WHAT APPEARS TO MAKE SEA EFFECTIVE IN DIFFERENT PLANNING SYSTEMS.

If Strategic Environmental Assessment (SEA) is to develop into an effective decision support instrument globally, then it should not just rely only on the input provided by a selected group of countries. In this context, the understanding of how to apply SEA effectively in different planning systems is unlikely to improve if the knowledge about those systems is limited. This paper establishes what appears to make SEA effective in two countries with different planning systems: Italy and the UK. Italy is chosen as an example, representing a specific Southern-European planning culture, which to date has not contributed to the SEA literature to any great extent. Based on empirical observations, it is suggested that the SEA effectiveness elements portrayed in the international literature are not fully valid. The UK is chosen as an example, which represents a specific Northern-European planning culture. Countries representing this planning culture have contributed heavily to the international SEA literature and have influenced the development of SEA theory strongly. In this context, the SEA effectiveness elements and benefits portrayed in the international literature appear to be valid. As part of a PhD research project, this paper builds on the findings of a content analysis of the international SEA literature (Fischer and Gazzola, 2006). [ABSTRACT FROM AUTHOR]