household resource allocation in stepfamilies darwin reflects on the plight of cinderella the living conditions of american children have changed dramatically during the past 50 years in 1950 the vast majority of children were born to married parents and lived with both parents until they reached adulthood today over a third of all children are born to unmarried parents and over half will live apart from at least one of their parents before reaching age 18 larry bumpass and james sweet 1989 a majority of these children will live with a stepparent or foster parent and a substantial minority will experience multiple family disruptions and multiple changes in parental personnel numerous studies have shown that remarriage is not the panacea it was once thought to be children who grow up in two parent families consisting of a biological parent and a stepparent have outcomes very similar to children who grow up with only one parent and worse than children who are raised by both of their biological parents these differences cannot be explained by differences in income since stepfamilies and original two parent families enjoy similar levels of income one explanation for why children in stepfamilies do poorly is that stepparents are less altruistic and indeed may be quite hostile toward nonbiological children according to the theory of parental solicitude such feelings are rooted in psychological mechanisms that have evolved over time through the process of natural selection thus while household incomes may be similar for biological and nonbiological children investments in children may be quite different this paper examines differences in one input food consumption between different types of two parent families using data from the panel study of income dynamics psid these data contain information on all dyadic relationships within households between 1968 and 1985 and they allow us to identify several types of parent child relationships including biological adoptive step and foster relationships the paper addresses three questions

marriage bequest and assortative matching in rural ethiopia abstract this article examines the determinants of human and physical capital at marriage using detailed data from rural ethiopia we find that assets brought to marriage are distributed in a highly unequal manner for first unions assets brought to marriage are positively associated with parents wealth indicating that a bequest motive affects assets at marriage parental wealth affects the inheritance of neither groom nor bride sibling competition from brothers affects grooms inheritance but sisters have no effect the marriage market is a major conduit for rural and gender inequality although avenues do exist for couples to accumulate wealth over their life cycle

royalty sharing and technology licensing in universities using data for 102 u s universities we show that royalty sharing arrangements cash flow rights vary substantially across universities and that they are largely unrelated to most observed university characteristics including faculty size quality research funding technology mix of the faculty and size of the technology licensing office however higher inventors royalty shares are associated with higher licensing income at the university controlling for other factors the results suggest that monetary incentives from inventions have real effects in the university sector jel o31 o34 l3 l01

cotton subsidies the wto and the cotton problem wto and the cotton problem following an 8 year long dispute over cotton subsidies brazil and the united states signed a memorandum of understanding on april 21 2010 effectively paving the way for settling the dispute this paperargues that cotton subsidies are just the tip of the iceberg while a number of other perhaps more important issues require attention and indeed political will chief among them is the persistent divergence between cotton prices and the prices of other agricultural commodities which reflects for the most part the large supply response by china and india a direct consequence of con version to biotech cotton varieties in these and other countries such response which kept cotton prices low compared with other commodities imposes a competitive disadvantage to non users of biotech cotton the paper also highlights two additional constraints faced by the cotton producing countries of west and central africa namely the structural inefficiencies of their primary processing industries also known as ginning and the appreciation of the cfa franc against the us dollar without downplaying the importance of subsidy elimination the paper concludes that these impediments should receive high priority in the policy agenda

private value of european patents abstract i examine the joint patent designation renewal behavior of the european patent office epo patent applicants during 1978 1996 using both nonparametric techniques and a parametric model the european patents granted through the epo are substantially more valuable than those through the national route value distribution of patents is highly skewed and even more so for the epo patent families the value of patent rights increases with the economic size of the country and exhibits modestly increasing returns to scale model estimation also reveals significant institutional differences across epo member countries in patent protection

son preference children s gender and parents time allocation evidence from china this article investigates the effect of children s gender on parents time allocation in developing countries due to the long existing tradition of son preference a collective model generates pred

the direction of innovation abstract how do innovation policies affect the direction of research is market based innovation too radical or too incremental we construct a novel and tractable model of the direction of innovation firms pursue inefficient research directions because they race to discover easy yet less valuable projects and because they work on difficult inventions where they can appropriate a larger portion of the social value fixing these inefficiencies requires policy to condition on properties of inventions that could have been discovered but were not policies which do not do so like patents and prizes may fail to encourage firms to research in the efficient direction even if they obtain the optimal quantity of r d

do patents over compensate innovators is the current level of patent protection too high or too low to address this issue this paper reformulates the theoretical analysis of the optimal level of patent protection to take into account the empirical findings of the innovation production function literature this literature finds a strong relationship between r d spending and inventions and estimates an elasticity of the supply of inventions of 0 5 or more the paper then assesses the current level of patent protection exploiting estimates of the private and social returns to r d taken from the empirical literature and other available sources although more research is needed for a more precise assessment the evidence available suggests that patents do not over compensate innovators vincenzo denicolo

do informal institutions matter for technological change in russia the impact of communist norms and conventions 1998 2004 summary we explore the impact of informal institutions on technological change in transition comparing the 89 regions of the russian federation we use panel data during the period of recovery and growth 1998 2004 the one country framework provides a constant background unlike for example in cross country studies against which variance in institution building may be observed property rights reform ranged from full enforcement in the northwest to blocking in communist regions in the southeast we find an unambiguous relationship between early strong reform and technological change in our model the quality of informal institutions is proxied by investment risk expertra regions rating agency

the u s patent system in transition policy innovation and the innovation process abstract this paper surveys the major changes in patent policy and practice that have occured in the last two decades in the u s and reviews the existing analyses by the economists that attempt to measure the impacts these changes have had on the processes of technological change it also reviews the broader theoretical and empirical literature that bears on the expected effects of changes in patent policy despite the significance of the policy changes and the wide availability of detailed data relating to patenting robust conclusions regarding the empirical consequences for technological innovation of changes in patent policy are few possible reasons for these limited results are discussed and possible avenues for future research are suggested

you are close to your rival and everybody hates a winner a study of rivalry in college football we use a recent survey of college american football fans to study rivalry where we find the most intense rivalries occur between in state teams relatedly within a conference fans are more likely to target rivalrous feelings toward the winningest teams and in bowl championship series conferences teams who have been conference members for a longer proportion of time while the stakes are different from other settings such as warring nations college football teams compete for resources and often have loyal followings with strong emotional ties thus examining rivalrous feeling in this setting provides insights into rivalry more generally besides being of interest in its own right as college football is a multi billion dollar industry jel l22 l83 i introduction for millions of americans saturdays in the fall are synonymous with college american football college football has a pageantry all its own as people gather in groups sometimes in excess of 100 000 to cheer for their team and socialize even though many fans have no real connection to the university on the field the teams compete to win games and over the course of a season teams compete to win their conference title however many fans do not view all opponents in the conference in the same way games against some opponents are considered more important irrespective from their impact on conference standings for example the university of arizona and arizona state university have played for the territorial cup for over 100 years 1 similarly the university of wisconsin and the university of minnesota compete for paul bunyan s axe while the university of alabama and the university of tennessee play on the third saturday in october 2 sanford and scott 2014 find that fans are willing to pay higher ticket prices for rivalry games and these games generate significant television revenue despite the amateur status of the players college football is an 8 billion industry 3 several high profile teams are valued at over 100 million dollars each brewer et al 2011 team revenue comes from a variety of sources television rights merchandising fan support etc and on the field success and profit are connected through these channels in addition teams find themselves repeatedly battling over the resources needed to compete on the field namely players and coaches in this sense football rivalries are similar to rivalries between siblings firms or nations sibling rivalries form when children compete for scarce resources financial attention etc from their parents garg and morduch 1998 morduch 2000 the cola wars between coke and pepsi and the diaper wars between kimberly clark and procter gamble arise because these comparable companies offer slightly differentiated products in the same markets rivalries between warring nations also often involve prolonged competition over scarce resources goertz and diehl 1993 klein goertz and diehl 2006 rivalry is a subjective phenomenon kilduff elfenbein and staw 2010 but it has an identifiable set of antecedents geographical proximity is typically an important determinant of conflict even in the context of firm level rivalries as argued for instance in yu and canella 2007 identity also plays an important role in the creation of a rivalry menon thompson and choi 2006 finally history and the outcomes of previous interactions are another key determinant of rivalries kahneman and miller 1986 miller and chen 1996 all three of these factors are at play in college football conferences are typically comprised of comparable schools in a particular region fans identify with their team by wearing certain clothes and in more extreme cases with body paint and other adornments despite periodic conference realignment many teams play each other year after year thus we believe that in addition to being interesting in its own right examining what drives rivalrous feelings in college football can provide insight into rivalry more generally

how valuable is patent protection estimates by technology field i present evidence on the private value of patent rights in france for different technology fields and nationalities of ownership using nonparametric techniques and a parametric model of patent renewal i find that the distribution of the value of patent rights is highly skewed that patent protection is a significant but not the major source of private returns to r d and that these characteristics vary across technology fields i compute the r d cash subsidy that is equivalent to the value of patent rights measure the variations in value of time technology fields and nationalities and show that these differences are correlated with patent grant rates

publicly funded r d programs and survival of patents i apply a survival model to a detailed data set of swedish patents to estimate how different financing factors affect the likelihood of patent renewal since the owners know more about the patents than potential external financiers there is a problem of asymmetric information to overcome this sweden has for a long time relied on government support rather than private venture capital pvc in the empirical analysis two kinds of government loans are unbundled the empirical results show that patents which have received soft government loans in the r d phase have a higher probability of expiring than patents without such financing but patents that have received more market oriented government loans during the commercialization phase are renewed for as long as other commercialized patents this finding suggests that rather than bad choices of projects it is the nature of the contract terms that explains the low renewal of some patents with government financing

capturing the margins world market prices and cotton farmer incomes in west africa summary world cotton prices soared to record levels in march 2011 reaching 2 20 a pound in contrast to 40 80 pound between 2000 and 2010 the price spike serves as a natural experiment that offers insights into the relationship between world cotton prices and producer prices in west africa a comparative study of burkina faso and cote d ivoire shows that national and regional level processes such as price setting mechanisms inequalities in knowledge and power and the oligopsonistic structure of west africa s cotton economies exert a strong influence on the share of world market prices that producers ultimately receive

the impact of bt cotton on poor households in rural india the impact of genetically modified gm crops on the poor in developing countries is still the subject of controversy while previous studies have examined direct productivity effects of bacillus thuringiensis bt cotton and other gm crops little is known about wider socioeconomic outcomes we use a microeconomic modelling approach and comprehensive survey data from india to analyse welfare and distribution effects in a typical village economy bt cotton adoption increases returns to labour especially for hired female workers likewise aggregate household incomes rise including for poor and vulnerable farmers hence bt cotton contributes to poverty reduction and rural development

hidden child labor determinants of housework and family business work of children in 16 developing countries summary two forms of hidden child labor housework and family business work are studied for 178 000 children in 16 african and asian countries about 30 of african children and 11 of asian children work over 15 h a week in hidden child labor girls are more involved in housework and boys more in family business work but this division is not strict most 80 90 of variation is due to household factors children work less in urban less traditional and more educated areas gender differences are larger in asia probably due to a stricter form of patriarchy

pathways into and out of poverty a study of rural household wealth dynamics in kenya this study identifies the factors associated with smallholder farm households that have risen out of poverty or descended into poverty between 1997 and 2007 in kenya the study uses data from a nationwide balanced panel of 1 275 households and data from detailed retrospective life history survey of 84 households that had experienced either an appreciable improvement or decline in their asset wealth over the 10 year panel period the results indicate that household welfare dynamics are associated with a disparate set of idiosyncratic and unexpected shocks such as death and chronic illness demographic factors proximity to infrastructural facilities as well as intergenerational wealth transfers

all for one family size and children s educational distribution under credit constraints this paper examines the possibility that a child s years of schooling could increase in the number of siblings instead of being diminished by competition for parents resources if unable to finance the education of their younger children parents may do so through their older children s labor income we examine this possibility in a model combining convex returns to education and credit constraints our model predicts correlations among family size years of schooling and birth order which would not exist when either of these two elements is absent empirical patterns shown in the united states mexico and south korea support the model predictions

child labour a review of recent theory and evidence with policy implications in recent years a growing number of authors have turned their attention to the question of why children work the purpose of this paper is to review some of the more recent theoretical and empirical research into the topic of child labour and to illustrate the fact that no one factor on its own can account for the phenomenon of child labour therefore policies aimed at eradicating child labour will need to address the broad range of underlying factors that contribute to the incidence of child labour such as poverty market imperfections and access to education

the global child labor problem what do we know and what can we do the problem of child labor has moved from a matter of regional and national concern to one of international debate and possible global persuasion and policy intervention in crafting policy for mitigating this enormous problem of our times it is important to start with a proper theoretical and empirical understanding of the phenomenon what gives rise to child labor and what are its consequences what interventions might end child labor without hurting children a well meaning but poorly designed policy can exacerbate the poverty in which these laboring children live even leading to starvation the article surveys the large and rapidly growing literature on this subject focusing mainly on the new literature based on modern economic theory and econometrics it also looks at some of the broad policy implications of these new findings with the objective of contributing to better informed discussion and policy design

revisiting the cotton problem a comparative analysis of cotton reforms in sub saharan africa summary the cotton sector has been among the most regulated in sub saharan africa ssa and still largely is in west and central africa wca despite repeated reform recommendations by international donors on the other hand orthodox reforms in east and southern africa esa have not always yielded the expected results this paper uses a stylized contracting model to investigate the link between market structure and equity and efficiency in ssa cotton sectors explain the outcomes of reforms in esa and analyze the potential consequences of reforms in wca we illustrate our arguments with empirical observations on cotton sector performance

the effect of sibling sex composition on women s education and earnings this paper documents the impact of siblings on the education of men and women born in the united states between 1920 and 1965 we examine the effect of the number and sex composition of a boy or girl s siblings on that child s educational attainment we find that throughout the century women s educational choices have been systematically affected by the sex composition of her siblings and that men s choices have not women raised only with brothers have received on average significantly more education than women raised with any sisters controlling for household size since sibling sex composition affects women s educational attainment and plausibly may be unrelated to other determinants of earnings it may provide a useful instrument for education in earnings functions for women our results suggest that standard estimates significantly underestimate the return to schooling for women

characteristics of patent litigation a window on competition we examine the patenting behavior of firms in an industry characterized by rapid technological change and cumulative innovation recent survey evidence suggests that semiconductor firms do not rely heavily on patents to appropriate returns to r d yet the propensity of semiconductor firms to patent has risen dramatically since the mid 1980s we explore this apparent paradox by conducting interviews with industry representatives and analyzing the patenting behavior of 95 u s semiconductor firms during 1979 1995 the results suggest that the 1980s strengthening of u s patent rights spawned patent portfolio races among capital intensive firms but it also facilitated entry by specialized design firms copyright 2001 by the rand corporation

unintended consequences of sanctions for human rights conflict minerals and infant mortality abstractare victims of human rights abuses better off with or without economic sanctions targeted at their perpetrators we study this question in the context of a us human rights policy the conflict minerals section of the 2010 dodd frank act by discouraging companies from sourcing tin tungsten and tantalum from the eastern democratic republic of the congo the policy has acted as a de facto boycott on mineral purchases that may finance warlords and armed militias we estimate the policy s impact on the mortality of children born before 2013 and find that it increased the probability of infant deaths in villages near the policy targeted mines by at least 143 percent we find suggestive evidence that the legislation induced boycott did so by reducing mothers consumption of infant health care goods and services

fertility household size and poverty in nepal population control policies keep attracting attention by increasing the household size having more children would directly contribute to a household s poverty using nationally representative household level data from nepal we investigate the links between a household s fertility decisions and variations in their size and composition we show that the relationship between number of births and household size is positive when the mothers are young but becomes negative as the mothers grow older elderly couples who had fewer children host on average more relatives who are outside the immediate family unit this result sheds light on the heterogeneous relation between the number of children and household size over the life cycle it also implies that reductions in a household s fertility may have an ambiguous impact on its per capita consumption which depends on how the household s composition responds to new births and changes over time in this sample an old household s per capita consumption is not affected by the number of births we use the gender of the first born child to instrument the total number of consecutive children

the dynamics of the transfer and renewal of patents this article explores new data on the transfer and renewal of u s patents and interprets this new evidence using a model of patent transfers and renewal we find that the proportion of transferred patents is large and differs across technology fields and especially type of patentees we also find that the probability of a patent being traded depends on a number of factors the age of the patent the number of citations received by a given age the patent generality and whether the patent has been previously traded or not these findings are consistent with the predictions of a model of patent transfers and renewals

birth spacing fertility selection and child survival analysis using a correlated hazard model if fertility reflects the choice of households results of their choice duration between successive births and health of the children cannot be considered to be determined randomly most existing studies of child health however tend to overlook the effects of fertility selection on child health this paper argues that not accounting for this selection issue yields biased estimates and it is difficult a priori to predict the direction of this bias we find that the estimates of birth spacing on child mortality are different when we do not account for fertility selection additionally the correlated hazard estimates that we present here better fit our samples than the corresponding bivariate probit estimates used in the literature a comparison of the fertility behaviour of households in the indian and the pakistani punjab highlights the differential nature of institutions on demographic transition in these neighbouring regions

patent protection market uncertainty and r d investment the real options investment theory shows that greater uncertainty about market revenues reduces current r d investment by increasing the value of waiting this paper presents empirical evidence that patent protection mitigates the effect market uncertainty on r d investment

auctioning countermeasures in the wto we offer a first formal analysis of auctioning retaliation rights within the wto we show that the auctions exhibit externalities among bidders and we characterize equilibrium bidder behavior under alternative auction formats if the violating country is prevented from bidding to retire the right of retaliation against it then the possibility of auction failure arises whereby no bids are made despite positive valuation by bidders if the violating country is instead permitted to bid then auction failure is precluded and indeed the right of retaliation is always retired we evaluate these different auction formats from normative revenue compliance efficiency standpoints

marriage institutions and sibling competition evidence from south asia using data from south asia this article examines how arranged marriage cultivates rivalry among sisters during marriage search parents with multiple daughters reduce the reservation quality for an older daughters groom rushing her marriage to allow sufficient time to marry off her younger sisters relative to younger brothers younger sisters increase a girls marriage risk relative to younger singleton sisters younger twin sisters have the same effect these effects intensify in marriage markets with lower sex ratios or greater parental involvement in marriage arrangements in contrast older sisters delay a girls marriage because girls leave school when they marry and face limited earning opportunities when they reach adulthood the number of sisters has well being consequences over the life cycle younger sisters cause earlier school leaving lower literacy a match to a husband with less education and a less skilled occupation and marginally lower adult economic status data from a broader set of countries indicate that these cross sister pressures on marriage age are common throughout the developing world although the schooling costs vary by setting

education and human capital externalities evidence from colonial benin colonial benin we investigate the effect of education on living standards occupation and political participation since both school locations and student cohorts were selected with very little information treatment and control groups are balanced on observables we can therefore estimate the effect of education by comparing the treated to the untreated living in the same village as well as those living in villages where no schools were set up we find a significant positive treatment effect of education for the first generation of students as well as their descendants they have higher living standards are less likely to be farmers and are more likely to be politically active we find large village level externalities descendants of the uneducated in villages with schools do better than those in control villages we also find extended family externalities nephews and nieces directly benefit from their uncle s education and show that this represents a family tax as educated uncles transfer resources to the extended family

school inputs and educational outcomes in south africa we examine the relationship between educational inputs primarily pupilteacher ratios and school outcomes in south africa immediately before the end of apartheid government black households were severely limited in their residential choice under apartheid and attended schools for which funding decisions were made centrally by white controlled entities over which they had no control the allocations resulted in marked disparities in average class sizes controlling for household background variables we find strong and significant effects of pupilteacher ratios on enrollment on educational achievement and on test scores for numeracy

on the optimality of the patent renewal system the patent system is mainly a renewal system the patent life is chosen by the patentee in return for fees i ask whether such a system can be justified by asymmetric information on costs and benefits of research in such a model i show that renewal mechanisms possibly with subsidies are equivalent to direct revelation mechanisms and therefore cannot be improved on regardless of the objective function under plausible circumstances patents should have a uniform life rather than varying in length as typically occurs under a renewal system

effects of a sibship extension to foster children on children s school enrolment a sibling rivalry analysis for indonesia in this paper we question whether and how the sibship extension to foster children a common practice in many developing countries affects children s school enrolment status based on indonesian data we show that children s school enrolment increases with the number of foster grandchildren in their sibship given that grandchildren fostering is associated with positive transfers from biological to host parents this result reflects either a release of liquidity constraints in the host household or the uncommon preferences of host grandparents conversely the proportion of other foster children in a sibship does not have any effect the latter result s explanation depends on the reason children other than grandchildren are fostered

the world trade organisation s doha cotton initiative a tale of two issues four west african nations have demanded that the world trade organization s doha development agenda include a cotton initiative that involves two issues cutting cotton subsidies and tariffs and assisting farm productivity growth in africa the authors provide estimates of the potential economic impacts of 1 complete or partial removal of cotton subsidies and import tariffs globally and 2 cotton productivity growth through the adoption of genetically modified gm cotton varieties they use the latest version of the gtap database and model their results confirm that unlike for other agricultural subsidies and tariffs for cotton it is subsidy reductions rather than tariff cuts that would make by far the largest impact for sub saharan africa the potential gains are huge relative to the effects on that region of reforming other merchandise trade policies and they could be more than doubled if that reform provided the cash for farmers to take advantage of the biotechnology revolution and adopt gm cotton varieties but those potential gains and the affordability of switching to costly gm seed depend crucially on the extent to which high income countries are willing to lower domestic support to their cotton farmers

the global child labor problem the problem of child labor has moved from a matter of regional and national concern to one of international debate and possible global persuasion and policy intervention in crafting policy for mitigating this enormous problem of our times it is important to start with a proper theoretical and empirical understanding of the phenomenon what gives rise to child labor and what are its consequences what interventions might end child labor without hurting children a well meaning but poorly designed policy can exacerbate the poverty in which these laboring children live even leading to starvation the article surveys the large and rapidly growing literature on this subject focusing mainly on the new literature based on modern economic theory and econometrics it also looks at some of the broad policy implications of these new findings with the objective of contributing to better informed discussion and policy design

a dynamic stochastic analysis of international patent application and renewal processes abstract this paper formulates a dynamic stochastic model to examine the joint patent application and renewal behaviors under an international patent protection regime the framework makes it possible to utilize both the cross sectional multi country application and the time series patent renewal dimensions of available international patenting data to estimate the private value of patent protection and allows us to distinguish more aspects of patent returns the evolution dynamics of the value of european patents in pharmaceutical and electronics industries are examined estimation results indicate that pharmaceutical patents are endowed with higher initial returns thus their owners tend to seek patent protection in more countries than electronics patent holders however pharmaceutical patents become obsolete at a much faster pace than electronics patents and consequently they have lower renewal rates and shorter lives

technology strategy for enhancing the public to private technology transfer evidence from the duration of patent patents are typically characterized as assets of great values nevertheless there are many patents that are actually never used in this article we claim that there is a relationship between the duration of patents and the characteristics of the underlying invention from the viewpoint of public research institutes the duration of patents may be a proxy of probability of technology transfer because the long lived patents have higher value and more chances to be transferred we characterize the patents along different dimensions captured by the renewal and application data i e collaboration scope competitiveness and attractiveness the results of hazard rate duration analysis tell us that long lived patents are characterized by being more focused having more competitiveness and being more collaborative in addition it is analysed that patents in chemical industry expire faster than those in electrical electronic industry though this fact is against the general intuition it may be reasonable fro

alimony rights and intrahousehold allocation of resources evidence from brazil can family policy affect well being of individuals without altering the resources available to their families this article examines the extension of alimony rights and obligations to cohabiting couples in brazil for women in intact relationships alimony rights upon dissolution should improve outside options strengthening their negotiating positions and increasing their influence over intrahousehold allocation of resources robust econometric evidence indicates that more decision power in the hands of women impacts hours worked by female adults and investments in the education of children this suggests that family policy and models of family decision making should take intrahousehold heterogeneity of preferences into account

do parents favor boys in an optimizing model of parental allocation systematic differences in human capital investments betwen the sexes may originate in at least 3 ways 1 parents may respond to expected gender wage differentials 2 parents may respond to systematic differences by gender in the price of human capital investments 3 parental preferences may favor girls or boys in the sense that they value identical outcomes at the same cost more highly for one sex than for the other this paper analyzes the role of parental preferences in general and unequal concern in particular in the allocation of human capital investments among children the authors generalize their earlier model of the human capital investments among children to incorporate the possibility that the returns to such investments may include not only the childs own ecpected earnings but also the expected earnings of his or her spouse thus the model assumes that parents may value returns that accrue trough the marriage market as well as through education the relevant returns to education may include marrying a spouse with higher expected earnings the empirical analysis indicates that gender wage differentials like endowment differentials are mildly reinforced by the parental allocation of human capital investments marriage market outcomes are significant determinants of the allocation of human capital investments among children there is no evidence that parental preferences favor boys this study shows that parental preferences either exhibit equal concern or slightly favor gils

testing patent value indicators on directly observed patent value an empirical analysis of ocean tomo patent auctions the valuation of patents is an important albeit challenging task extant research to identify patent value indicators has so far relied on expert estimates of patent value exploited patent renewal data or depended on more indirect measures of patent value recently specialized market places for patent transactions have emerged that allow us for the first time to directly observe patent s private value one of the most prominent market places for patents is ocean tomo a platform that offers periodical patent auctions we make use of this auction data to empirically test predictions on patent value identifiers on real world auction prices we find empirical support for forward citations and the patent s family size however both indicators explain only a small variance in patent value in contrast our full model explains a large share of variance making us optimistic that with increased directly observed patent value such models can be useful tools in patent valuation

biological basics and the economics of the family many economic models of the family are based on a generic person one person two household or parent child family rather than their anatomically correct counterparts sons and daughters fathers and mothers and grandfathers and grandmothers these economic models can offer powerful insights into family behavior but also can leave certain patterns unexplained and neglect potentially important crosscurrents melding biological insights with family economics can cast new light on existing knowledge and open up novel paths for research for example study after study has found that putting family income in the hands of mothers rather than fathers tends to increase the consumption of children as noted in this journal in lundberg and pollak 1996 yet the way such results are usually described might strike a noneconomist as exceedingly circumspect economists point out that these findings reject the common preference model of household decision making in favor of one with independent decisionmaking spouses but usually make little mention of motherhood or fatherhood per se or consider the dramatic expansion of south african government pension programs in the early 1990s which put lots of extra money in the hands of grandparents many of whom lived with their grandchildren in a compelling and oft cited study duflo 2003 found evidence of pension spillovers to grandchildren but the most intriguing patterns were demographic pensions to maternal grandmothers redounded to the benefit of granddaughters economic analysis uncovers the income effects but turns out to be of little help for explaining why these particular gender effects predominated

the value of u s patents by owner and patent characteristics abstract this paper uses renewal data to estimate the value of u s patents controlling for patent and owner characteristics estimates of u s patent value are substantially larger than estimates for european patents however the ratio of u s patent value to r d for firms is only about 3 contrary to a common assertion patents issued to small patentees are much less valuable than those issued to large corporations litigated patents are more valuable as are highly cited patents however patent citations explain little variance in value suggesting limits to their use as a measure of patent quality

business enterprise r d technological change and intellectual property protection abstract very little empirical evidence exists on the relationship between intellectual property rights and innovation existing studies tend to be indirect and do not consider the influence of iprs on innovation per se nor do they adequately allow for the endogeneity of iprs correcting for these omissions we show that the strength of intellectual property protection has a strong positive influence on innovation

recent and prospective adoption of genetically modified cotton a global computable general equilibrium analysis of economic impacts abstract this article provides estimates of the economic impact of initial adoption of genetically modified gm cotton and of its potential impacts beyond the few countries where it is currently common use is made of the latest version of the gtap database and model our results suggest that if other developing countries especially in sub saharan africa were to follow the lead of china south africa and most recently india adoption of gm cotton varieties could provide even larger proportionate gains to farmer and national welfare than in those early adopting countries furthermore those estimated gains are shown to exceed and reinforce those from a successful campaign under the wto s doha development agenda to reduce remove cotton subsidies and import tariffs globally

sibling rivalry endowment and intrahousehold allocation in gansu province china abstractthis article evaluates the strategies employed by households in rural china to allocate educational expenditure to children of different physical endowments examining whether parents use educational funding to reinforce or compensate for these differences climatic shocks are employed as an instrument for endowment measured as height for age allowing for the identification of the impact of quasi exogenous variation in endowment on parental allocations conditional on household fixed effects the results suggest that educational expenditure is directed to the relatively weaker child in response to the mean difference in height for age between siblings parents redirect around 25 of discretionary educational spending to the child with the lower height for age and this effect is robust to the potentially confounding effects of gender and birth order there is some evidence that time allocation may also be a relevant margin of compensation but no evidence that medical expenditure responds to diff

market opportunities genetic endowments and intrafamily resource distribution child survival in rural india the authors examine how intrafamily resource allocations respond to changes in economic conditions and to genetic differences in children by estimating the determinants of variations in the sex specific survival differentials of rural indian children based on standard census and household survey data they explore in particular the hypothesis that such differences are related to the relative returns to survival with households selectively allocating resources to children in response to variation in sex differences in their expected earnings opportunities as adults data are from the 1961 census and a 1971 household survey excerpt

inheritance patterns in migration prone communities of the peruvian highlands abstract on the basis of detailed information on inheritance practices collected in the course of an in depth survey of three andean communities of peru and unlike most empirical studies which rely on remittance functions we have been able to estimate an inheritance function with a view to identifying the main factors associated with particular patterns of land bequests a central result is that the positive relationship between caring and a favourable access to land bequest indeed exists yet is only observed for migrant children whether urban or rural long distance or short distance migrants combined with other findings and observations this result strengthens the case for an interpretation based on an active role of potential heirs in the determination of inheritance outcomes it therefore calls into question the strategic bequest theory which presumes that parents are the ultimate decision makers in this matter in addition our study shows that inheritance patterns are complex besides migration and caring behavior personal characteristics of potential heirs such as gender birth order and family status having children or not do appear to influence division of parental land

patent thickets courts and the market for innovation we study how fragmentation of patent rights and the formation of the court of appeals for the federal circuit cafc affected the duration of patent disputes and thus the speed of technology diffusion through licensing we develop a model of patent litigation which predicts faster settlement when patent rights are fragmented and when there is less uncertainty about court outcomes as was associated with the pro patent shift of the cafc we confirm these predictions empirically using a data set that covers patent suits in u s district courts during the period 1975 2000 finally we analyze how fragmentation affects total settlement delay considering both the reduction in dispute duration and the increase in the number of patent negotiations