[DanielStraight]

All those artists are part of a genre we in America call "country music". It is basically the modern, more pop-like evolution of the music of artists like Johnny Cash, Patsy Cline, Hank Williams (senior), and Willie Nelson. And if you haven't heard of those artists, you should check them out. If you're interested, the best modern country artist (in my opinion at least) is someone not appearing on the list: Brad Paisley.

[bambax]

Oh, ok. I know and love Johnny Cash, Tammy Wynette et al. I don't know existing country artists.

I would guess this "music analysis" is in fact a proxy for other predictors such as location (inland / coastal regions) and age, no?

[mason55]

age

The first thing I thought was that I'd love to see this with age accounted for as well

[epmatsw]

Brad Paisley is a great recommendation. I'd also recommend George Strait (#2 on this list).