hrotha said:
I'm not claiming such a thing. I'm saying when trends are noticeable over several years, they're probably significant. The more stages/tours you include in your analysis, the less of an impact those conditions you're talking about will have on the observed trend.
You started by saying that using a full set of 21 stages normalises the non aerobic capacity factors (given that what we're discussing is to what extent different tours were clinic ridden) to give a relatively fair judgement.
As to the conclusion, I have no set opinion of which tours were or were not, or were worse, or whatever.
But I really don't think the idea that the factors are "normalised" by taking all 21 stages is true in the slightest, because these non aerobic factors are selg evidently connected within any given 21 stages.
The best forecast of the weather on record is to assume it will repeat the day before, and the level of attacks depends on the riders present - all the same for a given tour, but differing between tours.
Put simply, the bookies would not allow you to take an in tour multiplier bet on these factors, because they are connected, and so they will not equalise by averaging the 21 days.