OBJECTIVES To examine the efficacy of alternative approaches for shifting consumers toward zero calorie beverages. We examined the effect of price discounts and novel presentations of calorie information on sales of beverages. METHODS This prospective interrupted time-series quasi-experiment included three sites in Philadelphia, PA, Evanston, IL, and Detroit, MI. Each site received five inter...

Most empirical and theoretical econometric studies of dynamic discrete choice models assume the discount factor to be known. We show the knowledge of the discount factor is not necessary to identify parts, or even all, of the payoff function. We show the discount factor can be generically identified jointly with the payoff parameters. On the other hand it is known the payoff function cannot be ...

Abstract An influential result in the literature on charitable giving is that matching subsidies dominate rebate raising funds. We investigate whether this extends to “unit donation” schemes, a popular alternative form of soliciting donations. There, donors’ choices are over number units good fund at given unit price, rather than amount money give. Comparing matches and rebates as well simple d...

The essence of the simplest buy-at-bulk network design problem is buying network capacity "whole-sale" to guarantee connectivity from all network nodes to a certain central network switch. Capacity is sold with "volume discount": the more capacity is bought, the cheaper is the price per unit of bandwidth. We provide O(log 2 n) randomized approximation algorithm for the problem. This solves the ...

We estimate discount rates of 555 subjects using a laboratory task and …nd that these individual discount rates predict inter-individual variation in …eld behaviors (e.g., exercise, BMI, smoking). The correlation between the discount rate and each …eld behavior is small: none exceeds 0.28 and many are near 0. However, the discount rate has at least as much predictive power as any variable in ou...

In this paper, we have proposed an improved genetic algorithm (GA) to solve constrained knapsack problem in fuzzy environment. Some of the objects among all the objects are associated with a discount. If at least a predetermined quantity of the object(s) (those are associated with a discount) is selected, then an amount (in $) is considered as discount. The aim of the model is to maximize the t...

0377-2217/$ see front matter 2008 Elsevier B.V. A doi:10.1016/j.ejor.2008.09.037 * Tel.: +90 312 2901702. E-mail address: [email protected]. In this study, we analyze the replenishment decisions under a general replenishment cost structure that includes stepwise freight costs and all-units quantity discounts. We first formulate a general model that accounts for a larger class of problems an...