An economic-statistical design of double sampling control chart

The double sampling (DS) chart can reduce the sample size when monitoring the process mean. In this study, Duncan's cost model was modified by adding the statistical constraints to develop the design model of DS chart for the optimization of design parameters—sample size, control limit coefficient, warning limit coefficient and sampling interval. A numerical example was provided to illustrate the use of this model. A sensitivity analysis of the effects of model parameters and statistical constraints on the optimal design of DS chart was also performed.     

Coordinating a one-warehouse N-retailer distribution system under retailer-reporting

We consider a distribution system consisting of a System Administrator (SA) and N retailers managed under dynamic allocation and static routing policies. We study the system under two scenarios: (a) the up-to-date information scenario, under which the SA has access to the inventory levels at the retailers in real time and makes the replenishment and allocation decisions based on these information, aiming to minimize total supply chain cost; (b) the retailer-reporting scenario, under which the SA makes the replenishment and allocation decisions based on the information reported by the retailers. Under the retailer-reporting scenario, the retailers compete against each other by reporting their inventory levels falsely to get the desired allocations, which minimize the retailers’ expected cost. For N=2 retailers, we show that, in general, reporting truthfully does not minimize either retailer's expected cost/cycle over their respective replenishment/allocation cycles, and that the sum of the retailers' expected cost/cycle is strictly greater than in the up-to-date information scenario. We then show that by including a particular transfer-payment between the two retailers, truth-telling is a Bayesian equilibrium, and that the same system expected cost/period as in up-to-date information scenario can be achieved.     

Market Share and Price Setting Behavior for Private Labels and National Brands

In this paper, we focus on the nature of demand and competitive response in the market for private label and national branded grocery products. Specifically,we employ less restrictive functional forms than usedin prior research. Specifically, we incorporateLA/AIDS demands and the corresponding price reactionequations to estimate consumer price sensitivities andsupply side price strategies for national brand andprivate label products. Oligopolistic priceinterdependence is explored further by specifyingbrand share, brand Herfindahl, and a measure of thestructure of the local retail markets in the supplyside relations to evaluate explicitly the impact ofmarket structure.In our empirical analysis, we estimate a system of market share and price equations simultaneously inorder to examine (i) the determinants of the demandresponse to pricing and promotion decisions and (ii)the determinants of private label and national brandpricing behavior. Using data for 143 food productcategories and 59 geographic markets, we develop amodel that captures the variation in privatelabel-national brand share and pricing acrosscategories and markets. Key findings include: (i)demand response to price and promotion is decidedlyasymmetric, (ii) price followship between privatelabels and national brands is positive, but notstrong, and (iii) markets characterized by highernational brand market share and higher supermarketconcentration tend to have higher prices forboth national brands and private labels.     

Industry Update: Airlines

Recent developments in the airline industry are notable in three respects. A rising tide of concentration, which is accelerating and expanding through a proliferation of alliances among major carriers at home and abroad; a recurring resort to predatory pricing by the majors which continues to subvert competition by low-cost independents; and an intensification of the tacitly collusive, noncompetitive pricing behavior expected to emerge in such a highly concentrated structural milieu.     

Long-term covered interest parity and the international swap market

This paper examines the pricing of long-term forward exchange contracts. It is established empirically that the traditional covered interest arbitrage pricing relationship is often violated, and that the behaviour of long- and short-term forward exchange rates is substantively different. It is argued that activity in the international currency and interest rate swap markets provides a potential explanation for the observed mispricing. In particular, fixed-to-fixed currency swaps provide another form of arbitrage which can affect long-term forward exchange pricing.The author is currently a visiting Senior Fellow at the National University of Singapore. The research assistance of Barry Halwas contributed to the paper.     

How do Participants in Research Joint Ventures Diversify?

This paper investigates the incentives to participate in research joint ventures from the perspective of overall business diversification behavior. It presents evidence that: (a) RJVs tend to put together industrial activities differently than single firms; and, (b) the diversification decisions of RJV participants are triggered partly differently than the analogous decisions of firms that have not participated in the examined large set of RJVs. The results indicate that RJVs facilitate experimentation. They also indicate that the policy debate on inter-firm cooperation in R & D must consider the likely differences in strategic behavior between frequent RJV participants and other firms.     

Problem-solving in teaching/learning packages for Technology

In the project Technology in Secondary Education: Problem-solving in Teaching/learning Packages, two experiments regarding a construction problem and an explanation problem were conducted, in which two variants of a teching/learning package (strongly structuredvs. weakly structured) were compared. Only with the strongly structured instructional variant of the package for the explanation problem did the pupils come to a quick solution of the problem. In both experiments, the factors that influenced the problem-solving processes of the pupils were investigated. The results are of importance for curriculum developers and the authors of teaching/learning packages for Technology but further research into the factors influencing the problem solving process of pupils is necessary.     

Promoting Energy Efficiency in an Emerging Market: Insights and Intervention Strategies

Promoting energy efficiency and conservation is an urgent imperative in responding to the need to reduce carbon dioxide emissions, particularly in emerging markets. This article provides insights into factors that may enhance or impede the purchase of energy-efficient household appliances in Vietnam. It also suggests intervention strategies to enhance the motivators and mitigate the barriers associated with energy-efficient appliance purchases. Data were collected from shoppers in popular electronics and appliance stores. The findings reveal that consumer purchasing behaviors are motivated by long-term savings, environmental protection, social influence, green self-identity and innovative technologies. Major barriers include lack of information, low level of credibility of energy rating labels, high prices, time consumption and limited product range.

This article is of interest to policy-makers, social-environmental organizations, manufacturers and retailers in the development of more effective strategies for promoting energy efficiency and conservation. It extends current knowledge about environmentally responsible behavior in emerging markets such as Vietnam.     

The bakers of Washington cartel: Twenty-five years later

Craig M. Newmark challenges the findings of a 1965 Federal Trade Commission decision and Economic Report that a price fixing cartel increased bread prices in the state of Washington from the mid-1950s to 1964. Newmark believes prices were higher during the cartel's existence because retailers in the west had higher margins and that bakers in the west had higher wages and higher normal profits than elsewhere in the country. Newmark ignores evidence that the cartel had set the higher retailer margins in Washington and that the labor costs and profits of Washington bakers were not higher than elsewhere. The Washington bakers had inflated distribution costs and excess capacity prior to the cartel's breakup. This result is commonplace when a cartel stimulates costly nonprice competition, so that the higher prices of the cartel members end up primarily in higher unit cost. Finally, Newmark claims that the reason prices fell in 1965 was the entry of a significant size price cutter, not the demise of the cartel. What Newmark characterized as a principal entrant was actually a tiny, two-man operation, with less than a 1.0 percent market share. The record shows that this entrant did not trigger the precipitous price decline occuring when the cartel was destroyed.