We do, but they’re usually not very inaccurate, and they also don’t directly impact on a politician keeping her job. If you know that 27% of people in the country quite like the Greens but not as much as the Tories (or whoever) that’s one thing. If you know that 27% of the people whose votes you need in order to stay in power like the Greens, that’s a very different piece of information.
Because just asking the question doesn’t actually affect their job. Otherwise why not just have a dictator and a lot of polls? The whole point is that this information is used to select MPs.
(BTW I made a typo in the previous response—“usually not very inaccurate” should be “usually not very accurate”).
Here you said that the advantage of AV was that politicians knew more about who voted for them, whose votes they needed, etc. I pointed out that there are easier ways of getting this information. Asking the question doesn’t directly affect their job, but neither do all those extra votes.
In both systems, you have an election, and then a bunch of extra information, which the MP can find useful/make them take into account other voters. In one system, this extra information is gathered at the ballot, in the other, in separate polls. There’s no other relivant difference except that one is cheaper (and monotonic!)
Your dictator response is mistaken because both systems have a No-dictator part; the bit at the ballot where an MP is elected. But both also have a separate ‘more information’ part, which was why you prefered AV—but which seems to be done better by independant polling.
Now you’re making a different argument—you have to show that making your decide_winner function take more arguments is going to improve the quality of the output, and it’s far from clear it will. You could put more information into the system by asking every voter to list their favourite colour, but unless you can show that this would actually improve the output, it’s irrelivant.
Having more information can allow us to have more accurate beliefs, but it’s not the case that putting more marks on a ballot paper will lead to a better result, especially when you’re pushing against Arrow.
Well, we already have lots of polls.
We do, but they’re usually not very inaccurate, and they also don’t directly impact on a politician keeping her job. If you know that 27% of people in the country quite like the Greens but not as much as the Tories (or whoever) that’s one thing. If you know that 27% of the people whose votes you need in order to stay in power like the Greens, that’s a very different piece of information.
So why not just have polls that ask that question? It’s not that expensive to get a YouGov to run a poll; much less than running a referendum is.
Because just asking the question doesn’t actually affect their job. Otherwise why not just have a dictator and a lot of polls? The whole point is that this information is used to select MPs. (BTW I made a typo in the previous response—“usually not very inaccurate” should be “usually not very accurate”).
Here you said that the advantage of AV was that politicians knew more about who voted for them, whose votes they needed, etc. I pointed out that there are easier ways of getting this information. Asking the question doesn’t directly affect their job, but neither do all those extra votes.
In both systems, you have an election, and then a bunch of extra information, which the MP can find useful/make them take into account other voters. In one system, this extra information is gathered at the ballot, in the other, in separate polls. There’s no other relivant difference except that one is cheaper (and monotonic!)
Your dictator response is mistaken because both systems have a No-dictator part; the bit at the ballot where an MP is elected. But both also have a separate ‘more information’ part, which was why you prefered AV—but which seems to be done better by independant polling.
No, because the information here changes the result of the election. That’s the whole point...
Now you’re making a different argument—you have to show that making your decide_winner function take more arguments is going to improve the quality of the output, and it’s far from clear it will. You could put more information into the system by asking every voter to list their favourite colour, but unless you can show that this would actually improve the output, it’s irrelivant.
Having more information can allow us to have more accurate beliefs, but it’s not the case that putting more marks on a ballot paper will lead to a better result, especially when you’re pushing against Arrow.