Researcher Richard Sander has been fighting for years to obtain sensitive data collected by the administrator of California's bar examination to help him examine the effects affirmative action policies have on the performance of minority law school students.

On Thursday, the California Supreme Court will rule on the matter after an appeal court ordered the state bar to turn over the data to Sander.

Sander is a University of California, Los Angeles law professor who is seeking information on test takers' race, law schools attended, year graduated from law school, bar pass rate, law school grades and scores from standardized tests for admission to law schools.