large deviations theorems for optimal investment problems with large portfolios the thrust of this paper is to develop a new theoretical framework based on large deviations theory for the problem of optimal asset allocation in large portfolios this problem is apart from being theoretically interesting also of practical relevance examples include inter alia hedge funds where optimal strategies involve a large number of assets in particular we also prove the upper bound of the shortfall probability or the risk bound for the case where there is a finite number of assets in the two assets scenario the effects of two types of asymmetries i e asymmetry in the portfolio return distribution and asymmetric dependence among assets on optimal portfolios and risk bounds are investigated we calibrate our method with international equity data in sum both a theoretical analysis of the method and an empirical application indicate the feasibility and the significance of our approach

factor and spread analysis of the convertible securities market factor decomposition demonstrates that during certain time periods the convertible market has offered excess returns over a well allocated bond equity portfolio moreover because the magnitude of these returns spans a wide range of values investors can use this valuation framework as a tool for estimating the relative attractiveness of convertibles compared with their underlying equity and fixed income components analysis of yield spreads demonstrates the changing nature of valuation levels embedded in convertible securities a factor analysis of a market weighted equity index underlying convertibles shows that their equity component is well diversified across two major dimensions value versus growth and large cap versus small cap

motivations for aid to developing countries abstract this paper attempts to identify the underlying principles of aid allocation and particularly the balance of motivations as between the needs of recipient countries and the interests of donor countries two alternative models are fitted by cross country regressions to bilateral and multilateral aid flows to some 80 developing countries in 1969 1970 and 1978 1980 the first recipient need model assumes that all aid is given to compensate for shortfalls in domestic resources this model provides a reasonable explanation for the distribution of multilateral aid but it is clearly not applicable for bilateral aid flows the second donor interest model assumes that all aid serves only donor interests defined to cover political security investment and trade interests this model gives generally good explanations of bilateral aid but is a poor fit for multilateral aid the relative importance of the various donor interests differs sharply among donors the paper ends with an analysis of the shift in the balance of aid over the 1970s towards the recipient need element and with a reference to the sharp change in policy in the 1980s towards increasing emphasis on donor interest aid

behavioral finance and its implications for stock price volatility an increasing number of academic and professional articles are being published about research on and potential applications of behavioral finance this article offers a more complete picture of the origin content and rationale behind this emerging area of study than previously presented in the process the traditional dominance in finance of the economic concepts of subjective expected utility and rationality are discussed in addition the article argues that the newer theories of chaos and adaptive decision making which have a place in behavioral finance can help explain the puzzle of stock price volatility

a lifetime portfolio of risky and risk free sexual behaviour and the prevalence of aids abstract a lifetime portfolio of risky and risk free sexual activities is conceptually constructed in this paper people s time allocation between risky and risk free sexual activities affects and is affected by the prevalence of aids a small satisfaction differential between risky and risk free sex can lead to a significant prevalence of aids numerical simulations suggest that the reduction in the prevalence of aids generated by a 1 improvement in the sensual quality of freely distributed condoms can be 0 855 when the initial satisfaction differential between risky and risk free sex is 50 or 0 464 when the initial satisfaction differential is 100

on the sensitivity of mean variance efficient portfolios to changes in asset means some analytical and computational results tbis paper investigates the sensitivity of meanvariance mv efficientportfolios to changes in the means of individual assets when only a budget constraint is imposed on the investment problem the analytical results indicate that an mv efficient portfolio s weights mean and variance can be extremely sensitive to cbanges in asset means when nonnegativity constraints are also imposed on the problem the computational results confirm that a positively weigbted mv efficient portfolio s weigbts are extremely sensitive to cbanges in asset means but the portfolio s returns are not a surprisingly small increase in the mean of just one asset drives balf the securities from the portfolio yet the portfolio s expected return and standard deviation are virtually uncbanged this paper supersedes should investors hold well diversified portfolios financial support from the natural science and engineering research council of canada is gratefully acknowledged we also acknowledge the most capable assistance of ruth cornale simon ng jean marc potier and frederick shen the paper was presented at simon fraser university and the western finance association meetings in san diego we thank the participants especially stephen brown john herzog john heaney ray koopman and bruce lehmann and the editors jon ingersoll and chester spatt for

the effects of education on financial outcomes evidence from kenya abstractwe study the effects of education on the financial outcomes of young people using kenya s introduction of free primary education fpe in 2003 as an exogenous shock to schooling our identi

a simultaneous approach to the estimation of risk aversion and the subjective time discount rate in this paper we analyze a sample of 1832 individuals who responded to six randomly generated lottery questions that differ with respect to chance prize and the timing of the draw using a model that explicitly allows for consumption smoothing we obtain an estimate of relative risk aversion of 82 instead assuming consumption to be immediate gives an estimate of 2 close to what is traditionally reported while a model of full asset integration gives estimates higher by several orders of magnitude our results show that estimated risk aversion is sensitive to the assumptions made with respect to the consumption profile and that it is possible to determine the level of asset integration endogenously the average subjective time discount rate which includes a preference for the present equals 6 percent per month it is found that both parameters vary strongly over individuals and that the variation can be explained by income age gender and entrepreneurship consistent with the majority of previous evidence

are you risk averse over other people s money decisions with uncertain outcomes are often made by one party in settings where another party bears the consequences whenever an individual is delegated to make decisions that affect others such as in the typical corporate structure does the individual make decisions that reflect the risk preferences of the party bearing the consequences we examine this question in two simple settings lottery choices and sealed bid auctions using controlled laboratory experiments we find that when an individual makes a decision for an anonymous stranger there is a tendency to exhibit less risk aversion this reduction in risk aversion is relative to his or her own preferences and it is also relative to his or her belief about the preferences of others this result has significant implications for the design of contracts between principals and agents

capital asset prices with and without negative holdings prize lecture to the memory of alfred nobel december 7 1990 this abstract was borrowed from another version of this item

individual preferences monetary gambles and stock market participation a case for narrow framing we argue that narrow framing whereby an agent who is offered a new gamble evaluates that gamble in isolation may be a more important feature of decision making than previously realized our starting point is the evidence that people are often averse to a small independent gamble even when the gamble is actuarially favorable we find that a surprisingly wide range of utility functions including many nonexpected utility specifications have trouble explaining this evidence but that this difficulty can be overcome by allowing for narrow framing our analysis makes predictions as to what kinds of preferences can most easily address the stock market participation puzzle

misconceptions about optimal equity allocation and investment horizon our analysis and results offer some resolution to a debate that has continued for 30 years we demonstrate that in contrast to prior claims no conflict exists between the implications of economic models of choice under uncertainty and a rational investor preference for larger equity allocations at longer investment horizons using examples of expected utility of wealth and mean variance utility we show that the effect of a longer horizon on risky asset allocation is consistent with increasing or decreasing optimal equity allocations even under the assumption of constant relative risk aversion

the nature of market growth risk and return in the model of asset appreciation advanced here the market economy and the market of asset claims on the economy are modeled as organic or exponential growth processes similar to those commonly seen in nature and the biological sciences in dempsey s organic growth model of appreciation dogma investors have a log wealth utility function within the framework the market risk premium is derived as the premium that balances supply and demand among risky and risk free assets the model indicates that the premium is less than is indicated by ex post returns observed on u s stock markets the model is consistent however with empirical observations that idiosyncratic risk and small company size are rewarded by the markets in terms of the model investors choose to allocate their portfolios long in both the risky market and the risk free asset furthermore their portfolios are independent of the investment time horizon

how much does honesty cost small bonuses can motivate ethical behavior although people generally try to avoid lying the lure of potential monetary payoffs often leads to unethical behavior the current research investigates whether small monetary rewards for honesty help people resist the temptations of larger incentives or whether they backfire and lead to even more dishonesty four experiments address these issues experiment 1 shows that a 1 bonus led people to act more honestly when they could have lied to obtain 4 an identical bonus however did not increase dishonesty experiment 2 uses a different context and again shows that a 1 bonus led people to act more honestly it also finds no evidence that this small payoff crowded out subsequent altruistic behavior experiment 3 shows that a 1 bonus increased people s honesty even when the payoffs for lying increased to 8 12 and 16 but not when the payoff for lying increased to 20 experiment 4 finds that smaller bonuses for honesty still had an impact although it tended to be somewhat weaker in addition com

a theory of anticipated utility abstract a new theory of cardinal utility with an associated set of axioms is presented it is a generalization of the von neumann morgenstern expected utility theory which permits the analysis of phenomena associated with the distortion of subjective probability

the motivating uncertainty effect uncertainty increases resource investment in the process of reward pursuit can a reward of an uncertain magnitude be more motivating than a reward of a certain magnitude this research documents the motivating uncertainty effect and specifies when this effect occurs people invest more effort time and money to qualify for an uncertain reward e g a 50 chance at 2 and a 50 chance at 1 than a certain reward of a higher expected value e g a 100 chance at 2 this effect arises only when people focus on the process of pursuing a reward not when they focus on the outcome the reward itself when the focus is on the process of reward pursuit uncertainty generates positive experience such as excitement and hence increases motivation four studies involving real rewards lend support to the motivating uncertainty effect this research carries theoretical implications for research on risk preference and motivation and practical implications for how to devise cost efficient consumer incentive systems

mental accounting access motives and overinsurance people exercising mental accounting have an additional motive for buying insurance they perceive a risk of having insu cient funds available to self insure in this way insurance protects the consumption value of the insured asset beyond the expenditure to acquire replace it this complements previous approaches based on probability weighting and loss aversion to explain the high pro tability of warranties and an aversion toward deductibles it helps to account for why the value of a warranty is found to be positively related to the value of the product and why there is seemingly contradictory empirical evidence on how household income a ects demand for warranties the adapted model rationalizes a strong aversion to deductibles and explains the observed sensitivity of this aversion to the insurance context finally it predicts a strong impact of how an insurer pays out bene ts on the value and cost of insurance this can explain both the evidence on strong deductible aversion for ood insurance and the lack of such evidence for long term care insurance jel classi cation d11 d14 d81 g22

on the risk of stocks in the long run a familiar proposition is that investing in common stocks is less risky the longer an investor plans to hold them if this proposition were true then the cost of insuring against earning less than the risk free rate of interest should decline as the investment horizon lengthens this paper shows that the opposite is true even if stock returns are mean reverting in the long run the case for young people investing more heavily than older people in stocks cannot therefore rest solely on the long run properties of stock returns for guarantors of money fixed annuities the proposition that stocks in their portfolios are a better hedge the longer the maturity of their obligations is unambiguously wrong

correlates of narrow bracketing we examine whether different phenomena of narrow bracketing can be traced back to some common characteristic and whether and how different phenomena are related we find that making dominated lottery choices or ignoring the endowment when making risky choices are related phenomena and are both associated with low levels of cognitive reflection in contrast the phenomena of setting narrow goals or narrow mental budgets seem not to reflect choice errors due to low cognitive reflection but are tools to overcome self control problems buying small scale insurance is associated with having narrow mental budgets suggesting that people buy such insurance to insure themselves against the consequences of their own self control strategy

robustness of bidder preferences among auction institutions i introduction the answer to the question of how bidders choose to enter one auction versus an alternative competing auction is important to understand in providing a complete picture of the nature of endogenous entry decisions into auctions the issue of how a bidder chooses which among alternative auctions to enter as well as whether to enter an auction at all is of substantial importance to auctioneers attempting to attract bidders to their auctions there is a growing literature addressing issues in endogenous entry in auctions there are several papers such as engelbrecht wiggans 1993 pevnitskaya 2004 and palfrey and pevnitskaya 2008 that consider the decision of whether to enter an auction or not and study the effect of endogenous entry on bidding behavior there is a much larger group for example harstad 1990 engelbrecht wiggans 1993 levin and smith 1994 mcafee 1993 and mcafee and mcmillan 1987 that considers competition between auctioneers in which the auctioneers are competing along some characteristic such as entry price we consider the case in which auctioneers may be competing with each other based on the choice of auction mechanism our interest is in the degree to which the auction mechanism itself might impact the entry decisions of potential bidders of course there would be a direct pecuniary impact of the mechanism in that bidders should be more likely to enter auction mechanisms that they believe allow them to get lower prices but there may be other cognitive issues in regard to the structure of the mechanism that may also impact the choice behavior in ivanova stenzel and salmon iss 2004a we introduced an experimental design aimed at eliciting and measuring preferences subjects might possess for different auction institutions and applied the design to testing bidder preferences between ascending a dynamic mechanism and sealed bid first price a static mechanism auctions it seems reasonable to expect bidders to have preferences between these two auction mechanisms due to the strategic differences between them in a first price auction the winner pays a price equal to his own bid whereas in the ascending auction he pays a price that is an increment above the second highest bid these differences might result in difficulty of deciding how to bid and in the possibility of experiencing some form of regret 1 the design involved having subjects make a choice between entering into a two bidder sealed bid first price auction versus a two bidder ascending auction each with different entry prices by varying the entry prices we could measure the subjects willingness to pay for either auction our main finding in the paper was that while subjects exhibited strong preferences for the ascending auction at equal entry prices they were not willing to pay up to the expected profit difference between the two auctions to participate in an ascending auction thus they ended up entering the supposedly less preferred sealed bid first price auction even in situations in which they would expect to make a higher net surplus including the cost of the entry fee by entering into the ascending auction instead that paper proposed one possible answer to the puzzle that involved assuming that bidders were risk averse in their bidding behavior and then risk averse to the same degree in their auction choice behavior this explanation worked because neither risk averse nor approximately risk neutral bidders should be expected to pay much to enter into an ascending auction instead of a sealed bid first price auction just as we observed in the experiment for the most risk averse bidders this is because while they bid the highest in the first price auction and therefore expected little surplus in the event that they win they consequently end up winning with higher probability than less risk averse bidders this is a trade off risk a verse bidders are willing to accept and consequently it is easy to show that highly risk averse bidders should not be willing to pay much to get into the more lucrative though risky ascending auction

return targets and percentile fans this article presents a highly intuitive approach for visualizing return distributions for a basic form of cash equity allocations this percentile fan framework can help clarify some of the key risk return trade offs in intuitive ways for a wide set of asset owners in particular percentile fans can help investors express their portfolio objectives in terms of return targets or shortfall limits over one or more horizons for some investors these intuitive goals especially when depicted in a visual context can feel like a more natural approach than the standard mean variance utility framework

the effect of myopia and loss aversion on risk taking an experimental test myopic loss aversion is the combination of a greater sensitivity to losses than to gains and a tendency to evaluate outcomes frequently two implications of myopic loss aversion are tested experimentally 1 investors who display myopic loss aversion will be more willing to accept risks if they evaluate their investments less often 2 if all payoffs are increased enough to eliminate losses investors will accept more risk in a task in which investors learn from experience both predictions are supported the investors who got the most frequent feedback and thus the most information took the least risk and earned the least money language en

making the implicit explicit a look inside the implicit discount rate implicit discount rates idrs are employed in energy models to capture household investment decisions yet the factors behind the idr and their respective implications for policy making usually remain blurred and fractional the proposed comprehensive framework distinguishes three broad categories of factors underlying the idr for household adoption of energy efficient technologies eets preferences notably over time risk loss debt and the environment predictable ir rational behavior bounded rationality rational inattention behavioral biases and external barriers to energy efficiency existing empirical findings suggest that the factors underlying the idrs that differ across household characteristics and technologies should be accounted for in energy models furthermore the framework allows for a fresh look at the interplay of idrs and policies we argue that a simple observation of high idrs or observing correlations between idrs and socio economic characteristics does not provide guidance for policy making since the underlying sources cannot be identified instead we propose that some of the factors underlying the idr notably external barriers can be changed through directed policy interventions whereas other factors notably preferences and predictable ir rational behavior are innate and can only be taken into account through reactive policy interventions

a micro econometric analysis of risk aversion and the decision to self insure this study estimates a von neumann morgenstern utility function using market data and micro econometric methods we investigate the decision whether to purchase insurance against the risk of telephone line trouble in the home using the choices of approximately 10 000 residential customers we determine the shape of the utility function and the degree of risk aversion we find that risk aversion varies systematically in the population and varies with the level of income and that the observed choice behavior is consistent with expected utility maximization we are unable to detect the presence of ambiguity effects or over weighting of low probability events

the value of private versus public risk and pure altruism an experimental economics test in 1996 johannesson et al published a paper entitled the value of private safety versus the value of public safety based on the preliminary evidence from a hypothetical contingent valuation study for public and private safety these authors argue that consumers behave as pure altruists who consider the cost of a program that might be imposed on other voters when they determine their maximum willingness to pay for public safety programs the authors conclude that further empirical research in this area is warranted this article presents a set of laboratory economics experiments to test johannesson et al s conjecture under controlled conditions in which participants face an actual risk of financial loss the laboratory results extend those of johannesson et al s providing strong evidence of pure altruism in coercive settings involving public risks

on the risk of stocks in the long run a resolution to the debate in response to the ongoing debate in this journal about whether the risk of investments in the stock market is increased or decreased by lengthening the investment period we show that bodie s attempt to identify market risk with the price of put options leads to a circular argument within the workings of arbitrage free option pricing models thus bodie failed to rebut the conventional view that longer investment horizons may be thought of as less risky bodie s put option prices are relevant however to determining market prices of stock investment insurance

the economic importance of financial literacy theory and evidence this paper undertakes an assessment of a rapidly growing body of economic research on financial literacy we start with an overview of theoretical research which casts financial knowledge as a form of investment in human capital endogenizing financial knowledge has important implications for welfare as well as policies intended to enhance levels of financial knowledge in the larger population next we draw on recent surveys to establish how much or how little people know and identify the least financially savvy population subgroups this is followed by an examination of the impact of financial literacy on economic decision making in the united states and elsewhere while the literature is still young conclusions may be drawn about the effects and consequences of financial illiteracy and what works to remedy these gaps a final section offers thoughts on what remains to be learned if researchers are to better inform theoretical and empirical models as well as public policy jel a20 d14 g11 i20 j26

expected utility violations implications for agricultural and natural resource economics nomic toolkit they compare the dogged defense of eu by economists to that of a monty python character playing the role of a petstore owner disputing the state of an obviously dead parrot the shop owner goes through incredible machinations to avoid replacing the bird let us consider another analogy the behavior of a caged parrot can likely tell us very little about the behavior of parrots in the wild a biologist may want to incorporate the behavior of caged parrots into the study of wild birds but would undoubtedly need to be extremely careful about understanding the underlying differences in the opportunities and constraints faced by caged versus wild birds before inferring much about wild parrot behavior to some extent experimental violations of eu present us with the same problem as the hypothetical parrot biologist subjects in these risk experiments are in a setting and are completing tasks very different from the setting and tasks they face in their everyday economic and social context what is missing relates to the power of the rationality assumption discussed in friedman that relies not only on the person s skill but also on the feedback they receive from the market friedman s expert billiards players are selected by a market because of their skill in billiards and th se are the players who fit friedman s as if description 1 risk researchers should not ignore experimental data however before we eliminate eu we should more fully understand the underlying reasons for the experimental behavior that violates eu agricultural and natural resource economists are well suited to assess

consistency of risk premium measures this research uses the results of a series of within sample experiments to elicit risk premium measures from agricultural producers results show that there is little consistency between measures in different contexts and using different elicitation methods suggesting that underlying risk preferences are not consistent these results highlight some of the difficulty with expected utility theory and risk measurement

asset allocation without unobservable parameters some asset allocation advice for long term investors is based on maximization of expected utility most commonly used investor utilities require measurement of a risk aversion parameter appropriate to the particular investor but accurate assessment of this parameter is problematic at best maximization of expected utility is thus not only conceptually difficult for clients to understand but also difficult to implement other asset allocation advice is based on minimizing the probability of falling short of a particular investor s long term return target or of an investable benchmark this approach is easier to explain and implement but it has been criticized by advocates of expected utility these seemingly disparate criteria can be reconciled by measuring portfolio returns relative to the target or benchmark and then eliminating the usual assumption that the utility s risk aversion parameter is not also determined by maximization of expected utility financial advisors should not be persuaded by advo

risk preferences and demand drivers of extended warranties we disentangle and study the relative importance of different risk preferences in explaining extended warranty purchases and the high premia paid for them empirical and behavioral research on insurance is at odds with whether diminishing returns curvature of the utility function or loss aversion and nonlinear probability weighting lead to observed consumer behavior this lack of consensus is primarily due to the inability of standard choice data to separate different risk preferences and the consequent need to rely on strong parametric assumptions we design two conjoint studies consistent with simultaneous and sequential decision making with choices about washing machines and extended warranties where subjects are given failure probabilities and repair costs using stated choice data from the surveys we can nonparametrically identify product and risk preferences we find that loss aversion is significantly more important than curvature and probability weights in explaining extended warranty choices importantly failure to decompose risk averse behavior into that arising from curvature loss aversion and probability weighting leads to lower washer prices and profits these findings are robust to alternate reference point assumptions we rationalize the premia paid for warranties by exploring retailer incentives to price discriminate and test the theory on complementary goods pricing finally based on counterfactual analysis forcing separate retailers to sell washers and extended warranties is not necessarily welfare enhancing as cited in the media and previous literature

inducing efficiency in the use of foreign aid the case for incentive mechanisms in this article we point out that one of the main problems in foreign aid allocation is the efficient use of these funds as resources available for foreign aid are intrinsically scarce their efficient use would be in the interest of donors and especially recipient countries the aim of this paper is to show how it is possible to design incentive schemes which by relating the allocation of aid to the way it is used may induce the recipient country to use these resources appropriately we discuss potential benefits and problems of different contractual forms showing how comparing the performances of different countries may help to design optimal incentive mechanisms finally we illustrate a proposal of performance conditioning of the grant element which may help in tackling the efficiency problem

the minimal impact of a large scale financial education program in mexico city abstract we conduct randomized experiments around a large scale financial literacy course in mexico city to understand the reasons for low take up among a general population and to measure the impact of this financial education course our results suggest that reputational logistical and specific forms of behavioral constraints are not the main reasons for limited participation and that people do respond to higher benefits from attending in the form of monetary incentives attending training results in a 9 percentage point increase in financial knowledge and a 9 percentage point increase in some self reported measures of saving but in no impact on borrowing behavior administrative data suggests that any savings impact may be short lived our findings indicate that this course which has served over 300 000 people and has expanded throughout latin america has minimal impact on marginal participants and that people are likely making optimal choices not to attend this financial education course

africa s education enigma the nigerian story abstract in the last two decades the social and economic benefits of formal education in sub saharan africa have been debated anecdotal evidence points to low returns to education in africa unfortunately there is limited econometric evidence to support these claims at the micro level in this study i focus on nigeria a country that holds 1 5 of africa s population i use instruments based on the exogenous timing of the implementation and withdrawal of free primary education across regions in this country to consistently estimate the returns to education in the late 1990s the results show the average returns to education are particularly low in the 90s in contrast to conventional wisdom for developing countries 2 8 for every extra year of schooling between 1997 and 1999 surprisingly i find no significant differences between ols and iv estimates of returns to education when necessary controls are included in the wage equation the low returns to education results shed new light on both the changes in demand for education in nigeria and the increased emigration rates from african countries that characterized the 90s

assessing consumer benefits in the ontario residential retail natural gas market ontario residential retail natural gas market why marketer entry did not help abstract when the institutions governing transactions in the energy sector changed in canada thirty years ago the changes were heralded as pro competitive for natural gas markets and subsequently authorities and some stakeholders have suggested that households would benefit from gas commodity marketer entry using an analysis of the institutions together with a model of the cost pass through regulatory process i show that households as a group would not benefit from purchasing the gas commodity from unregulated commodity marketers rather than buying it bundled with delivery from the regulated utility i next use monthly price data collected from the public web pages of these unregulated sellers to confirm the theoretical prediction depending on the time period five year natural gas contract commodity prices average more than 75 higher than the utility s regulated cost of gas on average over the sample period signing up meant paying over c 400 more for the gas commodity annually the analysis suggests that claims about the effects of policy change should be informed by a careful assessment of the specific institutional arrangements and the new incentives created by institutional evolution

spending on daughters versus sons in economic recessions although parents often try not to favor one child we examine whether specific environmental factors might bias parents to favor children of one sex over the other this research draws on theory in evolutionary biology suggesting that investment in female versus male offspring depends on resource availability applying this to consumers a series of experiments show that poor economic conditions favor resource allocations to daughters over sons for example poor conditions led people to bequeath more assets to girls in their will and to choose girls to receive a us treasury bond and a beneficial extracurricular activity it is proposed that this happens because spending on children represents a reproductive investment and that boys and girls relative reproductive value varies with economic conditions supporting this account perceptions of which child will have more children statistically mediates the effect of economic conditions on preferences for girls consequently the effect is strengthened as a child approaches reproductive age and it is moderated by individual differences risk aversion and monogamy directly related to our theoretical model this research contributes to the consumer behavior literature by revealing how why and when environmental factors influence spending on girls versus boys

an index of loss aversion to a considerable extent risk aversion as it is commonly observed is caused by loss aversion several indexes of loss aversion have been proposed in the literature the one proposed in this paper leads to a clear decomposition of risk attitude into three distinct components basic utility probability weighting and loss aversion the index is independent of the unit of payment the main theorem shows how the indexes of different decision makers can be compared through observed choices

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

risk sharing and transactions costs evidence from kenya s mobile money revolution we explore the impact of reduced transaction costs on risk sharing by estimating the effects of a mobile money innovation on consumption in our panel sample adoption of the innovation increased from 43 to 70 percent we find that while shocks reduce consumption by 7 percent for nonusers the consumption of user households is unaffected the mechanisms underlying these consumption effects are increases in remittances received and the diversity of senders we report robustness checks supporting these results and use the four fold expansion of the mobile money agent network as a source of exogenous variation in access to the innovation jel e42 g22 o16 o17 z13 in developing countries informal networks provide an important means by which individuals and households share risk though the insurance they provide is often incomplete economists have proposed a number of reasons for this incompleteness including information asymmetries which manifest in problems of moral hazard and limited commitment both of which induce positive correlations between realized income and consumption in this article we emphasize a complementary source of incompleteness transaction costs literally the costs of transferring resources between individuals we test the impact of transaction costs on risk sharing by analyzing data from a large panel household survey that we designed and administered in kenya over a three year period to capture the expansion of mobile money this financial innovation has allowed individuals to transfer purchasing power by simple short messaging service sms technology and has dramatically reduced the cost of sending money across large distances mobile money is a recent innovation in developing economies one of the first and most successful examples to date is kenya s m pesa 1 in just four years after its

on money pumps abstract the question of whether money pump arguments justify standard consistency assumptions about behavior has remained unresolved partly because of the absence of an appropriate analytical framework we present a new framework which fills this gap provide a formal definition of invulnerability to money pumps and formulate a requirement of maximal opportunism we show that behavior which satisfies none of the standard consistency assumptions can be both invulnerable and maximally opportunist we present two conditions which combined with maximal opportunism imply the existence of a choice function rationalized by an ordering and satisfying the sure thing principle journal of economic literature classification numbers b41 c73 d81

bidder preferences among auction institutions i introduction auctions have become a pervasive method of exchange in the online world as each day thousands of auctions take place online and this trade volume totals to billions of dollars worth of goods per year 1 this large volume of auction transactions implies the existence of a large number of sellers competing for buyers the obvious implication is that the competition among the sellers for the pool of potential buyers can be fierce and any competitive edge a seller can find could be important one such competitive edge a seller might exploit is using an auction design that attracts bidders away from their competitors when designing a real auction or modeling a theoretical one the entry decision of prospective bidders is rarely considered most auction analysis is performed assuming that a certain number of bidders will participate for certain or perhaps that the number of bidders is unknown and randomly determined it should be clear however that the most crucial part of a successful auction is encouraging as many bidders as possible to participate in general this should be expected to have a positive effect on revenue at least in noncommon value environments and in certain types of auctions it may help combat the possibility of bidder collusion because there are typically competing auctions available for similar goods or even outside options that bidders can pursue when auctions are for unique goods it is important to understand how the aspects of an auction format can effect the entry decision of a bidder consider a bidder who is faced with the choice of entering one of two auctions for similar or even identical objects how does this bidder make the decision of which auction to enter the obvious answer is that the bidder will enter into the auction that maximizes his or her expected utility so long as that expected utility is greater than some reservation value the real question then is how are these expected utilities constructed profit from participating in the auction is an obvious argument there are also a number of environmental considerations that might effect this decision that would be difficult to account for precisely such as the reputation and trustworthiness of the auctioneer quality of the advertisement for the auction and things of this nature it is also possible that the format of the auction itself can have an impact on the preferences of the bidder this latter point will be the issue of this study the particular focus will be looking at bidder preferences between the two most common standard auction formats used in the field the sealed bid first price will be abbreviated as just the sealed bid auction and the ascending or english auction the other reason we are interested in comparing these two auction formats rather than the ascending and second price or first price and descending is that it seems reasonable to expect bidders to have preferences between the two due to the strategic differences between them such differences lead to substantial differences in terms of the difficulty of deciding how to bid and also in the possibility that an outcome leads to a bidder experiencing some form of regret regret may occur in a first price auction when a bidder loses to a bid that is below his value as he may think that if only he had bid higher he could have won although such feelings of regret may be considered irrational that does not preclude their existence such a scenario should not reasonably occur in an ascending auction if one considers the situation of a bidder choosing between two auctions that differ only in regard to whether the auction is being conducted according to an ascending or sealed bid format it is not immediately obvious which would be the most preferred even assuming a standard symmetric independent private values environment were all bidders risk neutral then of course revenue equivalence would hold and the bidders would be indifferent

anomalies risk aversion economists ubiquitously employ a simple and elegant explanation for risk aversion it derives from the concavity of the utility of wealth function within the expected utility framework we show that this explanation is not plausible in most applications since anything more than economically negligible risk aversion over moderate stakes requires a utility of wealth function that is so concave that it predicts absurdly severe risk aversion over very large stakes we present examples of how the expected utility framework has misled economists and why we believe a better explanation for risk aversion must incorporate loss aversion and mental accounting

competition and price variation when consumers are loss averse we modify the salop 1979 model of price competition with differentiated products by assuming that consumers are loss averse relative to a reference point given by their recent expectations about the purchase consumers sensitivity to losses in money increases the price responsiveness of demand and hence the intensity of competition at higher relative to lower market prices reducing or eliminating price variation both within and between products when firms face common stochastic costs in any symmetric equilibrium the markup is strictly decreasing in cost even when firms face different cost distributions we identify conditions under which a focal price equilibrium where firms always charge the same focal price exists and conditions under which any equilibrium is focal

time diversification and estimation risk the recommendation that investors with long investment horizons tilt their portfolios toward stocks is commonplace we used a nonparametric bootstrap approach to investigate whether in a mean variance efficient portfolio the weights for u s stocks and u s t bills vary in a systematic manner with investment horizon this approach allowed us to analyze the impact of estimation risk on the optimal weights of stocks and fixed income securities the results show that an investor can gain from time diversification the weights for stocks in an efficient portfolio were significantly larger for long investment horizons than a one year horizon

terrorism the relevance of the rational choice model terrorism in general and suicidal terrorism in particular is popularly seen as irrational but many economists and political scientists argue otherwise this paper distinguishes three different senses of irrationality unresponsiveness to incentives deviation from narrow self interest and failure of rational expectations it concludes that an intermediate position on the rationality of terrorism is appropriate the typical terrorist sympathizer deviates only slightly from homo economicus but active terrorists arguably stray from narrow self interest and rational expectations and suicidal terrorists probably violate both deterrence remains a viable anti terrorism strategy but deviations from rational expectations increase the potential of persuasion and appeasement

the small sample bias of the gini coefficient results and implications for empirical research the gini coefficient is a downward biased measure of inequality in small populations when income is generated by one of three common distributions the paper discusses the sources of bias and argues that this property is far more general this has implications for i the comparison of inequality among subsamples some of which may be small and ii the use of the gini in measuring firm size inequality in markets with a small number of firms the small sample bias has often led to misperceptions about trends in industry concentration a small sample adjustment results in a reduced bias which can no longer be signed this remaining bias rises with the dispersion and falls with increasing skewness of the distribution finally an empirical example illustrates the importance of using the adjusted gini in this example it is shown that controlling for market characteristics larger shipping cartels include a set of firms that is stochastically identical in terms of relative size to those of smaller shipp

a portfolio performance index fund managers may sensibly be averse to earning a time averaged portfolio return that is less than the average return of some designated benchmark when a portfolio is expected to earn a higher average return than the benchmark return the probability that it will not approaches zero asymptotically at a computable exponential decay rate the probability decay rate is thus proposed here as a new portfolio performance index in the widely analyzed special case in which returns are normally distributed the new performance index maximizing portfolio is the same as the popular sharpe ratio maximizing portfolio the results of the two approaches generally differ however because of nonnormal levels of skewness and or kurtosis in the portfolio attributable to large asymmetrical economic shocks or investments in options and other derivative securities an illustrative example will show that the new index is easy to implement and consistent with empirical evidence on portfolio choice favors investments with

the time diversification controversy some financial theorists reject the widely held practitioner belief in time diversification the theorists argue that given serially uncorrelated returns holding a risky asset over longer periods of time will not reduce its inherent riskiness the argument is supported by references to economic models of risk aversion such as mean variance optimization and expected utility theory mean variance optimizers however are not indifferent to investment horizon and investment horizon indifference is only a special case within expected utility theory furthermore to the extent that models reject the notion of time diversification they are inadequate because they are inconsistent with common sense measures of risk at very long horizons

a human experiment on inventory decisions under supply uncertainty abstract controlled human experiments are adopted in this paper to investigate the impact of supply uncertainty on buyers inventory management the experiments aim at assessing the impact of one specific source of supply chain uncertainty namely stochastic lead times on inventory holdings and the extent of the bullwhip effect three experimental treatments are run within the framework of the beer game manipulating variability in demand and in lead times results confirm that the bullwhip effect arises in all experimental treatments and that the variance of orders is higher under stochastic lead times analysis of players behaviour in the course of the game suggests that players react to higher uncertainty by holding fewer inventories a behaviour consistent with the predictions of some psychological models of choice under ambiguity

rationality of choices in subsidized crop insurance markets the u s crop insurance market has several features that set it apart from other insurance markets these include explicit government subsidies with an average premium subsidy rate of about 60 in recent years and the legislative requirement that premium rates be set at actuarially fair levels where the federal government sets rates and pays all costs related to insurance policy sales and services bearing these features in mind we examine the extent to which farmers crop insurance choices conform to economic theory a standard expected utility maximization framework is constructed to analyze trade offs between higher risk protection and larger subsidy payments we decompose the effect of coverage level on expected utility into insurance premium loading and subsidy transfer effects where the loading effect vanishes if rates are actuarially fair given an actuarially fair premium we infer that a rational farmer should choose either the coverage level with the highest premium subsidy or a higher coverage level evidence from a large insurance unit level dataset contradicts this theoretical inference and so suggests anomalous insurance decisions in a novel application of the mixed logit framework we show that the probability an insurance product is chosen declines as out of pocket premium expenditures increase even though higher values of these expenditures should reflect improved grower welfare premium expenditures appear to be more salient than the uncertain future benefits they support we apply our regression to the recent trend yield adjustment innovation in crop insurance

contract cheating the market in essays we conduct the first empirical economic investigation of the decision to cheat by university students we investigate student demand for essays using hypothetical discrete choice experiments in conjunction with consequential holt laury gambles to derive subjects risk preferences students stated willingness to participate in the essay market and their valuation of purchased essays vary with the characteristics of student and institutional environment risk preferring students those working in a non native language and those believing they will attain a lower grade are willing to pay more purchase likelihoods and essay valuations decline as the probability of detection and associated penalty increase

cognitive imprecision and small stakes risk aversion observed choices between risky lotteries are difficult to reconcile with expected utility maximization both because subjects appear to be too risk averse with regard to small gambles for this to be explained by diminishing marginal utility of wealth as stressed by rabin 2000 and because subjects responses involve a random element we propose a unified explanation for both anomalies similar to the explanation given for related phenomena in the case of perceptual judgments they result from judgments based on imprecise and noisy mental representations of the decision situation in this model risk aversion results from a sort of perceptual bias but one that represents an optimal decision rule given the limitations of the mental representation of the situation we propose a quantitative model of the noisy mental representation of simple lotteries based on other evidence regarding numerical cognition and test its ability to explain the choice frequencies that we observe in a laboratory experiment

the political economy of conditionality an empirical analysis of world bank loan disbursements abstract traditional aid conditionality has been attacked as ineffective in part because aid agencies notably the world bank often fail to enforce conditions this pattern undermines the credibility of conditionality weakening incentives to implement policy reforms the standard critique attributes this time inconsistency to bureaucratic factors within the aid agency such as pressure to lend defensive lending or short sighted altruism pressure from powerful donors provides another potential explanation for lax enforcement this paper presents an empirical analysis of the political economy of conditionality in international organizations using the case of the world bank and the united states the analysis examines panel data on world bank disbursements to 97 countries receiving structural adjustment loans between 1984 and 2005 using un voting as an indicator of alignment with the u s the paper presents evidence that world bank structural adjustment loan disbursements are less dependent on macroeconomic performance in countries aligned with the united states

are risk preferences stable across contexts evidence from insurance data using a unique dataset we test whether households deductible choices in auto and home insurance reflect stable risk preferences our test relies on a structural model that assumes households are objective expected utility maximizers and claims are generated by household coverage specific poisson processes we find that the hypothesis of stable risk preferences is rejected by the data our analysis suggests that many households exhibit greater risk aversion in their home deductible choices than their auto deductible choices our results are robust to several alternative modeling assumptions jel d11 d83

the endowment effect and intertemporal choice a laboratory investigation we present a laboratory investigation of intertemporal choice i e elicited discount rates allowing for the influence of the endowment effect consistent with the previous literature we hypothesize that the endowment effect in an intertemporal choice setting results in substantially higher discount rates relative to when individuals treat the resources in question as found money our results support this hypothesis and our experimental design provides a new protocol for conducting choice experiments wherein the endowment effect is an important determinant of behaviour l effet de dotation et le choix inter temporel une analyse en laboratoire on presente une analyse en laboratoire de choix inter temporels i e de taux d escompte permettant a l effet de dotation de jouer selon les conventions dans la litterature specialisee on fait l hypothese que l effet de dotation dans un contexte de choix inter temporel resulte en des taux d escompte substantiellement plus eleves que quand les individus traitent les ressources comme de la monnaie trouvee les resultats supportent l hypothese et le design de l experience fournit un protocole pour mener des experiences de choix ou l effet de dotation est un determinant important du comportement

narrow bracketing and dominated choices an experiment by tversky and kahneman 1981 illustrates that people s tendency to evaluate risky decisions separately can lead them to choose combinations of choices that are first order stochastically dominated by other available combinations we investigate the generality of this effect both theoretically and experimentally we show that for any decisionmaker who does not have constant absolute risk averse preferences and who evaluates her decisions one by one there exists a simple pair of independent binary decisions where the decisionmaker will make a dominated combination of choices we also characterize as a function of a person s preferences the amount of money that she can lose due to a single mistake of this kind the theory is accompanied by both a real stakes laboratory experiment and a large sample survey from the general u s population replicating tversky and kahneman s original experiment where decisionmakers with prototypical prospect theory preferences will choose a dominated combination we find that 28 of the participants do so in the survey we ask the respondents about several hypothetical large stakes choices and find higher proportions of dominated choice combinations a statistical model that estimates preferences from the survey results is best fit by assuming people have utility functions that are close to prospect theory value functions and that about 83 of people bracket narrowly none of these results varies strongly with the personal characteristics of participants we also demonstrate directly that dominated choices are driven by narrow bracketing when we eliminate the possibility of narrow bracketing by using a combined presentation of the decisions the dominated choices are eliminated in the laboratory experiment and are greatly reduced in the survey

labor supply flexibility and portfolio choice in a life cycle model abstract this paper examines the effect of the labor leisure choice on portfolio and consumption decisions over an individual s life cycle the model incorporates the fact that individuals may have considerable flexibility in varying their work effort including their choice of when to retire given this flexibility the individual simultaneously determines optimal levels of current consumption labor effort and an optimal financial investment strategy at each point in his life cycle we show that labor and investment choices are intimately related the ability to vary labor supply ex post induces the individual to assume greater risks in his investment portfolio ex ante

risk aversion and wealth evidence from person to person lending portfolios we estimate risk aversion from investors financial decisions in a person to person lending platform we develop a method that obtains a risk aversion parameter from each portfolio choice since the same individuals invest repeatedly we construct a panel data set that we use to disentangle heterogeneity in attitudes toward risk across investors from the elasticity of risk aversion to changes in wealth we find that wealthier investors are more risk averse in the cross section and that investors become more risk averse after a negative housing wealth shock thus investors exhibit preferences consistent with decreasing relative risk aversion and habit formation data as supplemental material are available at http dx doi org 10 1287 mnsc 2015 2317 this paper was accepted by amit seru finance

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

are commercial fishers risk lovers fishers are risk averse according to most empirical studies while expected utility theory predicts risk neutrality even for sizable stakes we test this prediction using data from a stated choice experiment with swedish commercial fishers our results show that only 48 of the fishers can be broadly characterized as risk neutral while 26 are modestly risk averse and 26 are strongly riskaverse fishers are more risk neutral the higher the fraction of their household s income comes from fishing sensitivity testing implies that modest stake decisions like a few days of fishing are not influenced by wealth level

estimating risk preferences from deductible choice we develop a structural econometric model to estimate risk preferences from data on deductible choices in auto insurance contracts we account for adverse selection by modeling unobserved heterogeneity in both risk claim rate and risk aversion we find large and skewed heterogeneity in risk attitudes in addition women are more risk averse than men risk aversion exhibits a u shape with respect to age and proxies for income and wealth are positively associated with absolute risk aversion finally unobserved heterogeneity in risk aversion is greater than that of risk and as we illustrate has important implications for insurance pricing

a behavioral framework for time diversification the box of factors that we call risk is both too large and too small the box is large enough to include many sometimes conflicting measures of risk variance and semivariance probabilities of losses and their amounts but the box is too small to include factors that affect choices but fall outside the boundaries of risk frames and cognitive errors self control and regret we explore the role of these factors in time diversification the belief that time diversification reduces risk underlies the current drive to invest social security funds in stocks but is such investment prudent we discuss the role of advisors in providing prudent advice changes in the standards of prudence over time the use of time diversification in guiding investors to prudent portfolios and its use in the current debate on social security

risk rationality and time diversification the validity of the concept of time diversification is the subject of long running debate supporters of the concept argue that risk decreases as investment horizon increases detractors suggest that the concept is false on the face of it we argue that time diversification is consistent both theoretically and empirically with current conceptions of risk and rationality and we also note the implications of changes in investment horizon for stock market behavior

prices or knowledge what drives demand for financial services in emerging markets this brief summarizes the results of a gender impact evaluation study entitled prices or knowledge what drives demand for financial services in emerging markets conducted in 2008 in indonesia the study observed that financial development is critical for growth but its micro determinants are not well understood financial literacy training has no impact on the probability of opening a bank account although it does have an impact among those with low levels of education and financial literacy a change from 3 to 14 led to a 7 6 percent increase in the probability of owning a bank account the results hold two years after a study funding for the study derived from world bank hbs division of research and faculty development

what is the economic cost of the investment home bias overinvesting domestically is well known as an investment home bias ihb we define an economic home bias ehb whereby the ihb measures the investment weights and the ehb measures the economic cost induced by the ihb we may have a large ihb and a negligible ehb with the increase in the average correlation between foreign markets from 0 4 for the decade ending in 1988 to about 0 9 for more recent decades the u s ehb is becoming negligible despite the domestic investment of 77 5 since 2009 the correlations have decreased indicating that the hb puzzle is emerging once again

world bank environmental reform revisiting lessons from agency theory daniel nielson and michael tierney s article delegation to international organizations agency theory and world bank environmental reform international organization spring 2003 makes a strong argument for ways in which principalagent p a models advance theoretical explanations of the behavior and performance of international organizations ios most ios suffer from widely recognized gaps between their mandates and their performance gaps not well explained by the major theories in our field p a models are premised on the assumption that performance problems naturally arise when one actor the principal delegates to another actor the agent the authority to act in the former s interests the models seek to explain why and how the divergence of interests between the two parties may result in the agent s actions differing from the principal s intentions how agents may be better controlled and the costs of doing so the article is a straightforward application of the basic insights of the p a model to the case of the world bank s environmental behavior the authors want to explain what they identify as sudden and significant environmental reform at the bank in 1994 after previous bank reforms fell short of altering its behavior the authors argue that the successful reform efforts reflect the convergence of preferences among the bank s major member state principals and their use of a variety of screening oversight and contracting tools to reduce slippage between their interests and those of the bank staff agents the authors test their model by examining the bank s environmental behavior from 1980 2000 and use descriptive statistics to assess bank environmental lending behavior during the same period they conclude that a comparison of lending patterns in 1994 2000 with the 1987 93 period shows

rejecting small gambles under expected utility this paper contributes to an important recent debate around expected utility and risk aversion rejecting a gamble over a given range of wealth levels imposes a lower bound on risk aversion using this lower bound and empirical evidence on the range of the risk aversion coefficient we calibrate the relationship between risk attitudes over small stakes and large stakes gambles we find that rejecting small gambles is consistent with expected utility contrary to a recent literature that concludes that expected utility is fundamentally unfit to explain decisions under uncertainty paradoxical behavior is only obtained when calibrations are made in a region of the parameter space that is not empirically relevant

asset integration and attitudes to risk theory and evidence measures of risk attitudes derived from experiments are often questioned because they are based on small stakes bets and do not account for the extent to which the decision maker integrates the prizes of the experimental tasks with personal wealth we exploit the existence of detailed information on individual wealth of experimental subjects in denmark and directly estimate risk attitudes and the degree of asset integration consistent with observed behavior the behavior of the adult danes in our experiments is consistent with partial asset integration they behave as if some small fraction of personal wealth is combined with experimental prizes in a utility function and that this combination entails less than perfect substitution our subjects do not perfectly asset integrate the implied risk attitudes from estimating these specifications imply risk premia and certainty equivalents that are a priori plausible under expected utility theory or rank dependent utility models these are reassuring and constructive solutions to payoff calibration paradoxes in addition the rigorous structural modeling of partial asset integration points to a rich array of neglected questions in risk management and policy evaluation in important field settings

education and saving the long term effects of high school financial curriculum mandates abstract over the last 40 years a majority of states have adopted consumer education policies and a sizable minority have mandated that high school students receive instruction on topics related to household financial decision making in this paper we attempt to determine whether these mandates have had any effect on subsequent decisions we exploit the variation in requirements both across states and over time to identify the effects of interest the evidence indicates that mandates have raised both exposure to financial curricula and subsequent asset accumulation once exposed students reached adulthood the estimated effects are gradual probably due to implementation lags

an experiment on risk taking and evaluation periods does the period over which individuals evaluate outcomes influence their investment in risky assets results from this study show that the more frequently returns are evaluated the more risk averse investors will be the results are in line with the behavioral hypothesis of myopic loss aversion which assumes that people are myopic in evaluating outcomes over time and are more sensitive to losses than to gains the results have relevance for the equity premium puzzle and also for the marketing strategies of fund managers

timid choices and bold forecasts decision makers have a strong tendency to consider problems as unique they isolate the current choice from future opportunities and neglect the statistics of the past in evaluating current plans

risk aversion and expected utility theory a calibration theorem within the expected utility framework the only explanation for risk aversion is that the utility function for wealth is concave a person has lower marginal utility for additional wealth when she is wealthy than when she is poor this paper provides a theorem showing that expected utility theory is an utterly implausible explanation for appreciable risk aversion over modest stakes within expected utility theory for any concave utility function even very little risk aversion over modest stakes implies an absurd degree of risk aversion over large stakes illustrative calibrations are provided

risk preferences and expected utility evidence from labor supply data i introduction why do some people enjoy bungee jumping while others do not why do some individuals hold extensive insurance portfolios it is intuitive to attribute these differences between people to their individual preferences for risk a concept that is appealing but hard to quantify arrow 1965 and pratt s 1964 coefficient of relative risk aversion rra has been the standard risk measure since the mid 1960s it relies on expected utility theory eut and the fact that the utility function is concave over wealth although eut is still widely used in economics theorists are increasingly unsatisfied with its performance this is true when applied specifically to risk aversion as well for example rabin 2000 provides a calibration argument that shows that if an expected utility maximizer is not essentially risk neutral over a modest stakes gamble he will be unrealistically risk averse over a large risk gamble he concludes that aversion to modest stakes risk has nothing to do with the diminishing marginal utility of wealth 1282 a frequent argument for continuing to use eut despite failures of its axioms is that it adequately explains behavior an empirical measure of risk aversion that explains behavior is very desirable as risk preference plays an important role in many decisions of interest to economists using a labor supply regression and information on each individual s income and hours of work i compute a measure of risk aversion gamma sub ls that is the curvature of utility over wealth and compare this measure of risk aversion to one based on the individual s willingness to accept gambles over lifetime income go both should measure an individual s preferences for large scale risk while it has been well established that an individual s risk preferences with respect to both large and small scale risk cannot be adequately explained by eut comparing gamma sub g and gamma sub ls affords an opportunity to see how eut performs over gambles of the same scale if eut is a good predictive model for behavior under uncertainty individuals who have a very concave utility function as measured by gamma sub ls should be less willing to gamble with lifetime income than those with smaller values of gamma sub ls i find no correlation between the two measures implying that eut does not explain the variation in risk preferences as measured by a hypothetical gambling frame many economists have questioned whether hypothetical choices are a good proxy for actual decisions in the context of risk and perhaps the discrepancy in the two measures stems from this from a preliminary look at how these measures vary with actual risky choices it appears that the measure of the curvature of utility over wealth does a better job of explaining actual risky choices such as smoking and binge drinking and the hypothetical gambling frame does a better job explaining people s responses to other hypothetical risky situations this is of interest for theorists who are trying to find the new direction for choices under uncertainty but also for empiricists who wish to use risk preferences to explain decision making and behavior ii measuring risk aversion with labor supply data aside from concerns as to the validity of eut risk aversion can be difficult to measure as it requires specific information on an individual s utility function chetty 2006 uses the fact that rra is directly related to the ratio of the income and compensated wage elasticities of labor supply and presents a formula that allows for the estimation of the coefficient of rra using labor supply data recall that rra is proportional to u sub cc u sub c where u sub c is the first partial derivative of the utility function with respect to consumption and u sub cc is the second derivative an agent s compensated wage elasticity is directly related to u sub c the larger the marginal utility of consumption the more benefit the agent gets from an additional dollar of income so the more willing he is to work when his wage increases

food subsidies and poverty alleviation this paper formulates the problem of the optimal pattern of food subsidies in a general setting where the objective is to minimize a class of poverty indices within the framework of the mo dern public finance theory taking explicit account of the budget con straint and preferences and technologies the authors derive rules fo r retargetting food subsidies to reduce poverty many operational rul es of thumb appear as special cases of the general results the analy sis thus provides not only the microfoundations of these operational rules but also their appropriate generalizations when the conditions under which they arise are not fulfilled copyright 1988 by royal economic society

loss aversion in politics we study how loss aversion affects the political equilibrium in a simple majority voting model first we show a status quo bias which leads to path dependence second loss aversion implies a moderating effect on the most extreme voters third in a dynamic setting the effect of loss aversion diminishes with the length of the planning horizon of voters however in the presence of a projection bias majorities are partially unable to understand how fast they will adapt to a new policy this makes changes less likely and induces time inconsistency policy changes are timid at the beginning while in later periods they are made progressively more radical fourth in a stochastic environment loss aversion yields a significant distaste for risk but also a smaller attachment to the status quo the application of these results to a model of redistribution leads to empirically plausible implications

schooling and labor market consequences of school construction in indonesia evidence from an unusual policy experiment between 1973 and 1978 the indonesian government engaged in one of the largest school construction programs on record combining differences across regions in the number of schools constructed with differences across cohorts induced by the timing of the program suggests that each primary school constructed per 1 000 children led to an average increase of 0 12 to 0 19 years of education as well as a 1 5 to 2 7 percent increase in wages this implies estimates of economic returns to education ranging from 6 8 to 10 6 percent

mobile phones and economic development in rural peru the authors estimate the effects of mobile phone coverage on different measures of economic development the authors exploit the timing of mobile coverage at the village level merging it with a village level panel dataset for rural peru the main findings suggest that mobile phone expansion has increased household real consumption by 11 percent reduced poverty incidence by 8 percentage points and decreased extreme poverty by 5 4 percentage points moreover those benefits appear to be shared by all covered households regardless of mobile ownership

the risk preferences of u s executives in this paper i elicit risk attitudes of u s executives by calibrating a subjective option valuation model for option exercising data 1996 to 2008 yielding approximately 65 000 values of relative risk aversion rra for almost 7 000 executives the observed behavior is generally consistent with moderate risk aversion and a median mean rra close to one three values are validated for chief executive officers ceos by testing theory based predictions on the influence of individual characteristics on risk preferences such as gender marital status religiosity and intelligence senior managers such as ceos presidents and chairpersons of the boards of directors are significantly less risk averse than non senior executives rra heterogeneity is strongly correlated with sector membership and firm level variables such as size performance and capital structure alternative factors influencing option exercises are tested for their influence on rra values this paper was accepted by brad barber finance