aging and inequality in income and health in our earlier work we used data from the national health interview survey nhis to examine life cycle patterns in health status and in the joint distribution of health status and income deaton and paxson 1998 in this paper we summarize and extend those results and provide new evidence from the panel study of income dynamics psid both surveys contain a measure of household income and collect information on an ordinal measures of self reported health status srhs that ranges from 1 excellent to 5 poor section i concerns problems related to the measurement of inequality in health section ii presents evidence from the two surveys on health and income inequality this abstract was borrowed from another version of this item

consumption experience and sales promotion expenditure an economic theory of habit formation through consumption learning is developed to explain order differences in relative sales promotion expenditures among brands the theory applies to consumer brands in equilibrium markets where consumer information from sources other than advertising sales promotion and previous consumption experience is negligible three propositions are derived from the theory brands with more consumption experience 1 spend proportionately less on sales promotion as well as 2 on advertising and promotion combined and 3 place proportionately more emphasis on advertising relative to sales promotion these propositions are formulated as hypotheses and tested against empirical data from the pims project it is found that the data are generally consistent with the propositions in order to examine the robustness of the results the hypotheses are subjected to three different empirical tests each with different assumptions the findings are shown to be reasonably robust with re

order of entry as a moderator of the effect of the marketing mix on market share order of entry has been demonstrated to have a significant effect on market share a number of explanations for this effect have been suggested in the marketing and strategy literatures to date the market share advantage gained by pioneers has typically been treated as a main effect an automatic regularity treating order of entry as a main effect implies that there is no penalty on the effectiveness of a brand s marketing instruments for late entry and that a late entrant can compensate for being late by dedicating sufficient marketing resources to their product in this study we investigate the influence of order of entry into a market on the effectiveness of a firm s marketing mix decisions by asking the question can followers compensate for not being first by their marketing mix decisions also even if they can compensate for being late does this effort become increasingly more difficult with later entry that is are there asymmetries in the effectiveness of a brand s marketing mix variables that relate to its order of entry into the market or as has been typically assumed to date is order of entry strictly a main effect an asymmetry exists for example if the market response to advertising is different for the first entrant versus the second or third entrant an asymmetry also exists if the effects of say a price change by the first entrant on the second entrant are different than the effects on the third entrant we develop a market share attraction model where the parameters vary as a function of order of entry our main contribution is in modeling the sources of order of entry advantage as asymmetries in the effectiveness of a brand s marketing instruments hence distinct from previous research we explain why there are inherent order of entry effects this paper is potentially of interest to researchers developing market share models and studying the effectiveness of marketing mix variables the substantive implication of our results concern directly academics interested in marketing strategy as well as the practicing marketing strategists we model asymmetries in the market response of early entrants versus late entrants using data from two durables and three nondurables categories with one exception all data sets are established from the inception of the category and hence do not suffer from the possible bias of excluding pioneers who have failed results show that asymmetries in the effectiveness of a brand s marketing mix variables are an essential source of order of entry effects we find that the main effects of order of entry are minimal order of entry effects do not necessarily lead to lower shares but overcoming these effects is not without substantial cost to the late entrant our results support previous research that has demonstrated advantages to early entry in addition we provide guidelines for how late entrants should compete later entry tends to reduce a competitor s price sensitivity suggesting that they not instigate in a price war with earlier entrants in order to gain share order of entry tends to decrease response to quality and to promotion to achieve the same impact on market share later entrants need a bigger change in quality and need to spend more on promotion our data did not support an asymmetric effect on advertising

subsidy and tuition policies in public higher education i introduction the much discussed and widely debated recent conditions in public higher education include expanding enrollments flat if not declining public appropriations per resident student and rapid increases in tuition rates 1 to many observers tuition policy in public higher education appears be explained as an attempt to set tuition at whatever level is necessary to compensate for shortfalls between public appropriations and instructional expenditures ehrenberg 2006 asserts that public higher education has been buffeted by a perfect storm in which state appropriations to public higher education institutions have failed to keep pace with per student expenditures in private higher education because of economic recession the priorities placed on alternative uses of state tax revenues such as elementary and secondary education medicaid welfare and criminal justice and efforts to reduce income and sales tax rates a considerable empirical literature examines the relationship between tuition in public higher education and state appropriations koshal and koshal 2000 identify a negative relationship between tuition and state appropriation a study of college costs and prices which is conducted by cunningham et al 2001 identifies an inverse association between tuition rates and annual budget appropriations but finds little evidence of a link between tuition and expenditures on instruction lowry 2001 treats state appropriations as exogenous in a resident tuition equation and discovers a significant negative relationship between state funding and tuition rizzo 2005 finds that increases in tuition are linked to declines in future levels of state funding which hints at a dynamic association rizzo and ehrenberg 2004 in one of the more extensive examination of the topic treat real state appropriations per student as an exogenous variable in their resident tuition equation and find that schools that receive higher state appropriations per student charge lower tuition though the elasticity is far from unity acknowledging the economic and demographic conditions of public higher education and the empirical literature linking appropriations and tuition raises a number of questions what activities are legislatures supporting when they allocate public funds to higher education what are the implied responsibilities for subsidizing residents versus nonresidents how are resident and nonresident tuition rates determined and what are the relationships among tuition rates resident and nonresident enrollments and state appropriations to higher education in particular there appears to be the need to develop a better understanding of the decision processes that determine both the public subsidy and the setting of tuition rates a goal of this article is to develop a conceptual framework for that process there is a widely held notion that residents should pay a lower tuition than nonresidents and as a result of a resident subsidy they do so in nearly all public universities one rationale for favorable treatment is that residents and their parents pay state taxes another claim which receives some support by groen 2004 is that residents are likely to remain in the state after graduation and thus contribute future tax revenues although the public subsidy to higher education is justified for these and many other economic development reasons some argue that the higher education subsidy is simply a payoff to special interest groups who influence legislatures and governors friedman 1968 and goldin and katz 1998 provide a general discussion of the objectives of subsidized higher education for whatever reasons resident students continue to receive a substantial publicfinanced subsidy while nonresidents pay close to full cost there are two basic arrangements for determining tuition rates in higher education 1 institutions determine tuition rates under the direction of an independent governing board and 2 state legislatures who are governed by statues and budget policies make tuition decisions

life cycle asset accumulation and allocation in canada this paper documents the life cycle patterns of household portfolios in canada and investigates several hypotheses about asset accumulation and allocation inferences are drawn from the 1999 survey of financial security with some comparisons to earlier wealth surveys from 1977 and 1984 i find cross sectional evidence for asset decumulation at older ages when annuitized assets like pension wealth are included in the analysis i also find that the portfolio share of financial assets increases sharply with age while indicators of risk tolerance appear to decrease this is consistent with families desiring more liquid and less risky assets as they age jel classification d31 e21 g11 le cycle de vie de l accumulation et de l allocation des actifs au canada ce memoire documente le cycle de vie des portefeuilles des menages au canada et examine plusieurs hypotheses quant a l allocation et l accumulation des actifs on developpe certaines inferences a partir de l enquete sur la securite financiere de 1999 ainsi qu a partir des enquetes sur la richesse de 1977 et 1984 certains resultats pointent vers une decumulation des actifs avec l avancement de l ge quand on prend en compte dans l analyse les actifs annualises comme les rentes il semble aussi que la portion des debentures augmente dramatiquement avec l ge et que les indicateurs de tolerance de risque paraissent diminuer voila qui s arrime bien a un desir d avoir des actifs plus liquides et moins risques a mesure qu on vieillit

income inequality and health status in the united states evidence from the current population survey several recent studies have identified an association between income inequality and aggregate health outcomes this has been taken to be evidence that inequality is detrimental to individual health we use data from the 1995 99 march current population survey to examine the effect of income inequality on individual health status for both the general population and those individuals in poverty we find no consistent association between income inequality and individual health status our results contradict recent claims that the psychosocial effects of income inequality have dramatic consequences for individual health outcomes

pioneering plus a broad product line strategy higher profits or deeper losses previous research suggests firms can build a market share advantage by preempting later entrants with a broad product line and expanding rapidly into related markets whether such a strategy leads to a pioneering profit advantage relative to followers also depends on its cost effects in this paper we examine when the market share advantage of a pioneering firm with a broad product line strategy translates into a profit advantage by examining the cost effects of this strategy using the profit impact of marketing strategies data and an estimation method that controls for various unobserved factors we find significant differences between different industry settings from these contrasting findings we generate an emerging theoretical framework that we subject to empirical testing we conjecture and empirically verify that creating a broad product line with a versioning strategy creating variety from a standard product in anticipating customer demand does not increase the pioneering cost disadvantage and thus results in a pioneering profit advantage on the other hand with a tailoring strategy creating variety by customizing a product to actual customer demand a broad product line substantially increases the pioneering cost disadvantage thereby making a preemption strategy counterproductive

disentangling pioneering cost advantages and disadvantages existing literature discusses a number of possible pioneering cost advantages and disadvantages in this paper we empirically test three different sources of long term pioneering cost advantage experience curve effects preemption of input factors and preemption of ideal market space and three different sources of pioneering cost disadvantage imitation vintage effects and demand orientation we disentangle these sources by breaking total cost of a business unit into three different components purchasing production and selling general and administrative sg a costs and identifying conditions that intensify or reduce the effect of the proposed source using two samples of business units one for consumer goods and one for industrial goods we find support for five of the six sources of pioneering cost advantage and disadvantage in both samples while the advantage due to preemption of ideal market space is limited to the consumer goods sample the unconditional analysis shows a pioneering purchasing cost advantage but even larger pioneering production and sg a cost disadvantages the complexity of our obtained findings suggests that managers need to think carefully about their particular conditions before making assumptions about the cost and therefore profit implications of a pioneering strategy

determinants of healthcare spending a state level analysis within the high and rising level of healthcare spending for the us as a whole is substantial variation in spending across states yet relatively little attention has been given to the empirical analysis of interstate differences in aggregate healthcare expenditures and therefore little empirical evidence exists at the state level to guide policymakers using data for all 50 states for the year 1998 we estimate an empirical model that includes structural and reduced form healthcare spending equations and a health production function to assess the significance size and relative importance of factors that prior research indicates may play an important role in explaining interstate variation in medical care expenditures and the main pathways through which they operate our results indicate higher levels of healthcare spending for state populations with higher income less education fewer uninsured residents less healthy lifestyles larger proportion of elderly residents greater availability of medical

the dynamics of health in the british household panel survey this paper considers the dynamics of a categorical indicator of self assessed health using eight waves 1991 1998 of the british household panel survey bhps our analysis has three focal points the relative contributions of state dependence and heterogeneity in explaining the dynamics of health the existence and consequences of health related sample attrition and the investigation of the effects of measures of socioeconomic status with a particular focus on educational attainment and income to investigate these issues we use dynamic panel ordered probit models there is clear evidence of health related attrition in the data but this does not distort the estimates of state dependence and of the socioeconomic gradient in health the models show strong positive state dependence and heterogeneity accounts for around 30 of the unexplained variation in health copyright 2004 john wiley sons ltd

learning curve spillovers and market performance this paper examines the effect of learning curve spillovers on market structure and performance we derive a simple characterization of the true marginal cost for a broad class of learning curves and use calculated examples to show that spillovers substantially undercut the barriers to entry erected by proprietary learning unlike the case of cost reducing research and development spillovers also tend to improve market performance the increased efficiency of the industrywide reduction process typically outweighs the decrease in firms incentives to reduce costs by expanding output

inter vivos transfers and bequests in three oecd countries reforms reducing the generosity of pensions have distributional effects on future generations if individuals care about their descendants welfare but only affect elderly individuals if bequests are the unintentional result of precautionary savings and safety net programmes such as unemployment insurance may displace sources of private help such as that provided by living parents to their children in need this paper provides comparable measures of how expected bequests and transfers vary with cumulated parental earnings in the united states west germany and the united kingdom the strength of bequest motives is empirically very weak in the available data private inter vivos transfers which appear to depend on the recipients economic situation are partly crowded out by public unemployment insurance programmes together involuntary bequests and intentional inter vivos transfers appear to be an important channel of intergenerational inequality transmission and strengthen substantially the relationship between an individual s and his parents economic status ernesto villanueva

deconstructing the pioneer s advantage examining vintage effects and consumer valuations of quality and variety several studies have demonstrated an order of entry effect on market share suggesting that pioneers outperform later entrants however other research has pointed out the limitations of these studies and found evidence that many pioneers fail or have low market share given this background the purpose of this research is to understand the conditions under which pioneers are more likely and also less likely to have an advantage we propose a game theoretic model that includes important sources of pioneer advantages as well as disadvantages specifically we incorporate a pioneer advantage due to preemption in markets with heterogeneous tastes in addition we incorporate a potential pioneer disadvantage due to technology vintage effects where later entrants utilizing improved technology can have lower costs and higher quality the model allows us to evaluate the extent of vintage effects necessary to overcome a pioneer s advantage key relationships are found between the magnitude of the pioneer advantage or disadvantage and consumer valuations of product attributes e g variety and quality we empirically validate the model with vintage effect data in 36 product categories and measures of consumer valuations of product variety and quality for 12 of these 36 categories the results show that pioneers do better in product categories wherevariety is more important and worse in categories where productquality is more important pioneers in categories with high vintage effects are shown to have lower market shares and higher failure rates similar results appear when analyzing persistence of market leadership over time further validating our model s major implications we also present two case studies that illustrate key elements of the model

unobservable effects and business performance while unobservable factors such as corporate culture access to scarce resources management skill and luck can be postulated to be principal determinants of business success their effects are all but ignored in studies of business performance this study making use of the pims data base reports empirical evidence indicating that failure to control for unobservable factors influencing profitability both biases and exaggerates the effect of strategic factors indeed the influence of unobservable factors is so pervasive as to invalidate many of the conclusions drawn from studies failing to control for their effects

a look on the cost side market share and the competitive environment in this paper we develop a model relating market share to average costs we start with a theoretical model of the factors that affect the firm s average cost curve partitioning these factors into a measurable firm and competitive environment characteristics and b unobserved factors that are either fixed random or follow a first order autoregressive process we then link this theoretical model to an empirical model in which we specify three average cost equations for the organizational areas of purchasing production and marketing main effects for initial lagged market share position as well as their interactions with factors characterizing the firm s competitive environment represent the variables of key theoretical interest in our equations we estimate these equations using pims data and control for fixed contemporaneous and autoregressive unobservable factors our results suggest that market share can often lead to market power in the form of lower average costs however the firm s operating environment greatly moderates the effect of market share on average cost in particular we find that market share position only leads to lower average costs when the organizational unit operates in a competitive environment that gives it both motivation and ability to realize power from its market share position

order of market entry established empirical generalizations emerging empirical generalizations and future research three established and four emerging empirical generalizations are identified below the first established generalization is that there is a negative relationship between order of market entry and market share second for consumer packaged goods and prescription anti ulcer drugs the entrant s market share divided by the first entrant s share roughly equals one divided by the square root of order of market entry third in mature markets market pioneer share advantages slowly decline over time while the emerging generalizations require additional research support the initial findings suggest 1 for consumer packaged goods order of market entry has a stronger negative relationship with trial penetration than with repeat purchase 2 market pioneers have broader product lines than late entrants 3 skill and resource profiles differ across market pioneers early followers and late entrants and 4 order of market entry is not related to long term survival rates future research topics are also dis

uncertain medical expenses and precautionary saving near the end of the life cycle this paper introduces a dynamic structural model of household consumption decisions in which elderly families consider the effects of uncertain future medical expenses when deciding current levels of consumption the model with uncertain medical expenses implies a potentially important role for precautionary saving incentives to explain slow rates of dissaving among elderly americans during retirement rather than just simulating the stochastic dynamic model preference parameters are estimated using panel data on health wealth and expenditures for retired families the health uncertainty model predicts consumption levels closer to observed expenditures than a life cycle model with uncertain longevity however elderly families typically dissave their financial assets more slowly than even the baseline health uncertainty model predicts is optimal

income related inequality in life years and quality adjusted life years abstract we estimate the income related inequality in sweden with respect to life years and quality adjusted life years qalys we use a large data set from sweden with over 40 000 individuals followed up for 10 16 years to estimate the survival and quality adjusted survival in different income groups for both life years and qalys we discover inequalities in health favouring the higher income groups for men women in the youngest age group 20 29 years the number of qalys is 43 7 45 7 in the lowest income decile and 47 2 49 0 in the highest income decile

measuring heterogeneity in the returns to education using an education reform abstract in this paper we explore the impact of a mandatory education reform as well as pre reform availability of schools above the mandatory level on educational attainment and returns to education in norway we contribute to the existing literature by focusing on the heterogeneity of the impact of reforms our results indicate that increased compulsory education from seven to nine years increased the general level of education beyond the compulsory education we also find that the effect of family background on educational attainment was weaker after the reform the average treatment effect on returns to education is surprisingly high for education of intermediate duration this means that increasing the general level of education potentially generates high returns in the form of wages we also find that the effect of treatment on the treated on the returns to education is 1 4 percentage points higher than the average treatment effect

the determinants of mortality mortality rates have fallen dramatically over time starting in a few countries in the 18th century and continuing to fall today in just the past century life expectancy has increased by over 30 years at the same time mortality rates remain much higher in poor countries with a difference in life expectancy between rich and poor countries of also about 30 years this difference persists despite the remarkable progress in health improvement in the last half century at least until the hiv aids pandemic in both the time series and the cross section data there is a strong correlation between income per capita and mortality rates a correlation that also exists within countries where richer better educated people live longer we review the determinants of these patterns over history over countries and across groups within countries while there is no consensus about the causal mechanisms we tentatively identify the application of scientific advance and technical progress some of which is induced by income and facilitated by education as the ultimate determinant of health such an explanation allows a consistent interpretation of the historical cross country and within country evidence we downplay direct causal mechanisms running from income to health

the insurance value of medical innovation abstract economists think of medical innovation as a valuable but risky good producing health benefits but increasing financial risk for consumers and healthcare payers this perspective overlooks how innovation can lower physical risks borne by healthy patients facing the prospect of future disease we present an alternative framework that accounts for all these sources of value and links them to the value of healthcare insurance we show that any innovation worth buying reduces overall risk and generates positive insurance value on its own we conduct a stylized numerical exercise to assess the potential empirical significance of our insights our calculations suggest that conventional methods meaningfully understate the value of historical health gains and disproportionately undervalue treatments for the most severe illnesses where physical risk to consumers is the costliest these calculations also suggest that the value of physical insurance from new technologies may exceed the financial spending risk that they pose

mortality health status and wealth in this paper we use the two waves of the british retirement survey 1988 1989 and 1994 to quantify the relationship between socioeconomic status and health outcomes we find that even after conditioning on the initial health status wealth rankings are important determinants of mortality and the evolution of the health indicator in the survey for men aged 65 moving from the 40th percentile to the 60th percentile in the wealth distribution increases the probability of survival by between 1 0 and 1 9 percentage points depending on the measure of wealth used a similar effect is found for women of between 1 1 and 1 3 percentage points in the process of estimating these effects we control for nonrandom attrition from our sample

differential mortality and wealth accumulation the issue of asset accumulation and decumulation is central to the life cycle theory of consumer behavior and to many policy questions one of the main implications of the life cycle model is that assets are decumulated in the last part of life most empirical studies in this area use cross sectional data of estimate mean or median wealth age profiles the use of cross sections to estimate the age profile of assets is full of pitfalls for example if wealth and mortality are related in that poorer individuals die younger one overestimates the last part of the wealth age profile when using cross sectional data because means or other measures of location are taken over a population which becomes richer as it ages this paper examines the effect of differential mortality on cross sectional estimates of wealth age profiles our approach is to quantify the dependence of mortality rates on wealth and use these estimates to correct wealth age profiles for sample selection due to differential mortality we estimate mortality rates as a function of wealth and age for a sample of married couples drawn from the survey of income and program participation sipp our results show that accounting for differential mortality produces wealth profiles with significantly more dissaving among the elderly

is there a first mover advantage in science pioneering behavior and scientific production in nanotechnology this article investigates whether pioneers in a research field have a sustainable first mover advantage in publications combining bibliometric publications citations co authorship with survey data on 495 nanotechnology researchers we analyzed career attributes professional context and production overtime our econometric estimates highlight two main results first pioneering behavior is not exogenous it is more probable among scientists who are already established in their mother discipline before entering nanotechnology have a strong collaboration network and have easy access to field specific resources second even after controlling for the endogeneity of entry timing we find a strong first mover advantage pioneers in the emerging field exhibit significantly higher scientific production in that field in the long run

a median voter model of health insurance with ex post moral hazard abstract one of the main features of health insurance is moral hazard as defined by pauly pauly m v 1968 the economics of moral hazard comment american economic review 58 531 537 people face incentives for excess utilization of medical care since they do not pay the full marginal cost for provision to mitigate the moral hazard problem a coinsurance can be included in the insurance contract but health insurance is often publicly provided having a uniform coinsurance rate determined in a political process is quite different from having different rates varying in accordance with one s preferences as is possible with private insurance we construct a political economy model in order to characterize the political equilibrium and answer questions like under what conditions is there a conflict in society on what coinsurance rate should be set and which groups of individuals will vote for a higher and lower than equilibrium coinsurance rate respectively we also extend our basic model and allow people to supplement the coverage provided by the government with private insurance then we answer two questions who will buy the additional coverage and how do the coinsurance rates people are now faced with compare with the rates chosen with pure private provision

public private mix of health expenditure a political economy and quantitative analysis this paper constructs a simple model to examine decisions on public and private health spending under majority voting in the model agents with heterogeneous incomes choose how much to consume and spend on health care and vote for public health expenditure the health status of an agent is determined by a ces composite of public and private health expenditure the existence and uniqueness of the voting equilibrium are established a quantitative exercise reveals the importance of the relative effectiveness of public and private health expenditure and their substitutability in determining the public private mix of health expenditure and in accounting for the observed differences across a sample of 22 advanced democratic countries

is the first to market the first to fail empirical evidence for industrial goods businesses abstract when entering a new market the first entrant typically faces the greatest market and technological uncertainties memorable phrases reflect the associated survival risk such as the first to market is the first to fail and the pioneer is the one with the arrows in its back although research estimates the market pioneer s survival rate the typical pioneer survival rate has not been compared with that of early followers the authors study compares survival rates for 167 first entrant market pioneers versus 267 early followers for these industrial goods businesses 66 of the pioneers versus 48 of the early followers survived at least ten years the main conclusion is that the pioneer s temporary monopoly over the early followers plus its first mover advantages typically offset the survival risks associated with market and technological uncertainties these results are consistent with previous research in the sense that first mover advantages that increase a pioneer s market share also hel

average earnings and long term mortality evidence from administrative data in this paper we exploit a unique database that merges longitudinal earnings data on pennsylvanian workers with national death records to study the detailed nature of the corre lation between earnings and mortality we find that the estimates typically reported in the lit erature which are based on single years of earn ings data are likely to understate substantially the strength of the association between income and mortality in particular relative to a single year of earnings the average of earnings over a six year period predicts a 70 percent greater impact of income on mortality in addition con trolling for the mean level of earnings over a period we find that greater earnings volatility is associated with higher mortality we also examine the lag structure of the rela tionship between earnings and mortality we

do the sick retire early chronic illness asset accumulation and early retirement our objective is to determine how chronic illness affects asset accumulation and retirement previous studies have found that poor health leads to early retirement but those studies failed to look at the indirect impact of chronic illness on retirement using data from the health and retirement study we define an illness as chronic if the individual reports having asthma cancer heart disease stroke or diabetes for four or more years we first estimate how a chronic illness influences asset accumulation we then estimate how asset accumulation and current poor health influence retirement we observe that the vast majority of the chronically ill population do not report their general health to be poor nor do they report functional limitations in activities of daily living nevertheless our results indicate that chronic illness leads these people to accumulate fewer assets during their working years and consequently retire later neither researchers nor policy makers discussing the many critical issues

industry structure with sequential technology choice abstract noncooperative entry deterrence arises in a market where firms enter sequentially and irreversibly choose a technology in the case of delegated entry deterrence the earliest firms enter with a normal technology and pass on entry deterrence responsibilities to subsequent entrants in the case of partial entry deterrence the earlliest firms choose an inferior technology that allows some but not full entry of later firms with a normal technology in both cases entry is deterred in that the equilibrium number of firms is smaller than would prevail if all firms were to choose a normal technology

sequential entry with brand loyalty caused by consumer learning by using we examine first mover advantages in a new product market with sequential entry effort is necessary to learn how to use new products and consumers are assumed to differ in their ability to expend such effort we consider the intertemporal pricing strategy of the first entrant who anticipates the late entry of a rival firm the first entrant s optimal strategy is to set a low introductory price this builds up a customer base which remains loyal despite the later entry of a lower priced rival and weakens price competition between the two firms thus brand loyalty makes entry into the market easier

imitation costs and patents an empirical study it has long been recognised that the costs of imitating new products have an important effect on the incentives for innovation in a market economy as arrow i962 and others have pointed out if firms can imitate an innovation at a cost that is substantially below the cost to the innovator of developing the innovation there may be little or no incentive for the innovator to carry out the innovation in their discussions of the innovation process economists frequently have called attention to the major role played by the costs of imitation but there has been little or no attempt to measure these costs to test various hypotheses concerning the factors influencing them or to estimate their effects in this paper we report some findings of what seems to be the first study of this topic in addition we present data regarding the effects of patents on imitation costs and on the rate of innovation

wealth health and child development evidence from administrative data on swedish lottery players we use administrative data on swedish lottery players to estimate the causal impact of substantial wealth shocks on players own health and their children s health and developmental outcomes our estimation sample is large virtually free of attrition and allows us to control for the factors conditional on which the prizes were randomly assigned in adults we find no evidence that wealth impacts mortality or health care utilization with the possible exception of a small reduction in the consumption of mental health drugs our estimates allow us to rule out effects on 10 year mortality one sixth as large as the crosssectional wealth mortality gradient in our intergenerational analyses we find that wealth increases children s health care utilization in the years following the lottery and may also reduce obesity risk the effects on most other child outcomes including drug consumption scholastic performance and skills can usually be bounded to a tight interval around zero overall our findings suggest that in affluent countries with extensive social safety nets causal effects of wealth are not a major source of the wealth mortality gradients nor of the observed relationships between child developmental outcomes and household income jel codes i10 i14 j24

health and other asset holdings despite clear evidence of correlations between financial and medical statuses and decisions most models treat financial and health related choices separately this article bridges this gap by proposing a tractable dynamic framework for the joint determination of optimal consumption portfolio holdings health investment and health insurance we solve for the optimal rules in closed form and capitalize on this tractability to gain a better understanding of the conditions under which separation between financial and health related decisions is sensible and of the pathways through which wealth and health determine allocations welfare and other variables of interest such as expected longevity or the value of health furthermore we show that the model is consistent with the observed patterns of individual allocations and provide realistic estimates of the parameters that confirm the relevance of all the main characteristics of the model

pioneering and market share is entry time endogenous and does it matter dogenous variable they test the model by reestimating a recent empirical pioneering model using hausman s specification test they find statistically significant bias in the exogenous pioneering model in assessing the effect of pioneering on market share they find substantive differences between the biased and inconsistent exogenous pioneering estimates and the consistent endogenous estimates in terms of both statistical and practical significance

healthy bodies and thick wallets the dual relation between health and economic status there is abundant evidence of a quantitatively large association between many measures of economic status including income and wealth and a variety of health outcomes such as mortality or morbidity however considerable and often heated debate remains especially across disciplines about the direction of causation and about why the association arises although medical scientists are often convinced that the dominant if not exclusive pathway is that variation in socioeconomic status produces health disparities they are increasingly debating among themselves about why low economic status might lead to poor health at least for modern industrial countries 1 the old standby arguments the less well to do have access to less or lower quality medical care or a stronger pattern of deleterious personal behaviors have been rejected as insufficient instead a series of intriguing competing theories have arisen that emphasize long term impacts of early childhood or even inter uterine environmental factors the cumulative effects of prolonged exposures to individual stressful events or reactions to macro societal factors such as rising levels of income inequality a common link is that each theory attempts to document the physiological processes through which low economic status leads to poorer health while these scientific questions are extremely important this research has taken place with little input from economists economists are now making contributions about the alternative pathway the impact poor health may have on economic resources poor health may restrict a family s capacity to earn income or to accumulate assets by limiting work or by raising medical expenses at a minimum this work should provide a caution against exaggerating the magnitude of causation from economic status to health outcomes but the potential contribution runs deeper as people age the evolving variation in individual health outcomes may offer additional statistical information to estimate parameters of household savings and consumption behavior that so far have proven to be somewhat elusive thus incorporating health uncertainty and risk into economic models should eventually enrich our understanding of basic tenets of household behavior the first section of this paper documents the size of the association between health and one prominent economic status measure household wealth section two deals with how health influences economic status by sketching out reasons why health may alter household savings and eventually wealth and then providing estimates of the empirical magnitude of these effects section three shifts attention to the alternative pathway the links between economic status and health and summarizes 2major controversies and evidence surrounding these issues

life expectancy and old age savings rich people women and healthy people live much longer than their poor male and sick counterparts two extremes taken from our analysis of single people in the assets and health dynamics of the oldest old ahead dataset illustrate this point an unhealthy 70 year old male at the twentieth percentile of the permanent income distribution expects to live only 6 more years that is to age 76 in contrast a healthy 70 year old woman at the eightieth percentile of the permanent income distribution expects to live 16 more years thus making it to age 86 such significant differences in life expectancy could all else equal lead to significant differ ences in saving behavior a related observation is that people with high permanent incomes keep large amounts of assets until very late in life table 1 also based on the

uncertain health and survival effects on end of life consumption this article analyzes the impact of health and survival uncertainty on the saving and consumption decisions of retirees a dynamic programming approach is used to model the household s planning problem the utility parameters are estimated using panel data we find that a fall into poor health raises the marginal utility from consumption simulations are used to indicate the effects of falling into poor health and loss of spouse they reveal a large transfer from the healthy to the sick partner and a strong dependence of saving on the survivor benefits suggesting that concern about the surviving spouse is an important motive for saving

income productivity in china on the role of health this study provides empirical evidence regarding the income productivity of health human capital in china we appeal to concepts from human capital theory to support a basic model that treats health as a form of human capital in the income production process our model examines the economic return at the household level from the health of its individual members we estimate this with a longitudinal sample drawn from the china health and nutrition survey chns allowing us to exploit within variation in health and income to address possible unobservables biasing estimates of the impact of health on income in the simple cross sectional setting household income is strongly influenced by the health of its members particularly in rural areas these findings could have important implications for health and economic policy making aimed at reducing the long standing urban rural economic gap and more comprehensively insuring the rural population against health and economic risk

identifying generalizable effects of strategic actions on firm performance the case of demand side returns to r d spending this paper provides an approach for assessing generalizable effects of strategic actions on firm performance we identify five key issues that need to be addressed before one can have confidence in the obtained strategic generalization in addition we suggest a methodology for attacking each of these five issues we then illustrate this framework using the example of demand side returns to r d spending we document two empirical generalizations in this research first and foremost we show that demand returns to r d spending depend on whether the firm has ability and motivation to take advantage of the r d investment thus only firms with high ability and motivation leverage the r d investment into monopoly rents in the form of subsequent price increases second we show that the concept of a firm needing both ability and motivation to sustain returns from a strategic action generalizes across strategic actions we make two other conclusions about empirical approaches to strategy research first to pro

in state versus out of state students the divergence of interest between public universities and state governments abstract this paper examines the divergence of interest between universities and state governments concerning standards for admitting in state versus out of state students we find that public universities set lower minimum admission standards for in state than out of state applicants presumably in response to state pressure while private universities treat both groups equally however we also find that favoring in state applicants goes against states long term financial interest this is because marginal out of state students pay higher tuition than marginal in state students pay more in future state taxes and are equally influenced in whether they locate in the state after graduation by attending public university there

sustainable pioneering advantage profit implications of market entry order there is strong theoretical and empirical evidence supporting the idea that first to market leads to an enduring market share advantage in sharp contrast to these findings we find that at the business unit level being first to market leads on average to a long termprofit disadvantage this result holds for a sample of consumer goods as well as a sample of industrial goods and leads to questions about the validity of first mover advantage in and of itself as a strategy to achieve superior performance we replicate the typical demand side pioneering advantage but find an evengreater average cost disadvantage which is the source of the pioneering profit disadvantage in an extended analysis we show that first to market leads to aninitial profit advantage which depending on the sample or profit measure lasts for about 12 to 14 years before turning into a disadvantage moreover we show that pioneers differentially benefit from a lack of consumer learning a strong market position and patent protection these three moderating factors together can actually help pioneers achieve a sustainable profit advantage over later entrants finally we find strong support for the theoretical argument that the entry order decision should be treated as endogenous in empirical estimation

local response to fiscal incentives in heterogeneous communities abstract i examine the impact of a property tax relief program in new york state that lowered the marginal cost of school expenditure to homeowners i find that a typical school district which received 20 of its revenue through the program in the school year 2001 2002 raised expenditure by 4 1 and local property taxes by 6 8 in response to the program i then examine how the preferences of various groups of local taxpayers affect educational spending by identifying systematic variation across districts in the response to fiscal incentives these results support the hypothesis that homeowners are more influential on local expenditure decisions than renters owners of second homes or owners of non residential property

household inequality entrepreneurial dynamism and corporate financing economic theories provide conflicting hypotheses on how wealth inequality affects entrepreneurial dynamism to empirically investigate its impact we construct local measures of household wealth inequality based on financial rents home equity and 1880 farmland we identify its effects on entrepreneurship by instrumenting it with land distribution under the 1862 homestead act or us states removal of death taxes wealth inequality decreases firm entry and exit and the proportion of high tech businesses across metropolitan statistical areas there is also less redistribution into public goods supportive of entrepreneurship such as schooling and the judiciary income per capita consequently grows more slowly

market incumbency and technological inertia this paper uses a case study and a simple mathematical model to study the link between the incumbency and incentives to innovate and introduce drastically new products it identifies the conditions under which fears of self cannibalization are particularly likely to lead incumbents to soft pedal such innovations

market share pioneering advantage a theoretical approach in this paper we present an industry in which a pioneer has entered accumulated capital in the form of goodwill and in his monopoly period has also reduced his cost of production as a result of some form of learning by doing at some later date a newcomer enters his production cost is higher than that of the monopolist at that date however due to diffusion of information the costs of the two firms equate at some future date once the new firm enters the market a duopolistic game begins in which the firms choose prices and investment rates analyzing this game we discover the conditions under which the final market shares no longer depend on the order of entry the initial cost advantage the length of the monopoly period or the length of time it took the newcomer to overcome the pioneer s cost advantage we analyze the speed and pattern of convergence to the final market shares and the capital path of the pioneer in his monopoly period depending on his beliefs concerning the possibility of entry

how social security and medicare affect retirement behavior in a world of incomplete markets this paper provides an empirical analysis of how the u s social security and medicare insurance system affect the labor supply of older males in the presence of incomplete markets for loans annuities and health insurance we estimate a detailed dynamic programming dp model of the joint labor supply and social security acceptance decision focusing on a sample of males in the low to middle income brackets whose only pension is social security the dp model delivers a rich set of predictions about the dynamics of retirement behavior and comparisons of actual vs predicted behavior show that the dp model is able to account for wide variety of phenomena observed in the data including the pronounced peaks in the distribution of retirement ages at 62 and 65 the ages of early and normal eligibility for social security benefits respectively we identify a significant fraction of health insurance constrained individuals who have no form of retiree health insurance other than medicare and who can only obtain fairly priced private health insurance via their employer s group health plan the combination of significant individual risk aversion and a long tailed pareto distribution of health care expenditures implies that there is a significant security value for these individuals to remain employed until they are eligible for medicare coverage at age 65 overall our model suggests that a number of heretofore puzzling aspects of retirement behavior can be viewed as artifacts of particular details of the social security rules whose incentive effects are especially strong for lower income individuals and those who do not have access to fairly priced loans annuities and health insurance

managing new product definition in highly dynamic environments in highly dynamic environments characterized by changing customer preferences and uncertainty about competitive products managing the development of a new product is a complex managerial task the traditional practice recommended in the literature of reaching a sharp definition early in the new product development npd process may not be optimal desirable or even feasible in such dynamic situations under high uncertainty forcing early finalization of specifications may result in a firm getting locked into an incorrect definition based on our study of npd in the high technology industry we present a model of an approach called real time definition in which a firm adapts its product definition process to the market and competitive environment uncertainty in the product definition is resolved through frequent repeated interactions with customers and using a flexible development process we find that early definition is optimal only in a limited set of situations to maximize its anticipated profits a firm should tune its definition process to the prevailing level of market uncertainty the marginal value of information obtained from the customer during the npd process and its own risk profile and internal development capabilities effects of competition on a firm s definition approach are also examined and implications for managers of a npd process are presented using a conceptual framework