Joker scored incredibly low on Mediaversity, 1/5 score for race, only 11% of the cast and crew were poc, also a 1/5 score for gender and a 1 point overall deduction for its portrayal of people with disabilities
massive box office success
how do they account for this in their study?
Of note, some movies that received very low Mediaversity Reviews scores, and thus scored Below
the Norm on our rating of AIR, did receive positive critical acclaim and did do well at the box office
(e.g., Joker, La La Land, Greenbook). However, our analyses highlight that regardless of the critical
acclaim of a film, money is still being left on the table if the film lacks AIR.
ah ok Joker left money on the table

also they don't list their 109 films anywhere nor any actual data, and their methodology was to split all films 50/50 on the edge of an average score, there is no granularity at all
reading some of the mediaversity scores for some of the films they mention comes across as completely arbitrary, sometimes they say "well this film had a lot of diversity in cast and crew but still did a bad job therefore 1 out of 5"