Interesting! "Black-White Mortality Crossover: New Evidence from Social Security Mortality Records," by Casey Breen osf.io/preprints/so.... (This question was the first demography project I ever worked on, in a summer internship at NCHS.)

My God, that debate is still going? I was at Penn back in the 90s when Sam and Irma were working on their 1996 Demography paper.