how do behavioral adjustments vary in the population most germans adapted to the new situation both actual and expected retirement decisions changedand the share of households without supplementary pensions decreased from 73 to 39 in little more than a decade this is a remarkable success nonetheless households with low education low income and less financial education did neither adjust their retirement behavior nor pick up supplementary pension plans and are thus likely to face difficulties in bridging the gap arising in future pension income

imperfect information and dynamic conjectural variations this article analyzes oligopoly interaction in an environment where firms are imperfectly informed about the evolution of the market demand curve the analysis develops a two period cournot framework under the assumptions that demand shifts are positively serially correlated that firms never directly observe the demand curve and that firms never observe the previous quantity decisions of rivals firms do draw inferences about the position of the demand curve from past observations on prices consequently the current output of a firm will influence the current market price which will then influence rivals inferences about future demand the future output decisions of rivals will respond accordingly the theory predicts negative dynamic conjectural variations essentially a firm perceives that an increase in its output will lower the current market clearing price which will cause rival firms to think that the demand curve has shifted down and hence induce them to lower their outputs in the future

the effect of social security on retirement in the early 1970s we analyze detailed longitudinal data on a cohort of males aged 58 67 in 1969 1973 a period of substantial increases in real social security benefits we find the following 1 the accelerating decline in labor force participation of elderly men in 1969 1973 can be explained by the large increase in real social security benefits 2 there is evidence of a liquidity constraint effect for an important subgroup of the elderly 3 the magnitude of this induced retirement effect is large enough that ignoring it can lead to serious underestimation of the fiscal implications of changes in benefit provisions our results are interpreted in the historical context of a particular cohort undergoing major unanticipated transfers of wealth the steady state effects of social security on retirement may not be the same

the korean public s willingness to pay for expanding the use of solid refuse fuel abstract solid refuse fuel srf a solid fuel that is produced from non hazardous combustible waste can mitigate greenhouse gas emissions compared with fossil fuels the korean government plans to enhance the ratio of combustible waste converted into srf from 16 in 2014 to 100 in 2020 by increasing the number of facilities that make and use srf this paper attempts to investigate empirically the korean public s willingness to pay wtp for expanding the use of srf the wtp data were obtained from a one and one half bounded dichotomous choice contingent valuation survey of 1000 households because a considerable number of respondents 62 6 gave a zero wtp response we applied a spike model to treat the wtp data with zero observations the spike model fitted the data well considering that all the coefficient estimates are statistically significant at the 1 level the yearly mean wtp was computed as krw 2479 usd 2 17 per household for the next 10 years which is also statistically meaningful at the 1 level expanding the value to the national population gives us krw 46 4 billion usd 40 5 million per year the present value of the total public wtp amounts to krw 369 0 billion usd 322 3 million using a social discount rate of 5 5 we can conclude that korean households are ready to shoulder some of the financial burden to expand the use of srf

the family as an incomplete annuities market families can self insure against uncertain dates of death through implicit or explicit agreements with respect to consumption and interfamily transfers interfamily transfers need have nothing to do with altruistic feelings they may simply reflect risk sharing behavior of completely selfish family members although family annuity markets are incomplete even small families can substitute by more than 70 percent for perfect market annuities given adverse selection and transaction costs family risk pooling may be preferred to public market annuities in the absence of public annuities these risk sharing arrangements provide powerful incentives for marriage and family formation

on modeling the advertising operations interface under asymmetric competition abstract using a market share attraction structure of advertising competition and following a supermodular game approach this article demonstrates for an asymmetric oligopoly the directional impact of changes in model parameters on the marketing controlled variables of all rivals advertising budgets and the operations controlled variables of all rivals ordered quantities importantly the various changes are examined analytically empirically and numerically in both non dominated and dominated asymmetric oligopolies in this regard the results indicate that firms in a dominated oligopoly one firm of market share larger than or equal to 50 behave differently compared to firms in a non dominated oligopoly each firm of market share less than 50 in response to changes in model parameters furthermore changes in model parameters are investigated in terms of their relative influential impact on a variety of equilibrium measures in this regard the findings indicate that for the analyzed model the marketing parameters exert much more influence on the equilibrium measures than the operations parameters additionally a change in the mode of competition from non cooperation oligopoly to cooperation joint ownership dictates that strong asymmetric firms of favorable marketing and operations parameters continue advertising but at lower levels and weak asymmetric firms of less favorable parameters cease advertising altogether

how income transfer programs affect work savings and the income distribution a critical review for helpful comments on earlier drafts we thank without implicating moses abramovitz yves balcer john bishop alan blinder richard burkhauser michael darby irwin garfinkel alan gustman daniel hamermesh martin holmer george jakubson robert lampman paul menchik robert moffitt michael murray joseph quinn timothy smeeding eugene smolensky barbara wolfe and two anonymous referees

the permanent income hypothesis estimation and testing by instrumental variables the permanent income hypothesis with rational expectation is restated estimated and tested by an instrumental variables technique on the postwar u s aggregate time series data the hypothesis is accepted on a consumption series which includes service flows from consumer durables if the consumption series is the one in the national income and product accounts the hypothesis is decisively rejected an explanation is suggested to reconcile the conflicting test results

the mismatch between life insurance holdings and financial vulnerabilities evidence from the health and retirement study using data on older workers from the 1992 health and retirement survey along with an elaborate life cycle planning model the authors quantify the effect of each individual s death on the financial status of his or her survivors and the degree to which life insurance holdings moderate these consequences the average change in living standard that would result from a spouse s death is small both in absolute terms and relative to the decline that would occur without insurance however this average obscures a startling mismatch between insurance holdings and underlying vulnerabilities for many of the most vulnerable the amounts purchased are surprisingly small and for many of the least vulnerable the amounts are surprisingly large as a result uninsured vulnerabilities are quite widespread the magnitude of these vulnerabilities as well as the proclivity to address any given degree of vulnerability by purchasing life insurance vary systematically with individual and household characteristics

social security and household wealth accumulation refined microeconometric evidence this study examines the relationship between social security wealth and fungible wealth using relatively recent micro data the authors find that a ceteris paribus increase in social security wealth has no effect on fungible wealth suggesting that ricardian equivalence holds of the individual wealth categories comprising fungible wealth only pension wealth is negatively and significantly affected by an increase in social security wealth and if some of this pension wealth is not fully funded ricardian equivalence will not hold the authors conclude therefore that the social security system might adversely affect capital accumulation but not necessarily to the degree suggested by others copyright 1993 by mit press

some microeconometric evidence concerning the effect of the canada pension plan on personal saving growing criticism of canada s retirement income system during the past few years has resulted in renewed pressure on both federal and provincial governments to expand public pension programmes especially the canada pension plan cpp once again this prospect has aroused fears that an unfunded expansion of the public pension system could have a seriously adverse effect on personal saving the adverse effect on personal saving it is argued could in turn lower investment and thereby reduce even further what is already by postwar standards an extremely sluggish rate of productivity growth for the canadian economy however the basis for fearing that public pensions may reduce household saving is somewhat questionable since the wealth replacement effect of public pensions on saving may be offset by an induced retirement effect and perhaps by inter generational transfers in the form of bequests the theory at least is inconclusive in this regard 1 surprisingly enough unlike in the united states where the theoretical indeterminacy concerning the overall impact of public pensions on saving has spawned a multitude of empirical studies the subject has been largely ignored by econometricians in canada but sparse though the empirical evidence may be it does not support the seemingly popular contention that public pensions reduce personal saving in the only published empirical study to date boyle and murray 1979 conclude from their analysis of time series data that canada s public pension plans have had no visible effect on household savings behaviour this paper presents some cross sectional evidence on the response of personal saving to public pensions which appears to conflict with the boyle and murray findings it is organized as follows section i describes the methodology and the data base used the empirical results are analysed in section ii some conclusions follow in section iii

the wealth age relation among the aged aged people face the problem of allocating over the rest of their lifetimes the wealth that they have accumulated during their working years this problem is fairly complex because they are uncertain about the dates of their death and because they may wish to use their wealth to finance general consumption or hold it to meet emergencies leave estates or maintain power or status whether skilled at dynamic programming or not aged people effectively do make these decisions what are the results some studies of the entire lifetime pattern of saving and wealth tend to support the simple life cycle model in which the aged use up their wealth to help finance consumption harold lydall for example found saving rates to increase and then decrease with age in the whole population and to be negative for the group aged 65 and over guarded support for the theory was found by franco modigliani and albert ando in britain and by dorothy projector in the united states more recently a f shorrocks examined the lifetime pattern of wealth holding in estate tax data for a single cohort and found the hump pattern that is characteristic of life cycle saving other evidence on wealth holding runs contrary to this however in a study of estate tax returns in washington d c james d smith found that wealth increased with age among the aged after controlling for other demographic variables examining national estate tax data john brittain found wealth to increase with age in the united states and a b atkinson and a j harrison reported the same pattern in england and wales in a sample of tiaa annuity recipients analyzed by james mulanaphy over half reported that their total savings had increased during retirement and another quarter reported that their savings had remained about the same in this paper i examine wealth holding patterns among aged married couples using survey data representing the entire aged population of the united states in 1968 the statistical analysis serves as a test of the hypothesis that emerges from life cycle theory and provides some further exploration into the economic behavior of the aged i find that the aged tend to increase their wealth over time

a welfare analysis of social security in a dynastic framework in this article we study the welfare effects of unfunded social security in a general equilibrium model populated with overlapping generations of altruistic individuals that differ in lifetime expectancy and earnings ability contrary to previous research our results indicate that steady state welfare increases with social security for most households although by very different amounts this result is mainly due to two factors first the presence of two sided altruism significantly mitigates the crowding out effect of unfunded social security second ability shocks and uncertain lifetimes generate significant heterogeneity among households to yield different induced preferences for social security

fiscal policies capital formation and capitalism abstract this lecture examines the effect of tax policy and social security retirement benefits on capital accumulation and economic welfare the paper begins by examining how capital income taxes reduce the real return to savers and then discusses the welfare loss of capital income taxation relative to the alternatives of taxing consumption and labor income the analysis shows that capital income taxes impose a very substantial deadweight loss even if they do not alter private saving the first section of the paper also discusses the theory and empirical literature on the effect of capital income taxes on national saving the second part of the lecture deals with social security retirement benefits in 1994 the aged members of the u s population will receive cash and medical benefits that cost the government 530 billion or 16 000 per person over age 65 the likely impact of these benefits on private saving and the empirical evidence on this subject are then reviewed the second part of the paper concludes by discussing the welfare loss of unfunded social security benefits and the possibilities for alternative arrangements a final section discusses the implications of international capital flows for this analysis as capital flows become more important particularly in europe the response of government policy may be to compete for foreign capital inflows and to tax domestic savers more heavily this would lead to a smaller total volume of capital the sharp decline in the net national saving rate from more than 8 percent of gdp in the united states in the 1970s to only 4 5 percent in the 1980s and from more than 14 percent of gdp in europe in the 1970s to 9 9 percent in the 1980s may not only create lower real incomes and slower growth but may weaken capitalism itself in the united states a decade of slow growth has increased protectionist tendencies in international trade and led to a new interest in industrial policies that expand the role of government in guiding the direction of technology and of private investment in these ways the government policies that discourage saving might make the schumpeterian vision of a shift from private capitalism to a government dominated economy more likely

savings the policy debate in europe thre issues dominate the public policy debate over savings in continental europe first can private savings substitute for public pensions in the provision of retirement income given that the current generosity of pay as you go financed pensions is hardly sustainable in the light of population ageing and if so which policy steps have to be taken to alleviate this transition second does the evolution of a new financial landscape in europe necessitate policy response in terms of taxation and regulation specifically considering the increase in pension funds and third closely related to the other two issues is there too much or too little saving in an ageing europe do we need to subsidise saving more or less than we currently do the paper reviews economic theory and empirical evidence on these intertwinded issues most importantly it identifies many gaps in our theoretical and empirical knowledge that caution us against overly strong policy recommendations

are life insurance holdings related to financial vulnerabilities using the 1995 survey of consumer finances and an elaborate life cycle model we quantify the potential financial impact of each individual s death on his or her survivors and measure the degree to which life insurance moderates these consequences life insurance is essentially uncorrelated with financial vulnerability at every stage of the life cycle as a result the impact of insurance among at risk households is modest and substantial uninsured vulnerabilities are widespread particularly among younger couples we also identify a systematic gender bias for any given level of financial vulnerability couples provide significantly more protection for wives than for husbands jel d10 g22

dynamic optimal control models in advertising recent developments this paper presents a review of recent developments that have taken place in the area of dynamic optimal control models in advertising subsequent to the comprehensive survey of the literature by sethi in 1977 the basic problem underlying these models is that of determining optimal advertising expenditures and possibly other variables of interest over time for a firm or a group of competing firms under consideration this optimization is done subject to some dynamics that define how these variables translate into sales and in turn into profits the purpose of this update is twofold on the one hand new contributions in the areas already treated in the earlier survey are reviewed on the other hand new trends in the advertising literature since 1977 such as quality as an additional marketing instrument cumulative sales models pulsing advertising and advertising as a part of corporate models of the firm are discussed the models covered in this update are organized under six headings models with ca

pension wealth and household savings tests of robustness abstract a substantial literature exists on the impact of pension schemes both public and private on the level of household saving yet there is no clear consensus on the impact of pensions on private saving in this paper we show how beliefs about this displacement effect are modified by prior beliefs both about variables which might be relevant in an equation for private savings and about the magnitude of the displacement effect using data for 8279 canadian households and estimates of pension wealth both private and social security which we construct for each household in the sample the estimated displacement effects are found to be relatively robust with respect to both types of prior belief

the economic implications of public disability insurance in the united states a review of previous analyses of labor supply effects of social security disability insurance di concludes that estimates of labor supply effects and net social costs are upward biased because they ignore interactions between di and other insurances a model of optimal insurance postinjury accommodations and labor supply shows that reduction in labor supply and increase in consumption when disabled do not necessarily imply moral hazard optimal postinjury accommodations vary inversely with firm size the americans with disabilities act will reduce wages and labor supply of healthy workers particularly in small firms effects on labor supply of the disabled are ambiguous

social security and private saving a reconsideration of the assumptions whether social security discourages private saving has been the focus of an ongoing debate since feldstein s 1974 paper on that paper he assumes that people expect after retirement social security benefits to increase at an annual real rate of 2 in this paper using a wide sample of cross section data we estimate people expected real rate of growth of after retirement social security benefits the estimates range between 0 63 and 0 76 depending on the specification used the obtained estimates are far different from the 2 imposed ad hoc by feldstein these estimates will presumably imply lower values of the social security wealth variable this casts a serious doubt on the strong depressing effect of social security on private saving

the economic effects of social security toward a reconciliation of theory and measurement abstract in this paper we argue that actuarial valuation of social security benefit streams is theoretically inconsistent with the assumption of pure life cycle motives instead we show that the simple discounted value of future benefits ignoring the possibility of death is often a good approximation to the relevant concept of value this observation motivates a re examination of existing empirical evidence concerning the economic effects of social security we focus our attention on studies of distributional equity and personal saving behavior in both cases we argue that the use of simple rather than actuarial discounting of survival contingent income streams produces results that differ dramatically from previous findings specifically estimates based on actuarial valuation may overstate the importance of redistribution between and within generations and may understate the depressive effect of social security on personal wealth accumulation by a factor of three or more

the effect of social security on lifetime wealth accumulation and bequests this paper is an empirical study of the effects of social security on lifetime wealth accumulation and bequests using a sample of wisconsin males we have matched lifetime earnings records from income tax returns with their social security account records and their bequests obtained from probate court records since the cohort of males was born between 1890 and 1899 they represent a cohort that saw a great change in the size and coverage by occupation of the system hence there is substantial within cohort variation in social security wealth from which effects can be estimated for nearly 30 years the life cycle theory of savings has enjoyed an enormous amount of academic support in the no bequest variant individuals save with the sole intention of consuming their savings in later years the economy wide stock of capital can therefore be generated by this pattern without any reliance on bequests modigliani 1966 such a model will lead to rather strong predictions about the effect of a pay as you go public pension hereafter social security on private savings as feldstein 1974 points out social security should displace private savings as well as reduce macro saving since the programme is unfunded this result follows from the assumption that each household will consume all of its assets during its own lifetime some recent research however has been at odds with the no bequest variant of the life cycle model see kurz 1984 and included references darby 1979 claims that life cycle assets savings consumed later in the life cycle constitute only 13 29 per cent of total assets kotlikoff and summers 1981 report that the major share nearly 80 per cent of capital stock in the united states is due to intergenerational transfers 2 indeed these authors write 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 p 706 in addition recent empirical work suggests that people tend to accumulate or fail to significantly decumulate wealth wealth in old age a finding at odds with the strict life cycle model 3 given the potentially large role of bequests in the process of capital accumulation it is important to know how bequests are affected by the large public programme that social security has become even if social security depresses private savings among those near or at retirement if people bequeath it is conceivable that saving during retirement is augmented by the programme 4 aside from the issue of savings effects the response of people s bequests to their old age benefits might allow one to assess the target efficiency of the social security system since the original objective of the system was to ensure adequate levels of consumption among the elderly a finding that benefits

do consumers respond to future income shocks evidence from social security reform in taiwan abstract a prediction of the basic permanent income hypothesis life cycle model is that an unexpected increase in future income produces an immediate increase in current consumption this paper tests that prediction using data from taiwan the 1985 labor standards law granted all employees in covered industries a windfall retirement severance benefit my results indicate that consumption did not increase immediately for those who were granted the windfall relative to those who received no windfall moreover consumption for those receiving a greater windfall did not increase relative to those who were granted less

saving and the life cycle a cohort analysis abstract this paper examines the life cycle hypothesis with reference to japanese employees the study is based on panel data created from successive cross section data which is expected to give better results than past studies the sample was categorized by many elements one important result is that empirical testing of saving and the life cycle is crucially dependent upon the samples it is found that the majority of japanese employees have not accumulated wealth enough to assure consumption during retirement the paper however did not reject a hump shaped course of wealth accumulation under the assumption of myopic behavior

savings of the elderly and desired bequests cross section data often show that the wealth of the elderly increases with age even at advanced ages these and other results suggest that the life cycle hypothesis of consumption should be augmented to include a bequest motive for saving in this paper the author proposes a model of bequests and a test for a bequ est motive using panel data he finds that over a ten year period the elderly in the data set dissaved in contradiction to most cross section results the test offers no support for a bequest motive copyright 1987 by american economic association

uncertain lifetimes and the welfare enhancing properties of annuity markets and social security this paper explores the implications of social security programs and annuity markets through which agents who are characterized by different distributions of length of lifetime share deathrelated risks when annuity markets operate a non discriminatory social security program affects only the intragenerational allocation of resources in the absence of private information regarding individual survival probabilities such a program will lead to a non optimal intragenerational allocation of resources however the presence of adverse selection considerations gives rise to a pareto improving role for a mandatory non discriminatory social security program

annuities and individual welfare advancing annuity demand theory we present suffcient conditions for the optimality of full annuitization under market completeness that are substantially less restrictive than those used by yaari 1965 we examine demand with market incompleteness finding that positive annuitization remains optimal widely but complete annuitization does not how uninsured medical expenses affect demand for illiquid annuities depends critically on the timing of the risk a new set of calculations with optimal consumption trajectories very different from available annuity income streams still shows a preference for considerable annuitization suggesting that limited annuity purchases are plausibly due to psychological or behavioral biases

pensions and household wealth accumulation abstract economists have long suggested that higher private pension benefits crowd out other sources of household wealth accumulation we exploit detailed information on pensions and lifetime earnings for older workers in the 1992 wave of the health and retirement study and employ an instrumental variable iv identification strategy to estimate crowd out the iv estimates suggest statistically significant crowd out each dollar of pension wealth is associated with a 53 67 cent decline in nonpension wealth with less precision we use an instrumental variable quantile regression estimator and find that most of the effect is concentrated in the upper quantiles of the wealth distribution

the sensitivity of consumption to transitory income estimates from panel data on households we investigate the stochastic relation between income and consumption specifically consumption of food within a panel of about 2 000 households our major findings are 1 consumption responds much more strongly to permanent than to transitory movements of income 2 the response to transitory income is nonetheless clearly positive 3 a simple test independent of our model of consumption rejects a central implication of the pure life cycle permanent income hypothesis the observed covariation of income and consumption is compatible with pure life cycle permanent income behavior on the part of80 percent of families and simple proportionality of consumption and income among the remaining 20 percent as a general matter our findings support the view that families respond differently to different sources of income variations in particular temporary income tax policies have smaller effects on consumption than do other more permanent changes in income of the same magnitude this abstract was borrowed from another version of this item

life cycle valuation of social security and pension wealth abstract the proper valuation of annuity wealth is important for many empirical studies of economic behavior and the distribution of wealth and well being this paper examines bernheim s argument that the value of social security benefit streams should be determined by simple discounting rather than by actuarial discounting when consumers behave according to life cycle principles in a model having a more realistic mortality structure than his we document the poor performance of both methods for a broad range of parameter values

the impact of competitive entry in a developing market upon dynamic pricing strategies this paper analyzes dynamic pricing strategies for new durable goods in a two period context the first period is characterized as a monopoly market structure for a new product having dynamic demand the second period begins when a new firm enters the market and thereby changes the market structure to a duopolistic one we begin by analyzing the pricing strategies of three types of monopolists nonmyopic myopic and surprised a nonmyopic monopolist is a first entrant who perfectly predicts the competitive entry a myopic monopolist totally discounts the duopolistic period and a surprised monopolist is a first entrant who has the longer time horizon of the nonmyopic monopolist but who does not foresee the competitive entry our results indicate that the nature of these pricing strategies may be quite different it is optimal for the nonmyopic firm to price its product at a higher level than the myopic monopolist additional results indicate under what circumstances the surprised monopolist will p

optimal pricing strategies for new products in dynamic oligopolies this paper deals with the determination of optimal pricing policies for firms in oligopolistic markets the problem is studied as a differential game and optimal pricing policies are established as nash open loop controls cost learning effects are assumed such that unit costs are decreasing with cumulative output discounting of future profits is also taken into consideration initially the problem is addressed in a general framework and we proceed to study some specific cases that are related to models presented in recent literature three basic classes of sales dynamics are analyzed competition with price effects only competition with price as well as adoption effects and competition with adoption effects only in some cases it turns out that results which hold for the monopoly case carry over to the multi firm case in the sense that the qualitative structure of optimal pricing strategies is the same in the monopoly and the oligopoly cases however due to competitive interdependencies differences certainly exist in the levels as well as the rates of change of optimal prices

an empirical analysis of dynamic nonprice competition in an oligopolistic industry this article develops a dynamic model of nonprice competition in an oligopolistic industry and uses it to analyze advertising competition in the u s cigarette industry the model generalizes existing studies by allowing advertising to affect both firm market shares and the total size of the market the model also allows dynamic conjectural variations to arise from the intertemporal links created by the durability of advertising we use these dynamic conjectural variations to distinguish alternative models of competitive interaction we estimate the complete model of firm production demand and advertising choice by using data for u s cigarette producers the results indicate that firm advertising primarily affects the level of market demand with a firm s effect on rival firms market shares arising through variations in the number of brands sold empirical results on firm behavior suggest that firms act as if their advertising choices will alter the future advertising choices of rival firms in both the high tar and low tar cigarette markets

municipal solid waste management and energy production consideration of external cost through multi objective optimization and its effect on waste to energy solutions abstract energy production from municipal solid waste msw has become one of the most prominent strategies in msw management in this study a multi objective mathematical programming model is developed in order to provide the candidate pareto optimal solutions for a msw management system performing structural design and operational optimization besides the economic criterion the green house gas ghg emissions are taken into account as a second optimization criterion therefore we do not obtain just an optimal solution i e least cost but a set of pareto optimal solutions that spread from minimum cost to minimum ghg emissions each pareto optimal solution provides the corresponding technologies and the capacities that are associated with it an innovative issue is that we incorporate the external costs benefits associated with a atmospheric pollution impacts b impacts on soil and groundwater c impacts on quality of life d electricity use displacement e fertilizer use reduction from compost using the external costs benefits as an additional term in the cost objective significantly affects the results especially regarding the waste to energy options this is clearly illustrated in the case study for the msw management of the athens region in greece

on the robustness and strategic implications of a parsimonious advertising inventory competitive model with extensions to pricing competition abstract using a market share attraction structure of advertising competition this research introduces first a parsimonious inventory advertising model for which competition is limited to two symmetric firms thus obtaining its related comparative statics following a supermodular game approach the derived comparative statics remain robust upon considering non dominant firms each with a market share of less than 50 competing in an asymmetric oligopoly of n rivals where each firm controls the inventory advertising decision variables furthermore changes in model parameters are investigated in terms of their relative impact on equilibrium measures in this regard the findings indicate that for the analyzed model the marketing parameters possess much more influence on the equilibrium measures than the operations parameters the generalization appears applicable to both non dominated oligopolies as well as dominated oligopolies where one firm has a market share equal to or greater than 50 where each firm controls the inventory advertising decision variables in addition to price however changes in shift parameters elicit a response from the dominant firm which will differ from its non dominant rivals for products and services additionally while the literature shows that the non dominant firm will pursue a defensive strategy of decreasing both the equilibrium price and the amount of equilibrium advertising in response to competitive entry our findings show that results for a fixed market potential may not continue to be robust once inclusion of the operations variables of order quantity are considered finally the study explores the implications of the free entry equilibrium for which the number of firms in the industry is determined endogenously

social security uncertainty adjustments and the consumption decision this paper analyzes the consumption decision focusing on the degree of substitutability between fungible assets and prospective wealth and on the different risk adjustments associated with different types of prospective wealth the results reveal substantial differences among these risk adjustments and imply that a dollar of social security wealth substitutes for about three fifths of a dollar of fungible assets although implying that social security wealth reductions would have a positive and sizeable effect on private saving the results also suggest that such reductions could entail a substantial loss in consumer welfare copyright 1992 by the london school of economics and political science

saving social security and uncertainty since alteration of the saving behavior of the present working generation may have such a significant impact on capital stock growth some concern has arisen about the effect of the social security system on saving behavior in response to this concern numerous empirical and theoretical analyses have been forthcoming most of the theoretical analyses either in the form of overlapping generations models 9 11 or simpler life cycle models 6 15 have indicated that unless specific parameter values utility functions and in some cases production functions are chosen the effect of a social security system on saving is indeterminate for example kurz 11 has shown that the introduction of a simple pay as you go social security system in an overlapping generations model in which individuals do not have a leisure choice will not have a predictable effect on the steady state level of the capital stock unless parameter values and the form of the production function are known similarly in life cycle models that include a leisure choice the effect of social security is difficult to determine although feldstein 6 shows that when the leisure choice is suppressed in such a model a social security system will have a negative impact on saving this indeterminacy has not been completely resolved by empirical work although the bulk of evidence 7 8 10 12 tends to support the view that social security has depressed saving in the past unfortunately with the exception of the work of sheshinski and weiss 16 little of the theoretical analysis deals with the effect on saving behavior of participants who are faced with uncertainty about future prices wages and social security benefits sheshinski and weiss have shown that in an overlapping generations model with uncertain lifetimes the effect of increasing the role of social security through balanced increases in benefits and contributions will actually lead to an increase in saving their analysis however does not include a leisure choice nor does it deal with other forms of uncertainty facing participants consequently we still lack more complete answers to the following basic questions will the introduction of a social security program in the presence of uncertainty

the effects of pensions on household wealth a reevaluation of theory and evidence this paper examines the extent to which households offset pension wealth with reductions in other wealth systematic econometric biases imply that the estimated offsets in previous empirical studies are smaller than the true offset and may even have the wrong sign new empirical estimates that do not correct for the biases generate little offset between pensions and other wealth estimates that correct for the biases show substantially more offset a smaller impact of pensions on overall saving than in most previous studies the estimates also indicate that the effects of pensions on wealth vary significantly across households

an empirical investigation of advertising strategies in a dynamic duopoly the equilibrium profit maximizing advertising policies of firms operating in a dynamic duopoly are derived by linking in a single framework the econometric estimation of the market response function and the technique of differential games that characterizes dynamic competitive behavior we use the lanchester model of combat to represent the system dynamics that capture the competitive shifts due to investments in advertising by the two market rivals we determine the equilibrium advertising levels using both closed and open loop policies we also compare these equilibrium advertising policies for each firm to those obtained using an optimal control theory formulation wherein the advertising spending levels of the rival are assumed to be known the empirical results obtained by analyzing the advertising rivalry between coke and pepsi for the period 1968 1981 under the above three alternative spending policies provide some interesting insights into the nature of competition between these two market rivals a significant contribution of this paper is to extend the existing literature on advertising competition by integrating theoretical and empirical analyses

declining public pensions in an era of demographic ageing will private provision fill the gap abstract demographic crisis and imprudent commitments have induced a crisis in public pension programmes in oecd countries will present and prospective cutbacks lead to greater private saving either in the form of private pension provision or in other forms of saving the paper surveys existing evidence and provides new results on three questions do individuals substitute private for public provision of savings when public pension programmes are cut back voluntarily do individuals respond to incentives to join sponsored or tax subsidised arrangements if encouraged by the government and if individuals are prepared to make such arrangements and where saving is voluntary do they save enough to replace previous prospective public pension flows

uncertain lifetime consumption and dissaving in retirement this paper asks whether the continued accumulation or mild dissaving observed among the retired can be explained by uncertain lifetime in the absence of annuities after an initial period influenced by borrowing constraints under constant relative risk aversion uncertain lifetime depresses consumption by a proportion increasing with age if the elasticity of intertemporal substitution in consumption is small illustrative computations based on actual income and survival data show that plausible elasticities are sufficiently small to give this effect the reduction in consumption is large enough to explain much of the lack of decumulation by the elderly

markov perfect equilibrium advertising strategies of lanchester duopoly model a technical note we propose a numerical approach to compute stationary markov perfect nash equilibrium advertising strategies of the lanchester model the algorithm can be implemented using a standard mathematical package and importantly it does not require that the players discount their future earnings at a zero rate an assumption that has been made in the literature

recent developments in dynamic advertising research a variety of continuous time differential functions have been developed to investigate dynamic advertising problems in business and economics fields since major dynamic models appearing before 1995 have been reviewed by a few survey papers we provide a comprehensive review of the dynamic advertising models published after 1995 which are classified into six categories i nerlove arrow model and its extensions ii vidale wolfe model and its extensions iii lanchester model and its extensions iv the diffusion models v dynamic advertising competition models with other attributes and vi empirical studies for dynamic advertising problems for each category we first briefly summarize major relevant before 1995 models and then discuss major after 1995 models in details we find that the dynamic models reviewed in this paper have been extensively used to analyze various advertising problems in the monopoly duopoly oligopoly and supply chain systems our review reveals that the diffusion models have not been used to analyze advertising problems in supply chain operations which may be a research direction in the future moreover we learn from our review that very few publications regarding dynamic advertising problems have considered the supply chain competition we also find that very few researchers have used the diffusion model to investigate the dynamic advertising problems with product quality as a decision variable and the pricing decision has not been incorporated into any extant lanchester model the paper ends with a summary of our review and suggestions on possible research directions in the future

the impact of public pensions on personal retirement saving in canada some evidence from cross section data during recent years much attention has been focused on the question of whether or not public retirement income systems have an adverse effect on personal saving the concern has been expressed in a number of countries that if there is any reduction in saving it could result in a lower rate of capital accumulation and as a consequence slower productivity growth unfortunately the theoretical literature on the subject is inconclusive within the framework of a life cycle model where saving and retirement decisions are made jointly the overall effect of public pensions is ambiguous depending on the relative strengths of the wealth replacement effect and the induced retirement effect 9 10 the former effect reduces saving while the latter tends to increase it the issue is further complicated by the possibility that individuals might attempt to vitiate what the public pension system does through offsetting changes in private intergenerational transfers in the form of bequests 1 14 it would appear therefore that only empirical evidence can determine the extent to which public pensions affect personal saving whereas in the united states a great deal of research much of it with conflicting results has been devoted to shedding further light on this very important issue in canada the subject has been somewhat neglected what little evidence there is however lends little support to the popular view that public pension programs such as old age security oas and the canada pension plan cpp have had a negative effect on saving boyle and murray in their recent study conclude from time series regressions that canada s public pension plans have had no visible effect on household savings behaviour 2 467

empirical analysis of closed loop duopoly advertising strategies closed loop perfect equilibria in a lanchester duopoly differential game of advertising competition are used as the basis for empirical investigation two systems of simultaneous nonlinear equations are formed one from a general lanchester model and one from a constrained model two empirical applications are conducted in one involving coca cola and pepsi cola a formal statistical testing procedure is used to detect whether closed loop equilibrium advertising strategies are used by the competitors rather than open loop strategies in the second application involving anheuser busch and miller the general model is estimated results indicate that closed loop equilibria better explain dynamic advertising competition than do open loop equilibria also closed loop equilibrium advertising strategies implied by model estimates show that competitive advertising levels may or may not be monotonic in market share