What are the 10 biggest for-profit companies in this field?

How is the market distributed?
Where are they located? Are there any incentives for specific locations?
Correlate them with their main outputs (Data. Narratives. Tools)
Understand and identify cases where these companies are “experimenting” or “adopting” commons-based approaches
Identify these cases and treat them as entities that will also be placed in our mapping device (the quadrants)
Identify what companies are the “Microsofts” of the field and what companies are the “IBMs” of the field

Biggest For-profit Companies

"Market share for new textbooks (that is, the $4.2 billion piece) is highly consolidated, with 6 publishers holding about 85% of all sales dollars (Pearson, Thomson, McGraw Hill, John Wiley, Houghton Mifflin, and St. Martin's/Von Holtzbrinck). Although college publishing remains highly profitable for the large players, with reported EBITDA in some instances as high as 30%, growth has stalled, due in large part to the rise of the used book business, which represents the key strategic issue in the industry today." (Esposito 2005, 2)