The optimal shipment size and truck size choice - The allocation of trucks across hauls
The optimal shipment size and truck size choice - The allocation of trucks across hauls
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DOI：
10.1016/j.tra.2013.11.008
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发表时间：
2014-01-01
影响因子：
6.4
通讯作者：
de Jong, Gerard
中科院分区：
文献类型：
--
作者：
Abate, Megersa;de Jong, Gerard
人们越来越有兴趣了解公司如何在不同的运输中分配卡车，以及这种分配在不同的经济环境下是如何变化的。本研究探讨路线/运输、承运人和车辆特性的变化如何影响最佳车辆尺寸选择和相关的运输尺寸选择。我们证明了这两个选择是由同一个优化问题导出的。货运规模可能是连续的，但货运的决策者必须从有限数量的备选车辆中进行选择。因此，我们使用离散-连续计量经济模型，其中货运规模作为连续变量建模，车辆尺寸/类型选择作为离散变量。结果表明，当面临更高的需求和更长的旅行时，企业更有可能大量使用更重的车辆和船舶，这表明企业正在实现规模经济和距离经济。本研究亦探讨车辆营运成本对车辆选择过程的影响及其政策启示。(C) 2013 Elsevier Ltd.版权所有。
There has been a growing interest in understanding how firms allocate their trucks across hauls, and how this allocation changes under various economic environments. This study investigates how variations in route/haul, carrier and vehicle characteristics affect the optimal vehicle size choice and the associated choice of shipment size. We show that the two choices are derived from the same optimization problem. There can be a continuum of shipment sizes, but decision-makers in freight transport have to choose from a limited number of vehicle alternatives. Therefore, we use a discrete-continuous econometric model where shipment size is modeled as a continuous variable, and vehicle size/type choice as a discrete variable. The results indicate that when faced with higher demand, and during longer trips firms are more likely to use heavier vehicles and ship in larger quantities which suggest that firms are realizing economies of scale and economies of distance. The study also discusses the effect of vehicle operating cost on the vehicle selection process and its policy implications. (C) 2013 Elsevier Ltd. All rights reserved.