The analysis of merger decisions since 2003 suggests the Commission is increasingly focussing on wider geographic markets: in the last two years, no fewer than 61% of Commission merger decisions assessed a market that was EEA or wider in scope, compared to 48% ten years ago. Over time, the Commission has changed its market definitions, adapting its decisions to new developments in the market. Market definition is not a policy statement. The Commission doesn't define markets, markets define themselves. A market definition is based on business reality: it is a factual and empirical exercise... undertaken on a case-by-case basis. Its goal is to identify the effective alternatives for customers of the merging parties. This explains why, despite globalisation and increased European integration, many markets still remain national. Topical examples of various cases from industries like consumer goods, beverages or telephony services illustrate why this is the case. Examples of US merger cases reveal that our counterparts analyse these markets very similarly.