The actual study quoted:<p><a href="https://www.thirdway.org/report/the-opportunity-index-ranking-opportunity-in-metropolitan-america" rel="nofollow">https://www.thirdway.org/report/the-opportunity-index-rankin...</a><p>Note that a middle class job in their definition pays around $44k to $80k while "professional" jobs are >$80k and the data is really for a family of four when accounting for middle class and professional.