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This article aims to identify suppliers to the oil industry, natural gas and naval located in Rio Grande do Sul and, in particular, in the COREDE South, inserted the Rede Petro/RS and SEBRAE, and perform a brief comparative analysis the degree of concentration of economic activities among the eight COREDES with more employees. In this regard, special attention to South COREDE observing, over the years, there were changes in the degree of concentration of its activities due to the operation of the Polo Naval and Offshore. To obtain the concentration indices was adopted the methodology of the Hirschman-Herfindahl index (HH), calculated with employment data from the RAIS. The results of this work show the tendency of COREDES Metropolitano, Vale do Rio dos Sinos and Serra are consolidated as major suppliers to the Polo Naval and Offshore Rio Grande, and the South COREDE participating in said chain with a small number of companies, many of them providers of low value-added services. The evidence also reveal that the activities of the Polo Naval and Offshore Rio

POLO NAVAL E OFFSHORE DO RIO GRANDE: DESAFIOS COLOCADOS AO COREDE SUL