Wavelet Analysis of the Bombay Stock Exchange Index

The fluctuations in the rate of returns of the Bombay stock exchange are analyzed through wavelet transform. The fluctuations, in various time scales, naturally separated by the wavelets, are subjected to statistical analysis. The localization and multiresolution properties of the wavelets enable one to identify collective behaviour in the stock market and the extent of their influence at various time scales. The Gaussian nature of the rate of returns at certain scales and the periodic nature of the same, at other scales, are clearly brought out by this analysis. The utility of this approach for modeling purpose is also elucidated.

     

The different faces of coupon elasticity

Coupons account for over two-thirds of all consumer promotional efforts initiated by the manufacturers of consumer goods. In this study, the impact of coupons on brand sales is investigated and how that impact decays over the life of the coupon is demonstrated. Specifically, we present an econometric model that can capture coupon effects in terms of equivalent price reduction, account for coupon effects over time, allow inference of coupon effects when retailers decide to double or triple the coupon value, and provide both self-coupon and cross-coupon elasticities at different levels of aggregation. A widely used sales response model is adapted, and an analytical model is proposed to estimate both the self-coupon and cross-coupon (face value) elasticities of sales at the store level. From the store-level elasticity estimates for a given week, the authors analytically derive the coupon elasticities for the chain level by aggregating across stores, and over the life of the coupon by aggregating over time. The proposed sales response model is estimated with the data obtained from three markets for various product categories, and the coupon elasticities are computed. The proposed framework allows one to demonstrate the hypothetical equivalence of a shelf-price reduction for a given coupon face value in each week. Also, the effect of doubling the face value of a coupon results in more than a proportionate increase in elasticity. The authors find that both self and cross-coupon elasticities are much smaller in magnitude than the average self and cross-price elasticity measures reported in the literature.     

Planning food services for a campus setting

Providing appropriate food services in a campus setting is increasingly important due to more demanding customers and because clients have less time to go off-campus when they need to eat. Using a university campus as an example, this research looks at customer satisfaction with existing food services and explores various methods for determining where to locate new facilities. This campus currently has great needs for additional food services, and it is shown clearly where additional food services are required. Also, the methods used are compared in terms of their effectiveness in finding the solution.     

The Competitive Characteristics of U.S Manufacturers in the Machine Tool Industry

This paper examines the competitive characteristics of U.S. manufacturers in the machine tool (MT) industry. After several decades of decline, this industry has recently shown signs of a modest but sustained recovery. Empirical evidence from a national survey of 104 MT producers suggests that the revival of this sector has been driven by a combination of factors, including renewed export involvement, improved customer support, and better product design. Although most MT companies are small-to-medium-sized enterprises (SMEs), the survey data show that very small SMEs are poorly represented in the recovery thrust of the industry as a whole. Our principal conclusion is that the MT industry has been following an export-led path toward stabilization, but that certain types of small producers are unlikely to thrive for very long. The most serious problems facing small producers include shrinking local markets, import competition, shortages of skilled labor, and cyclical demand.     

On efficiency of the ratio estimator

Summary The exact mean square error for the ratio estimator of a finite population total based on simple random sampling without replacement is shown to have an expected value less than that of the variance of the ratio estimator based on Midzuno’s scheme, under a usual super-population model.     

Using a customer-Level marketing strategy to enhance firm performance: A review of theoretical and empirical evidence

It is becoming increasingly apparent from the literature that marketers need to consider customer-level information when they generate a marketing strategy for the firm. In this article, the authors develop a customer-focused framework that uses a marketing strategy with an overall objective of maximized financial performance. This strategy is driven by seven customer-level marketing tactics and shows how actual customer data can be used to generate an actionable marketing strategy leading to optimal levels of profitability, customer equity, and shareholder value. In addition, the authors discuss a successful implementation of this strategy for several business-to-business and business-to-consumer firms and offer insights as to how to customize an implementation strategy for any firm, along with presenting potential challenges a firm may encounter during the implementation process. Several suggestions for future research are offered to explore and harness this newly available evidence. V. Kumar (VK) (vk@business.uconn.edu) is the ING Chair Professor of Marketing and the executive director of the ING Center for Financial Services at the University of Connecticut. He spends his time by transferring his knowledge (however little it may be) to his two daughters about customer lifetime value, diffusion models, forecasting sales and market share, retailing, and marketing strategy. J. Andrew Petersen (apetersen@business.uconn.edu) is a doctoral candidate in marketing at the University of Connecticut. His research interests include customer lifetime value, word-of-mouth effects, and customer-level marketing strategy. His research has been published inMarketing Research Magazine and theJournal of the Academy of Marketing Science.     

Salespeople’s use of upward influence tactics (UITs) in coping with role stress

Researchers’ attentions have recently focused on how salespeople cope with role stress. This study focuses on salespersons’ use of six upward influence tactics (UITs) with the immediate sales manager, and how salespeople use UITs to lessen the impact of two role stressors (perceived role conflict and role ambiguity) associated with the sales job. The study also evaluates the potential moderating role of UITs on relationships between role stress and manager satisfaction and propensity to leave. Analysis of data gathered from a heterogeneous sample revealed differences in use of UITs between salespeople classified as either high or low in role stress. Salespeople who perceive high role conflict employ assertiveness and upward appeal UITs more frequently. Salespeople who perceive high role ambiguity use exchange and coalition-building UITs more frequently. Results also suggest that salespersons’ use of assertiveness and ingratiation UITs exacerbate relationships between perceived role ambiguity and two outcomes: satisfaction with supervisor and propensity to leave. Implications of the study findings for sales managers are reviewed, as are implications for further research. His research interests are in the areas of personal selling and sales management. His work has appeared inJournal of Education for Business, Journal of Marketing Theory and Practice, and various national and international conference proceedings. Jeffrey K. Sager, Ph. D., conducts research in the areas of salesperson turnover and job stress. His work has appeared in theJournal of the Academy of Marketing Science, Journal of Personal Selling and Sales Management, andJournal of Business Research. His research interests are in the fields of strategic management and organizational behavior. His research has been published in theAcademy of Management Journal, Journal of Applied Psychology, and several other journals.     

Ex-post full surplus extraction,straightforwardly

Consider an estimate of the common value of an auctioned asset that is symmetric in the bidders’ types. Such an estimate can be represented solely in terms of the order statistics of those types. This representation forms the basis for a pricing rule yielding truthful bidding as an equilibrium, whether bidders’ types are affiliated or independent. We highlight the link between the estimator and full surplus extraction, providing a necessary and sufficient condition for ex-post full surplus extraction, including the possibility of independent types. The results offer sharp insights into the strengths and limits of simple auctions by identifying the source of informational rents in such environments. Harstad acknowledges hospitable accommodation by the Fuqua School of Business, Duke University, and the Olin School of Business, Washington University in St. Louis, during parts of this research. We are grateful for comments and suggestions from Richard McLean and Jeroen Swinkels.     

The impact of taxes on female labour supply

There is little agreement in economics on the factors influencing labour supply and hence on the impact of taxes. Within the marginal model, real wages and incomes are directing people's labour market behaviour independent of time and space, whereas the human resources approach takes account of the social environment and past behaviour. Even if strong assumptions are made, the neoclassical theory cannot predict the outcome of a wage increase. The labour supply response depends on the relative strengths of the substitution and the income effect. Since nonparticipation in the labour market is explained by a reservation wage being higher than the market wage, this is the only situation in which neoclassical theory would predict a rise in labour force participation with a wage increase. This case occured in a ‘natural experiment’ in Sweden. The Swedish tax system changed in 1971 from joint to separate taxation of spouses resulting in a substantial increase in the net wage of married women. This article investigates the impact of the change in the Swedish tax system on female labour force participation, concluding that it cannot explain the substantial rise in the participation rates of Swedish women. This is a significant result, questioning standard neoclassical theory and supporting the more institutional views of human labour market behaviour. That is that time and space as well as the social environment are important when analyzing labour supply. This will have consequences for international comparisons. Only factors which explain developments within one country might be relevant for explaining international differences, e.g. in labour force participation.