New York--Business-to-business ad page growth is continuing its upward trajectory. Ad pages for the first half of 2000 were up 5.9% over the same period last year, according to newly released information from The Business Information Network. B-to-b ad spending, meanwhile, was up 13% in the first half. The leading sector in ad page growth was finance, business and advertising, up 57%. BIN is a joint venture between American Business Media and Competitive Media Reporting.