the fact that someone asked the question would suggest hat it may influence their decision
it really depends on if you are trying for the best hand or it you are trying to have a better hand that you opponet
assume hands can be rated from 1-100 (uniform distribution)
in the first case mulligan if you hand is bellow average (50 or lower)
in the second case if you opponent mulligans they could get a hand from 1-100 and you should keep and 51+ hand you have, if they keep you can assume they have a 51+ hand and you only keep hands that are 76+