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This paper examines the behavior of the Central Bank of Tunisia in the conduct of its monetary policy. To this end, a Taylor rule for the interest rate is estimated using a smooth-transition regression model over the period 1990-2008. We find that the Central Bank’s reaction function is non-linear, convex with regard to inflation, concave with regard to the output gap, and that inflation aversion outweighs recession aversion. The main policy implication of these findings is that inflation and recession risks facing monetary policy-makers spur the Central Bank to pursue a risk-management policy for its key rate.