First, show me a study involving a large group of whites and blacks, with the same years of work experience, working at the same companies, who went to the same schools, majored in the same subjects, got the same grades, had the same test scores and are the same age.
This extremely narrow view of racism completely ignores the difference in material conditions between different races. Race was invented as a means to justify differences in class, and therefore intersects with class today. By trying to define racism in this classless vacuum, you end up misunderstanding it entirely.