what PVI mix is best suited to describe a districts partisanship?

[lfromnj]

For example Cook PVI  works by taking 50% of the PVI from 2012 and 50% from 2016. However I am pretty sure 538 PVI works by taking 25% from 2012 and 75% from 2016.

So obviously 50/50 is a pretty bad idea as seen by districts such as Iowa 1st and Texas 7th/Ga 6th with the R+7 and R+8 PVI.

On the other hand a pure 100% PVI on 2016 may not be the most effective either as there is probably some ancestral voting left in the district.


What do you people feel is the best PVI mix?

On second thought can mods move this to congressional elections?

[100% pro-life no matter what]

The other big difference is that 538's numbers are doubled.  For instance, a 53-47 GOP district would be R+3 according to Cook, but R+6 according to 538.  Actually, I think 538 is more intuitive on that.

[lfromnj]

The other big difference is that 538's numbers are doubled.  For instance, a 53-47 GOP district would be R+3 according to Cook, but R+6 according to 538.  Actually, I think 538 is more intuitive on that.

it definetely is better for a person who doesn't fully understand PVI at all but in general im more talking about the mix as someone who understands that PVI works by vote share just understands to double it.

[Orser67]

I don't think 50/50 is a good mix, but 75/25 might be a little too weighted towards the most recent election. It would be interesting to look at a list of districts using a 66/34 PVI mix.

[OSR stands with Israel]

The other big difference is that 538's numbers are doubled.  For instance, a 53-47 GOP district would be R+3 according to Cook, but R+6 according to 538.  Actually, I think 538 is more intuitive on that.

it definetely is better for a person who doesn't fully understand PVI at all but in general im more talking about the mix as someone who understands that PVI works by vote share just understands to double it.

Shouldn't a 53-47 GOP District have an +8 GOP PVI since the Dems won by 2 points nationally

[100% pro-life no matter what]

The other big difference is that 538's numbers are doubled.  For instance, a 53-47 GOP district would be R+3 according to Cook, but R+6 according to 538.  Actually, I think 538 is more intuitive on that.

it definetely is better for a person who doesn't fully understand PVI at all but in general im more talking about the mix as someone who understands that PVI works by vote share just understands to double it.

Shouldn't a 53-47 GOP District have an +8 GOP PVI since the Dems won by 2 points nationally

I was meaning generically 53-47, not 53-47 in 2016.