Stata 15 help for reldif()

[FN] Mathematical functions


reldif(x,y) Description: the "relative" difference |x-y|/(|y|+1); 0 if both arguments are the same type of extended missing value; missing if only one argument is missing or if the two arguments are two different types of missing Domain x: -8e+307 to 8e+307 or missing Domain y: -8e+307 to 8e+307 or missing Range: -8e+307 to 8e+307 or missing

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