Is Princeton University discriminating against Asian-American applicants?

A study published by Princeton's own researchers concluded that an Asian-American applicant must score 50 points higher on the SAT than a white applicant just to have the same chance of admission. (http://opr.princeton.edu/faculty/Tje/EspenshadeSSQPtII.pdf)

However, Princeton refuses to release test scores and admission rates by ethnicity, saying the public has not asked for the information.

As a member of the public, I request that Princeton release average test scores and admission rates on its applicants by ethnic group (African-American, Asian-American, Hispanic, and White). Only a more transparent process can shed light on allegations of discrimination.

If Princeton refuses to do so, what is it trying to hide?