[sangnoir]

> This is studiable and has been studied

True, but there has been more than one paper written on the subject, which don't all agree with the one you linked vis over-representation for crimes.

The black/white marijuana arrest gap, in nine charts

https://www.washingtonpost.com/news/wonk/wp/2013/06/04/the-b...

As you're probably aware, black Americans are arrested for marijuana possession far more frequently than whites. You may also know that there's not much evidence that black people consume marijuana with greater regularity than whites do.

...And this is a uniform phenomenon. It's not that some states treat the races equally and others treat them really unequally. Only in Hawaii are the rates even close to equal, and that's biased by the fact that blacks make up only 1.6 percent of the population. In the state with the second-lowest disparity, Alaska, blacks are 1.6 times more likely to be arrested. In the state with the biggest, Iowa, blacks are 8.34 times more likely to be arrested. D.C. has the second biggest; in the District, blacks are 8.05 times more likely to be arrested.

[weberc2]

Do the findings control for which group uses more in public? My experience living in Chicago and Waterloo, Iowa (the "blackest" city in Iowa--http://www.iowadatacenter.org/Publications/aaprofile2016.pdf) suggests that this disparity alone could explain the disparity in arrest rates. It's quite possible that there's a cultural difference in drug abuse that could skew the results.