Ensuring equal access to the latest cancer medicines is one of the most pressing challenges facing OECD health systems today. Despite the emergence of new oncology drugs, disparities in patient access—particularly through clinical trials and early access programs—remain a critical issue....

This paper examines the presence of seasonality in CPI in 36 OECD economies that provide monthly CPI data and reviews the properties of standard methods, namely X-13 and TRAMO-SEATS, in performing the adjustment. Evidence from statistical tests points to the presence of seasonality in headline...