Intraregional input-output analysis is widely used for measuring economic impacts which are derived from public investment. But in the usual intraregional input-output analysis, the Bounding-back effects that is a kind of intraregional repercussion effects have been ignored since the interregional trades are given externally. We have presented simple method which could measure interregional Bounding-back effects by using intraregional input-output table. Using this method within the context of intraregional analysis is equivalent to interregional input-output analysis, the method even uses intraregional input-output table only. In this paper, we discuss the following two problems: In the first place, we pay attention to the intraregional input-output framework and the interregional trades, and discuss the structure of the bounding-back effects. And then, the economic impacts in a region which are measured by intraregional input-output analysis should be the same result as it which is measured by the method which divide a region into two regions, a method that we already have presented. But these results aren't the same. Then we pay attention to that matter. And consider the factor.