it would be neat to study how often breakaways succeeded prior to radios being popular and compare it to how often they've succeeded with radios being used. Then if radios are banned, you could update the study and hypothesize the new rate will be more like the older rate without radios. I bet the french have already done this for the tour but unless you can actually find evidence it's been done, why not do it yourself? And when i say rate, i mean a ratio of breaks winning compared to total road races, stages minus tts. you could also disregard tough mtn stages etc.