A note on bivariate survival functions following a law of uniform seniority.

In a recent paper published in this journal, Genest & Kolev (2021) studied bivariate survival functions following a law of uniform seniority in the sense that these bivariate survival functions can be represented by a univariate one. While in that paper it is assumed that the survival functions are continuous and strictly decreasing on their support, we show that these assumptions are redundant in certain places. We also present simplified proofs on some of its results. [ABSTRACT FROM AUTHOR]