The document discusses the growing article economy industry, which was estimated to be worth $1.6 billion in the US and $2.4 billion worldwide in 2003. It outlines several drivers of this industry, including widespread metadata access, high rates of undiscovered relevant articles, and budget cuts forcing libraries to focus on access over ownership. The document then examines various licensing models for articles, such as pay-per-view, bundling by content type, age, market, or region. It emphasizes the need for publishers to define pricing rules carefully and target the right markets to evaluate different strategies in this evolving industry.