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This paper estimates the markup ratios in whole economy and in several sectors in Senegal in order to measure the degree of competition. It is based on macroeconomic and panel data. The results based on macroeconomic data provide a markup estimated at 2.98 in other words the prices are about three times higher than the costs. While the estimates on data of panel evaluate the markup at 1.22; what contrasts with the markup obtained with the macroeconomic data. Nevertheless, these results reveal a weak degree of competition in Senegal. The service sectors in particular trade, transport are identified as sectors where competition could be reinforced.

JEL Classification: C20, D49

Keywords: Competition, markup, estimation