Key sector analyses have a long and rich history. However, almost all the previous analyses were conducted only within an input–output (IO) framework for a national economy. The present study (1) performs the analysis for a subnational (or regional) economy suffering severe leakages of industries’ revenues due to a large amount of imports and a large fraction of factor income earned by non-residents, and (2) extends the previous IO-based analyses to an analysis within a social accounting matrix (SAM) model and, further, to a multi-regional SAM (MRSAM) model. Comparing the results from the three alternative models shows that the key sectors identified with the alternative models are considerably different. This finding points to the necessity of using SAM-based models for an accurate key sector analysis and offers valuable implications for regional policymakers whose main interest is identifying the industries that they target for the economic development of their regions.

中文翻译：

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漏水以下地区的关键行业分析

关键部门分析历史悠久且丰富。但是，几乎所有以前的分析都是在国民经济的投入产出（IO）框架内进行的。本研究（1）对由于大量进口和非居民赚取的大部分要素收入而遭受严重产业收入流失的地方（或地区）经济进行了分析，（2）扩展了以前基于IO的分析，再到社会会计矩阵（SAM）模型内的分析，再到多区域SAM（MRSAM）模型。比较这三种替代模型的结果，可以发现，用替代模型确定的关键部门差异很大。