But while price discrimination is certainly lauded by the companies that rely on it, it's not at all clear that having courts perpetuate such pricing schemes benefits anyone beyond shareholders of those companies.
Ignore the economic-theory arguments about goods that need price discrimination to get produced at all, isn't it obvious that the students who get lower-priced books benefit?!
Were I ruling I'd probably side with the majority here... but I do now work in an industry dominated by price-discrimination through the use of high list prices (compared to street prices). It is also worth taking some care to preserve the right of authors to sell foreign publishing right separately, rather than providing a loophole where North American rights are converted to global English rights by the expedient of "selling" books to a subsidiary.