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O presente trabalho analisa a indústria de refino de açúcar no Brasil e identifica o comportamento da sua concentração de mercado para a região Centro-Sul do Brasil, baseado no modelo do jogo de dois estágios de Sutton (1991). Procurou-se analisar a influência dos distintos níveis de competição via preço e barreiras à entrada sobre a sua estrutura de mercado. Também se analisou a influência de fatores exógenos na determinação da concentração de mercado do setor. Compararam-se os resultados com os encontrados por Sutton (1991) para outros países. Verificou-se que a indústria de refino de açúcar no Brasil iniciou-se com pequenos e médios grupos comerciais, sendo o setor regionalmente concentrado. Durante a fase de intervenção destaca-se a alta concentração da indústria (na década de 1980 o CR4 foi de cerca de 80%). Observou-se entre as décadas de 1990 e 2000 o surgimento de marcas menores e a perda da participação de mercado da marca líder (União). Uma das explicações para o forte caráter concentrado da indústria são as barreiras à entrada ao setor: assim como as indústrias de açúcar refinado dos países analisados, a indústria de açúcar refinado do Brasil apresentou, em 2003, alto sunk cost exógeno em relação ao tamanho de mercado. The aim of the present work was to evaluate the refined sugar industry in Brazil and to identify its market behavior in the central region in Southern Brazil. Accordingly, this study analyzed the influence of distinct levels of competition concerning price and entrance barriers on the market structure, described by Sutton (1991). Some exogenous factors, such as public regulation, sectorial organization, and strategies to set up costs, were also verified to determine the market sector's concentration. Results of the present study were compared to those reported by Sutton (1991). The result evidences the high index of set up costs and existence of barriers of entrance. The industry of refining sugar in Brazil was initiated with small and average commercial groups, with a regionally-concentrated sector. During the regulated period the industry was highly concentrated (by the 1980s the CR4 was about 80%). In the 1990s, there was a great entrance of new brands and consequently a decline in the leader brand (União). One of the reasons that such industry is highly concentrated is the huge sunk cost. Like the refined sugar industry analyzed in other countries, the Brazilian refined sugar industry presented, in 2003, high exogenous sunk cost in relation to the size market

Estrutura de mercado da indústria de refino de açúcar na região Centro-Sul do Brasil