The present paper focuses on testing and ranking regional input-output Models for the GCC countries based on several economic and statistical criteria using the following regional I/O Models: SLQ, POLQ, CILQ, CMOD, RND, RMOD,SDP, RAS, MSDP, IP and H. MM, and the following statistical Criterial:
Mean Absolute Difference, Correlation Coefficient, and Mean. Similarity Index. Information Content, Chi Square, I values, Mean. Percentage Error of Coefficient and SD percentage Error. The final outcome of this research is recommending using MRAS and RAS technique due to their relative efficiency over all other techniques according to all statistical and Economic Criteria used in the study. We also came to conclusion that it is very necessary to have at least one of complied regional I/O table by survey technique for every region every five years and yearly survey for some specific sectors.