occupational choice an application to the market for public school teachers most previous work on occupational choice does not satisfactorily treat the potentially important effects of future demand conditions in contrast this paper develops and estimates a rational expectations model in which agents look beyond expected starting salaries and take explicit account of future demand conditions the empirical results demonstrate that future demand conditions are important determinants of the decision to acquire secondary school certification but are not important for the decision to acquire elementary school certification the paper concludes with a comparison of the dynamic properties of the rational expectations model and a cobweb specification

50th anniversary article option pricing valuation models and applications this paper surveys the literature on option pricing from its origins to the present an extensive review of valuation methods for european and american style claims is provided applications to complex securities and numerical methods are surveyed emphasis is placed on recent trends and developments in methodology and modeling

occupational self selection a human capital approach to sex differences in occupational structure a rich and diverse literature exists concerning the distribution of labor incomes one approach namely that of human capital concentrates on lifetime accumulation paths of earnings capacity units human capital individual variations in human capital imply differences in earnings power thereby yielding strong implications concerning earnings distribution within a population despite its explanatory power the human capital model has been widely criticized one criticism centers on its inability to obtain inferences concerning occupational distribution the purpose of this paper is to alleviate at least some such criticism by applying the hedonic price approach so as to embed occupational choice into the human capital framework the significance is that neoclassical economic theory can be used to obtain implications concerning the determinants of occupational structure excerpt

factorization of european and american option prices under complete and incomplete markets abstract in a standard option pricing model with continuous trading and diffusion processes this paper shows that the price of one european style option can be factorized into two intuitive components one robust x 0 which is priced by arbitrage and a second 0 which depends on a risk orthogonal to the traded securities this result implies the following 1 in an incomplete market these parts represent the price of a hedging portfolio which is unique and a premium which depends only on the risk premiums associated with the residual risk respectively 2 in a complete market it allows factoring the contribution of the different sources of risk to the final option price for example in a stochastic volatility model we can quantify the impact on the option price of volatility risk relative to market risk 0 and x 0 respectively hence certain misspricings in option markets can be directly related to the premium 0 3 moreover these results extend to american securities which have a third component an additional early exercise premium

aging and productivity among economists economists productivity over their careers and as measured by publication in leading journals declines very sharply with age there is no difference by age in the probability that an article submitted to a leading journal will be accepted rates of declining productivity are no greater among the very top publishers than among others and the probability of acceptance is increasingly related to the author s quality rather than the author s age

obsolescence of knowledge and career publication profiles some evidence of differences among fields in costs of interrupted careers in recent years women have received about 45 percent of all baccalaureate degrees but only approximately 20 percent of all ph d s does this imply that academic careers as compared with careers of the wider market for college graduates are less conducive to dual career family objectives evidence suggesting the relative tradeoff of these objectives is shown by the fact that over the last thirty years the zero order correlation between average cohort fertility and the proportion of ph d recipients who are women is 0 939 a female recipient of a doctorate is twice as likely as a male recipient to have specialized in the humanities and only one third as likely to have specialized in a physical science field furthermore of those who receive a doctorate in physical science a male is 60 percent more likely than a female to pursue research as a primary work activity in the humanities on the other hand a woman is at least as likely as a man to have research as an initial postdoctoral work activity obviously many factors affect opportunities and resultant decisions to enter particular careers and to select specific occupational specialties this study considers only onethe rate of obsolescence or depreciation of knowledge as reflected in the age profile of cited works this measure of the obsolescence of knowledge refers to the rate of decay in the relative frequency at which citations are made to a particular vintage of research communications as the communications age in other words the usefulness of older published research papers as an input to current research depreciates over time the rate at which this depreciation occurs is interpreted as measuring the durability of a professor s accumulated stock of knowledge evidence presented in section ii indicates that the durability of knowledge varies considerably from discipline to discipline this information raises a number of questions concerning how the durability of knowledge influences career decisions one influence considered here is that of a temporary career interruption for example if a woman experiences a break in her academic career such as for the purpose of raising children she will incur an opportunity cost in the sense that her research knowledge will to some extent become obsolete consequently her accumulated stock of knowledge will decline relative to those professors who have continuous careers the relative cost imposed on a woman who pursues dual family career objectives is higher the less durable the jobrelated knowledge this difference in relative costs is expected to alter career incentives the results presented here suggest that women who pursue academic careers have responded to these incentives before discussing the evidence on female careers i consider a more general model in which a professor is assumed to have a continuous career profile this model which is more appropriately viewed as a male model of investment behavior is used to analyze how the durability of a professor s knowledge affects his research productivity over a career interestingly the evidence suggests that a professor s response to less durable knowledge is not to compact all learning early in his career but rather to smooth learning over the career perhaps the most assistant professor arizona state university i would like to thank an anonymous referee and many friends for helpful comments on earlier drafts i am especially indebted to finis welch for valuable suggestions throughout the development of this paper the views expressed are my own and i am responsible for any possible errors

does the market for women s labor need fixing t he difference in pay between men and women workers in the american economy is currently averaging 30 to 35 percent depending on the measure used underlying these large pay differences are the continuing segregation of work by sex a sparsity of promotions for women and differences in the respect accorded men and women low wages for women workers mean a low standard of living for the large and growing fraction of women who do not share the income of a husband and for the children who live with them because of their lack of access to all jobs on an equal basis women have a disproportionately small share of the interesting jobs of the jobs that allow a person to grow and to advance gains for working women are occurring but even assuming the continuation of the current rate of change the substantial equality of women and men in the labor market is decades away this article concerns the appropriate policy response to this situation some economists imply that the appropriate response is none at all they view the inferior labor market position of women as something women have freely chosen as a normal and generally benign adaptation to their responsibilities for housework and child rearing low wage work is seen as appropriate for people who behave as they do the laws against discrimination and the apparatus designed to enforce them are in this view superfluous or of minor value after all the discipline of the competitive marketplace has kept things fair and always will there is however considerable evidence for the alternative view that widespread severe ongoing discrimination by employers and fellow workers continues to hamper women if this is true systematic government action to interfere in the marketplace can be justified on grounds of equity and efficiency the question then arises as to the

applied general equilibrium models of taxation and international trade an introduction and survey we wish to acknowledge the help of three referees and of john pencavel on several earlier drafts as well as the assistance of the modelers whose work is referred to in the paper they corrected our lack of understanding of their work and provided many other helpful comments excellent research and bibliographical assistance have been provided by debbie fretz radwan shaban and janet stotsky helpful comments have been made by charles ballard michael boskin lans bovenberg sylvester damus harvey galper glenn harrison gordon lenjosek jack mutti serena ng t n srinivasan charles stuart and eric toder the authors also acknowledgefinancial support from the national bureau of economic research the national science foundation international business machines and the social sciences and humanities research council ottawa canada

the political economy of gender explaining cross national variation in the gender division of labor and the gender voting gap mainstream political economy has tended to treat the family as a unit when examining the distributional consequences of labor market institutions and of public policy in a world with high divorce rates we argue that this simplification is more likely to obscure than to instruct we find that labor market opportunities for women which vary systematically with the position of countries in the international division of labor and with the structure of the welfare state affect women s bargaining power within the family and as a result can explain much of the cross country variation in the gender division of labor as well as the gender gap in political preferences

public sector wages and bureaucratic quality evidence from latin america the purpose of this paper is to present evidence on public private wage differential for a sample of latin american countries and to discuss the relationship between public private wage differentials and bureaucratic quality in the region the paper starts by estimating public private wage differentials for a sample of 17 latin american countries covering 88 percent of the population of the region next the paper looks at the relationship between bureaucratic quality and public private wage differentials and finds that while there is no correlation between average public sector wages and bureaucratic quality there is a positive correlation between bureaucratic quality and the degree

two to tango gender differences in the decisions to publish and coauthor i introduction there is a well developed mythology regarding the presence of old boy networks and their importance in explaining gender differences in labor market outcomes as articulated by saloner 1985 nonetheless aside from works such as simon and warner 1992 there is relatively little empirical evidence examining the impact of networks on market outcomes how these effects differ by gender and whether gender differences in network access change over time as women become more well represented in a profession the paucity of empirical evidence arises in part from the difficulty of measuring the presence of such networks prior work including that of saint paul 2001 and erickson and jacoby 2003 has found evidence that networks facilitate the adoption of team oriented work practices and information sharing that increase average worker productivity in management and professional jobs on the other hand studies such as that by marmaros and sacerdote 2002 have also found that women have less access to networks than their male counterparts in both private and public sector jobs which has been shown to yield gender differences in job placement and other labor market outcomes this article considers how gender differences in networks are manifested in a specific male dominated profession i e academic economists and in a specific work related outcome i e the decision to coauthor articles in which access to networks is likely to be important the analysis uses uniquely detailed individual and job level data for phd economists included in nearly four decades of american economic association aea membership to examine the role of networks on the joint decision to publish and coauthor the unique matching process of phd economists between academic and nonacademic jobs and within the hierarchy of academic departments along with the relative ease of observing joint research provide a rare opportunity to distinguish differential network access and measure joint production the results demonstrate the importance of networks in the production of research output and that new female entrants into a male dominated profession do not have equal access to these professional networks the results also provide evidence that women are able to plug into networks over time as the profession becomes more gender representative our study contributes to the literature on the role of networks in the labor market in several ways first the profession of academic economist is well suited to this study because it is made up of workers who produce a relatively homogenous output i e scholarly journal articles and that share a common set of job related tasks i e teaching research and service second the incidence of coauthorship is an observable outcome measure of network utilization a phenomenon inherently difficult to measure in the tradition of the business productivity literature as found in sabel 1993 third there is extensive evidence in the literature that journal publications are positively linked to academic salaries as found in siegfried and white 1973 and sauer 1988 that the propensity to coauthor is positively associated with publication output as in as found in durden and perri 1995 and maske et al 2003 that there are gender differences in tendencies to coauthor as shown by ferber and teiman 1980 and mcdowell and smith 1992 and that there are gender differences in professional outcomes such as publications salary and promotion as seen in mcdowell 1982 hansen et al 1978 formby et al 1993 and broder 1993 cumulatively these studies suggest that understanding the determinants of coauthorship is important for evaluating the sources and the extent of gender inequity in the profession prior work on coauthorship behavior has analyzed patterns over time and across disciplines several studies including hudson 1996 mcdowell and melvin 1983 and barnett et al

globalization and the gender earnings gap evidence from sri lanka and cambodia disasters in bangladesh and protests elsewhere have created an intense debate about the value particularly to women of apparel employment in developing countries this paper focuses on how the forces of globalization specifically the multi fibre arrangement mfa have affected women s wages in the apparel sector in developing countries the paper uses household and labor force surveys from cambodia and sri lanka to estimate both apparel wage premiums relative to other industries and the male female wage gap before and after the end of the mfa the approach builds on new models that apply traditional trade theory e g the heckscher ohlin and stolper samuelson theorems to analyze the effect of globalization on gender based earnings the authors find large positive wage premiums and a closing of the male female wage gap during the mfa period but smaller premiums and a widening wage gap after the end of the mfa the results suggest that the benefits of apparel exports for women in developing countries remain significant post mfa they also model an approach for studying the effects of globalization that differentiates males and females as separate factors this may be a fruitful alternative to discrimination models or those that analyze the effects of globalization on women in terms of skill further research is necessary to identify the potential development effects of post mfa apparel employment and to thoroughly compare the benefits documented in this paper with the costs that may come with apparel jobs

gender differences in training capital and wages this paper constructs an equilibrium job matching model where workers differ in their attachment to the labor force the model predicts that workers with weaker attachment to the labor market will receive lower starting wages and lower post training wages and will be placed in jobs that offer less training and use less capital the implications of the model for gender differences in pay and job assignment are tested with the eopp data set ourfindings suggest that while training intensity during the first three months of employment is similar in positions filled by males and females females are employed in positions that have a shorter duration of on the job training and that use less capital these differences in on the job training and capital in positions filled by men and women as well as a lower market value for women s prior labor market experience account for a substantial part of the gap in wages between males and females

gendering the varieties of capitalism a study of occupational segregation by sex in advanced industrial societies this article explores the unintended gendered consequences of employment protection and vocational training systems it develops a micrologic of skill investment by workers and employers to identify the mechanism by which specific skills become disadvantageous for women the central claim of the article is that institutions that encourage male investment in specific skills exacerbate occupational sex segregation the article finds that coordinated market economies because of their robust institutional protection of male skill investments are generally more sex segregating than are liberal market economies the empirical section provides cross sectional analyses of advanced industrial countries

estimating gender differences in access to jobs this paper proposes a new measure of gender differences in access to jobs based on a job assignment model this measure is the probability ratio of getting a job for a female and a male at each rank of the wage ladder we derive a nonparametric estimator of this access measure and estimate it for french full time executives aged 40 45 in the private sector our results show that the gender difference in the probability of getting a job increases along the wage ladder from 9 to 50 females thus have a significantly lower access to high paid jobs than to low paid jobs

regional liberalisation of trade in services this paper investigates quantitatively the trade enhancing effect of regional trade agreements rtas under the general agreement on trade in services article v services rtas by applying a gravity regression analysis to four major services sectors financial business communication and transportation services while controlling for both country specific and time varying importer and exporter fixed effects the regression analysis covers bilateral imports in services consisting of 20 986 country pairs in total over six years 2000 05 our results indicate that sector specific trade creating effects of services rtas are significantly positive without incurring trade diverting effects excluding transportation services moreover we find that there is a significant cumulative effect of services rtas excluding communication services and a complementary relationship between goods and services imports in addition the trade creating effect of services rtas is stronger between developed members compared with between developed and developing countries

commercial policy and the domestic carrying trade in this paper the authors examine the economic consequences of existing u s restrictions on trade in domestic water transportation cabotage services they briefly trace the history of u s policy on cabotage the authors also use an applied general equilibrium model of the united states to analyze the effects of the jones act on welfare and on production trade and employment in important upstream and downstream sectors the economic effects of u s maritime policies rank them with u s trade policies like the mfa the automobile and steel quotas of the mid 1980s and agricultural import restraints coauthors are hugh m arce kenneth a reinert and joseph e flynn

detecting and removing discrimination under equal opportunities policies abstract this paper surveys part of the recent voluminous literature on the economics of discrimination focusing on two key questions first how should discrimination be measured and can in fact unambiguous estimates be derived as the basis for detecting where discrimination is present and setting in train measures to eliminate it second to what extent has the implementation of equal opportunities legislation improved the relative standing of women and minority workers in the labour force this section includes a discussion of the likely effects of recent changes in the law such as the equal value amendment in the uk or the introduction of comparable worth in the usa the survey concludes that our ability to detect discrimination at all precisely is still rudimentary and consequently policy measures are likely to be inefficient for this reason

the analytic valuation of american options no analytic solutions exists for the valuation of american options written on futures contracts and foreign currencies for which early exercise may be optimal this article formulates the american option valuation problem in economically and mathematically meaningful ways this enables us to derive valuation formulas for american options the properties associated with the optimal exercise boundary are examined and a numerical technique to implement the valuation formulas is presented article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

heterogeneous human capital occupational choice and male female earnings differences human capital models have mainly focused on the rate of return to investment in a homogeneous stock of capital yet individuals have different initial attributes that determine comparative advantage in producing different types of human capital we find that mathematical ability is an important determinant of field choice for college students and that differences in earnings across fields are largely explained as a return to the use of scarce quantitative abilities in the production of each type of human capital the model successfully accounts for the observed male female differences in earnings and occupational choices of recent college graduates

occupational transition and country of origin effects in the early stage occupational assimilation of immigrants some evidence from australia we examine the occupational attainment of recent immigrants at 2 years post migration in order to study their early stage assimilation into the labour market in australia human capital endowments and country of origin effects are examined for six occupational groups we also study transitions across occupations from source to host country the empirical approach utilizes the ordered generalized extreme value ogev model which embodies differing utility functions across occupational outcomes as well as accounting for any ordering in these outcomes the results suggest that the transferability of knowledge and skills is affected by cultural and social backgrounds and that non western immigrants are disproportionately channelled into inferior jobs post migration the investigation of the country of origin effect on the skilled migrants occupational transition process is especially apt in the context of skill shortages in many host countries

the sensitivity of american options to suboptimal exercise strategies the value of american options depends on the exercise policy followed by option holders market frictions risk aversion or a misspecified model for example can result in suboptimal behavior we study the sensitivity of american options to suboptimal exercise strategies we show that this measure is given by the gamma of the american option at the optimal exercise boundary more precisely if b is the optimal exercise price but exercise is either brought forward when or delayed until a price b has been reached the cost of suboptimal exercise is given by b b b 2 where b denotes the american option gamma therefore the cost of suboptimal exercise is second order in the bias of the exercise policy and depends on gamma this result provides new insights on american options

trade in producer services a heckscher ohlin approach trade in services has become topical but little theory has been developed this paper assumes that one commodity and the services of capital are tradable and examines the traditional trade results service trade can produce the same equilibrium as commodity trade but substantial differences exist depending on whether the tradable commodity is capital or labor intensive tariffs on either commodity have the same commodity price effects and will always increase the welfare of the immobile factor labor factor income taxes can also affect trade patterns when both goods and capital services are tradable there is an indeterminacy in trade patterns and tariffs while reducing commodity trade may not reduce welfare

on the determination of occupational attainment and mobility the underlying motivation for much of the research into the determinants of occupational attainment is to enable inferences to be made as to the relative position of various groups at a point in time or an individual s economic mobility over time in this paper we compare unordered and ordered discrete choice approaches to estimating models of occupational attainment estimates from these methods differ substantially indicating that the determination of which technique is more appropriate is an important issue the ordered method appears to be more consistent with the motivation of previous research and requires less computer time unordered models however are better able to predict occupational distribution

a cross national comparison of the gender gap in income this article examines national labor market samples from two dualist countries the united states and canada and two corporatist countries norway and sweden labor market location is less powerful in predicting income in norway and sweden where they have more inclusive employment policies in sweden though the labor market variables are more important in explaining the income gap family effects marital status and number of children are weak everywhere but especially in scandinavia nevertheless because it is encouraged by policies designed to integrate employment and family part time paid work has a major effect on the gender gap in income in norway and sweden women however pay more of a penalty than men for part time employment in north america

government employment and the provision of fringe benefits this study uses individual level data from the united states to examine the influence of government employment on the provision of five major fringe benefits four of the five benefits are more likely to be provided to government workers than to their private sector counterparts unlike wage comparisons which typically find substantial overpayment only for federal workers the findings suggest that past wage differentials underestimate the true compensation advantage enjoyed by government workers

gender differences in market competitiveness in a real workplace evidence from performance based pay tournaments among teachers recent lab and field experiments suggest that women are less effective than men in a competitive environment in this paper i examine how individual performance in a real work place is affected by a competitive environment and by its gender mix the competition is among math english and language teachers who participated in a rank order tournament that rewarded teachers with large cash bonuses based on the test performance of their classes the evidence suggest that the average ranking winning rate and awarded prize did not differ by gender nor between teachers in competition groups with only female teachers or with both genders i also find that the direct impact of the bonus program on students outcomes did not vary by male and female teachers or by the type of competitive environment in terms of gender mix of the participants as for mechanisms that can explain these results i found no differences by either gender or by the gender mix of the competition group in teachers awareness and familiarity with the program and its rules and in effort and teaching methods women though were more pessimistic about the effectiveness of teachers performance pay and more realistic than men about their likelihood of winning bonuses

publish or perish what the competition is really doing this study provides comprehensive publications performance data over a twenty five year period for finance doctorates these data indicate that publishing one article per year in any finance journal or finance accounting economics or business journal over any prolonged period of time is a truly remarkable feat met by only 5 percent of the graduates tenure screens combining various quantity and quality requirements are examined to assess their ability to predict future publication productivity faculty and administrators seeking defensible benchmarks for evaluating faculty research productivity in finance will find that these data and results are particularly useful copyright 1992 by american finance association

evaluating an alternative risk preference in affine term structure models dai and singleton 2002 and duffee 2002 show that there is a tension in affine term structure models between matching the mean and the volatility of interest rates this article examines whether this tension can be solved by an alternative parametrization of the price of risk the empirical evidence suggests that first the examined parametrization is not sufficient to solve the mean volatility tension second the usual result in the estimation of affine models indicating that some of the state variables are extremely persistent may have been caused by the lack of flexibility in the parametrization of the price of risk term structure models have several uses including pricing fixed income derivatives managing the risk of fixed income portfolios and detecting relationships between the term structure of interest rates and macrovariables such as inflation and consumption to perform well in these tasks term structure models must be numerically and econometrically tractable while matching the empirical properties of the term structure movements at least two empirical properties of the term structure of interest rates have been well established by financial economists over the years see dai and singleton 2003 for a survey first the term premium or the expected excess return of treasury bonds has a high time variability second the volatility of interest rates is time varying these two properties are so prominent in the data that they will be referred to as stylized facts while these two stylized facts are very well established in the empirical literature affine term structure models are thoroughly discussed in the theoretical literature affine models are those in which the yield of zero coupon bonds are affine functions of the model state variables classic

joint costs and intra tariff cross subsidies the case of liner shipping the problem of allocating joint costs arises in attempts to analyse the profitmaximising behaviour of multiple product firms if the production occurs in technically fixed proportions so that an increase in the output of any one product always entails an increase in the output of all other products 1 then it is invalid to attempt to separate costs in a manner which assumes away the indivisibilities 2 in such circumstances it is therefore not possible to determine unambiguously the marginal cost of the separate products and any attempt to use such estimates to represent normative prices is untenable as an objective statement 3 thejoint cost problem is less pressing in the perfectly competitive case as the long run equilibrium requires that the marginal cost of producing the joint bundle is equal to the price at which the marginal unit of the joint bundle is sold and the relative prices of the outputs contained in the bundle can be determined from the respective demand functions if however the firm is not operating in a perfectly competitive environment then the possibility of price discrimination between different buyers of any one product cannot be dismissed and if it does exist monopoly power cannot be measured in terms of the relationship between long run marginal cost and prices when the firm s outputs are joint products similarly a further segmentation of the market according to common products 4 with the prices of some products in excess of their separable costs will not necessarily reveal the extent of monopoly profit if the firm charges different prices for different products5 only to the point of allocating fully the joint costs with gross revenue exactly equal to the minimum return required for sustained operation in the long run then the firm s prices can be considered to be equivalent to the perfectly competitive

applications of option pricing theory twenty five years later nobel lecture to the memory of alfred nobel december 9 1997 this abstract was borrowed from another version of this item

the effect of gender sorting on propensity to coauthor implications for academic promotion a cohort sample of ph d economists indicates a significant propensity for researchers to select coauthors of the same sex this gender sorting contributes to lower article production for women further we find evidence of bias in academic promotion when single authored and coauthored articles carry the same weight in promotion and salary decisions the evidence explains in part why women academics wait longer for promotion and are not as likely to be promoted as men among the effects of gender sorting is self selection of women into larger departments where they are more likely to find colleagues of the same sex

efficiency and distributional implications of global restrictions on labour mobility calculations and policy implications abstract in this paper a procedure for calculating the annual efficiency gains from various alternative changes in existing global immigration restrictions is presented along with an evaluation of impacts of wage rate changes on non migrating labour a simple methodology uses data on u s dollar gnp capita across countries to infer differences in the marginal productivity of labour both between countries and across major world trading areas two key assumptions used are that the worldwide labour supply is fixed and full employment occurs in all regions differences occuring in labour s marginal product across regions are assumed to arise because of barriers to inward mobility of labour in high wage countries when these are removed labour reallocates and efficiency gains occur while the calculations are based on contentious assumptions a striking feature is the size of the annual worldwide gains in some cases annual gains can easily exceed existing worldwide gnp generated in the presence of labour mobility restrictions while all gains do not accrue to ldc s the size of the gains nonetheless suggests that this issue may be much more important to these countries than other issues raised thus far in the north south debate the losses to labour already employed in high wage countries dramatize the incentives for labour unions in the developed world to oppose liberalization

optimal scientific production over the life cycle the paper develops an optimization model of the career of a scientist recognizing that research efforts and networking get more efficient if the scientist is more knowledgeable history dependent solutions are developed we give a theoretical underpinning of the four different research patterns detected in way et al 2017 proceedings of the national academy of sciences if the scientist does not bother about his reputation at the end of his career we show that a sufficient education level is needed for the scientist to develop a typical research pattern where productivity increases in the beginning of his career while it declines towards retirement if the education level is not sufficient a fading research pattern will result where productivity declines over time on the other hand when the scientist appreciates to have a good reputation at the end of his career sufficient education will result in increasing productivity over the career lifetime preventing a midlife slump

research productivity over the life cycle evidence for academic scientists the relationship between age and the publishing productivity of ph d scientists is analyzed using data from the survey of doctorate recipients national research council and the science citation index the longitudinal nature of the data allows for the identification of pure aging effects in five of the six areas studied life cycle aging effects are present only in particle physics where scientists often speak of being on a religious quest is the indication that scientific productivity is not investment motivated vintage effects are also considered the expectation that the latest educated are the most productive is not generally supported by the data copyright 1991 by american economic association

china s service trade this paper assesses the performance of china s service trade over recent decades by summarizing and presenting data on its size growth rate sectoral composition comparative advantage and degree of openness the evidence based on comparative analysis suggests that despite china s high growth rate the development of china s service trade lags behind its merchandise trade with a policy environment adjusted in china s 12th 5 year plan a growing significance of china s service trade to both china and the global economy is likely under the prospective development strategy china s service trade has already had large impacts on china s economic growth employment and technology diffusion we suggest that even more major impacts will follow in the years to come and that there are implications for global trade fdi and labor migration

investment and interruption effects of the us experience on the earnings of return migrants in mexico migration is widely viewed as an investment in human capital however due to the imperfect transferability of skills and knowledge across countries migration trips are also career interruptions especially for return migrants who may meanwhile experience depreciation of home country specific skills this article demonstrates that migration experience increases return migrants earnings in the home country on the condition that the migration stay is sufficiently long and mostly uninterrupted employing the revised human capital earnings function the empirical study shows that only a barely interrupted us experience longer than five years regardless of the legal status of the migration trips predicts higher earnings of male return migrants in mexico than comparable non migrants robust findings emerge controlling for unobserved individual acteristics or using instrumental variables to deal with the self selection and endogeneity short migration stays in the us and frequent traveling provide

gender and promotion in the economics profession the authors use unique panel data on american economic association members to test for gender differences in promotion in a profession with a well defined promotion and job hierarchy and in which men and women exhibit similar labor market attachment the results suggest that over the period from the 1960s through the early 1980s female economists had lower levels of professional attainment and career advancement than did their male colleagues with similar attributes these gender differences remain in evidence despite controls for unobserved heterogeneity and self selection between academic and non academic jobs there is evidence however that promotion prospects for female economists significantly improved during the 1980s not only at all ranks but also within both ph d granting institutions and non ph d granting institutions in fact the results reveal no unexplained gender specific differences in promotion by the end of the 1980s

pricing and hedging in incomplete markets abstract we present a new approach for positioning pricing and hedging in incomplete markets that bridges standard arbitrage pricing and expected utility maximization our approach for determining whether an investor should undertake a particular position involves specifying a set of probability measures and associated floors which expected payoffs must exceed in order for the investor to consider the hedged and financed investment to be acceptable by assuming that the liquid assets are priced so that each portfolio of assets has negative expected return under at least one measure we derive a counterpart to the first fundamental theorem of asset pricing we also derive a counterpart to the second fundamental theorem which leads to unique derivative security pricing and hedging even though markets are incomplete for products that are not spanned by the liquid assets of the economy we show how our methodology provides more realistic bid ask spreads

nontraded asset valuation with portfolio constraints a binomial approach we provide a simple binomial framework to value american style derivatives subject to trading restrictions the optimal investment of liquid wealth is solved simultaneously with the early exercise decision of the nontraded derivative noshort sales constraints on the underlying asset manifest themselves in the form of an implicit dividend yield in the risk neutralized process for the underlying asset one consequence is that american call options may be optimally exercised prior to maturity even when the underlying asset pays no dividends applications to executive stock options eso are presented it is shown that the value of an eso could be substantially lower than that computed using the black scholes model we also analyze nontraded payoffs based on a price that is imperfectly correlated with the price of a traded asset the economics of asset pricing when one or more of the assets in the opportunity set are either subject to trading restrictions or entirely nontraded is a matter of great interest viewed from a practical perspective we have several important examples of such assets that are subject to trading restrictions pensions which represent perhaps the most significant of assets held by individual households are subject to trading restrictions it is typically the case that assets in pensions are not available for immediate consumption borrowing against pension assets is subject to significant direct and indirect costs by way of taxes and early withdrawal penalties human capital is another example housing investment is also illiquid and subject to significant transaction costs together pensions human capital and housing constitute a substantial part of a typical household s assets the significance of such nontraded assets for risk premia has already been noted by bewley 1982 there are other circumstances where lack of unrestricted trading plays an important role executive compensation plans usually take the this article was presented at boston university we would like to thank the editor bernard dumas and two anonymous referees for very helpful comments we also thank nalin kulatilaka and seminar participants for useful suggestions ganlin chang fei guan and carlton osakwe provided valuable research assistance j detemple acknowledges support from the social sciences and humanities research

male female supply to state government jobs and comparable worth the proportion of women in state government jobs and applicant pools is well explained by a model emphasizing supply side factors relative to men women s supply is least sensitive to wages in predominantly male jobs and most sensitive to wages in predominantly female jobs these results suggest that comparable worth policies that shift relative pay toward traditionally female jobs and away from traditionally male jobs will increase the proportion of females in male dominated female dominated and total state government jobs the implication is that supply side responses need not prevent comparable worth pay adjustments from raising total female compensation

the wage effects of cumulative job mobility this analysis of data from the national longitudinal survey of youth shows that cumulative job mobility had statistically significant effects on wages in the years 1979 88 the direction of the wage effects positive or negative and their magnitude varied depending on the type of cumulative mobility examined employee initiated versus employerinitiated separations economic versus family related quits layoffs versus discharges the results also indicate that although men and women had different mobility histories men for example had been discharged more often than women and women had quit for family related reasons more often than men the wage effects of each type of cumulative mobility economic quits family related quits layoffs and discharges were similar for men and women tn this paper we examine the impact of cumulative job mobility on the subsequent wages of young men and women most previous work on this subject has focused on the impact of specific mobility events such as quits or layoffs rather than on the impact of total job history on wages researchers looking at single mobility decisions have consistently reported evidence that a change in employers does affect a worker s subsequent wage therefore it is reasonable to ask whether the impact ofjob change is cumulative that is does a worker s current wage reflect the impact of all past mobility decisions quits layoffs and discharges also since most of the

gain loss and asset pricing we develop an approach to asset pricing in incomplete markets that bridges the gap between the two fundamental approaches in finance model based pricing and pricing by no arbitrage we strengthen the absence of arbtrage assumption by precluding investment opportunities whose attractiveness to a benchmark investor exceeds a specified threshold in our framework the attractiveness of an investment opportunity is measured by the gain loss ratio we show that a restriction on the maximum gain loss ratio is equivalent to a restriction on the ratio of the maximum to minimum values of the pricing kernel by limiting the maximum gainloss ratio we can restrict the admissible set of pricing kernels which in turn allows us to restrict the set of prices that can be assigned to assets we illustrate our methodology by computing price bounds for call options in a black scholes economy without intermediate trading when we vary the maximum permitted gainloss ratio these bounds can range from the exact prices implie

what matters most teaching or research empirical evidence on the remuneration of british academics this paper examines the impact of productivity on pay within academia drawing upon a detailed dataset of academics from five old established universities results outline the importance of publication grant receipt and teaching quality in the determination of pay a large financial penalty to time out of the profession is revealed which with productivity variables explains away the gender salary gap the relationship between teaching and research is investigated and we find some evidence in support of the hypothesis that productive researchers are successful teachers results on reservation salary suggest that the best academics are willing to stay within the profession

does household labour impact market wages this study investigates the hypothesis that women s greater home responsibilities contribute directly to their lower wages because household labour time reduces their market effort ols regressions show a significant negative effect of household labour hours on market wages for white married women but not for other groups of women single black or men regressions correcting for endogeneity of household hours in the wage equation or heterogeneity among women indicate there is no significant effect of household labour hours on wages for any demographic group these results suggest that the evidence in support of the hypothesis is not compelling

women s wages in women s work a u s canada comparison of the roles of unions and public goods sector jobs in this paper we investigate the mechanism by which the femaleness of occupations has a negative effect on women s wages we relate us canada differences in labor market institutions the returns to skills and other dimensions of the wage structure such as occupational rents to corresponding differences in the rewards to female jobs our analysis which uses us data from the cps org for 1988 and canadian data from the 1988 lmas uncovers intriguing us canada differences in the effect of occupational gender composition on women s wages the estimated effect for canadian women is generally small and not statistically significant while estimates for american women are relatively large and comparable to the evidence in previous studies relating these differences to cross country variation in other wage determinants reveals that higher rates of unionization and the higher occupation wage effects for certain public good sector jobs such as educational services work to the advantage of canadian women we also find that the relatively higher pay of integrated jobs in the united states helps account for the larger negative effect of gender composition on women s wages in this country dans cet article nous etudions le mecanisme par lequel le taux de feminite des occupations peut avoir un effect negatif sur les salaires des femmes nous utilisons une comparaison internationale etats unis canada pour relier les differences institutionnelles du marche du travail les differences dans les rendements des qualifications et dans d autres dimensions de la structure salariale comme les rentes occupationnelles a des differences dans la remuneration des emplois a predominance feminine notre analyse qui utilise les donnees americaines provenant des cps org pour 1988 et les donnees canadiennes provenant de l enquete sur l activite aussi pour 1988 demontre l existence de differences interessantes entre les etats unis et le canada quant a l effet du taux de feminite des occupa this abstract was borrowed from another version of this item

estimating a dynamic adverse selection model labour force experience and the changing gender earnings gap 1968 1997 this paper addresses two questions what accounts for the gender gap in labour market outcomes what are the driving forces behind the changes in the gender labour market outcomes over the period 1968 1997 it formulates a dynamic general equilibrium model of labour supply occupational sorting and human capital accumulation in which gender discrimination and an earnings gap arise endogenously it uses this model to quantify the driving forces behind the decline in the gender earnings gap and the increase in female labour force participation the proportion of women working in professional occupations and hours worked it finds that labour market experience is the most important factor explaining the gender earnings gap in addition statistical discrimination accounts for a large fraction of the observed gender earnings gap and its decline it also finds that a large increase in aggregate productivity in professional occupations plays a major role in the increase in female labourforce participation number of hours worked and the proportion of females working in professional occupations although of less importance demographic changes account for a substantial part of the increase in female labour force participation and hours worked whereas home production technology shocks do not

tight bounds on american option prices in contrast to the constant exercise boundary assumed by broadie and detemple 1996 broadie m detemple j 1996 american option valuation new bounds approximations and comparison of existing methods review of financial studies 9 1211 1250 we use an exponential function to approximate the early exercise boundary then we obtain lower bounds for american option prices and the optimal exercise boundary which improve the bounds of broadie and detemple 1996 with the tight lower bound for the optimal exercise boundary we further derive a tight upper bound for the american option price using the early exercise premium integral of kim 1990 kim i j 1990 the analytic valuation of american options review of financial studies 3 547 572 the numerical results show that our lower and upper bounds are very tight and can improve the pricing errors of the lower bound and upper bound of broadie and detemple 1996 by 83 0 and 87 5 respectively the tightness of our upper bounds is comparable to some best accurate efficient methods in the literature for pricing american options moreover the results also indicate that the hedge ratios deltas and gammas of our bounds are close to the accurate values of american options

earnings profiles of department heads comparing cross section and panel models academics who become department heads suffer declining research skills because of time spent performing administrative tasks and this skill depreciation slows future wage growth this study examines kansas state university faculty who served as department heads during the period 1965 92 cross section estimates of the compensation for serving as department head are biased upward because of a correlation between unmeasured productivity characteristics and selection as department head to correct for this bias the authors reestimate earnings equations using a panel model that incorporates personal fixed effects although the average department head in the sample received a wage premium of 12 the premium for past administrative service had completely disappeared for the typical former head another finding is that skill depreciation was most severe and wage growth most adversely affected in the sciences as compensation department heads in the sciences received a larger initial administrative premium th

assessing the benefits to developing countries of liberalisation in services trade this paper discusses the potential impacts of services trade liberalisation on developing countries and reviews existing quantitative studies its purpose is to distill themes from current literature rather than to advocate specific policy changes the picture emerging is one of valiant attempts to quantify in the presence of formidable analytical and data problems yielding only a clouded image of likely impacts on trade consumption production and welfare emerging to the point that the policy implications of results are not always clear a central intuition would seem to be that with genuine two sided oecd non oecd liberalisation in services that are seemingly considerably labour intensive in delivery the potential should be there for significant developing country gains from global liberalisation allowing full cross border delivery however this picture is neither fully endorsed by available studies neither is it explicitly contradicted this seems to be the case for a number of reasons one difficulty with the studies is that the conceptual underpinnings of what determines trade in services and how this trade differs analytically from that of trade in goods if at all is an issue prior to assessments of impacts of liberalisation of trade in services on developing countries being discussed key issues here are the treatment of mobility for service providers both firms and workers and the differing analytical structures needed to analyse individual service items banking insurance telecoms etc some recent analytical work suggests that liber alisation in some service items such as banking need not always yield gains and this contrasts with quantitative studies where analytical structures mirror conventional trade in goods treatments the discussion and measurement of barriers to service trade in both developed and developing countries is also problematic one is talking of domestic regulation entry barriers portability of providers competition policy regimes more so than only barriers at national borders as with tariffs both representing and quantifying such barriers raise major difficulties and these are also spelled out in the paper which barriers actually restrict trade and which do not because they are redundant is one issue for instance it is also often misleading to represent barriers in simple ad valorem equivalent form as a result numerical modelling work on the effects of service trade barriers which is based on ad valorem equivalent modelling is often not fully convincing in addition individual country results vary considerably across studies in ways that it is frequently hard for outsiders to understand studies do however point towards a tentative conclusion that effects are small and positive for developed and most developing countries if fdi flow changes accompanying service trade liberalisation are excluded from the analysis but much larger and more variable across countries if they are present this could be taken to suggest that mode 3 gats liberalisation roughly captured in some studies might be important for developing countries but mode 4 gats liberalisation could be even more important given large barriers to labour flows across countries thus if service trade liberalisation is thought of primarily as a surrogate for improved functioning of global factor markets in which more capital flows to developing countries and more labour flows from them to developed countries then developing countries could benefit in a major way from genuine two sided oecd non oecd liberalisation developing countries fear however that in global negotiations on services liberalisation where there is an asymmetry of power that largely one sided liberalisation may be the outcome and their gains will be correspondingly limited the paper concludes by evaluating econometric studies on linkage between services liberalisation and country growth rules and briefly discusses some key sectoral issues in health services and transportation

the gender wage gap among phds in the uk this article analyses the gender wage gap gwg among phd graduates in the uk 42 months after their graduation in 2004 5 we find a sizeable overall gwg of 19 log percentage points which is explained by a large wage premium for men outside academia compared to women and men in academia the gwg in academia is small in comparison whilst the gwg outside academia is very high six months after graduation and remains largely unaltered the gwg inside academia doubles in the following three years the oaxaca decomposition suggests that for this relatively homogeneous group the gwg cannot be explained by differences in endowments university and employment characteristics we find stark differences in wage patterns between the fields of study and a strongly increasing coefficient effect for higher quantiles

bending the pipeline executive search and gender inequality in hiring for top management jobs we study the sources of women s underrepresentation in hiring for top management jobs by focusing on the context of executive search using data that include proprietary information on 10 970 individuals considered by a search firm we examine the sources of the low proportion of women placed in senior roles contrary to received wisdom we find limited evidence that demand side screeners strongly contribute to gender disadvantage in this setting what gender differences exist tend to play out at the start of the hiring process and are driven both by supply side and demand side actors once considered for a position women are no less likely than men to be hired though they are slightly less likely to be interviewed by the search firm our findings highlight the theoretical importance of disentangling candidates self steering behavior from the pipeline bending of hiring agents we discuss the implications of our results for understanding gender inequality at upper echelons of the labor market this p

the implementation process of comparable worth winners and losers this paper provides a unique opportunity to observe how a public policy affected the earnings of various interest groups at different stages of implementation specifically we examine how the earnings of women union members and supervisory and professional staff were affected by various proposed and implemented comparable worth pay plans in iowa we find that large relative gains to women in the original proposed plans were reduced as the process evolved as a result some of the original gains to women were redistributed to union members supervisors and professionals

an analysis of workers choice between employment in the public and private sectors this paper estimates the extent to which workers with different personal characteristics are likely to be employed in the public versus the private sector the author develops a reduced form two wa

life cycle productivity in academic research evidence from cumulative publication histories of academic economists casual observation suggests that the temporal pattern of productivity varies dramatically across individuals particularly in risky endeavors such as a research career in academia some individuals remain productive researchers throughout their career others who show early promise become deadwood before their time some authors produce papers like a well oiled machine while others publish at a highly erratic rate opposing this is a widely held view that there is a common life cycle component underlying individual productivity the aging process itself is thought to lead to the initial rise and eventual decline of creative productivity in addition human capital models typically imply that investment in skills will decline with age 7 both of these ideas suggest that output will be hump shaped over the life cycle econometric studies of life cycle productivity have addressed this with regressions which are quadratic functions of age or experience 1 5 the quadratic conveniently delivers the sought after hump shaped pattern in productivity there are conceptual problems with the quadratic however it implies a symmetric output path centered on its peak which is inappropriate if productivity peaks early in the career but remains significant thereafter in addition data on publishing productivity is heavily affected by the zeros problem the most common number of publications for an active professor in any given year is zero this requires an estimation procedure designed to accommodate a high probability mass at zero levin and stephan 5 address this problem with the tobit regression the tobit is a truncated regression model where in this context publications are distributed as a truncated normal random variable if a vector combination of attributes and coefficients exceeds a threshold level and are zero other

cracks in the glass ceiling gender and promotion in the economics profession gender differences in promotion within the economics profession have long been a concern of the committee on the status of women in the economics profession cswep in a descriptive analysis of the aea universal academic questionnaire rebecca blank 1996 finds that hires and promotions to the associateand fullprofessor levels have averaged 4 2 and 2 7 percentage points below the share of female assistants and associates professors respectively thus women appear to be underrepresented in senior positions suggesting they may face a glass ceiling this paper uses unique panel data for american economic association aea members to examine formally whether there are differences across gender in promotion probabilities an academic labor market beyond its direct interest to economists is well suited to study possible gender differences in promotion because departments can be ranked within the profession and because professors can be ranked within a department by a welldefined promotion hierarchy a focus on academic economists offers an additional advantage in that on the job productivity can be measured directly by research output other promotion studies have had limited controls for productivity and have used cross sectional data which do not permit controls for unobserved ability e g rudolf winter ebmer and josef zweimuller 1997 failure to account for gender differences in unobserved productivity could produce biased inference prior promotion studies also have generally relied on job advancement indexes that limit the distinction between initial job assignment i e an

the causes and consequences of occupational segregation a simultaneous equations approach lewis and shorten applied economics 1991 23 167 77 have proposed that male and female earnings male and female labour force participation rates and occupational segregation are simultaneously determined in the labour market they estimate their model for australia using 1981 census data and find substantial evidence to support their hypothesis however there have been no subsequent studies to empirically test their hypothesis for other countries in this paper their model for the united states using 1990 census data is replicated all but one of the coefficients on the endogenous variables have the same signs as those reported by lewis and shorten which tends to support their model the specification of lewis and shorten s model is tested and it is inappropriate for the us data the model is then reformulated and re estimated the reformulated model also shows substantial evidence of simultaneity between occupational segregation and other labour market outcomes

short term employment transitions of women in the israeli labor force using data on jewish israeli women aged 25 to 55 the author examines patterns and determinants of women s transitions among four employment categories regular full time employment reduced hours full time employment part time employment and non employment israeli women are not trapped in part time employment departures from reduced hour and part time employment occur at higher rates than departures from full time jobs women who have just given birth have an increased likelihood of moving from full time employment to reduced hour or part time employment women in female type occupations and those in peripheral jobs jobs outside core industries are more likely than other women to reduce their work hours or exit the labor force the author argues that although part time work is a valuable short term option for many women in the long run it preserves labor market institutions that are disadvantageous to women

productivity of highly skilled immigrants economists in the postwar period larry d singell jr prior work finds declining immigrant quality in the postwar period that is linked to source country and skill composition changes associated with the 1965 immigration act this paper uses a unique panel of foreign and native born american economic association members to show that the highly skilled experienced a similar shift away from european migrants toward those from asia however the findings do not indicate that this change in source country composition has been accompanied by a decline in quality rather the most recent cohorts of foreign born economists appear to be more productive than their native counterparts jel j61 i introduction this article is the first systematic analysis of the attributes and abilities of foreign born u s economists since a descriptive study of the brain drain by grubel and scott 1967 it also provides some of the first formal evidence for the largely theoretical proposition in earlier work by bhagwati and rodriquez 1975 that the united states draws the best skilled workers from abroad however recent immigration literature has not focused on the brain drain but has generated considerable debate concerning whether the 1965 immigration and nationality act has reduced the skill quality of u s immigrants in particular descriptive evidence in borjas 1987 and greenwood 1983 respectively indicates that the 1965 law shifted the composition of u s immigrants toward non european nations and increased the number of low skilled migrants to the united states our article extends this work by examining whether there has been a post 1965 change in the source country mix of ph d economists and whether such chan ges impact the productivity of the foreign born in comparison to their native counterparts most empirical studies of immigrant productivity have focused on earnings early cross sectional studies of immigrant earnings including chiswick 1978a concluded that the age earnings profile of immigrants is steeper than that of comparable native born workers and though initially lower crosses the native profile 10 to 15 years after immigration these results are consistent with the widely held belief that the immigration process self selects the highly motivated and industrious from their respective source countries thus immigrants although they initially enter the united states with relatively low levels of human capital eventually become more productive than their native counterparts more recent work by borjas 1985 1987 has contested these conclusions arguing that it is not possible to separately identify assimilation and cohort effects using a single cross sectional data set in particular the positive correlation between earnings and years since migration in cross sectional data may be due to immigrant assimilation or a cohort effect that arises from the declining skill quality of more recent immigrant groups borjas combines multiple cross sectional data sets to separately identify assimilation and cohort effects and finds evidence indicating that earlier cohorts of immigrants do relatively better than both natives and more recent immigrant cohorts suggesting a decline in immigrant quality although chiswick 1986 challenges the contention of declining immigrant quality and funkhouser and trejo 1995 find evidence that immigrant quality may have increased during the 1980s borjas 1995 contends that the empirical evidence consistently shows that immigrant quality has declined for most of the postwar period however the decline in immigrant quality has not necessarily been found within specific groups of immigrants in particular greenwood and mcdowell 1986 find that the change in skill quality is related to the shift in the source country composition of immigrants away from european nations toward those from asia and latin american after the 1965 immigration act thus explanations for the relatively poor performance of recent immigrants including those in lalonde and topel 1991 1992 and borjas 1992 focus on the post 1965 changes in the incentives to migrate to the united states that have increased the number of low skilled non european immigrants

general equilibrium pricing of options on the market portfolio with discontinuous returns when the price process for a long lived asset is of a mixed jump diffusion type pricing of options on that asset by arbitrage is not possible if trading is allowed only in the underlaying asset and a risk less bond using a general equilibrium framework we derive and analyze option prices when the underlying asset is the market portfolio with discontinuous returns the premium for the risk of jumps and the diffusion risks forms a significant part of the prices of the options in this economy an attempted replication of call and put options by the black scholes type of trading strategies may require substantial infusion of funds when jumps occur we study the cost and risk implications of such dynamic hedging plans article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

on and off the hot seat an analysis of entry into and out of university administration the authors investigate economists decisions to enter and exit department chair positions in research intensive economics departments of elite universities during the postwar era 1948 1989 they use the american economic association survey of members as well as phone surveys to determine which and at what point in their careers faculty assume administrative positions the theoretical model predicts and empirical results confirm that a faster rate of knowledge depreciation in an economist s field of study reduces the entry and exit rates for the chair position moreover among those who have exited the position of chair longer terms of past chair service and faster knowledge depreciation accelerate the timing of movements into upper level administration the findings suggest that administrators are to some extent made and not born and that the growing specialization and technical nature of many professions could affect who chooses administrative careers and at what point in their careers they choose

beyond arbitrage good deal asset price bounds in incomplete markets one often wants to value a risky payoff by reference to prices of other assets rather than by exploiting full fledged economic models however this approach breaks down if one cannot find a perfect replicating portfolio we impose weak economic restriction to derive usefully tight bounds on asset prices in this situation the bounds assume that investors would want to buy assets with high sharpe ratios good deals as well as pure arbitrage opportunities we show how to calculate the price bounds in one period multiperiod and continuous time contexts we show that the multiperiod problem can be solved recursively as a sequence of one period problems we calculate bounds in option pricing examples including infrequent trading and an option written on a nontraded event and we use the bounds to explore the economic significance of option pricing predictions we find that much variation in s p 500 index option prices over time and across strike prices fits within the bounds

gender and job performance evidence from wall street this study concerns the relationship between gender and job performance among brokerage firm equity analysts women s representation in analyst positions dropped from 16 percent in 1995 to 14 percent in 2005 the study found significant gender based differences in performance on various dimensions for example women cover roughly 9 stocks on average as compared with 10 for men and women s earnings estimates tend to be less accurate than men s estimates but the study also found that women are significantly more likely than men to be designated as all stars which indicates that they outperform men in other aspects of job performance

robust pricing of the american put option a note on richardson extrapolation and the early exercise premium this paper presents a detailed analysis of the numerical implementation of the american put option decomposition into an equivalent european option plus an early exercise premium kim 1990 jacka 1991 carr et al 1992 it subsequently introduces a new algorithm based upon this decomposition and richardson extrapolation this new algorithm is based upon a the derivation of the correct order for the error term when applying richardson extrapolation which is used to control the error of the extrapolated prices b an innovative adjustment of kim s 1990 discrete time early exercise premium so that these premiums monotonically converge and therefore it is appropriate to use them in extrapolation and c the optimal exercise frontier can be quickly computed through newton s method permitting the efficient implementation of the decomposition formula in practice numerical experiments show that this new algorithm is accurate efficient easy to implement and competitive in comparison with other methods finally it can also be applied to other american exotic securities

financial development and economic growth views and agenda this critique argues that the preponderance of theoretical reasoning and empirical evidence suggests a positive first order relationship between financial development and economic growth the body of work would push even most skeptics toward the belief that the development of financial markets and institutions is a critical and inextricable part of the growth process and away from the view that the financial system is an inconsequential sideshow responding passively to economic growth many gaps remain however and the paper highlights areas in acute need of additional research

gender wage inequality and export led growth in south korea this article investigates the relationship between gender wage inequality and export led growth in south korea the persistent gender wage gap in korea s manufacturing sector is found to be linked to women s segregation in the country s major export industries where real wage growth has lagged productivity growth despite favorable market conditions that might drive up women s wages relative to those of men the interaction of state and firm level hiring training and promotion practices that structure women s and men s employment opportunities differently appear to have resulted in a relatively weaker fall back position for women in labour markets econometric results are consistent with the hypothesis that women s weaker fall back position limits their ability to bargain for wage increases commensurate with productivity growth further evidence is presented which links gender wage inequality to the growth of korean exports

hedging derivative securities and incomplete markets an e arbitrage approach given a european derivative security with an arbitrary payoff function and a corresponding set of underlying securities on which the derivative security is based we solve the optimal replication problem find a self financing dynamic portfolio strategy involving only the underlying securities that most closely approximates the payoff function at maturity by applying stochastic dynamic programming to the minimization of a mean squared error loss function under markov state dynamics we derive recursive expressions for the optimal replication strategy that are readily implemented in practice the approximation error or e of the optimal replication strategy is also given recursively and may be used to quantify the degree of market incompleteness to investigate the practical significance of these e arbitrage strategies we consider several numerical examples including path dependent options and options on assets with stochastic volatility and jumps