''A note on the determinants of inflation starts in the OECD'' Christopher Bowdler, Nuffield College Luca Nunziata, Nuffield College Abstract: Boschen and Weise (Journal of Money, Credit and Banking, (2003)) model the probability of a large upturn in inflation. We extend their work to show that openness to trade exerts a negative effect on the probability of such an event. Keywords: Inflation starts, trade openness. JEL classification: E31, F41.