a note on comparative downside risk aversion abstract we provide comparative global conditions for downside risk aversion which are similar to the ones studied by ross for risk aversion we define a coefficient of downside risk aversion and study its local properties

sufficient decisions in multi sided and multiproduct markets we show that in many models where firms make multiple decisions analysis can be made more tractable by re formulating the model into one in which each firm makes a single choice which we call a sufficient decision the transformation allows application of standard techniques in these settings including pass through for tax incidence and upward pricing pressure for merger analysis the transformation works because the assumption of profit maximization links the firms decisions together examples include models of monopoly and oligopoly in two sided markets where a natural sufficient decision may be the number of transactions that the firm facilitates and multiproduct markets

price coherence and excessive intermediation suppose an intermediary provides a benefit to buyers when they purchase from sellers using the intermediary s technology we develop a model to show that the intermediary would want to restrict sellers from charging buyers more for transactions it intermediates with this restriction an intermediary can profitably raise demand for its services by eliminating any extra price buyers face for purchasing through the intermediary we show that this leads to inflated retail prices excessive adoption of the intermediaries services over investment in benefits to buyers and a reduction in consumer surplus and sometimes welfare competition among intermediaries intensifies these problems by increasing the magnitude of their effects and broadening the circumstances in which they arise we discuss applications to payment card systems travel reservation systems rebate services and various other intermediaries jel codes d40 l11 l14 l42

school choice school quality and postsecondary attainment we study the impact of a public school choice lottery in charlotte mecklenburg schools on college enrollment and degree completion we find a significant overall increase in college attainment among lottery winners who attend their first choice school using rich administrative data on peers teachers course offerings and other inputs we show that the impacts of choice are strongly predicted by gains on several measures of school quality gains in attainment are concentrated among girls girls respond to attending a better school with higher grades and increases in college preparatory course taking while boys do not

research on the motion picture industry state of the art and new directions off the beaten track away from theatrical release the motion picture industry has been subject of extensive academic research over the last decades however most scholars focused on the u s theatrical motion picture market the number of research activities regarding even more profitable release windows such as home video or television has been substantially lower although international distribution is essential for a motion picture project to break even there has been little significant re search on most other markets this paper aims at summarizing the current state of research on the motion picture industry particularly from marketing and management perspective revealing research gaps and proposing recommendations for future research endeavors therefore a three pillar scheme is developed to systemize previous findings research on intraorganizational decision making contractual relationships between national stakeholders and international market competition are differentiated since these insights are mainly derived from u s theatrical exhibition they can hardly be applied to other markets and exhibition windows thus potential research areas are identified to expand knowledge of posttheatrical and international markets

economic growth comparative advantage and gender differences in schooling outcomes evidence from the birthweight differences of chinese twins abstract data from two surveys of twins in china are used to contribute to an improved understanding of the role of economic development in affecting gender differences in the trends in levels of and returns to schooling observed in china and in many developing countries in recent decades in particular we explore the hypothesis that these phenomena reflect differences in comparative advantage with respect to skill and brawn between men and women in the context of changes in incomes returns to skill and or nutritional improvements that are the result of economic development and growth

optimal self protection in two periods on the role of endogenous saving self protection is a costly investment to reduce the probability of loss this paper studies optimal self protection in a two period model with endogenous saving in a setting with a binary loss we show that prudence is negatively associated with the optimal level of self protection consistent with results obtained in single period models we provide intuition for this finding with the help of a recent approach based on stochastic dominance furthermore we determine the effect of interest rate risk on optimal self protection and study a model in which a decision maker engages in advance effort to increase the probability of facing a better risky situation all our results suggest that the understanding of advance self protection crucially hinges on whether the decision maker also uses saving to optimize intertemporal consumption utility if so the fact that self protection expenditures are upfront turns out to be irrelevant

changing risks and optimal effort consider a decision maker who can engage in effort to increase the probability of facing a better risky situation intuition suggests that effort should increase when there is a greater difference between the best risky situation and the worse one we show that this intuition is not necessarily valid and we consider the cases of risk averters and risk lovers

measuring the impacts of teachers ii teacher value added and student outcomes in adulthood abstract are teachers impacts on students test scores value added a good measure of their quality this question has sparked debate partly because of a lack of evidence on whether high value ad

higher order generalizations of arrow pratt and ross risk aversion a comparative statics approach abstract we analyze comparative risk aversion in a new way through a comparative statics problem in which for a cost agents can shift from an initial probability distribution toward a preferred distribution the ross characterization arises when the original distribution is riskier than the preferred distribution and the cost is monetary and the arrow pratt characterization arises when the original distribution differs from the preferred distribution by a simple mean preserving spread and the cost is a utility cost higher order increases in risk lead to higher order generalizations and the comparative statics method yields a unified approach to the problem of comparative risk attitudes

first party content and coordination in two sided markets the strategic use of first party content by two sided platforms is driven by two key factors the nature of buyer and seller expectations favorable versus unfavorable and the nature of the relationship between first party content and third party content complements or substitutes platforms facing unfavorable expectations face an additional constraint their prices and first party content investment need to be such that low zero participation equilibria are eliminated this additional constraint typically leads them to invest more less in first party content relative to platforms facing favorable expectations when first and third party content are substitutes complements these results hold with both simultaneous and sequential entry of the two sides with two competing platforms incumbent facing favorable expectations and entrant facing unfavorable expectations and multi homing on one side of the market the incumbent always invests weakly more in first party content relative to the case in which it is a monopolist this paper was accepted by bruno cassiman business strategy

negative intra group externalities in two sided markets two types of agents interact on a pre existing free platform agents value positively the presence of agents of the other type but may value negatively the presence of agents of their own type we ask whether a new platform can find fees and subsidies so as to divert agents from the existing platform and make a profit we show that this might be impossible if intra group negative externalities are sufficiently but not too strong with respect to positive inter group externalities

the effect of prenatal stress on cooperation evidence from violent conflict in uganda abstract are preferences endogenously determined in the womb we play a public goods game with ugandan children born during a conflict characterised by high civilian victimisation children whose caregivers suffer from post traumatic stress disorder are more likely to free ride in the game genetic and environmental factors alone do not explain the relationship but children s 2d 4d digit ratio a marker of fetal hormone exposure associated with epigenetic effects of maternal distress does our findings extend the fetal origins literature to the domain of preferences by reducing next generation s taste for cooperation conflict may have father reaching economic consequences than previously thought

violence and birth outcomes evidence from homicides in brazil abstract this paper uses microdata from brazilian vital statistics on births and deaths between 2000 and 2010 to estimate the impact of in utero exposure to local violence measured by homicide rates on birth outcomes the estimates show that exposure to violence during the first trimester of pregnancy leads to a small but precisely estimated increase in the risk of low birthweight and prematurity effects are found both in small municipalities where homicides are rare and in large municipalities where violence is endemic and are particularly pronounced among children of poorly educated mothers implying that violence compounds the disadvantage that these children already suffer as a result of their households lower socioeconomic status

mixed risk aversion abstract we analyze the class of increasing utility functions exhibiting all derivatives of alternating sign this property that we call mixed risk aversion is satisfied by the utility functions most commonly used in financial economics the utility functions displaying mixed risk aversion can be expressed as mixtures of exponential functions we characterize stochastic dominance and we find conditions for both mutual aggravation and mutual amelioration of risks when agents are mixed risk averse finally the analysis of the distribution function describing a mixed utility allows one to characterize the behaviour of its indexes of risk aversion and to discuss its implications for portfolio selection journal of economic literature classification numbers d81 g11

violence and risk preference experimental evidence from afghanistan we investigate the relationship between violence and economic risk preferences in afghanistan combining i a two part experimental procedure identifying risk preferences violations of expected utility and specific preferences for certainty ii controlled recollection of fear based on established methods from psychology and iii administrative violence data from precisely geocoded military records we document a specific preference for certainty in violation of expected utility the preference for certainty which we term a certainty premium is exacerbated by the combination of violent exposure and controlled fearful recollections the results have implications for risk taking and are potentially actionable for policymakers and marketers

the ross characterization of risk aversion strengthening and extension this paper offers an interpretive comparison of the arrow pratt and ross characterizations of comparative risk aversion for expected utility maximizers the tools used in this comparison are then applied to obtain a strengthening of the ross cha racterization this strengthened result is in turn extended to the ca se of general smooth nonexpected utility preferences over probabili ty distributions copyright 1987 by the econometric society

the costs of low birth weight birth weight has emerged as the leading indicator of infant health and welfare and the central focus of infant health policy this is because low birth weight lbw infants experience severe health and developmental difficulties that can impose enormous costs on society but would the prevention of lbw generate equally sizable cost savings and health improvements estimates of the return to lbwprevention from cross sectional associations may be biased by omitted variables that cannot be influenced by policy such as genetic factors to address this we compare the hospital costs health at birth and infant mortality rates between heavier and lighter infants from all twin pairs born in the united states we also examine the effect of maternal smoking during pregnancy the leading risk factor for lbw in the united states on health among singleton births after controlling for detailed background characteristics both analyses imply substantially smaller effects of lbw than previously thought suggesting two possibilities 1 existing estimates overstate the true costs and consequences of lbw by at least a factor of four and by as much as a factor of 20 or 2 different lbw preventing interventions have different health and cost consequences implying that policy efforts that presume a single return to reducing lbw will necessarily be suboptimal

the effect of randomized school admissions on voter participation there is little causal evidence on the effect of economic and policy outcomes on voting behavior this paper uses randomized outcomes from a school choice lottery to examine if lottery outcomes affect voting behavior in a school board election we show that losing the lottery has no significant impact on overall voting behavior however among white families those with above median income and prior voting history lottery losers were significantly more likely to vote than lottery winners using propensity score methods we compare the voting of lottery participants to similar families who did not participate in the lottery we find that losing the school choice lottery caused an increase in voter turnout among whites while winning the lottery had no effect relative to non participants overall our empirical results lend support to models of expressive and retrospective voting where likely voters are motivated to vote by past negative policy outcomes

economic status and health in childhood the origins of the gradient the well known positive association between health and income in adulthood has antecedents in childhood not only is children s health positively related to household income but the relationship between household income and children s health becomes more pronounced as children age part of the relationship can be explained by the arrival and impact of chronic conditions children from lower income households with chronic conditions have worse health than do those from higher income households the adverse health effects of lower income accumulate over children s lives part of the intergenerational transmission of socioeconomic status may work through the impact of parents income on children s health

from the cradle to the labor market the effect of birth weight on adult outcomes lower birth weight babies have worse outcomes both short run in terms of one year mortality rates and longer run in terms of educational attainment and earnings however recent research has called into question whether birth weight itself is important or whether it simply reflects other hard to measure characteristics by applying within twin techniques using an unusually rich dataset from norway we examine the effects of birth weight on both short run and long run outcomes for the same cohorts we find that birth weight does matter despite short run twin fixed effects estimates that are much smaller than ols estimates the effects on longer run outcomes such as adult height iq earnings and education are significant and similar in magnitude to ols estimates

chicken and egg competition among intermediation service providers we analyze a model of imperfect price competition between intermediation service providers we insist on features that are relevant for informational intermediation via the internet the presence of indirect network externalities the possibility of using the nonexclusive services of several intermediaries and the widespread practice of price discrimination based on users identity and on usage efficient market structures emerge in equilibrium as well as some specific form of inefficient structures intermediaries have incentives to propose non exclusive services as this moderates competition and allows them to exert market power we analyze in detail the pricing and business strategies followed by intermediation services providers copyright 2003 by the rand corporation

putting risk in its proper place this paper examines preferences toward particular classes of lottery pairs we show how such concepts as prudence and temperance can be fully characterized by a preference relation over these lotteries if preferences are defined in an expected utility framework with differentiable utility the direction of preference for a particular class of lottery pairs is equivalent to signing the nth derivative of the utility function what makes our characterization appealing is its simplicity which seems particularly amenable to experimentation

alternative approaches to comparative nth degree risk aversion this paper extends the three main approaches to comparative risk aversion the risk premium approach and the probability premium approach of pratt 1964 risk aversion in the small and in the large

the probability premium a graphical representation we illustrate that pratt s probability premium can be given a simple graphical representation allowing a direct comparison to the equivalent but more prevalent concept of risk premium under expected utility we also show that the probability premium s graphical representation under the dual theory mimics that of the risk premium under expected utility

multidimensional platform design successful platforms attract not just many users but also those of the right kind the right kind of user is one who can either be directly monetized or who differentially attracts other valuable users bonacich centrality on the network of user sorting with direct value of monetization captures this feedback loop and thus characterizes the value of user characteristics we use this value to determine optimal steady state platform design and reliable means for platforms to reach such a steady state we apply these results respectively to explain the dynamic growth strategy of social networks and urban development policies of cities

innovation rent extraction and integration in systems markets author s farrell joseph katz michael abstract we consider innovation incentives in markets where final goods comprise two strictly complementary components one of which is monopolized we focus on the case in which the complementary component is competitively supplied and in which innovation is important we explore ways in which the monopoly may have incentives to confiscate efficiency rents in the competitive sector thus weakening or destroying incentives for independent innovation we discuss how these problems are affected if the monopolist integrates into the competitive sector

consistency of higher order risk preferences risk aversion a second order risk preference is a time proven concept in economic models of choice under risk more recently the higher order risk preferences of prudence third order and temperance fourth order also have been shown to be quite important while a majority of the population seems to exhibit both risk aversion and these higher order risk preferences a significant minority does not we show how both risk averse and risk loving behaviors might be generated by a simple type of basic lottery preference for either 1 combining good outcomes with bad ones or 2 combining good with good and bad with bad respectively we further show that this dichotomy is fairly robust at explaining higher order risk attitudes in the laboratory in addition to our own experimental evidence we take a second look at the extant laboratory experiments that measure higher order risk preferences and we find a fair amount of support for this dichotomy our own experiment also is the first to look beyond fourth order risk preferences and we examine risk attitudes at even higher orders

the economics of schooling production and efficiency in public schools n recent years public and professional interest in schools has been heightened by a spate of reports many of them critical of current school policy these policy documents have added to persistent and long standing concerns about the cost effectiveness and fairness of the current school structure and have made schooling once again a serious public issue as in the past however any renewed interest in education is likely to be short lived doomed to dissipate as frustration over the inability of policy to improve school practice sets in this frustration about school policy relates directly to knowledge about the educational production process and in turn to underlying research on schools although the educational process has been extensively researched clear policy prescriptions flowing from this research have been difficult to derive 2 there exists however a consistency to the research findings that does have an immediate application to school policy schools differ dramatically in quality

bundling information goods of decreasing value consumers average value for information goods websites weather forecasts music and news declines with the number consumed this paper provides simple guidelines to optimal bundling marketing strategies in this case if consumers values do not decrease too quickly we show that bundling is approximately optimal if consumers values to subsequent goods decrease quickly we show by example that one should expect bundling to be suboptimal

health at birth parental investments and academic outcomes this paper explores the relationship among health at birth academic outcomes and the potential role of parental investments using administrative panel data from chile using detailed data on pare

private school vouchers and student achievement an evaluation of the milwaukee parental choice program in 1990 wisconsin began providing vouchers to a small number of low income students to attend nonsectarian private schools controlling for individual fixed effects i compare the test scores of students selected to attend a participating private school with those of unsuccessful applicants and other students from the milwaukee public schools i find that students in the milwaukee parental choice program had faster math score gains than but similar reading score gains to the comparison groups the results appear robust to data imputations and sample attrition although these deficiencies of the data should be kept in mind when interpreting the results

poor little rich kids the role of nature versus nurture in wealth and other economic outcomes and behaviors wealth is highly correlated between parents and their children however little is known about the extent to which these relationships are genetic or determined by environmental factors we use administrative data on the net wealth of a large sample of swedish adoptees merged with similar information for their biological and adoptive parents comparing the relationship between the wealth of adopted and biological parents and that of the adopted child we find that even prior to any inheritance there is a substantial role for environment and a much smaller role for pre birth factors and we find little evidence that nature nurture interactions are important when bequests are taken into account the role of adoptive parental wealth becomes much stronger our findings suggest that wealth transmission is not primarily because children from wealthier families are inherently more talented or more able but that even in relatively egalitarian sweden wealth begets wealth we further build on the existing literature by providing a more comprehensive view of the role of nature and nurture on intergenerational mobility looking at a wide range of different outcomes using a common sample and method we find that environmental influences are relatively more important for wealth related variables such as savings and investment decisions than for human capital we conclude by studying consumption as an overall measure of welfare and find that like wealth it is more determined by environment than by biology

stronger measures of higher order risk attitudes this paper aims to extend the results by ross 1981 15 and by modica and scarsini 2005 13 to stochastic dominance of degree 4 and over specifically it is shown that ross approach can be extended to any order of risk attitude beyond the generalization proposed by modica and scarsini by means of sth degree increase in risk defined by ekern 1980 8 c 2010 elsevier inc all rights reserved

prudence probability premium abstract prudence probability premium is defined in the risk apportionment model eeckhoudt and schlesinger 2006 for an increase in downside risk we show sufficient conditions for comparing the probability premiums between two individuals when the apportioned risk is small and large

does school quality matter returns to education and the characteristics of public schools in the united states this paper estimates the effects of school quality measured by the pupil teacher ratio average term length and relative teacher pay on the rate of return to education for men born between 1920 and 1949 using earnings data from the 1980 census we find that men who were educated in states with higher quality schools have a higher return to additional years of schooling rates of return are also higher for individuals from states with better educated teachers and with a higher fraction of female teachers holding constant school quality measures however we find no evidence that parental income or education affects average state level rates of return

how does your kindergarten classroom affect your earnings evidence from project star in project star 11 571 students in tennessee and their teachers were randomly assigned to classrooms within their schools from kindergarten to third grade this article evaluates the long term impacts of star by linking the experimental data to administrative records we first demonstrate that kindergarten test scores are highly correlated with outcomes such as earnings at age 27 college attendance home ownership and retirement savings we then document four sets of experimental impacts first students in small classes are significantly more likely to attend college and exhibit improvements on other outcomes class size does not have a significant effect on earnings at age 27 but this effect is imprecisely estimated second students who had a more experienced teacher in kindergarten have higher earnings third an analysis of variance reveals significant classroom effects on earnings students who were randomly assigned to higher quality classrooms in grades k 3 as measured by classmates end of class test scores have higher earnings college attendance rates and other outcomes finally the effects of class quality fade out on test scores in later grades but gains in noncognitive measures persist

to bundle or not to bundle commodity bundling is studied in an environment where the dispersion of valuations unambiguously decreases when two or more goods are sold as a bundle only bundling is more likely to dominate separately selling the goods if marginal costs are low relative to the average valuation or if the distribution of valuations is very peaked around the mean

healthcare investment and income inequality abstract this paper examines how the relative shares of public and private health expenditures impact income inequality we study a two period overlapping generation s growth model in which longevity is determined by both private and public health expenditure and human capital is the engine of growth increased investment in health reduces mortality raises return to education and affects income inequality in such a framework we show that the cross section earnings inequality is non decreasing in the private share of health expenditure we test this prediction empirically using a variable that proxies for the relative intensity of investments private versus public using vaccination data from the national sample survey organization for 76 regions in india in the year 1986 87 we link this with region specific expenditure inequality data for the period 1987 2012 our empirical findings though focused on a specific health investment vaccines suggest that an increase in the share of the privately provided health care results in higher inequality

the monetary utility premium and interpersonal comparisons the utility premium is generally defined as the pain or reduction in expected utility caused by an nth degree risk increase where n 2 while it is a very useful concept in understanding a decision maker s choice in uncertain situations the utility premium is not interpersonally comparable this note shows that the monetary utility premium the utility premium divided by the expected marginal utility at the random starting wealth is interpersonally comparable and the comparison is characterized by ross more risk aversion of the corresponding degree

can higher achieving peers explain the benefits to attending selective schools evidence from trinidad and tobago abstract using exogenous secondary school assignments to remove self selection bias to schools and peers within schools i credibly estimate both 1 the effect of attending schools with higher achieving peers and 2 the direct effect of short run peer quality improvements within schools on the same population while students at schools with higher achieving peers have better academic achievement within school short run increases in peer achievement improve outcomes only at high achievement schools short run direct peer quality accounts for only one tenth of school value added on average but at least one third among the most selective schools there are large and important differences by gender

exploring higher order risk effects higher order risk effects play an important role in examining economic behavior under uncertainty a precautionary demand for saving has been linked to the property of prudence and the property of temperance has been used to show how the presence of an unavoidable risk affects one s behavior towards a second risk these two properties also play key roles in aversion to negative skewness and to kurtosis respectively both properties recently have been characterized by preferences over lottery pairs in simple 50 50 gambles the simplicity of this characterization is ideal for experimental investigation this article reports the results of such experiments and concludes that there is behavioral evidence for prudence but not for temperance implications of these results for both expected utility and non expected utility models are examined

two sided markets a progress report the paper provides a road map to the burgeoning literature on two sided markets and presents new results it identifies two sided markets with markets in which the structure and not only the level of prices charged by platforms matters the failure of the coase theorem is necessary but not sufficient for two sidedness the paper builds a model integrating usage and membership externalities that unifies two hitherto disparate strands of the literature emphasizing either form of externality and obtains new results on the mix of membership and usage charges when price setting or bargaining determine payments between end users

technological platforms and diversification as the invention of fundamental new sciences spawns subsequent research discovery and commercialization core technologies branch into new applications and markets some of them evolve over time into many derived technologies whereas others are essentially dead ends the pattern of evolution and branching is called a technological trajectory an intriguing question is whether some firms can ride the trajectory by developing proprietary experience in a platform technology because the knowledge is proprietary firms that originate in industrial fields based on a platform technology acquire the technological skills to diversify and to mimic the branching of the underlying technological trajectory the ability to compete in hypercompetitive markets depends on the acquisition of know how that is applicable to a wide set of market opportunities such capabilities serve as platforms into quickly evolving markets to respond rapidly to market changes a firm must have already acquired fundamental compet

marketplace or reseller intermediaries can choose between functioning as a marketplace in which suppliers sell their products directly to buyers or as a reseller by purchasing products from suppliers and selling them to buyers we model this as a decision between whether control rights over a noncontractible decision variable the choice of some marketing activity are better held by suppliers the marketplace mode or by the intermediary the reseller mode whether the marketplace or the reseller mode is preferred depends on whether independent suppliers or the intermediary have more important information relevant to the optimal tailoring of marketing activities for each specific product we show that this trade off is shifted toward the reseller mode when marketing activities create spillovers across products and when network effects lead to unfavorable expectations about supplier participation if the reseller has a variable cost advantage respectively disadvantage relative to the marketplace then the trade off is shifted toward the marketplace for long tail respectively short tail products we thus provide a theory of which products an intermediary should offer in each mode we also provide some empirical evidence that supports our main results data as supplemental material are available at http dx doi org 10 1287 mnsc 2014 2042 this paper was accepted by bruno cassiman business strategy

the effects of poor neonatal health on children s cognitive development we make use of a new data resource merged birth and school records for all children born in florida from 1992 to 2002 to study the relationship between birth weight and cognitive development using singletons as well as twin and sibling fixed effects models we find that the effects of early health on cognitive development are essentially constant through the school career that these effects are similar across a wide range of family backgrounds and that they are invariant to measures of school quality we conclude that the effects of early health on adult outcomes are therefore set very early

gender and performance evidence from school assignment by randomized lottery school choice programs are intended to improve student achievement by allowing for better matches between students and schools it is not clear however that academic achievement will improve if parents make school choice decisions over both academic and nonacademic school attributes justine s hastings et al 2005 2006 indeed many randomized studies of impacts of school choice find little or no effect of school choice on academic outcomes for example initial evaluations of randomized voucher experiments in milwaukee and new york city found modest academic impacts on eligible students john f witte et al 1995 daniel p mayer et al 2002 more recently evaluations of public school choice lotteries in chicago and charlotte have found no difference between the average lottery winner and loser in academic outcomes such as test scores julie cullen et al 2003 hastings et al 2006 when parents are choosing schools for academic and nonacademic reasons school choice may increase utility but not necessarily improve academic outcomes there is growing evidence that educational interventions may have heterogeneous treatment effects by gender analysis of the moving to opportunity demonstration in which parents were randomly given the opportunity to move to nonpoverty neighborhoods found improvements in education mental health and criminal behavior for females but negative effects on males jeffrey r kling and jeffrey b liebman 2004 similarly michael anderson 2005 reanalyzed data from three randomized trials of early childhood education and found that all of the long term benefits accrued to girls and not to boys we use data from a public school choice program with school assignment by lottery to estimate the impacts on academic outcomes by race and gender of attending a first choice school our data come from the charlottemecklenburg school district cms in north carolina which introduced district wide public school choice in the fall of 2002 after a racebased busing plan was terminated by the courts the data include students choices lottery numbers school assignments demographics and academic achievement for the years surrounding implementation of school choice we compare outcomes for those making similar choices whose school assignment was determined solely by lottery number overall there was no gain in academic achievement for those winning the lottery white females did experience significant improvements in test scores when randomized into their first choice school however white females were also more likely to choose academically focused magnets and among those who won the lottery reported significant increases in time spent on homework our evidence suggests that school choice programs may have heterogeneous treatment effects by gender which are related to differences in the factors driving parental choices

two sided network effects a theory of information product design how can firms profitably give away free products this paper provides a novel answer and articulates trade offs in a space of information product design we introduce a formal model of two sided network externalities based in textbook economics a mix of katz and shapiro network effects price discrimination and product differentiation externality based complements however exploit a different mechanism than either tying or lock in even as they help to explain many recent strategies such as those of firms selling operating systems internet browsers games music and video the model presented here argues for three simple but useful results first even in the absence of competition a firm can rationally invest in a product it intends to give away into perpetuity second we identify distinct markets for content providers and end consumers and show that either can be a candidate for a free good third product coupling across markets can increase consumer welfare even as it increases firm profits the model also generates testable hypotheses on the size and direction of network effects while offering insights to regulators seeking to apply antitrust law to network markets

search diversion and platform competition abstract platforms use search diversion in order to trade off total consumer traffic for higher revenues derived by exposing consumers to unsolicited products e g advertising we show that competition between platforms leads to lower equilibrium levels of search diversion relative to a monopoly platform when the intensity of competition is high on the other hand if there is only mild competition then competing platforms induce more search diversion relative to a platform monopolist when platforms charge consumers fixed access fees all equilibrium levels of search diversion under platform competition are equal to the monopoly level irrespective of the nature of competition furthermore relative to platforms that cannot charge such fees platforms that charge positive negative access fees to consumers have weaker stronger incentives to divert search

greater downside risk aversion in the large abstract in this paper we advance a definition of greater downside risk aversion that applies to both large and small changes in risk preference and thereby complements the results for small changes reported previously we show that a downside risk averse transformation of a utility function results in a function that is more downside risk averse in the same manner that a risk averse transformation increases risk aversion our demonstration is conducted first by using the compensated approach introduced by diamond and stiglitz p diamond j stiglitz increases in risk and in risk aversion j econ theory 8 1974 337 360 and then by using an adaptation of the risk premium approach taken by pratt j pratt risk aversion in the small and in the large econometrica 32 1964 122 136

substituting one risk increase for another a method for measuring risk aversion abstract this paper defines the rate of substitution of one stochastic change to a random variable for another it then focuses on the case where one of these changes is an nth degree risk increase and the other is an mth degree risk increase where n m 1 the paper shows that the rate of substitution for these two risk increases can be used to provide a broader definition and two additional characterizations of the nth degree ross more risk averse partial order the implications for local intensity measures of nth degree risk aversion are also examined the analysis organizes the existing results as well as generates new ones

some stronger measures of risk aversion in the small and the large with applications the arrow pratt measures of risk aversion for von neumann morgenstern utility functions have become workhorses for analyzing problems in the microeconomics of uncertainty they have been used to characterize the qualitative properties of demand in insurance and asset markets to examine the properties of risk taking in taxation models and to study the interaction between risk and life cycle savings problems to name just a few applications equally importantly they have generated the linear risk tolerance class of utility functions which has provided canonical examples in such diverse areas as portfolio theory and the theory of teams despite these successes there have been a number of areas for which the results have been weaker than hoped it is natural to use the risk aversion measures to compare the behavior of individuals in risky choice situations for example consider the individual portfolio choice problem in a two asset world with a riskless asset and a risky asset if individual a has a uniformly higher arrow pratt coefficient of risk aversion than individual b then b will always choose a portfolio combination with more wealth invested in the risky asset but suppose that both assets are risky now there is no obvious sense in which the more risk averse individual can be said to hold a less risky portfolio but it seems strange that such a simple alteration should destroy the analytics which support the basic intuition similarly consider the basic insurance problem if one individual a is more risk averse than another b in the arrow pratt sense it follows that a will pay a larger premium to insure against a random loss than will b typically though an individual evaluates partial rather than total insurance that is only some gambles can be insured against and others must be retained in this case even when the gambles which are retained are independent from those which are insured it is no longer true that the individual whose arrow pratt measure of risk aversion is higher will pay a larger insurance premium the situation is no better when we consider comparative statics exercises for a single individual decreasing absolute risk aversion in the sense of arrow and

testing for prudence and skewness seeking numerous theoretical predictions such as precautionary saving or preventive behavior have been derived for prudent decision makers further prudence can be characterized as downside risk aversion and plays a key role in preference for skewness we use a simple experimental method to test for prudence and skewness preference in the laboratory and compare the two to this end we introduce a novel graphical representation of compound lotteries that is easily accessible to subjects and test it for robustness using a factorial design prudence is observed on the aggregate and individual level we find that prudence does not boil down to skewness seeking we further provide some theoretical explanations for this result this paper was accepted by peter wakker decision analysis

the effect of child health insurance access on schooling evidence from public insurance expansions although a sizable literature analyzes the effects of public health insurance programs on short run health outcomes little prior work has examined their long term effects we examine the effects of public insurance expansions among children in the 1980s and 1990s on their future educational attainment we find that expanding health insurance coverage for low income children increases the rate of high school and college completion these estimates are robust to only using federal medicaid expansions and mostly are due to expansions that occur when the children are not newborns our results indicate that the long run benefits of public health insurance are substantial

school quality and the gender gap in educational achievement abstract recent evidence indicates that boys and girls are differently affected by the quantity and quality of family inputs received in childhood we assess whether this is also true for schooling inputs using matched florida birth and school administrative records we estimate the causal effect of school quality on the gender gap in educational outcomes by contrasting opposite sex siblings who attend the same sets of schools thereby purging family heterogeneity and leveraging within family variation in school quality arising from family moves investigating middle school test scores absences and suspensions we find that boys benefit more than girls from cumulative exposure to higher quality schools

school quality and black white relative earnings a direct assessment the wage differential between black and white men fell from 40 percent in 1960 to 25 percent in 1980 it has been argued that this convergence reflects improvements in the relative quality of black schools to test this hypothesis we assembled data on pupil teacher ratios annual teacher pay and term length for black and white schools in the eighteen segregated states from 1915 to 1966 these data are linked to estimated returns to education for southern born men from different cohorts and states in 1960 1970 and 1980 improvements in the relative quality of black schools explain 20 percent of the narrowing of the black white earnings gap between 1960 and 1980

the utility premium of friedman and savage comparative risk aversion and comparative prudence we show that the utility premium of friedman and savage can be used to explain comparative risk aversion and comparative prudence more precisely we show that the greater the risk aversion measure the greater a risk s utility premium normalized by the marginal utility and that the greater the prudence measure the greater the utility premium for disaggregating a certain loss of wealth and a zero mean risk normalized by the utility function s second derivative

birth weight in the long run we study the effect of birth weight on long run outcomes using data on swedish twins born between 1926 and 1958 linked to administrative records spanning entire life time labor market histories we

do population control policies induce more human capital investment twins birthweight and china s one child policy in this paper we address the issues of whether reductions in fertility increase human capital investments per child and whether twinning can identify the quantity quality q q trade off we show that estimates of the effects of twinning at higher parities on the outcomes of older children in prior studies do not identify family size effects but are confounded by inter child allocation effects because of the endowment deficit and close spacing of twins however examining the effects of twinning by birth order net of the effects stemming from the endowment deficit of twins can provide upper and lower bounds on the trade off between the family size and average child quality our estimates based on data from china indicate that an extra child at parity one or at parity two net of one component of birth endowment effects associated with birth weight significantly decreases the schooling progress the expected college enrolment grades in school and the assessed health of all children in the family despite the evident significant trade off between number of children and child quality in china the findings suggest that the contribution of the one child policy in china to the development of its human capital was modest copyright wiley blackwell

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

changes in risk and the demand for saving abstract how does risk affect saving empirical work typically examines the effects of detectible differences in risk within the data how these differences affect saving in theoretical models depends on the metric one uses for risk for labor income risk second degree increases in risk require prudence to induce increased saving demand however prudence is not necessary for first degree risk increases and not sufficient for higher degree risk increases for increases in interest rate risk a precautionary effect and a substitution effect need to be compared this paper provides necessary and sufficient conditions on preferences for an n th degree change in risk to increase saving