price dispersion and seller heterogeneity in retail food markets price dispersion i e a homogeneous product being sold at different prices by different sellers is among the most replicated findings in empirical economics the paper assesses the extent and determinants of spatial price dispersion for 14 perfectly homogeneous food products in more than 400 retailers in a market characterized by the persistence of a large number of relatively small traditional food stores alongside large supermarkets the extent of observed price dispersion is quite high when prices in an urban area where the spatial concentration of sellers is higher are compared with those in smaller towns and rural areas differences in search costs and the potentially higher degree of competition do not yield lower prices other counteracting factors including differences in seller costs and consumer incomes make prices on average higher in the urban area for 11 of the 14 products considered for many but not all the products supermarkets proved to be less expensive than traditional retailers although average savings from food shopping at supermarkets were extremely low finally the results of the study provide evidence that retailers have different pricing strategies and these differences also emerge for supermarkets belonging to the same chain the results presented in the paper suggest that a variety of factors play a role in explaining price dispersion in addition to differences in seller costs the contemporaneous heterogeneity of retailers in terms of services provided and consumers in terms of search costs and preferences makes the emergence of monopolistic competition possible as well as allowing small traditional food retailers to remain in business

the retail price of inequality abstract this paper studies the relation between a city s income distribution and its retail price level using panel data we find that an increase in the presence of lower middle income households relative to poor or upper income households is associated with lower prices our findings suggest that greater income inequality raises the prices that poor households face thus making it harder for them to invest in human capital

the math gender gap the role of culture this paper investigates the effect of gender related culture on the math gender gap by analysing math test scores of second generation immigrants who are all exposed to a common set of host country laws and institutions we find that immigrant girls whose parents come from more gender equal countries perform better relative to similar boys than immigrant girls whose parents come from less gender equal countries suggesting an important role of cultural beliefs on the role of women in society on the math gender gap the transmission of cultural beliefs accounts for at least two thirds of the overall contribution of gender related factors

buying less but shopping more the use of nonmarket labor during a crisis households allocating time between market and non market uses should respond to income variations by adjusting the time devoted to shopping search and other home production activities in this paper we exploit high frequency household expenditure data to examine the use of changes in shopping intensity as a method of mitigating the effects of the 2002 argentine economic crisis although the total quantity and real value of goods purchased fell during the crisis consumers are found to be doing more shopping search this increase in shopping is shown to enable households to seek out lower prices and locate substitutes allowing a given level of expenditure to buy more goods the magnitude and prevalence of these effects suggest that this non market use of labor can be an important coping strategy for households during a recession

evolution of gender differences in post secondary human capital investments college majors although women in the united states now complete more college degrees than men the distribution of college majors among college graduates remains unequal with women about two thirds as likely as men to major in business or science we develop and estimate a dynamic overlapping generations model of human capital investments and labor supply we allow for specific college major choices instead of aggregating these choices to the education level results show that changes in skill prices higher schooling costs and gender specific changes in home value were each important to the long term trends abstract from author

do the urban poor face higher food prices evidence from vietnam abstract whether there is a poverty penalty in terms of food prices is unsettled in the literature after more than four decades of study unit values from household surveys suggest that prices vary with income while outlet surveys typically find food prices varying with store type but not with neighborhood income most outlet surveys are from rich countries with just one spatially limited study from a developing country in this paper we use especially collected food price data from metropolitan areas of vietnam to test whether the urban poor face higher food prices food prices in low income neighborhoods are 1 lower on average than in other neighborhoods unit values give a different answer to the question of whether the poor face higher prices and are not suited to answer such a question

the british low wage sector and the employment prospects of the unemployed abstractare low wages a way for the unemployed to switch to higher paying jobs using data from the british household panel survey the labour market dynamics of unemployed low paid and higher paid employed men are analysed moreover the respective un employment duration and occupational skill level are accounted for results show that in general low wages significantly reduce the risk of future unemployment and increase the chances of ascending the salary ladder especially in the case of long term unemployment 360 days furthermore the occupational skill level has a substantial influence on the upward mobility of low paid jobs individuals working in the initial period in a low paid and higher skilled occupation have on average an 11 percentage points higher probability of entering higher pay compared to when working in a low paid and low skilled occupation

on gender gaps and self fulfilling expectations alternative implications of paid for training i introduction the recent literature on gender differences in the labor market has focused mainly on two issues the first one deals with the mechanisms e g adverse selection that can amplify initial differences in preferences or productivity across genders leading to sizeable gender gaps in wages labor force participation or working hours these models help us understand to what extent changes in gender gaps have been due to changes in fundamentals including differences in the pattern of endogenous accumulation of human capital by men and women 1 the second one is related to the channels explaining persistence in gender gaps even when exogenous differences across the sexes are of little importance or even absent 2 these studies tend to rely upon the existence of incentive problems in the labor market e g moral hazard leading to self fulfilling prophecies about differences in gender roles without assuming any initial comparative advantages our paper falls into this second strand of the literature by considering an alternative mechanism based on statistical discrimination by firms in the provision of paid for training to male and female workers this yields multiplicity of equilibria in gender gaps even in the absence of moral hazard 3 the basic idea in models of gender gaps relying upon self fulfilling prophecies is that employers beliefs about women s lower attachment to the labor market lead to wage differentials in favor of men hence since women expect to face a lower expected opportunity cost they end up devoting more time to housework validating in this way firms beliefs for example albanesi and olivetti 2009 propose a model where firms are subject to incentive compatible constraints due to their imperfect monitoring of workers effort a moral hazard problem and of hours of housework an adverse selection problem as a result different types of labor contracts are offered to men and women in a similar vein lommerud and vagstad 2007 deal with a model where firms allocate workers to fast and slow track jobs the former requiring a fixed investment cost if women have traditionally exerted primary major responsibility at home and wages are non contractible they will predominantly follow a mommy track in equilibrium while incentive problems often used to derive additional predictions on the structure of wages to be confronted with the data provide a useful modeling device they could be somewhat restrictive for instance concerning the difficulty of perfectly monitoring effort pay gaps should be negligible for routine tasks performed by less skilled employees for whom effort and output should be easily observable yet even after removing differences in observable characteristics and in the overall wage dispersion there is evidence about substantial gender gaps in hourly wages in these categories see e g blau and kahn 2000 bassanini and saint martin 2008 de la rica et al 2008 our paper contributes to this literature by proposing a novel mechanism which does not rely on incentive problems we consider a two period model in which firms initially offer paid for training to workers taking as given the division of housework between spouses in the second period spouses decide on how to split the certain and uncertain parts of housework where the latter is captured by the realization of a shock affecting household tasks during this period e g unexpected need of housework or events that require parental leave etc both decisions interact because the housework decision determines whether a spouse works or quits after receiving training and the firm chooses the amount of training without observing the household s housework allocation statistical discrimination arises in this setup as a result of firms prior beliefs about which spouse is more likely to quit the job under the key assumptions that wages are predetermined with respect to housework shocks and that the household does not re optimize after the shock is revealed asymmetric beliefs will induce differences in the provision of training across spouses

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

subject of degree and the gender wage differential evidence from the uk and germany abstract we show that controlling for subject of degree explains a significant part of the male female gender wage differential amongst graduates using data from the labour force surveys of the united kingdom and germany we find similar results in these two countries subject of degree explains about 2 4 higher wages of male over female graduates after controlling for age industry region part time and public sector employment this is a significant part between 8 and 20 of the overall male female gender wage gap and an even larger amount of the part explained by factors entered into wage equations at around 24 30 of the explained component

the gender gap in early career wage growth in the uk the gender pay gap on entry to the labour market is approximately zero but ten years after labour market entry there is a gender wage gap of almost 25 log points this article explores the reason for this gender gap in early career wage growth considering three main hypotheses human capital job shopping and psychological theories human capital factors can explain about 11 log points job shopping about 1 5 log points and the psychological theories up to 4 5 log points depending on the specification but a substantial unexplained gap remains women who have continuous full time employment have had no children and express no desire to have them earn about 8 log points less than equivalent men after 10 years in the labour market

gender achievement and subject choice in english education in common with other oecd countries there is a gender gap in educational achievement in england favouring girls this carries through to tertiary education on the other hand boys are far more likely to engage in stem in post 16 vocational education and at university the underachievement of boys overall but over representation in stem presents significant challenges for policy this paper documents changes in the gender gap over the last 20 years in england and discusses findings in the light of international evidence it concludes that education policies in academic and in vocational spheres can be designed to reduce gender inequalities that exist in both

hiring and leasing with nonlinear prices this paper examines the problem of a monopolist setting an optimal nonlinear pricing schedule in the face of consumers of unknown type who arrive randomly over time and self select a choice of hire period the major determinant of pricing policy is the customer arrival distribution with the overall level of price higher than in the atemporal yield management nonuniform pricing solution by a margin which increases with the average frequency with which potential customers arrive by contrast the solution is generally fairly insensitive to variations in the time rate of discount although there is a tendency for the rate of price discount to increase with increases in the time discount rate

the gender wage gap and the role of reservation wages new evidence for unemployed workers this paper examines the importance of differences in reservation wages for the gender wage gap based on two waves of rich survey data for a sample of newly unemployed individuals in germany we perform a decomposition analysis including measures for reservation wages detailed information on education socio demographics labor market history as well as personality traits in order to address the potential endogeneity of reservation wages we exploit a generated instrumental variable strategy that relies on heteroscedasticity of the error terms our findings indicate that the gender wage gap becomes small and statistically insignificant once we control for reservation wages moreover we perform a subgroup analysis that provides valuable insights about the importance of potentially unobserved characteristics that affect reservation wages and realized wages simultaneously reasons for differences in reservation wages could arise from productivity differences the fact that women anticipate discrimination and different unobserved traits or preferences

the changing economic advantage from private schools private schooling is an important feature of education systems across the world despite its relatively small size the british private school sector has a long history and plays a prominent role in society we provide evidence showing that private schools have been successful in transforming their ability to generate the academic outputs that are most in demand in the modern economy the private state school wage differential has risen significantly over time and a significant factor has been faster rising educational attainment for privately educated individuals

early gender gaps among university graduates abstract we use data from six cohorts of university graduates in germany to assess the extent of gender gaps in college and labor market performance twelve to eighteen months after graduation men and women enter college in roughly equal numbers but more women than men complete their degrees women enter college with slightly better high school grades but women leave university with slightly lower marks immediately following university completion male and female full timers work a very similar number of hours per week but men earn more than women across the pay distribution with an unadjusted gender gap in full time monthly earnings of about 20 log points on average including a large set of controls reduces the gap to 5 10 log points the single most important proximate factor that explains the gap is field of study at university

quantity discounts managerial issues and research opportunities marketing managers frequently administer pricing policies involving substantial quantity discounts however our understanding of the precise role of these discounts and their design is quite limited this paper reviews and integrates the economics and marketing literature and presents a detailed analysis of the policies of four firms in order to i specify the variety of motivations for quantity discounts ii provide guidelines to managers in designing quantity discount schedules and iii set out the most fruitful directions for future research

dynamic pricing of multiple home delivery options abstract online grocers accept delivery bookings and have to deliver groceries to consumers residences grocery stores operate on very thin margins therefore a critical question that an online grocery store needs to address is the cost of home delivery operations in this paper we develop a markov decision process based pricing model that recognizes the need to balance utilization of delivery capacity by the grocer and the need to have the goods delivered at the most convenient time for the customer the model dynamically adjusts delivery prices as customers arrive and make choices the optimal prices have the following properties first the optimal prices are such that the online grocer gains the same expected payoff in the remaining booking horizon regardless of the delivery option independently chosen by a consumer second with unit order sizes delivery prices can increase due to dynamic substitution effects as there is less time left in the booking horizon

do the poor pay more for food evidence from the united kingdom does food cost more for low income households this paper compares two well known approaches to answering this question i find that quantity discounts for a broad range of foods are statistically significant and economically important however quantity discounting does not lead to the poor paying more for food i find that the poor pay less than average for the food they purchase this is explained by the poor spending a greater share of their income on foods where quantity discounting occurs copyright 2010 oxford university press

orchestrating impartiality the impact of blind auditions on female musicians a change in the audition procedures of symphony orchestras adoption of blind auditions with a screen to conceal the candidate s identity from the jury provides a test for sex biased hiring using data from actual auditions in an individual fixed effects framework we find that the screen increases the probability a woman will be advanced and hired although some of our estimates have large standard errors and there is one persistent effect in the opposite direction the weight of the evidence suggests that the blind audition procedure fostered impartiality in hiring and increased the proportion women in symphony orchestras

operations research in inventory management a review and critique the objectives of inventory management including the relevant related costs are examined in this paper a brief review of standard problems that have been effectively solved is presented however we point out that a serious gap exists between theory and practice in many organizations suggestions are made for bridging this gap finally a list is provided of a number of research problems whose implementable solution would have a major beneficial impact on the practice of inventory management

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

do the poor pay more retail food prices in northeast brazil i malnutrition poverty and food prices research on food consumption and nutritional status in brazil based primarily on the large nationwide estudo nacional da despesa familiar endef survey of 1974 75 appears to have established that protein calorie malnutrition is widespread in the country and that it is due principally to poverty rather than cultural or educational factors 1 dietary knowledge and habits do help account for malnutrition especially among very young children but many families incomes are simply too low to purchase an adequate diet even if nutrients were obtained at minimal cost and were adequately distributed among family members both malnutrition and poverty are concentrated in northeastern brazil and are found among urban squatter populations as well as in rural areas

prices and unit values in poverty measurement and tax reform analysis researchers often use unit values household expenditures on a commodity divided by the quantity purchased as proxies for market prices when calculating poverty lines and estimating consumer demand equations such proxies are often needed because community price surveys in developing economies are either absent or suffer quality problems however using unit values may result in biases due to measurement error and quality effects in a household survey experiment information on prices was obtained in three ways from unit values from a market price survey and from the opinions of householders who were shown pictures of items and asked to report the local price the three sets of price data are used to calculate poverty lines estimate price elasticities and analyze marginal tax reforms there are substantial biases when unit values are used as a proxy for market price even when sophisticated correction methods are applied performance was better for the price opinions of household members the results highlight the importance of price collection methods and the need to consider the wider costs of having potentially unreliable community level price data

optimal pricing for information goods with piracy and saturation effect we analyze the pricing decision of a firm selling a product for which there is a significant and continuous saturation effect over time and that can be pirated assuming that the firm uses a skimming strategy we solve three profit maximization models given demand that is linearly decreasing in price few prices can be used over the life of the product the effects of both piracy and saturation are combined in the first model in the second model the firm can invest in technology or copyright enforcement to reduce piracy the third model describes the case in which piracy leads to increased awareness of the product and increased demand numerical sensitivity analysis and examples are used to illustrate the results the results indicate that under strong piracy and saturation effects a skimming strategy is suboptimal

a taxonomy and research overview of perishable asset revenue management yield management overbooking and pricing this paper proposes the term perishable asset revenue management to denote the field that combines the areas of yield management overbooking and pricing for perishable assets after summarizing the characteristics common to problems in this field the paper discusses the objectives and constraints faced by decision makers then it offers a comprehensive taxonomy with 14 different elements and reviews the research that has been done related to each element finally it suggests some important areas of future research that can help bridge the gap between theory and application

the food system transformation in developing countries a disaggregate demand analysis for fruits and vegetables in vietnam abstract food systems in developing countries are currently undergoing a rapid transformation towards high value products and modern supply chains while supply side aspects of this transformation have been analyzed previously issues of consumer demand have received much less attention this article analyses demand patterns for fresh fruits and vegetables in vietnam using household survey data and a demand systems approach demand for products from modern supply chains particularly supermarkets and non traditional imports is highly income elastic and the income effect is stronger than the impact of prices and supermarket penetration this highlights the importance of considering demand side aspects when projecting future trends our results imply a continued restructuring of the food sector in the further process of economic development

changes in college skills and the rise in the college wage premium the college wage premium for new labor market entrants rose sharply during the 1980s we ask how much of this change arose from changes in the skill level of the typical college graduate we find that skills attained prior to college as measured by standardized test scores and high school grades had no effect on the change in the college wage premium for men in contrast the returns to math ability rose considerably for women failing to account for math skills thus substantially overstates the growth in the female college wage premium skills acquired in college as reflected in the distribution of students across majors had important effects on the relative wages of men the trend away from low skill subjects such as education and toward high skill subjects such as engineering accounts for one fourth of the rise in the male college wage premium

airline seat allocation with multiple nested fare classes this paper addresses the problem of determining optimal booking policies for multiple fare classes that share the same seating pool on one leg of an airline flight when seats are booked in a nested fashion and when lower fare classes book before higher ones we show that a fixed limit booking policy that maximizes expected revenue can be characterized by a simple set of conditions on the subdifferential of the expected revenue function these conditions are appropriate for either the discrete or continuous demand cases these conditions are further simplified to a set of conditions that relate the probability distributions of demand for the various fare classes to their respective fares the latter conditions are guaranteed to have a solution when the joint probability distribution of demand is continuous characterization of the problem as a series of monotone optimal stopping problems proves optimality of the fixed limit policy over all admissible policies a comparison is made of the optimal solutions

on the decomposition of wage differentials the often used method for decomposing wage differentials into human capital and discrimination components is reformulated so that both t he disadvantage or cost discrimination it imposes on a black or minority wage earner and the advantage or benefit it bestows on a white or majority wage earner can be estimated copyright 1988 by mit press

price unit value and quality demanded abstract given the paucity of quality price data it is common to rely on unit value average expenditure per unit as a proxy for price but this is an imperfect proxy if households respond to price increases by substituting to lower quality goods this paper draws on survey data that contain both unit value and price to estimate the severity of quality substitution in indonesia finding that it is prevalent the paper next calculates price elasticities that correct for quality substitution evaluating and ultimately rejecting a commonly used method for calculating price elasticities using only unit value data finally it demonstrates that quality substitution can result in biased price elasticities even when price is perfectly observed

prices and living standards evidence for rwanda abstract we review the explanations of the statistical relationship between spatial price indices and real living standards then using data from several seasons in rural rwanda we show that these variables are negatively associated hinting at price discrimination against the poor in that case policies permanently improving of market functioning may simultaneously improve efficiency and equity moreover under a hypothesis of weak association of nominal living standards and price indices we derive simplified formulae for social welfare indicators these formulae depend only on a small number of sample statistics obtainable from separate publications for prices and living standards

swimming upstream trends in the gender wage differential in the 1980s using michigan panel study of income dynamics data for 1979 and 1988 we analyze how a falling gender wage gap occurred despite changes in wage structure unfavorable to low wage workers the decrease is traced to gender specific factors which more than counterbalanced changes in measured and unmeasured prices working against women supply shifts net of demand were unfavorable for women generally and hurt high skilled more than middle and low skilled women by analyzing wages we find support for the notion of a gender twist in supply and demand having its largest negative effect on high skilled women

austerity and gender inequalities in europe in times of crisis the post 2008 recession and the countercyclical responses by european governments that followed triggered an extensive wave of fiscal adjustments although underpinned by widespread consensus the implementation of such measures has also been severely criticised while their effect on output and employment has been extensively investigated their impact on wage inequality has received less attention in this paper we focus on the consequences of fiscal consolidation measures for gender inequality after describing the literature based conceptual framework of our analysis we provide empirical evidence of the effect of fiscal consolidation on i the adjusted gender wage gap and ii the patterns of gender horizontal segregation the analysis covers eu 28 countries in the years 2010 13 results show that austerity measures both tax based and expenditure based impacted significantly on various aspects of gender wage inequality putting at risk the relatively little progress achieved in europe so far