The Supply-Driven Input-Output Model: A Reinterpretation and Extension
The Supply-Driven Input-Output Model: A Reinterpretation and Extension
复制标题
供给驱动的投入产出模型：重新解释与延伸
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
JiYoung Park
中科院分区：
文献类型：
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作者：
JiYoung Park
大多数先前的输入输出应用程序都专注于构建各种需求驱动的 IO 模型，因为它们在区域科学中被广泛接受。在戈什提出供应驱动的IO模型之后，关于其合理性的争论随之而来。 Dietzenbacher (1997) 将其解释为价格模型的建议解决了大部分问题，该模型类似于 Leontief 的价格模型； Leontief 模型估计相对价格变化，而 Ghosh 模型可以估计绝对价格变化。然而，在静态市场均衡中，生产者不会改变基于外生事件发生后不久的历史销售的当前技术关系。这解决了戈什的供应驱动模型是用货币表达的数量来表示的事实，因此适用于在经济异常停止的静态市场均衡情况下使用供应方IO。为了对供应驱动的IO模型提出新的解释，沿着“价格与价格-数量”和“增加-减少”轴引入了经济形势的四象限空间。此外，即使在不维持正常市场均衡的情况下，戈什的案例也可以转化为价格型供给驱动模型，而不是直接使用供给侧数量模型，并在估计经济影响方面发挥作用。为了解决这一转换过程，需求的外生价格弹性与供应驱动模型相结合，调整数量对价格影响的反应。这一逻辑将成为利用供给方模型所需的理论背景的基础，因此它通过阐明供给模型的适用性来强调线性模型的力量和有用性。这种方法还可以简化非线性 IO 模型的开发。
Most previous input-output applications have focused on constructing various demand-driven IO models because of their widely accepted usefulness in regional science. After Ghosh’s suggestion of the supply-driven IO model, a debate over its plausibility ensued. Much of this was resolved with Dietzenbacher’s (1997) suggestion of its interpretation as a price model, one that similar to Leontief’s price model; the Leontief model estimates relative price changes whereas the Ghosh model can estimate absolute price changes. However, in static market equilibrium, producers will not change the current technical relationships that are based on historical sales during the immediate period after an exogenous event. This addresses the fact that Ghosh’s supply-driven model is in terms of monetarily expressed quantities and hence applicable when using the supply-side IO in the circumstance of static market equilibrium with abnormal economic cessations. To suggest a new interpretation for the supply-driven IO model, a four-quadrant space of economic situations is introduced, along ‘price vs. price-quantity’ and ‘increase-decrease’ axes. Furthermore, even in the case that normal market equilibrium is not maintained, instead of the direct use of supply-side quantity models, Ghosh’s case can be translated to a price-type supply-driven model, and play a role in estimating economic impacts. To address this switching process, exogenous price elasticities of demand are combined with the supply-driven model, adjusting quantity responses to price impacts. This logic will underlie the theoretical background necessary to utilize the supply-side model, and hence it highlights the power and the usefulness of linear models by clarifying the applicability of the supply model. This approach can also simplify the development of non-linear IO models.