december 16 1999 industrial cluster analysis of the virginia economy by roger r stough peter arena raj kulkarni jim riggle mark trice mason enterprise center ms 2c9 institute public policy george university fairfax va 22030 4444 corresponding author rstough gmu edu i preface ii acknowledgements this report has been conducted in a relatively short period and therefore under considerable deadline pressure it could not have completed several months available without timely contributions number individuals these include bob schwartz maxine lunn at for innovative technology cit fred williamson jerry simonoff office secretary jude franklin planning research corporation carefully read commented on all drafts made crucial recommendations design use spider diagrams that became central to illustrating structure state s clusters we also thank approximately 170 focus group participants around who informed their assistance subsequent experts officials shared time help us through personal interviews study as effectively