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Yes, maybe tuned a little

Outliers by Malcom Gladwell is basically about this and has a section on how kids born at a certain time of year have advantages over others (in sport), as they're more physically developed, and are more likely to getting scouted. Highly recommend if this kinda thing interests you.

Yes, great book. I thought he covered hockey as well.

This sounds like bullshit. Where on earth is age measured in the birth year instead of the birth day?

Nope, that's all joke.

Kids born at the beginning of the year used to be bigger than ones from the end of the year, and that's why have better chances to make a professional career, as teams need bigger players, rather than extremely talented ones.

Correlation is not causality.

There are two cutoff points, one in September at the beginning of the school year, and one in January at the beginning of the calendar year.

Oh hey guess where the two spikes are...

But it's about coaches and teachers, not the parents.

I believe they increased the number of critics who they polled, so the 2022 list represents a broader community, which may account for some of the differences in the most recent list.

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It’s the cutoff, not when it starts. In most European countries such as my own, you play with people from your age group, which is your calendar year. So, people born in January are playing with people born in December, nearly a year younger. This is especially beneficial for physical sports where a year difference can be very influential.

That would explain the September jump, I would guess that one or more countries also uses June as the cutoff

I do not think you succeeded in treating a sensitive subject matter with respect or reverence.

The September one can be explained because some countries have a September cutoff for academics/sports instead of January. At least, from my experience, UK and US have a September cutoff. In Spain, France, Italy Im sure the cutoff is in January, I’m not sure about the rest.

is this just a line graph in excel?

Meh, I actually like it. The descriptor is pretty simple, and it allows the plotting of 4 separate (year, number of incidents, casualties, & fatalities) variables in two dimensions in a way that's pretty easy to take in

Since the outcome of the relative age effect is largely due to ,perceived’ talent when compared to peers and therefore better support, you could technically overcome the relative age dilemma by simply encouraging your kid regardless of what month they were born in :)

The parents did coitus in the preceding April, May and June, or the parents eloped to prepare for the World Cup in June/July and then stopped once competition began.

Same can be observed in all major European pro leagues

US has comparatively cheap airfare

I am not sure if 2021 is the most representative year.

I find it a little weird that old movies suddenly jump to spot #1. Like, did they just not know about them until last week?

My countries national football federation (KNVB🇳🇱) did a study about this and it was in fact right. Many younger players good players will never make it to the professional stage because they are physically underdeveloped in the junior categories.

Sadly, most professional clubs focus on prestation instead of potential.

Much of the US goes by the Sept cutoff too. There are some places that use raw age for sports but most use school class and the cutoff varies but usually is around Sept 1st or Labor Day