historical note on height and parental consumption decisions abstract with fertility a measure of the relative price between the quality versus quantity of children trade off parental consumption decisions allocating nutritional resources between generations are important in the income height relationship this paper uses data from nine european nations to explore this hypothesis

economies of scope and the cash crop food crop debate in senegal abstract the government of senegal plans to achieve national food self sufficiency by inducing farmers to switch away from cash crops toward food crop production this paper examines selected economic consequences of the planned substitution using empirical data recently collected in southeastern senegal cost function estimates suggest that farmers are currently producing too much food crop and too little cash crop output given existing technology and observed relative prices moreover economies of scope in producing both food crops and cash crops on the same farm result in a 22 cost saving relative to growing both types of crops on separate specialized farms

how valuable is a good reputation a sample selection model of internet auctions on the online auction site ebay by convention sellers do not ship goods to winning bidders until after they have received payment so there is an opportunity for sellers to take advantage of bidders trust realizing this the designers of ebay created a system that relies on self enforcement using reputation several recent studies have found that bidders give little or no reward to sellers who have better reputations i show that in fact sellers are strongly rewarded for the first few reports that they have behaved honestly but marginal returns to additional reports are severely decreasing

longitudinal studies of human growth and health a review of recent historical research longitudinal studies of health this paper reviews recent literature using stature and weight as measures of human welfare with a particular interest in cliometric or historical research we begin with an overview of anthropometric evidence of living standards and the new but fast growing field of anthropometric history this literature is always implicitly and often explicitly longitudinal in nature we then discuss i systematic empirical research into the relationship between conditions in early life and later life health and mortality and ii historical evidence on the relationship between body mass morbidity and mortality we conclude with a discussion of the importance of historical sources and understandings to health economics and population health

stature and the standard of living research on the standard of living now emphasizes alternatives or supplements to the national income accounts this paper reviews the results of two decades of research using stature as a measure of health aspects of human welfare after comparing and contrasting stature with per capita income i consider height patterns discovered by economic historians that challenge traditional beliefs about the past including long term trends cycles in heights and the dreadfully small stature of slave children that was followed by catch up growth the paper concludes with comparisons to work in development economics and suggestions for research

economic insights from internet auctions this paper surveys recent studies of internet auctions four main areas of research are summarized first we survey several studies that document and attempt to explain the frequently observed sniping or last second bidding behavior in these auctions second we summarize several methods proposed to quantify the distortions caused by asymmetric information in these markets most notably due to the winner s curse third we explore research about the role of reputation mechanisms installed to help combat these distortions finally we discuss what internet auctions have to teach us about auction design

decomposing world health inequality this study explores global inequality in health status and decomposes it into within and between country inequality we rely on standardized height as our health indicator since it avoids the measurement pitfalls of more traditional measures of health such as morbidity mortality and life expectancy it also avoids measurement problems associated with using monetary variables such as income or expenditure across time or place to compare welfare our calculation of world height inequality indicates that in contrast with similar research on income inequality within country variation is the source of most inequality rather than the differences between countries

resource shocks and human capital stocks brain drain or brain gain abstract based on the paradox of plenty resource abundant countries tend to be vulnerable for lower economic prosperity along with instable political institutions as well as corruption this paper sheds light on the relationship between resource abundance and the selectivity of migration first i combine a dutch disease model with a roy borjas model in order to elaborate on the relationship between resource shocks and migrant selectivity theoretically thereby i predict that resource booms give rise to brain drain effects which are mediated through distributional effects under certain conditions second i provide empirical evidence for the effect of resource shocks on migrant selectivity based on a structural equation model in order to disentangle effects on income inequality and migrant selectivity the results show that resource shocks especially oil booms strengthen brain drain effects in a sample with 116 source and 23 destination countries between 1910 and 2009

welfare and economic growth in kenya 1914 76 abstract in this paper we present estimates of per capita income income distribution and poverty in kenya for the period between 1914 and 1976 the estimates indicate that per capita incomes mostly increased up to 1974 inequality increased most of the time until 1950 then fell and increased again until 1971 and then finally fell poverty declined until 1964 but has since then increased slightly a decomposition analysis shows that modern sector enrichment contributed more to growth than modern sector enlargement and that traditional sector enrichment was of greater importance to the poor than modern sector enlargement

weather shocks and agricultural commercialization in colonial tropical africa did cash crops alleviate social distress a rapidly growing body of research examines the ways in which climatic variability influences economic and societal outcomes this study investigates how weather shocks triggered social distress in british colonial africa further it intervenes in a long standing and unsettled debate concerning the effects of agricultural commercialization on the abilities of rural communities to cope with exogenous shocks we collect qualitative evidence from annual administrative records to explore the mechanisms linking weather extremes to harvest failures and social distress we also conduct econometric testing on a novel panel dataset of 143 administrative districts across west south central and east africa in the interwar era 1920 39 our findings are twofold first we find robust evidence that rainfall anomalies both drought and excessive precipitation are associated with spikes in imprisonment our proxy for social distress we argue that the key causal pathway is the loss of agricultural income which results in higher imprisonment for theft unrest debt and tax default second we find that the impact of weather shocks on distress is partially mitigated by the cultivation of export crops our findings suggest that even in the british colonial context smallholder export crop cultivation led to higher private incomes as well as greater public investment our findings speak to a topic of considerable urgency today as the process of global climate change accelerates generating more severe and unpredictable climatic extremes an increased understanding and identification of adaptive and mitigating factors would assist in targeting policy interventions and designing adaptive institutions to support vulnerable rural societies

inequality of opportunity in sub saharan africa in the last decades inequality of opportunity has been extensively studied by economists on the assumption that in addition to being normatively undesirable it can be related to low potential for growth this paper evaluates inequality of opportunity and the different sources of unequal opportunities in 11 sub saharan africa countries the results indicate that the portion of total inequality that can be attributed to exogenous circumstances that is circumstances outside the control of individuals control is between 30 percent and 40 percent in the countries considered the results also indicate a positive association between total consumption inequality and inequality of opportunity finally this paper addresses a number of methodological issues that typically arise when measuring inequality of opportunity with imperfect data which is the typical case in developing countries

a new data set measuring income inequality this article presents a new data set on inequality in the distribution of income the authors explain the criteria they applied in selecting data on gini coefficients and on individual quintile groups income shares comparison of the new data set with existing compilations reveals that the data assembled here represent an improvement in quality and a significant expansion in coverage although differences in the definition of the underlying data might still affect inter temporal and international comparability based on this new data set the authors do not find a systematic link between growth and changes in aggregate inequality they do find a strong positive relationship between growth and reduction of poverty

economic development and the escape from high mortality summary this paper studies the characteristic features of the escape from high mortality as recorded from the historical experience of northwestern europe and from the current experience of less developed countries the paper documents stylized facts of mortality change and measures the contribution of economic development represented by income per capita to the mortality decline during the second half of the 20th century the paper argues that improvements in economic conditions since the 18th century are an important factor behind the decline in death rates in developed countries and in the subsequent reduction of death rates in less developed countries we show that economic development lowers mortality through differential effects in infectious disease mortality and that quantitatively income growth is able to account for between one third and one half of the recent mortality decline

pennies from ebay the determinants of price in online auctions this paper presents an exploratory analysis of the determinants of prices in online auctions for collectible united states one cent coins at the ebay web site starting with an initial data set of 20 000 auctions we perform regression analysis on a restricted sample of 461 coins for which we obtained estimates of book value we have three major findings first a seller s feedback ratings reported by other ebay users have a measurable effect on her auction prices negative feedback ratings have a much greater effect than positive feedback ratings do second minimum bids and reserve prices have positive effects on the final auction price in particular minimum bids appear only to have a significant effect when they are binding on a single bidder as predicted by theory third when a seller chooses to have her auction last for a longer period of days this significantly increases the auction price on average

the behavior of inexperienced bidders in internet auctions i introduction as has now been documented in many studies the internet auction market has quickly become a thriving marketplace in the united states the market is dominated by ebay in the second quarter of 2007 alone ebay users posted a total of 559 million listings resulting in gross merchandise value the total amount that all goods sold for of 14 46 billion 1 this impressive success has occurred despite the fact that bidders face substantial risks because of the nature of the market sellers by convention do not send goods to winning bidders until after they have received payment the seller can then simply pocket the money or send an item of poor quality a widespread and widely publicized example of this behavior occurred in 2002 when a seller with a history of over 6 000 properly conducted transactions sold hundreds of porcelain collectibles on 4 january 2002 but did not send the winners anything after receiving payments of about 300 000 2 a consumer who is defrauded by a seller has little recourse because the identity of a seller is known only through an e mail address which can be anonymously obtained 3 to solve this problem rather than formally enforcing contracts ebay has established an innovative reputation system which allows winning bidders to post ratings of sellers actions that are publicly viewable and vice versa the ratings are classified as positive neutral or negative this information is also presented as a feedback rating that is equal to the number of positive reports received from unique trading partners minus the number of negative reports received from unique trading partners 4 potential bidders can use this information to form expectations about how the seller will behave in the future and reward sellers who develop good reputations by bidding more and more often in their auctions the seller s benefits to a good reputation can come in two forms an auction can be more likely to attract bidders and thus result in a sale and bidders can be willing to bid larger amounts most studies do find that auctions are more likely to end in a sale if the seller is more reputable however the results regarding the amount by which bids increase as the seller s reputation improves have been quite mixed some find that bid amounts increase substantially as the seller s reputation improves some find extremely small increases in bid amounts and some find no increase in bid amounts at all 5 the prevalence of studies that show very small changes in bidder behavior as the seller s reputation improves has led to an apparent consensus that the returns to reputation in internet auctions are indeed quite small for example in the september 2007 issue of the journal of economic literature macleod 2007 refers to bajari and hortacsu s survey and notes that the results are rather consistent mikhail i melnik and james alto 2002 paul resnick and richard zeckhauser 2002 and luis cabral and hortacsu 2004 all find that there is a positive relationship between price and quality of the seller s reputation however the overall effect appears to be small despite this consensus recent studies favor the hypothesis that there is a significant increase in bid amounts as the seller s reputation improves melnik and aim 2005 find that the returns to an improved seller reputation increase when there is more uncertainty about product quality livingston 2005 shows that sellers are strongly rewarded for the first few reports that they have behaved honestly but marginal returns to additional reports are severely decreasing he notes that other studies may have found small increases in bid amounts because they typically assume that the relationship between the price and the number of positive reports received by the seller is linear or log linear if marginal returns to reputation are severely decreasing these functional forms may only pick up the small returns that occur after an initial reputation is established

wealth risk and activity choice cattle in western tanzania abstract imperfect credit markets force households to use their savings for investment profitable activities often require lumpy investments limiting entry by poorer households resulting in increasing welfare differences in tanzania cattle are a profitable but lumpy investment and a liquid asset for consumption smoothing richer households own substantial cattle herds while poorer households specialize in low return low risk activities a dynamic programming model and simulations are presented to analyze entry into asset accumulation under income risk the evidence suggests that households with lower endowments are less likely to own cattle and returns to their endowments are lower

promise and pitfalls in the use of secondary data sets income inequality in oecd countries as a case study this paper examines the role of secondary data sets in empirical economic research taking the field of income distribution as a case study we illustrate problems faced by users of secondary statistics showing how both cross country comparisons and time series analysis can depend sensitively on the choice of data after describing the genealogy of secondary data sets on income inequality we consider the main methodological issues and discuss their implications for comparisons of income inequality across oecd countries and over time the lessons to be drawn for the construction and use of secondary data sets are summarized at the end of the paper

longitudinal studies of human growth and health a review of recent historical research this paper reviews recent literature using stature and weight as measures of human welfare with a particular interest in cliometric or historical research we begin with an overview of anthropometric evidence of living standards and the new but fast growing field of anthropometric history this literature is always implicitly and often explicitly longitudinal in nature we then discuss i systematic empirical research into the relationship between conditions in early life and later life health and mortality and ii historical evidence on the relationship between body mass morbidity and mortality we conclude with a discussion of the importance of historical sources and understandings to health economics and population health

do cio it budgets explain bigger or smaller governments theory and evidence from u s state governments given the recent concern on big governments and rising budget deficits in the united states and european nations there has been a fundamental economic debate on the proper boundary and role of governments in a society inspired by this debate we study the relationship between information technology it and government size drawing on a broad range of the literature from multiple disciplines such as information systems industrial organization and political sciences we present several theoretical mechanisms that explain the impact of it on government expenditures using a variety of data on it spending and state government expenditures we find that greater it investments made by a state chief information officer cio are associated with lower state government spending it is estimated that on average a 1 increase in state cio budgets is associated with a reduction of as much as 3 49 in state overall expenditures this study contributes to the literature by identifying a key technological factor that affects government spending and showing that it investments can be a means to restrain government growth

does natural resource abundance increase latin american income inequality abstract why is income inequality higher in latin america than in east asia is this phenomenon related to the region s natural resource abundance is it a contributor to latin america s slow and narrowly focused human capital accumulation if so can anything be done to reverse the latin american trends or should we think of the region s fate as unalterable to help answer these questions this paper draws upon standard trade theory and cross sectional empirical analysis to demonstrate that natural resource intensive sectors particularly permanent agriculture absorb capital that might otherwise flow to manufacturing this depresses workers incentive to accumulate skill and delays industrialization

the kuznets process and the inequality development relationship abstract in his classic paper on economic growth and income inequality kuznets discussed the process of population shift from traditional to modern activities as the basis for a theory of distributional change during the course of development in this paper we present a formalization of the kuznets process conduct a general analysis of distributional change under this process and derive the functional forms of and conditions for a turning point in the inequality development relationship for six commonly used indices of inequality the functional form appropriate to each index is then estimated using cross section data on 60 developing and developed countries finally some extensions to the initial formalization of the kuznets process are considered

the kuznets curve a reassessment abstract this paper revisits the kuznets hypothesis an extensive data set containing the most recent estimates of income distribution is utilized to test the kuznets hypothesis in addition the data comparability problem with respect to income distribution data when conducting econometric analysis is addressed the results indicate that the data comparability problem is not severe enough to nullify the estimates obtained from pooled regressions the kuznets hypothesis holds for this data set

the sound of silence in online feedback estimating trading risks in the presence of reporting bias most online feedback mechanisms rely on voluntary reporting of privately observed outcomes this introduces the potential for reporting bias a situation where traders exhibit different propensities to report different outcome types to the system unless properly accounted for reporting bias may severely distort the distribution of public feedback relative to the underlying distribution of private transaction outcomes and thus hamper the reliability of feedback mechanisms this study offers a method that allows users of feedback mechanisms where both partners of a bilateral exchange are allowed to report their satisfaction to see through the distortions introduced by reporting bias and derive unbiased estimates of the underlying distribution of privately observed outcomes a key aspect of our method lies in extracting information from the number of transactions where one or both trading partners choose to remain silent we apply our method to a large data set of ebay feedback our results support the widespread belief that ebay traders are more likely to post feedback when satisfied than when dissatisfied and are consistent with the presence of positive and negative reciprocation among ebay traders most importantly our analysis derives unbiased estimates of the risks that are associated with trading on ebay that we believe are more realistic than those suggested by a naive interpretation of the unusually high 99 levels of positive feedback currently found on that system

reputation in an internet auction market i introduction without transmission of credible information asymmetries may lead to underproduction of goods or even market failure reputation mitigates inefficiencies associated with information asymmetries by providing an informative signal of quality 1 the difficulty in quantifying reputation means that few studies can analyze empirically the role of reputation in markets our analysis of a quantified market observed measure of reputation provides direct evidence of the effect of a seller s reputation on the terms of a onetime real world transaction thereby contributing empirical support to a fundamental economic principle this study empirically examines person to person transactions within the internet market known as ebay in this virtual market of unseen participants and products buyers and sellers face the risks of repudiation as the counter party may deny the agreement after the fact buyers assume risks associated with lack of seller integrity and asymmetric information about the particular product as the buyer is typically required to send payment before the seller ships the product in addition for many ebay transactions the cost of enforcing a contract is high relative to the transaction s value resulting in a practical absence of legal enforcement 2 by providing a history of trade execution information ebay benefits market participants by reducing information asymmetries while achieving substantial transaction cost economies market participants relate personal experiences which ebay uses to calculate a numerical reputation measure for each user market participants in turn can use this reputation measure to assess counter party risk and adjust bidding behavior accordingly in a sample of 460 auctions held between january 1998 and july 1998 we find a positive relation between prices and ebay s reputation measure higher reputation sellers experience higher auction prices ceteris paribus our findings suggest that repeat players are rewarded for building reputation consistent with the belief that the high reputation seller s value of future transactions outweighs the value of taking advantage of the buyer in the current transaction buyers are willing to pay more to a higher reputation seller this article contributes to the literature not only by providing quantitative support of long accepted reputation theories but also by illustrating the use of nontraditional markets as a natural laboratory for experiments this article is an example of how a newly formed electronic market can provide the elements necessary for analytical research we find that ebay transactions for this item exhibit characteristics similar to transactions in more conventional markets namely 1 prices are higher when there is less quantity supplied when fewer of the items are available the same day 2 prices are lower during periods of lower demand times less likely to have high traffic 3 sellers with higher shipping and handling costs receive lower prices and 4 sellers failing to provide information about shipping and handling fees i e larger information asymmetries receive fewer bids dramatic innovations in online market structure and increasing availability of online market data should enable researchers to examine directly other traditionally non quantifiable economic ideas this article is organized as follows section ii describes how reputation can be used to facilitate transactions in the presence of asymmetric information section iii describes the ebay market summarizes the listing and bidding processes and discusses the reputation mechanism for this market section iv presents the price and reputation descriptive statistics associated with a consistently auctioned item and reports the empirical findings of how this item s highest bid price varies with the level of the seller s reputation we conclude in section v with a discussion of ebay s continued attempts to add value to the market through recent structural changes

the effect of health improvements due to tobacco control on earnings in the united states there is minimal evidence causally estimating the relationship between tobacco tax policy population health and earnings this article uses state tobacco taxes as an instrument for life expectancy to estimate the effect on earnings per capita in a panel of almost 3000 counties in the united states over the period 1970 to 2000 in the first stage of the model we find that a one dollar increase in state tobacco taxes significantly increases life expectancy between 1 9 and 2 1 despite showing that tobacco tax is correlated with higher life expectancy and that theoretically improvements in health from reductions in smoking should lead to increased earnings we find an insignificant impact of the induced gains in life expectancy from tobacco policy on county level earnings per capita over the period 1970 to 2000 the lack of significance is explained through local average treatment effects and the smaller economic impact of certain policies that impact health later in life these results provide further

inequality in sub saharan africa new data and new insights from anthropometric estimates reliable information on inequality within countries is highly scarce especially for less developed countries ldcs using anthropometric measures we extend the inequality database for sub saharan africa to no less than 28 countries over six five year periods from 1950 to 1980 and to some 200 regions within those countries in this process we also test in depth the validity of objections against the derivation of inequality measures from height data in a second step we test the determinants of inequality within and between the 200 regions under study our set of explanatory variables includes protein supply cash cropping industrial structure mineral resources distance to the countries capital urbanization education population density and ethnic fractionalization we find that monoculture cash cropping increases inequality whereas diversified cash cropping has the opposite effect

height health and inequality the distribution of adult heights in india this paper explores the relationship between adult heights and the distribution of income across populations of individuals there is a long literature that examines the relationship between mean adult heights and living standards if adult height is set by the balance between food intake and charges to disease in early childhood it is informative about economic and epidemiological conditions in childhood because taller populations are better off more productive and live longer the relationship between childhood conditions and adult height has become an important focus in the study of the relationship between health and wealth here i follow one of the tributaries of this main stream a relationship between income and height at the individual level has implications for the effects of income inequality on the distribution of heights these relationships parallel but are somewhat more concrete than the various relationships between income inequality and health that have been debated in the economic and epidemiological literatures richard g wilkinson 1996 angus deaton 2003 if height is an increasing but concave function of income average height will be negatively related to income inequality richard steckel 1995 income inequality will also have implications for the dispersion of height so that inequality in height might serve as an indicator of inequality of income in the absence of data on the latter just as mean height might serve as an indicator of mean income aravinda m guntupalli and joerg baten 2006 and alexander moradi and baten 2005 differences in height between subpopulations such as lords and vassals or highlanders and lowlanders may also provide information on the distribution of resources between such subpopulations carles boix and frances rosenbluth 2006 in section 2 below i present a theoretical discussion of what to expect in section 3 i provide an analysis of adult heights in india where i can look at the relationship across states between a mean heights and expenditure inequality b inequality in height and expenditure inequality c men s and women s heights the difference in heights between men and women is of considerable importance in its own right india has one of the highest rates of child malnutrition in the world with around 55 percent of young children stunted a leading explanation for this is health discrimination against women vulimiri ramalingaswami urban jonsson and jon rohde 1996 if discrimination starts in early childhood and since all evidence suggests that there are regional differences in the treatment of women there should be clear traces in spatial patterns of relative heights between men and women

cash crops in developing countries the issues the facts the policies the issue of cash crops is profoundly controversial the debate uses different definitions of the term and slides across levels of analysis from the household to the international economy it also cuts across arguments crops countries and time periods this paper sets out to order the debate it deals first with definitions and taxonomy and then reviews issues connected with cash crops and a growth b distribution c food security d dependency and e the environment the paper concludes that with appropriate policies cash crops can offer a route to equitable growth