Recent studies in the United States concerning short term advertising strength and effective frequency have triggered numerous important questions in Europe. In France, the great majority of advertisers continue to use pulsing strategies. Single-source data has been available in France since 1996 creating new research concepts in addition to direct STAS application. This document describes sixty-nine STAS calculation results. Also developed in this document are different approaches to recency and the best way to test media planning alternatives.