Static and dynamic time-space strategic models and algorithms for multilevel rail-car fleet management
Article Abstract:
A study examined the design of dynamic time-space and calibrated static strategic planning models. It also investigated solution algorithms for the multilevel rail-car fleet management problem facing the Assn. of American Railroad's RELOAD. An alternative dynamic model which involved time-space network representation was proposed and was found to appropriately define the problem and to offer information about storage and retrieval of empty cars. A solution to this model was designed in the form of a decomposition heuristic patterned after solution for subproblems for overlapping time segments. The heuristic satisfactorily recovered an optimal solution for all the test problems. A procedure for quantifying the static model based on this enhanced time-space representation was revealed to obtain near-optimal total fleet size requirements. This facilitates the use of simple, calibrated static model.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1997
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Empirical analysis of closed-loop duopoly advertising strategies
Article Abstract:
A comparison of open-loop equilibria and closed-loop equilibria advertising strategies is made. These are two different types of Nash equilibrium solutions wherein the former refers to advertising as a function of time, given market share initial values. In contrast, closed-loop equilibria refer to advertising as a function of both time and current system state. Advertising competition as represented by a Lancaster duopoly game is modeled using two simultaneous nonlinear systems, one constrained and one unconstrained version. The application to Coca-Cola and Pepsi-Cola involve statistical testing of either closed- or open-loop as the preferred advertising strategy. The general specification is applied to the case of Miller and Anheuser-Busch. The results indicate that closed-loop strategies are preferred and that the monotonicity in market share of advertising levels is ambiguous.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1992
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An empirical test of value-based planning models and implications
Article Abstract:
A firm's value determines the extent of its entrepreneurial activities. An examination of scope, nature, and consequences of strategic management decisions reveals that corporate value is seldom considered in this area. The corporate strategy should accommodate corporate valuation, and reflect programs for increasing this value. The value creation-destruction process for companies is described from the standpoint of strategic planning at the corporate level. A model is developed for analyzing corporate value and assessing appropriate planning strategies based upon the valuation. The model is based upon 4,000 observations at 40 industries over a ten-year period.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1984
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