中文摘要：

国民经济系统中产业之间既存在关联，又存在经济距离．关联反映产业之间联系程度的紧密，经济距离反映产业之间中间生产环节的多少．本文结合投入产出关联度和APL模型两种方法各自的优点，创建了区域产业关联经济距离模型，包括前向关联经济距离指数和后向关联经济距离指数，并采用1997-2007中国区域间投入产出表的电力热力业作了实证分析．研究结果表明，从初始投入的上游产业来看，1997-2007年在中国8大区域的区域内和区域之间，呈现出采选业与电力热力业以及电力热力业与其自身的关联程度最大且经济距离最短；从最终需求的下游产业来看，1997年重工业与电力热力业以及电力热力业与其自身的关联程度最大且经济距离最短，2002年则增加了建筑业与电力热力业关联程度最大且经济距离最短，2007年除了京津区域的建筑业与北部沿海区域的电力热力业的关联程度最大且经济距离最短外，其余均为电力热力业与其自身的关联程度最大且经济距离最短．研究结果进一步显示，1997—2007年8大区域中电力热力业上下游生产链在区域内的能源经济联系比区域间更紧密．受空间成本的影响，绝大多数区域的能源对外联系仍以相邻区域为主导．

英文摘要：

There are both a linkage relationship and economic distances between sectors in the national economic system. The linkages between sectors show their interconnection, and their economic distance reflects their intermediate production links. This paper synthesizes the advantages of the average production lengths model and relevancy of input-output method, and constructs a regional industrial linkage and economic distance model, including the forward linkage and economic distance index and the backward linkage and economic distance index. Then, we calculate these indexes according to eight-regional-input-output table for China in 1997, in 2002 and in 2007. The results show, from the viewpoint of the primary inputs of upstream industry, that the greatest interconnection and the minimum economic distance is from the sector of mining to the sector of electricity and heating power production and supply; and from the point of the final demand of the downstream industry, that the greatest interconnection and the minimum economic distance is from the sector of electricity and heating power production and supply mining to the sector of heavy industry or the sector of construction during the period from 1997 to 2007 either intra-region or inter-region. We find there are greater interconnections in intra-region than inter-region for the upstream and downstream industries of the sector of electricity and heating power production and supply, and the greatest spatial energy interconnection takes place in the vicinity of most of the eight regions because of spatial costs.