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首页> 外文期刊>Transportation Research Part B: Methodological >Linking discrete choice to continuous demand within the framework of a computable general equilibrium model
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Linking discrete choice to continuous demand within the framework of a computable general equilibrium model

机译：在可计算的一般均衡模型的框架内将离散选择与连续需求联系起来

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Discrete choice (DC) models are commonly used as basic building blocks in 'bottom-up' models which seek to describe consumer and producer behaviour at a disaggregate level, in contrast to continuous demand (CD) models which are used to describe behaviour at a more aggregate level. At a disaggregate level, choice behaviour is defined in terms of commodities differentiated by qualities or attributes. In contrast, aggregate demand behaviour is defined in terms of broadly defined and generically different commodities. In a DC model, the main focus of analysis is not the total quantity of demand, but rather the relative shares or substitution between the choice alternatives, in contrast to a continuous demand model where the focus is on the aggregate substitution between groups of commodities as well as on the income effects. Seen in this way, there is scope for complementary usage of DC and CD models within the framework of a CGE model where DC models are used to describe the preferences for a narrowly defined set of commodities belonging to a particular sector of an economy, and CD models are used to describe the interactions between these sectors. In this paper, we describe how DC and CD models can be used in such an integrated fashion in a spatial computable general equilibrium model to inquire into the wider economic impacts of a transport investment project in the Sydney Metropolitan Area.
机译：离散选择（DC）模型通常用作“自下而上”模型的基本构建模块，而“自下而上”模型试图以分解的层次描述消费者和生产者的行为，而连续需求（CD）模型则用于描述消费者的行为。总体水平更高。在分解级别上，选择行为是根据商品的质量或属性来定义的。相反，总需求行为是根据广义定义的商品和通常不同的商品定义的。在DC模型中，分析的主要重点不是需求总量，而是选择备选方案之间的相对份额或替代，而连续需求模型则侧重于商品组之间的总替代，即以及对收入的影响。这样看来，在CGE模型的框架内DC和CD模型可以互补使用，其中DC模型用于描述对属于特定经济部门的狭义定义的商品集和CD的偏好。模型用于描述这些部门之间的相互作用。在本文中，我们描述了如何在空间可计算的一般均衡模型中以集成方式使用DC和CD模型，以研究悉尼大都会区运输投资项目的更广泛的经济影响。

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