Operations Research articles from January 2007

Operations Research archives from January 2007

Paradigm change in Operations Research: thirty years of debate.(OR CHRONICLE)
January 1, 2007... From the 1970s onwards, the OR community in Britain engaged in ongoing debate on the future of the discipline, the product of an emerging "crisis of confidence" engendered in part by the end of the "golden age of western economic growth" and...

An OR missionary's visits to the criminal justice system.(operations research)
January 1, 2007... One of the historic roles of operations research (OR) people in the problem domains they enter is that of missionary, bringing their OR techniques of quantitative modeling, system perspective, and planning to the fields where those approaches...

Determining the acceptance of cadaveric livers using an implicit model of the waiting list.
January 1, 2007... The only available therapy for patients with end-stage liver disease is organ transplantation. In the United States, patients with end-stage liver disease are placed on a waiting list and offered livers based on location and waiting time, as...

Competition in service industries.
January 1, 2007... We analyze a general market for an industry of competing service facilities. Firms differentiate themselves by their price levels and the waiting time their customers experience, as well as different attributes not determined directly through...

Reliable due-date setting in a capacitated MTO system with two customer classes.(make-to-order)
January 1, 2007... We study a finite-horizon discrete-time model of due-date setting (equivalently, reserving capacity) in a make-to-order setting, where demands arrive from two different classes of customers. Demands in each period are stochastic. The two...

Price guarantees in dynamic pricing and revenue management.
January 1, 2007... We present a new model for revenue management of product sales that incorporates both dynamic pricing and a price guarantee. The guarantee provides customers with compensation if, prior to a fixed future date, the price of the product drops...

Robust mean-covariance solutions for stochastic optimization.
January 1, 2007... We provide a method for deriving robust solutions to certain stochastic optimization problems, based on mean-covariance information about the distributions underlying the uncertain vector of returns. We prove that for a general class of...

Nash-Cournot equilibria in electric power markets with piecewise linear demand functions and joint constraints.
January 1, 2007... Most previous Nash-Cournot models of competition among electricity generators have assumed smooth demand (price) functions, facilitating computation and proofs of existence and uniqueness. However, nonsmooth demand functions are an important...

Equilibrium forward contracts on nonstorable commodities in the presence of market power.
January 1, 2007... Bilateral supply contracts are widely used despite the presence of spot markets. In this paper, we provide a potential explanation for this prevalence of supply contracts even when spot markets are liquid and without delivery lag. Specifically,...

Variable disaggregation in network flow problems with piecewise linear costs.
January 1, 2007... We study mixed-integer programming formulations, based upon variable disaggregation, for generic multicommodity network flow problems with nonconvex piecewise linear costs, a problem class that arises frequently in many application domains in...

Maximin Latin hypercube designs in two dimensions.
January 1, 2007... The problem of finding a maximin Latin hypercube design in two dimensions can be described as positioning n nonattacking rooks on an n x n chessboard such that the minimal distance between pairs of rooks is maximized. Maximin Latin hypercube...

Satiation in discounted utility.(consumption)
January 1, 2007... In this paper, we propose a model of intertemporal choice that explicitly incorporates satiation due to previous consumption in the evaluation of the utility of current consumption. In the discounted utility (DU) model, the utility of...

Lexicographically minimum and maximum load linear programming problems.
January 1, 2007... In this paper, we introduce the lexicographically minimum load linear programming problem, and we provide a polynomial approach followed by the proof of correctness. This problem has applications in numerous areas where it is desirable to...