buffer stocks and precautionary savings with loss aversion abstract this paper reexamines buffer stocks and precautionary savings in the presence of loss aversion we assume that agents are disappointment averse as in gul econometrica 59 1991 667 686 we show that the concavity of the marginal utility continues to determine precautionary saving but its effect is of a second order magnitude proportional to the square of the coefficient of variation compared to the first order effect proportional to the coefficient of variation induced by loss aversion we show that a stabilization fund that is rather small when agents are maximizing the conventional expected utility turns out to be rather large with loss aversion

integrated regressors and tests of the permanent income hypothesis abstract we use recent research on estimation and testing in the presence of unit roots to argue that hall s 1978 t and f tests of whether consumption is predicted by lagged income or by lags of consumption beyond the first are asymptotically valid a monte carlo experiment suggests that the asymptotic t and f distributions provide a good approximation to the actual finite sample distribution

volatility and investment interpreting evidence from developing countries we uncover a significant negative correlation between various volatility measures and private investment in developing countries even when adding the standard control variables no such correlation is uncovered when the investment measure is the sum of private and public investment spending indeed public investment spending is positively correlated with some ineasures of volatility these findings suggest that the detrimental impact of volatility on investment may be easier to detect using disaggregated data we provide several possible interpretations for our findings nonlinearities in preferences or budget constraints can cause volatility to have first order negative effects on private investment

budget constraints and time series evidence on consumption is consumption more or less variable than predicted by the permanent income hypothesis pih to answer that question i develop a procedure based on a long run restriction implied by the consumer s intertemporal budget constraint in contrast to previous work the approach here i does not require any assumptions on the stochastic properties of labor income ii does not impose restrictions on the consumer s information set and iii is robust to departures from the pih model the application of the procedure to postwar u s data suggests that consumption is smoother than the pih model predicts jel 131

the political economy of public savings and the role of capital mobility abstract this paper explains public saving and investment in economies where many groups compete for scarce public funds we show that there is a collective action problem if there is no strong center then this problem manifests itself in a very low savings and investment rates in the extreme current spending may be determined simply by the current tax income and access to borrowing this explains why in the face of a temporary boom governments may not save but may even borrow more to finance even higher levels of expenditure we deal also with several mitigating factors repetition insiders outsiders interaction elections

the role of market forces in assuring contractual performance the conditions under which transactors can use the market repeat purchase mechanism of contract enforcement are examined increased price is shown to be a means of assuring contractual performance a necessary and sufficient condition for performance is the existence of price sufficiently above salvageable production costs so that the nonperforming firm loses a discounted steam of rents on future sales which is greater than the wealth increase from nonperformance this will generally imply a market price greater than the perfectly competitive price and rationalize investments in firm specific assets advertising investments thereby become a positive indicator of likely performance

testing the response of consumption to income changes with noisy panel data this paper tests the rational expectations lifecycle model of consumption against i a keynesian model and ii the rational expectations lifecycle model with imperfect capital markets the tests are based upon the relative responsiveness of consumption to income changes that can be predicted from past information and income changes that cannot he predicted the tests allow for measurement error in income the results reject the keynesian model and generally support the lifecycle model but the results are not sufficiently precise to rule out the possibility that some households are liquidity constrained measurement error has a strong influence on the relationship between consumption and income

how important is precautionary saving we estimate how much of the wealth of a sample of psid respondents is held because some households face more income uncertainty than others we begin by solving a theoretical model of saving which we use to develop appropriate measures of uncertainty we then regress measures of wealth on our measures of uncertainty and find evidence that households engage in precautionary saving finally we simulate the wealth distribution that our empirical results imply would prevail if all households had the same uncertainty as the lowest uncertainty group we find that between 39 and 46 percent of wealth in our sample is attributable to the extra uncertainty that some consumers face compared to the lowest uncertainty group

household saving micro theories and micro facts in this survey we review the recent theoretical and empirical literature on household saving and consumption the discussion is structured around a list of motives for saving and how well the standard theory captures these motives we show that almost all of the motives for saving that have been suggested in the informal saving literature can be captured in the standard optimizing model particular attention is given to recent work on the precautionary motive and its implications for saving and consumption behavior we also discuss the behavioral or psychological approach that eschews the use of standard optimization techniques and focuses instead on direct consideration on saving we provide a section on facts who save and how much we then discuss informally the recent decline in the u s saving rate and whether the theory is of much use in understanding this and other changes in aggregate saving rates over time we do not find any convincing explanation for the change in saving rates we also discuss some analyses of saving behavior over the life cycle addressing such questions as whether households save enough for retirement and whether the consumption patterns of older households can be rationalized within a simple life cycle model we also review a great number of studies of the consumption euler equations based on our analysis of the studies cited we conclude that there is still mixed evidence that consumption is excessively sensitive to income we also examine in depth the recent empirical literature on the precautionary motive we conclude that although some households do seem to have a significant precautionary motive at some points in their life cycle this motive is not so strong empirically as some investigators suggest

is consumption too smooth long memory and the deaton paradox under common arima representations of income the permanent income hypothesis predicts that the volatility of consumption should be larger than the volatility of unanticipated shocks to income this prediction is not supported by the data the authors examine whether this apparent excess smoothness of consumption is the result of the arima representation s implicit restrictions on low frequency dynamics by using a generalized long memory stochastic representation the authors construct confidence intervals for the long run impulse response of income in the absence of such low frequency restrictions these intervals are quite wide and include regions in which excess smoothness vanishes copyright 1991 by mit press

permanent and transitory movements in labor income an explanation for excess smoothness in consumption many have argued that if labor income is difference stationary the permanent income hypothesis predicts that consumption should be relatively volatile in u s aggregate data labor income is well characterized as having a unit root however consumption turns out to be relatively smooth this anomaly is known as deaton s paradox i resolve deaton s paradox by providing decompositions of labor income into permanent and transitory components these preserve the univariate dynamic properties of labor income however when agents distinguish permanent and transitory movements in their labor income as the rational expectations hypothesis asserts they should the permanent income hypothesis correctly predicts the observed smoothness in consumption

on being honest and behaving honestly abstract this paper deals with markets with asymmetric information where transactions are repeated infinitely it adds to the standard analysis the requirement that the equilibrium be renegotiation proof rp we show that when there are just one buyer and one seller there is no price that supports an rp equilibrium when there are many buyers and sellers the minimum of the price that supports a no cheating rp equilibrium approaches infinity as the probability that an entering firm will find buyers approaches 1 nonetheless the market is saved if the probability that a particular seller is honest is strictly positive the core of honest sellers imposes honest behavior on everybody else

precautionary saving motives an assessment from uk time series of cross sections this paper gauges the strength of precautionary saving motives by estimating the coefficient of prudence from the u k family expenditure survey data set a time series of cross sections the instrumental variables estimates reveal that greater uncertainty systematically leads to larger current savings most of these impacts are large enough to be statistically consistent with widely accepted beliefs about attitudes towards risk so that precautionary saving behavior cannot be refuted moreover the households which are less likely to face liquidity constraints or to share risks are more sensitive to uncertainty finally the households for which the head works in the manufacturing industry are more inclined to self insure against uncertainty copyright 1996 by royal economic society

aggregate stochastic implications of the life cycle hypothesis this paper sets forth some key aggregate stochastic implications of the modigliani brumberg 1980 life cycle hypothesis and explores the extent to which a properly aggregated life cycle model can help to explain the first and second moment properties of changes in per capita consumption the principal finding of the paper which to my knowledge is new is that smooth per capita consumption in the presence of permanent shocks to per capital labor income is exactly the outcome one should expect from a properly aggregated life cycle model in which saving for retirement as well as for consumption smoothing is a motive for asset accumulation

a theory of disappointment aversion an axiomatic model of preferences over lotteries is developed it is shown that this model is consistent with the allais paradox includes expected utility theory as a special case and is only one parameter beta richer than the expected utility model allais paradox type behavior is identified with positive values of beta preferences with positive beta are said to be disappointment averse it is shown that risk aversion implies disappointment aversion and that the arrow pratt measures of risk aversion can be generalized in a straight forward manner to the current framework copyright 1991 by the econometric society

the dissipation of profits by brand name investment and entry when price guarantees quality two previous models of the dissipation of profits generated by the use of quality guaranteeing prices assumed that pro fits were dissipated through investment in brand name capital and ent ry the model of this paper allows both possibilities it is shown th at both types of dissipation will in general occur and that brand n ame investment will dissipate a greater share of profits as the elast icity of consumer response to brand name investment grows larger copyright 1987 by university of chicago press

finite horizons life cycle savings and time series evidence on consumption abstract this paper develops an explicitly aggregated life cycle model which allows for finite horizons and declining individual labor supply the model can generate a common upward trend in aggregate consumption labor income and nonhuman wealth without relinquishing hall s random walk at the micro level life cycle factors are shown to imply that consumption changes should be a predictable and b smoother than in the infinite horizon model econometric evidence using postwar u s data suggests that neither consumption s predictability nor its excess smoothness can be fully accounted for by life cycle considerations

investment in new activities and the welfare cost of uncertainty abstract recent literature has shown that trade distortions are associated with first order costs stemming from the induced drop in the formation of new activities we demonstrate that uncertainty may induce similar welfare costs and that these costs apply also to a closed economy this argument is illustrated in romer s model of a dependent economy where foreign direct investment is needed to enable the importation of capital goods and intermediate products used in domestic production we show that knightian uncertainty inhibits the formation of new activities leading to first order losses whereas risk aversion alone leads to second order losses

savings and the terms of trade under borrowing constraints the authors examine the extent to which permanent terms of trade shocks have an asymmetric effect on private savings using a simple three period model they show that if households expect to face binding constraints on borrowing in bad states of nature when the economy is in a long trough rather than a sharp peak savings rates will respond asymmetrically to favorable movements in the permanent component of the terms of trade in contrast with the predictions of conventional consumption smoothing models they test the asymmetric effects of terms of trade disturbances using an econometric model that controls for various standard determinants of private savings the results based on panel data for non oil commodity exporters of sub saharan africa for 1980 96 a group of countries for which movements in the terms of trade have traditionally represented a key source of macroeconomic shocks indicate that increases in the permanent component of the terms of trade measured using three alternative filtering techniques indeed tend to be associated with higher rates of private savings

the demand for international reserves and exchange rate adjustments thecase of ldcs 1964 1972 in this paper the relationship between the demand for international reserves and exchange rate adjustments is empirically investigated for agroup of ldc s it is shown that countries that have maintained a fixed exchange rate for a long period of time have a different demand function than countries that have occasionally used exchange rate adjustments for correcting payments imbalances the dynamics of the adjustment for both groupsof countries are also analyzed the results show that while both groups tend to eliminate reserve disequilibria fast those countries that have maintained a fixed rate tend to do it more slowly than countries that have occasionally devalued their currency it is also shown that the year prior to a devaluation international reserves have been on average 30 below their short run desired level these results are important since they indicate that not all ldc s should be aggregated for prediction purposes the results also have implications for the analysis of the adequacy of international reserves in less developed countries this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract wa this abstract was borrowed from another version of this item

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

loss aversion in a consumption savings model abstract we propose a model of consumption and saving based on kahneman and tversky s prospect theory that implies a fundamental asymmetry in consumption behavior inconsistent with other models of consumption when there is sufficient income uncertainty a person resists lowering consumption in response to bad news about future income this resistance is greater than the resistance to increasing consumption in response to good news we present empirical evidence from five countries that confirms this behavior

optimal pricing against a simple learning rule abstract the paper studies a repeated buyer seller relationship under asymmetric information instead of assuming game theoretic rationality it is assumed that the buyer uses a nonstrategic learning rule to update his beliefs the seller s optimal pricing policies against this rule are analyzed it is shown that screening behavior emerges as a result of the seller s long run optimization problem although this is not a nash equilibrium of the one shot game moreover despite its apparent naivete the simple rule is optimal for the buyer in the sense that the seller cannot extract more from the buyer than the value of the stream of goods delivered

on the instability of long run money demand and the welfare cost of inflation in the united states we evaluate the policy implications of measuring the welfare cost of inflation accounting for instabilities in the long run money demand for the u s over the period 1900 2013 we extend the analysis and reassess the results reported in lucas 2000 and ireland 2009 also considering the recent theoretical contributions of lucas and nicolini 2015 and berentsen et al 2015 breaks in the long run money demand give rise to regime dependent welfare cost estimates we find that the welfare cost is about 0 1 of annual income over 1976 2013 as compared to 0 8 over 1945 1975 overall these values are substantially lower than those reported in the literature

saving and liquidity constraints this paper is concerned with the theory of saving when consumers are not permitted to borrow and with the ability of such a theory to account for some of the stylized facts of saving behavior the models presented in the paper seem to account for important aspects of reality that are not explained by traditional life cycle models copyright 1991 by the econometric society

bliss levels that aren t in an often cited paper hall 1978 observed that under rational expectations and the life cycle permanent income hypothesis the first order condition for utility maximization implies that the marginal utility of consumption follows a random walk if single period utility is quadratic that is if u ct 5 b ct 2 where ct is time t consumption and u is utility then consumption itself follows the random walk c a bc 1 et if true utility is not quadratic it may still be approximated by a quadratic in this model b is the ratio of one plus the rate of time preference for utility to one plus the interest rate and a 1 b b the parameter b is interpreted as the bliss level of consumption because utility takes on its maximum value when c b this utility function is undefined for c b because marginal utility is negative at these consumption levels given estimates of a and b the corresponding bliss level is simply obtained using b a 1 b yet authors who employ hall s methodology and quadratic utility have not calculated b their oversight is corrected here using real per capita u s consumption of services and nondurables hall estimates a 14 and b 1 011 0 003 standard errors are in parentheses these numbers imply a bliss level of b 1 270 while c is in the range of 2 000 4 000 hall actually gave the estimate of a as 0 0 14 but his data were in thousands for consumption of durable goods mankiw 1982 uses hall s methodology to derive the model ct ad bct1 et d 1 et1 where ct is real per capita u s consumption of durables and d is the rate of depreciation of durable capital setting d 1 mankiw estimates a 2 65 5 04 and b 1 002 0 011 which implies a bliss level of b 1 325 when d is estimated along with the other parameters mankiw finds ad 4 37 3 49 b 1 015 0 011 and

information aggregation bias aggregation in the presence of data processing lags distorts the information content of data violating orthogonality restrictions that hold at the individual level though the phenomenon is general it is illustrated here for the life cycle permanent income model cross section and pooled panel data induce information aggregation bias akin to that in aggregate time series calculations show that information aggregation can seriously bias tests of the life cycle model on aggregate time series cross section and pooled panel data copyright 1992 by american economic association

optimal saving rules for loss averse agents under uncertainty abstract most empirical studies assume only monotonic preferences for households behavioral research however provides substantial evidence that preferences for wealth are measured relative to a reference point in this paper we introduce and solve a two period consumption and savings model for a loss averse agent who measures utility from consumption relative to a benchmark level the solution is given as a parametric decision rule with one unknown parameter that depends on the distribution of the return on saving we find non linearity in the fraction of wealth saved where the specific saving pattern depends on the sign of the real return on savings the amount of saving is nondecreasing in initial wealth and the riskiness of the return distribution

trends random walks and tests of the permanent income hypothesis abstract recent studies find that consumption is excessively sensitive to income these studies assume that income is stationary around a deterministic trend the data however do not reject the hypothesis that disposable personal income is a random walk with drift if income is indeed a random walk then the standard testing procedure is greatly biased toward finding excess sensitivity moreover if income follows either a more general non stationary process or a borderline stationary process this procedure is also seriously biased

demand for money in thailand after a brief review of recent literature new estimates on a long run of annual observations of the thai demand for all the standard measures of money are presented the results demonstrate that the demand for real money balances is a stable function of a scale variable and a coherent measure of opportunity cost with all the properties predicted by economic theory

social security national policies with international implications social security policies within individual countries are determined independently by national governments but the resulting outcome is inefficient compared with what would result from the international co ordination of policies this is because national social security policies produce international externalities via their effects on world interest rates an illustrative example suggests that the gains from co ordination are potentially significant virtually all countries operate social security or redistributive policies each chooses policies independently and to my knowledge no one either in a policymaking context or in the large literature on international policy co ordination has suggested that such decisions would benefit from international coordination 1 however a simple argument suggests that independent national social security policies are inefficient more specifically in the long run national governments make policy decisions which are too egalitarian this holds provided that social security lowers national saving in this case each national government faces a trade off between income redistribution and national saving and can be assumed to locate at the nationally optimal point on this trade off taking as given the world interest rate the latter is clearly not independent of the combined effect of all countries policies however if all countries expand social security the resulting fall in world saving will raise the world interest rate with adverse consequences for each national economy each country rationally ignores its own small contribution to the global outcome if this international externality were internalised by co ordination countries would relocate on the trade off between income redistribution and national saving demonstrating the existence of an externality says nothing about its quantitative significance i address this with an example which focuses on pay as you go payg retirement pensions in an economy with a mixture of forward looking and myopic individuals the pensions prevent destitution among retired myopes and thus effectively redistribute life time welfare but they also lower saving because of payg financing for all parameter values considered international co ordination of pensions policy decisions generates welfare gains which are larger for many parameter values substantially larger than recent estimates of the welfare gains from either the entire elimination of all cyclical fluctuations or the reduction of inflation and nominal interest rates from suboptimally high to optimal levels hence the issues addressed in the paper are quantitatively significant when judged against other frequently advocated i am grateful to two anonymous referees for helpful comments on earlier versions they are not responsible for the present version

why is consumption so smooth for thirty years it has been accepted that consumption is smooth because permanent income is smoother than measured income this paper considers the evidence for the contrary position that permanent income is in fact less smooth than measured income so that the smoothness of consumption cannot be straightforwardly explained by permanent income theory the paper argues that in postwar u s quarterly data consumption is smooth because it responds with a lag to changes in income

optimal consumption and portfolio policies when asset prices follow a diffusion process abstract we consider a consumption portfolio problem in continuous time under uncertainty a martingale technique is employed to characterize optimal consumption portfolio policies when there exist nonnegativity constraints on consumption and on final wealth we also provide a way to compute and verify optimal policies our verification theorem for optimal policies involves a linear partial differential equation unlike the nonlinear partial differential equation of dynamic programming the relationship between our approach and dynamic programming is discussed we demonstrate our technique by explicitly computing optimal policies in a series of examples in particular we solve the optimal consumption portfolio problem for hyperbolic absolute risk aversion utility functions when the asset prices follow a geometric brownian motion the optimal policies in this case are no longer linear when nonnegativity constraints on consumption and on final wealth are included by these examples one can see that our approach is much easier than the dynamic programming approach

shoe leather costs reconsidered lucas has recently suggested that the shoe leather costs of inflation may amount to as much as 1 of gnp in the united states when moving to the friedman optimum we assess his thesis using empirical evidence for the united kingdom over the period 1870 1994 we find support for lucas proposition that interest rates should be specified in logs as a description of money demand dynamics but not as a steady state characterisation although lucas estimates can be corroborated a semilog interest rate specification implies smaller though still tangible welfare gain estimates for example 0 22 of gnp in perpetuity when moving from 6 to 2 nominal interest rates

precautionary saving and portfolio allocation dp by gmm abstract there is much research on consumption savings problems with risky labor income and a constant interest rate and also on portfolio allocation with risky returns but non stochastic labor income less is known quantitatively about the interaction between the two forms of risk under crra utility undiversifiable income risk should be reflected in both savings rates and portfolio allocations to quantify these effects in a model of consumption and portfolio choice we adopt a semi parametric projection method for solving dynamic programmes based on generalized method of moments estimation of the parameters of approximate decision rules we find that background income risk does affect optimal portfolios but that this effect may be difficult to detect empirically

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

sectoral money demand and the great disinflation in the united states estimates of the welfare costs of inflation based on bailey 1956 are typically computed using aggregate money demand models yet the behavior of money demand may vary across sectors thus the impact on welfare of inflation regime shifts may differ between households and firms we specifically investigate the sectoral welfare implications of the shift from the great inflation to the present regime of low and stable inflation for this purpose we estimate different functional specifications of money demand for u s households and nonfinancial firms using flow of fund data covering four decades we find that the benefits were significant for both sectors

the consumption function and the precautionary demand for savings abstract under the assumptions of constant absolute risk aversion and serially correlated normally distributed income shocks an explicit solution to the consumer s intertemporal optimization problem is derived which parameterizes the precautionary demand for savings

consumption puzzles and precautionary savings abstract when marginal utility is convex agents accumulate savings as a precautionary measure against labor income eventualities this paper shows that precautionary savings can go a long way in making the excess growth excess smoothness and excess sensitivity features of consumption consistent with the stochastic processes of labor income observed in the u s at the microeconomic level

if homo economicus could choose his own utility function would he want one with a conscience reply in my model of the evolution of honesty 1 i assumed the existence of a signal a blush perhaps extreme values of which served to identify some individuals as being honest with certainty joseph harrington notes that without this assumption honest individuals have difficulty invading a population initially dominated by defectors for readers who do not wish to work through the algebra in his comment the argument is easily summarized in nontechnical terms suppose two honest mutants a and b arrive in an uncountably large population consisting entirely of dishonest persons and suppose that the probability that an honest person exhibits an intense blush is say 0 999 while the corresponding probability for everyone else is only 0 001 when a sees an intense blush on the face of b what will then be his estimate of the probability that b is honest assuming that a knows the laws of elementary probability and corrects for the base rate of honest persons in the population it will be zero when virtually everyone in the population is dishonest even a person with an intense blush will be pegged as dishonest provided that even the smallest fraction of dishonest persons also shows an intense blush with

demand for international reserves in developing nations a quantile regression approach abstract i estimate the determinants of the demand for international reserves using quantile regressions employing a dataset of 108 developing nations over the period of 1980 2007 i find considerable differences at different points of the conditional distribution of reserves the estimates of elasticities that were found to be insignificant in ordinary least squares regressions become statistically significant at various quantiles of the distribution furthermore majority of the explanatory variables have lower coefficients for the nations that are located on the right tail of the conditional reserve distribution this finding shows that the level of reserves is as important as the other determinants of the demand for reserves

precautionary saving an explanation for excess sensitivity of consumption the permanent income hypothesis under certainty equivalence yields a martingale consumption process empirically this hypothesis is rejected because consumption is excessively sensitive to anticipated income one approach to account for excess sensitivity is to relax certainty equivalence by using utility functions that induce precautionary saving this article analyzes a hyperbolic absolute risk aversion utility function empirically some reasonable parameterizations of this specification allow one to match the excess sensitivity associated with the data these parameterizations also permit one to account for the excess smoothness problem excess sensitivity and excess smoothness however do not reflect the same phenomenon

time series implications of friedman s permanent income hypothesis abstract the ability of the permanent income hypothesis pih to explain aggregate time series data has been seriously challenged over the last ten years based upon the implications of a version of the pih developed by hall 1978 and flavin 1981 there are however inconsistencies between the hall flavin version of the pih and pure time series representations of the pih based upon friedman s original formulation this paper considers the force of the recent challenges to the pih when the implications of the pih are drawn from a friedman muth version of the pih rather than the hall flavin version

the welfare cost of inflation in general equilibrium abstract this paper presents a general equilibrium monetary model in which inflation distorts a variety of marginal decisions although individually none of the distortions is very large they combine to yield substantial welfare cost estimates a sustained 4 percent inflation like that experienced in the us since 1983 costs the economy the equivalent of 0 41 percent of output per year when currency is identified as the relevant definition of money and over 1 percent of output per year when m1 is defined as money the results illustrate how the traditional partial equilibrium approach can seriously underestimate the true cost of inflation

consumption and capital market imperfections an international comparison the excess sensitivity of consumption to current income fluctuations is higher in countries where consumers borrow less low levels of consumer debt can result either from capital market imperfections or from a low demand for loans the evidence suggests that the former view is more appropriate than the latter and thus supports the hypothesis that excess sensitivity may be attributed to liquidity constraints rather than to other factors copyright 1989 by american economic association

aggressive oil extraction and precautionary saving coping with volatility the effects of stochastic oil demand on optimal oil extraction paths and tax spending and government debt policies are analyzed when the oil demand schedule is linear and preferences quadratic without prudence optimal oil extraction is governed by the hotelling rule and optimal budgetary policies by the tax and consumption smoothing principle volatile oil demand brings forward oil extraction and induces a bigger government surplus with prudence the government depletes oil reserves even more aggressively and engages in additional precautionary saving financed by postponing spending and bringing taxes forward especially if it has substantial monopoly power on the oil market gives high priority to the public spending target is very prudent and future oil demand has high variance uncertain economic prospects induce even higher precautionary saving and if non oil revenue shocks and oil revenue shocks are positively correlated even more aggressive oil extraction in contrast prudent governments deliberately underestimate oil reserves which induce less aggressive oil depletion and less government saving but less so if uncertainty about reserves and oil demand are positively correlated

precautionary saving in the small and in the large the theory of precautionary saving is shown to be isomorphic to the arrow pratt theory of risk aversion making possible the application of a large body of knowledge about risk aversion to precautionary saving and more generally to the theory of optimal choice under risk in particular a measure of the strength of the precautionary saving motive analogous to the arrow pratt measure of risk aversion is used to establish a number of new propositions about precautionary saving and to give a new interpretation of the dreze modigliani substitution effect copyright 1990 by the econometric society

cross country evidence on the link between volatility and growth this paper presents empirical evidence against the standard dichotomy in macroeconomics that separates growth from the volatility of economic fluctuations in a sample of ninety two countries as well as a sample of oecd countries the authors find that countries with higher volatility have lower growth the addition of standard control variables strengthens the negative relationship the authors also find that government spending induced volatility is negatively associated with growth even after controlling for both time and country fixed effects copyright 1995 by american economic association

first order risk aversion and the equity premium puzzle abstract this paper integrates yaari s dual theory of choice under uncertainty into a multiperiod context and examines its implications for the equity premium puzzle an important property of these preferences is that of first order risk aversion which implies in our model that the risk premium for a small gamble is proportional to the standard deviation rather than the variance since the standard deviation of the growth rate in aggregate consumption is considerably larger than its variance the model can generate both a small risk free rate and a moderate equity premium