Boston-Total e-marketplace revenues will hit $9 billion by 2005, according to a new report by The Boston Consulting Group Inc. The report, "The B2B Opportunity: Creating Advantage Through E-Marketplaces," predicts that U.S. b-to-b e-commerce will generate productivity gains equivalent to 1% to 2% of sales. Results from 2000 were not available. Boston Consulting Group's projections, while sanguine, fall short of revenue projections by several other consultancies. "While our projections show that e-marketplaces will grow rapidly, they won't generate the kind of blockbuster revenues that many may have expected," said Boston Consulting Group VP Andy Blackburn in a statement.