Improving Subnational Input-Output Analyses Using Regional Trade Data: A Case-Study and Comparison
Improving Subnational Input-Output Analyses Using Regional Trade Data: A Case-Study and Comparison
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DOI：
10.1021/acs.est.0c04728
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发表时间：
2020-10-06
影响因子：
11.4
通讯作者：
Zhu, Bing
中科院分区：
文献类型：
--
作者：
Jiang, Meng;Liu, Lin;Zhu, Bing
环境扩展投入产出分析（EE-IO）被广泛用于评估环境绩效（即，足迹）在国家一级。许多研究将其分析扩展到国家以下一级，以指导区域政策。一个有希望的方法是嵌入按国家分列的投入产出表，例如，嵌套一个省级表，成为一个全球多区域投入产出表。然而，一种广泛使用的环境评估方法通常使用相同的比例（比例假设）将国家一级的贸易结构分解到省一级。这意味着，国际贸易的地方空间异质性没有得到充分体现。通过对中国省域物质足迹（MF）的两种计算方法--基于比例假设和基于实际海关的计算方法--在相同的框架下，对比例假设下的定量差异进行了评估。statistics.in通过对中国30个省份的23种资源总量的MF计算，我们的结果表明，对于中国这样的物质流大国，按比例假设估算次国家层面的国际贸易可能会导致分类和总量层面的物质流存在显著差异。一个重要的后续问题是，这些差异是否也与其他足迹相关。
Environmentally extended input-output analysis (EE-IO) is widely used for evaluating environmental performance (i.e., footprint) at a national level. Many studies have extended their analyses to the subnational level to guide regional policies. One promising method is to embed nationally disaggregated input-output tables, e.g., nesting a provincial level table, into a global multiregional input-output table. However, a widely used approach to environmental assessment generally disaggregates the trade structure at the national level to the provincial level using the same proportions (proportionality assumption). This means that the subnational spatial heterogeneities on international trade are not fully captured. By calculating the Chinese provincial material footprint (MF) based on two approaches-the proportionality assumption and the actual customs statistics.in the same framework, we evaluate the quantitative differences when the proportionality assumption is addressed. By computing MF for 23 aggregated resources across 30 Chinese provinces, our results show for countries with large material flows like China, estimating subnational-level international trade by proportionality assumption may lead to significant differences in material flows at both the disaggregated and aggregated levels. An important follow-up question is whether these differences are also relevant for other footprints.