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A Study on the Reliability of RAS Technique with Estimated Data

하현욱 1,  KIM, HO-YEON 1

1성균관대학교

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ABSTRACT

The RAS technique stands out among various non-survey methods for regional input-output analyses owing to its high level of accuracy. The technique utilizes survey-based information for total gross outputs, total interindustry sales and total interindustry purchases at the regional level. Due to prohibitive costs of obtaining the required information, most of the existing studies for regional input-output analysis in Korea have resorted to estimated data drawn from published statistics. However, is the accuracy of the RAS procedure retained in this case? This paper conducts a couple of analyses for the RAS technique when second-hand data are employed. First, the coefficients for two regions, Busan and Daegu, are estimated using both RAS technique and Simple Location Quotients. Secondly, we test the robustness of RAS using three variations of interindustry purchases data. The two methods yielded similar results, and the RAS technique is found to produce quite stable outcomes against the errors inherent in the data.

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