in the workforce induce firm relocation. Firms that serve larger markets relocate more often. It is also demonstrated that relocations are often a result of acquisitions， In the current paper， the determinants of firm relocation behaviour in twenty-one countries during the period 1997-1999 are analyzed. We demonstrate that internal growth factors measured by increases，。
but also decreases， mergers and take-overs， which are a consequence of external growth. 。