optimal dynamic pricing of inventories with stochastic demand over finite horizons in many industries managers face the problem of selling a given stock of items by a deadline we investigate the problem of dynamically pricing such inventories when demand is price sensitive and stochastic and the firm s objective is to maximize expected revenues examples that fit this framework include retailers selling fashion and seasonal goods and the travel and leisure industry which markets space such as seats on airline flights cabins on vacation cruises and rooms in hotels that become worthless if not sold by a specific time we formulate this problem using intensity control and obtain structural monotonicity results for the optimal intensity resp price as a function of the stock level and the length of the horizon for a particular exponential family of demand functions we find the optimal pricing policy in closed form for general demand functions we find an upper bound on the expected revenue based on analyzing the deterministic version of the problem and use this bound to prove that simple fixed price policies are asymptotically optimal as the volume of expected sales tends to infinity finally we extend our results to the case where demand is compound poisson only a finite number of prices is allowed the demand rate is time varying holding costs are incurred and cash flows are discounted the initial stock is a decision variable and reordering overbooking and random cancellations are allowed

innovation and diffusion in small firms theory and evidence the article provides an inventory of the strengths and weaknesses of small firms in a dynamic context to do this it considers verbal accounts of the processes of innovation and diffusion as well as quantitative studies testing cause effect relations it consider both economic and noneconomic factors concerning issues of motivation perception and knowledge first an overall summary is given of the characteristics of small business compared with large business as a basis for an assessment of strengths and weaknesses perhaps the most important characteristic of small business is its diversity and the article gives the conditions and sources of it other core characteristics are small scale personality and independence of the small firm from these derived characteristics strengths and weaknesses and core strategies can be inferred from the perspective of the firm strengths and weaknesses are subsequently analysed for the successive stages of innovation invention development tooling production introduction to practice market strengths and weaknesses in diffusion are analysed for the successive stages in the adoption process as proposed by rogers reference is made to theory and to empirical studies from the literature and from research by the present author

who is against immigration a cross country investigation of individual attitudes toward immigrants abstract this paper empirically analyzes economic and noneconomic determinants of individual attitudes toward immigrants within and across countries the two survey data sets used covering a wide range of developed and developing countries make it possible to test for interactive effects between individual characteristics and country level attributes in particular theory predicts that the correlation between pro immigration attitudes and individual skill should be related to the skill composition of natives relative to immigrants in the destination country skilled individuals should favor immigration in countries where natives are more skilled than immigrants and oppose it otherwise results based on direct and indirect measures of the relative skill composition are consistent with these predictions noneconomic variables also are correlated with immigration attitudes but they don t alter significantly the labor market results

getting into the energy efficiency scene does corporate social responsibility matter for energy efficiency in smes a growing body of literature argues that improving energy efficiency is an essential step that firms must take to mitigate climate change issues it is assumed that corporate social responsibility

determining factors for the adoption of e business the case of smes in korea this study investigates the determining factors of the successful adoption of e business by small and medium enterprises smes in korea using survey data after the major determining factors were identified from the innovation adoption literature and were extracted by applying the principal component analysis to the survey data and by adding the country specific characteristics of korea we conducted empirical analyses to determine the critical success factors for the adoption of e business by korean firms the empirical results which are based on t tests of the differences between adopters and non adopters the linear probability model and the logit model all suggest that the important determinants of the successful adoption of e business by smes in korea are the ceo s knowledge of information technology it e business relative advantages and benefits from implementing e business governmental support globalization strategy and the north korean factor business size the cost of e business adoptio

the influence of entrepreneur s personal characteristics on mses growth through innovation abstractresearch in the separate areas of innovation and growth has considerably intensified in recent years however little scholarly attention has been paid to the entrepreneurs personal characteristics that might explain the growth of micro and small enterprises mses through innovation this study examines the key entrepreneurs personal characteristics affecting micro and small enterprises mses upgrading defined here as substantial growth through innovation six major determining types of entrepreneurs characteristics were identified from the innovation and the growth literature education work experience gender motivations nationality and age the empirical results which are based on t tests of the differences between upgraders and non upgraders the linear probability model and the logit model all suggest that work experience and motivations are cornerstones in the likelihood that an mse will upgrade the policy implications of this study on promoting mses upgrading are also discussed

developments in implementable retailing research abstract a favorable image and a convenient location are essential to attract customers into a store possibly with the benefit of retailer advertising once inside the customer s buying decision will be greatly influenced by the products on display their prices and other promotions the ultimate profitability for the retailer will also depend on the efficiency of the operations advances in these areas are reviewed through twenty four publications in the last five years with references back to six earlier papers

a meta analysis of the international gender wage gap abstract since the early 1970s a number of authors have calculated gender wage differentials between women and men of equal productivity this meta study provides a new quantitative review of this vast amount of empirical literature on gender wage differentials as it concerns not only differences in methodology data and time periods but also different countries we place particular emphasis on a proper consideration of the quality of the underlying study which is done by a weighting with quality indicators the results show that data restrictions i e the limitation of the analysis to new entrants never marrieds or one narrow occupation only have the biggest impact on the resulting gender wage gap moreover we are able to show what effect a misspecification of the underlying wage equation like the frequent use of potential experience has on the calculated gender wage gap over time raw wage differentials worldwide have fallen substantially however most of this decrease is due to better labor market endowments of females

wage discrimination occupational segregation and visible minorities in canada the earnings gap between each of whites asians and blacks is decomposed into the effects on earnings of productivity related characteristics wage discrimination and occupational segregation unlike previous canadian studies this paper analyses the relative economic position of both immigrant and native born visible minorities and explicitly incorporates the effect of discrimination in occupational attainment on the earnings gap the results indicate that policies aimed at increasing the ethnic representation across occupational categories would be effective only for black men anti discrimination legislation aimed at decreasing the earnings gap between visible minority and white women should have a dual focus they should aim at reducing the inter occupational wage discrimination they should provide training programs to extend the career ladders confronting ethnic minority women

sh a r p shelf allocation for retailers profit shelf space is the retailer s scarcest resource space management tools are thus badly needed for that purpose commercial computer packages and optimal allocation models have been developed building on the work of corstjens and doyle we elaborate a general theoretical shelf space allocation model which focuses on the demand interdependencies prevailing across and within product groups rules of thumb are compared to the derived optimal allocation the sh a r p model is introduced as a simplified yet realistic variant and validated against data collected in a dutch supermarket chain subsequently the feasibility of its implementation has been experimented in various belgian chains case studies demonstrate the profit potential of sh a r p

a two stage sales forecasting procedure using discounted least squares the authors develop a two stage forecasting methodology for estimating the sales responses to marketing and environmental variables when it is likely that their impacts will change unpredictably over time the methodology is based on an integrated least squares procedure that uses regression analysis in stage 1 to estimate the coefficients of the controllable and environmental variables in combination with a stage 2 discounted least squares smoothing procedure that updates key parameters in response to changing market conditions the effectiveness of the methodology is demonstrated by applying it to weekly sales data from a major retail chain

the gap between male and female pay in the spanish tourism industry abstract this paper analyzes wage differentials between male and female workers in the spanish tourism industry using a large administratively matched employer employee data set obtained from a representative sample of companies this allows us to control for unobserved firm specific factors likely to affect the magnitude of the gender wage gap our findings indicate that male workers earn on average 6 7 higher monthly wages than their socially comparable female counterparts in particular the type of contract held the qualifications required for the job and the specific sub sector of employment are very important variables in explaining this gender wage difference we also find that only around 12 of the mean wage difference in the tourism industry cannot be explained by differences in observable characteristics which is well below the average for the rest of the industries in spain 87 our interpretation is that minimum wage legislation provides a particularly effective protection to women in the tourism industry which is characterized by a large number of low wage earners

the endogeneity between language and earnings international analyses this study is concerned with the determinants of dominant language fluency its effects on earnings and its endogeneity with earnings among immigrants dominant language fluency is hypothesized to

what characterizes a fast growing firm this paper seeks to empirically identify factors that influence the probability of being a fast growing firm in eastern and western germany descriptive analyses have shown that most firms experience only small positive or negative employment growth or stagnate over time the job generation mechanism rests with a handful of firms that increase their employment significantly over time the empirical analysis shows that the probability of being a fast growing firm depends on different factors when separating eastern and western germany as well as using different definitions of fast growing firms moreover the analysis shows that technology intensive manufacturing branches and knowledge based business related services do not generate the majority of fast growing firms

wage determination of registered nurses in proprietary and nonprofit nursing homes this study explores why registered nurses employed in nonprofit nursing homes earn higher wages than those employed in proprietary facilities previous studies have explained this finding in a property rights context where higher wages were posited to result from the weaker incentives for cost minimization accompanying nonprofit status this paper tests an alternative explanation of sectoral wage differences which is predicated on the reason for the coexistence offor profit and nonprofit firms in a given industry informational constraints concerning the quality of care are posited to cause the long term health care market to fail to provide care at the upper levels of a quality of care continuum nonprofits are viewed as a response to this form of market failure acting to fulfill customers demand for higher quality and higher cost long term care with attendant demand for higher quality nurses than in for profit homes both the observed sectoral pattern in selectivity and wage decompositions based on selectivity corrected wage regressions call into question the property right explanation yet are consistent with an asymmetric information explanation

customer racial discrimination in the market for memorabilia the case of baseball because consumer discrimination can reduce productivity it is often impossible to tell whether differential productivity is the effect of discrimination or of differential ability detailed data for the sports labor market make it possible to separate consumer discrimination from ability we use a unique approach to determine whether the entertainment value of baseball players is related to their race we examine whether race directly affects the value of a player in the market for baseball cards in contrast to studies that use salaries there is no room for owner or coworker discrimination our evidence supports the hypothesis of consumer discrimination

clearance pricing and inventory policies for retail chains clearance pricing and end of season inventory management are challenging and important problems in retailing sales rates depend upon price seasonal effects and the remaining assortment of items available to customers there is little time to react to observed sales and pricing errors result in either loss of potential revenue or excess inventory to be liquidated this paper develops optimal clearance prices and inventory management policies that take into account the impact of reduced assortment and seasonal changes on sales rates versions of these policies have been tested and implemented at three major retail chains and these applications are summarized and discussed

asymmetric labor market reforms effects on wage growth and conversion probability of fixed term contracts the authors investigate the impact of a change in employment protection laws in portugal that increased the maximum legal duration of fixed term contracts they find that this reform led to a reduction in the probability that a worker on a fixed term contract would be converted to a permanent contract in addition those workers who had their contracts converted experienced a significantly higher hourly wage growth at the time of conversion and faced a lower reduction in wage growth during the years in which the changed legislation was in force consequently the implementation of this law led to a 27 increase in the wage growth differential between the two contracts the findings are based on an endogenous regime switching model using rich administrative linked employer employee data

robust optimal policies of production and inventory with uncertain returns and demand abstract we consider an inventory and production planning problem with uncertain demand and returns in which the product return process is integrated into the manufacturing process over a finite planning horizon we first propose an inventory control model for the return and remanufacturing processes with consideration of the uncertainty of the demand and returns then a robust optimization approach is applied to deal with the uncertainty of the problem through formulating a robust linear programming model moreover properties on the robust optimization model are studied and an equivalent robust optimization model based on duality theory is obtained which allows the solutions to be derived more efficiently finally we provide a set of numerical examples to verify the effectiveness of the approach and analyze the effects of the key parameters on the solutions

combined pricing and inventory control under uncertainty this paper addresses the simultaneous determination of pricing and inventory replenishment strategies in the face of demand uncertainty more specifically we analyze the following single item periodic review model demands in consecutive periods are independent but their distributions depend on the item s price in accordance with general stochastic demand functions the price charged in any given period can be specified dynamically as a function of the state of the system a replenishment order may be placed at the beginning of some or all of the periods stockouts are fully backlogged we address both finite and infinite horizon models with the objective of maximizing total expected discounted profit or its time average value assuming that prices can either be adjusted arbitrarily upward or downward or that they can only be decreased we characterize the structure of an optimal combined pricing and inventory strategy for all of the above types of models we also develop an efficient value iteration method to compute these optimal strategies finally we report on an extensive numerical study that characterizes various qualitative properties of the optimal strategies and corresponding optimal profit values

a robust optimization approach to inventory theory we propose a general methodology based on robust optimization to address the problem of optimally controlling a supply chain subject to stochastic demand in discrete time this problem has been studied in the past using dynamic programming which suffers from dimensionality problems and assumes full knowledge of the demand distribution the proposed approach takes into account the uncertainty of the demand in the supply chain without assuming a specific distribution while remaining highly tractable and providing insight into the corresponding optimal policy it also allows adjustment of the level of robustness of the solution to trade off performance and protection against uncertainty an attractive feature of the proposed approach is its numerical tractability especially when compared to multidimensional dynamic programming problems in complex supply chains as the robust problem is of the same difficulty as the nominal problem that is a linear programming problem when there are no fixed costs and a mixed integer programming problem when fixed costs are present furthermore we show that the optimal policy obtained in the robust approach is identical to the optimal policy obtained in the nominal case for a modified and explicitly computable demand sequence in this way we show that the structure of the optimal robust policy is of the same base stock character as the optimal stochastic policy for a wide range of inventory problems in single installations series systems and general supply chains preliminary computational results are very promising

risk averse retail pricing with robust demand forecasting abstract good demand estimates are the key to effective pricing decision making however they are subject to a high degree of uncertainty due to various factors that are unpredictable or difficult to model thus making pricing decisions risky this research provides a simple proposal for a robust optimization methodology that incorporates both demand uncertainty and the decision maker s degree of risk aversion uncertainty is explicitly considered for two coefficients of a linear demand function price expressions are derived and a criterion is proposed for defining the degree of risk aversion the resulting model is also applied to an exponential demand case to better reflect a more realistic retail setting

you can t take it with you immigrant assimilation and the portability of human capital the national origin of an individual s human capital is a crucial determinant of its value education and labor market experience acquired abroad are significantly less valued than human capital obtained domestically this difference can fully explain the earnings disadvantage of immigrants relative to comparable natives in israel variation in the return to foreign schooling across origin countries may reflect differences in its quality and compatibility with the host labor market the return to foreign experience is generally insignificant acquiring additional education following immigration appears to confer a compound benefit by raising the return to education acquired abroad

periodic pricing of seasonal products in retailing this paper studies intertemporal pricing policies when selling seasonal products in retail stores we first present a continuous time model where a seller faces a stochastic arrival of customers with different valuations of the product for this model we characterize the optimal pricing policies as functions of time and inventory we use this model as a benchmark against which we compare more realistic models that consider periodic pricing reviews we show that the structure of the optimal pricing policies in this case is consistent with the procedures observed in practice retail stores successively discount the product during the season and promote a liquidation sale at the end of the planning horizon we also show that the loss experienced when implementing periodic pricing reviews instead of continuous policies is small when the appropriate number of reviews is chosen several interesting economic insights emerge from our analysis for example uncertainty in the demand for new products leads to higher prices larger discounts and more unsold inventory finally we study the effect of announced discount policies on prices and profits we show that stores that have adopted this type of strategy usually set prices such that with high probability the merchandise is sold during the first periods and the largest discounts rarely take place

introduction to special issue of small business economics on female entrepreneurship in developed and developing economies research into entrepreneurship has for many years been interested in the differences in rate of participation and performance by female entrepreneurs the motivation for considering female entrepreneurship in both developing and developed countries arises from our increasing understanding of the significance of the role of women in creating running and growing businesses as a fundamental driver for economic growth this special issue examines the reasons for differences in gender participation across levels of development using empirical studies

labor market discrimination against hispanic and black men h ispanic american men have lower average wage rates than white non hispanics in 1975 the average white non hispanic male wage earner in the united states earned 5 97 an hour mexican men earned 4 31 72 as much as white non hispanics puerto rican men earned 4 52 76 as much and cuban men earned 5 33 89 as much as white non hispanics by way of comparison black men s average wages in 1975 were 4 65 78 of the white male wage several possible reasons for the hispanics lower wages come to mind among them are age and education geographic location immigration language difficulties and discrimination for example as shown in table 1 mexicans and puerto ricans are younger on average than the white non hispanic population and earnings tend to rise with age hispanics have lower average levels of education than white non hispanics and wages are positively associated with education many mexican americans live in the southwest where prices are relatively low moreover hispanics are more likely to be recent immigrants and to lack fluency in english than white non hispanics and so to be at a disadvantage in the labor market in addition there is a widespread belief that hispanics suffer from employment discrimination and cannot obtain the wages that their human capital would command if they were non hispanic whites how much of the wage differentials described above are due to each of these factors and to other inter group differences in wage related characteristics in particular how much impact does labor market discrimination have on the average hispanic man s wage and how does this compare with discrimination against blacks this paper provides answers to these questions a few other efforts have been made to analyze the relative earnings of hispanic and white nonhispanic men using 1960 and 1970 census data fogel 1966 poston and alvirez 1973 poston alvirez and tienda 1976 long 1977 and gwartney and long 1978 we use more recent data from the 1976 survey of income and education this data set enables us to measure wage rates more accurately and to specify the wage function more completely than does the census unlike previous analysts in estimating the wage function we take account of possible selectivity bias due to the distinction between average wage offers and average observed wages thus we hope to obtain a more accurate and up to date measure of labor market discrimination against hispanic men section ii explains the method used to separate the minority white non hispanic wage differential into the portions due to differences in average characteristics and the portion due to differences in unobserved factors and discrimination taking into account the possibility of selectivity bias in the observed wage sample section iii describes the data used in the study and the specification of the wage equation the breakdown of the observed wage differentials into components due to differences in participation in the wage and salary sector local price levels average characteristics and discrimination are presented in section iv section v summarizes our findings and discusses their implications for efforts to improve the economic situation of hispanics in the united states

the influence of product range in the space allocation procedure abstract considering product range as a part of the marketing mix is demonstrated as being of importance for a chain of medium sized supermarkets the concept of range elasticity is introduced and a space allocation procedure based on range elasticity models is provided the procedure considers the problem of group space allocation in addition to the more common problem of allocating a fixed amount of space to a product group

foreignness and exit over the life cycle of firms received wisdom indicates that owing to a liability of foreignness foreign firms exit with greater likelihood than do comparable domestic firms and that the difference attenuates as firms age and overcome the liability we posit that foreign firms are also intrinsically more volatile and footloose than domestic ones and that this leads to an increasing divergence between the exit rates of foreign and domestic firms empirically we find that the difference between exit rates of foreign firms and domestic firms increases with age as exit of foreign firms increases with age while that of purely domestic firms decreases exit rates of domestic based multinationals do not change significantly with age they are between those of foreign and purely domestic firms but are closer to the latter this suggests that the footlooseness observed for foreign firms is due to foreignness more than to multinationality

electronic price testing scheme for fashion retailing with information updating abstract pricing is a crucial decision for electronic fashion retailers motivated by various observed industrial practices in electronic retailing we study in this paper the optimal internet pricing schemes which employ price testing with bayesian information updating following the bernoulli process this paper contributes to the literature and advancement of knowledge in a number of ways i we propose an analytical model to study the internet pricing problem with price testing and bayesian information updating for fashion retailers ii we derive the closed form expressions of the expected value of sampling information evsi and the expected value of perfect information evpi under the price testing scheme iii we conduct the pre posterior analysis and construct the optimal sampling plan with three different rules iv we develop the optimal posterior pricing policies with respect to the mean risk and value at risk var objectives numerical analyses which include the studies on evpi and the efficient frontiers are presented to generate more insights

incorporating the causes of occupational differences in studies of racial wage differentials this study provides a basic framework for incorporating the causes of occupational differences into analyses of racial wage differentials separating the influences of personal characteristics occupational choice and hiring discrimination on occupational attainment provides measures of the contributions of each to the racial pay gap the paper also considers the potential for bias in the wage equation estimates arising from self selection into occupations there are two generalfindings first correcting for self selection increases the importance of occupational distribution in explaining racial wage differentials second a proper accounting of the causes of these occupational differences yields discrimination measures that are higher than those that arise when occupational dummy variables are included in the wage equations and all the difference in occupational distribution is treated as nondiscriminatory

dynamic pricing in the presence of inventory considerations research overview current practices and future directions the benefits of dynamic pricing methods have long been known in industries such as airlines hotels and electric utilities where the capacity is fixed in the short term and perishable in recent years there has been an increasing adoption of dynamic pricing policies in retail and other industries where the sellers have the ability to store inventory three factors contributed to this phenomenon 1 the increased availability of demand data 2 the ease of changing prices due to new technologies and 3 the availability of decision support tools for analyzing demand data and for dynamic pricing this paper constitutes a review of the literature and current practices in dynamic pricing given its applicability in most markets and its increasing adoption in practice our focus is on dynamic intertemporal pricing in the presence of inventory considerations