College-store association challenges `dual discounting'

Focuses on reasons for the difference in cost of college textbooks at college bookstores and retail bookstores. Why academic publishers are charging campus store more for books that are assigned for classes than they charge retail bookstores for the same titles; A lawsuit being filed by an association of college stores against Cambridge University Press, Oxford University Press and Addison Wesley Longman; Why these publishers engage in `dual discounting.'