Display:
that one-third of the electorate remained undecided well into election week? I imagine what pollsters do is ignore the undecideds and extrapolate from those respondents that do state a preference. This of course inevitably introduces a special kind of error - respondents that have a preference cannot be representative of those that don't. In a "normal" election, that error can be neglected; in the present case, it could not. To make my point as clear as possible: suppose you saw before the election a poll that said (phantasy numbers, just trying to simplify):

CDU/CSU 40%
SPD 30%
Linke 10%
FDP 10%
Greens 10%

But the data this poll was supposed to reflect would have really looked more like this:

CDU/CSU 28%
SPD 21%
Linke 7%
FDP 7%
Greens 7%
UNDECIDED 30%

And this is exactly what the pollsters should have published.

One more point: I'm highly sceptical of the theory that the massive swing away from the Union was mostly caused by loyal CDU/CSU voters who went for the FDP in order to prevent a grand coalition. First off, this doesn't make too much sense. The only way "lending" votes to the FDP could have helped prevent a big coalition was if the FDP was in danger of falling short of the 5% threshold. But that danger was never apparent in the polls! Secondly, only half of the votes the Union lost actually went to the FDP. Infratest-Dimap projects that the CDU/CSU lost 1,110,000 voters to the FDP and a combined 1,100,000 votes to the Linke, "others" (i.e., mostly, Neo-Nazis), and above all to non-voters. In my opinion, what happened here was quite clearly a no-confidence vote against Merkel.

If you can't convince them, confuse them. (Harry S. Truman)

by brainwave on Tue Sep 20th, 2005 at 04:32:02 PM EST
...one-third of the electorate remained undecided well into election week? ...In a "normal" election, that error can be neglected; in the present case, it could not.

That may well be. I have the memory of a long line of elections in which the losing side, which also trailed in the polls, sought to keep up hopes by pointing to a large number of undecideds (and various vactors why they would like this party more) - only to end up with the undecideds splitting the same way as the opinionated. But this years' German elections were a truly complex choice for voters.

But the data this poll was supposed to reflect would have really looked more like this:
...
UNDECIDED 30%
And this is exactly what the pollsters should have published.

Fair point! (Actually, this is done in polls in Hungary, because the undecided and refuse-to-answer 'fraction' was always high.)

loyal CDU/CSU voters who went for the FDP in order to prevent a grand coalition. First off, this doesn't make too much sense.

You assume all voters to be as rational as you or me :-) But, it can be rational too: if you are a loose supporter of a right-wing government rather than a staunch CDU/CSU voter, you may think that if a Grand Coalition comes, it is better to have a strong FDP as opposition. At any rate, on election night, ARD showed that support for a grand coalition fell from around 40% to 20% while support for black-yellow changed the opposite way since the last poll, just at the same time as there was the CDU to SPD swing.

I agree it wasn't just the CDU/CSU to FDP swing, in fact that's what I wrote of below the fold. Regarding the Infratest-Dimap voter migration figures, I have to ask whether they concern voter movements in the last week - or voter movements since the 2002 elections. (I suspect the latter.)

*Lunatic*, n.
One whose delusions are out of fashion.

by DoDo on Wed Sep 21st, 2005 at 03:39:10 AM EST
[ Parent ]
Forgot this:

In my opinion, what happened here was quite clearly a no-confidence vote against Merkel.

That sure played a role in the CDU slump over the last few months and after the TV debate, but in the last few days? On second thought, it very well could: in the undecideds' minds.

*Lunatic*, n.
One whose delusions are out of fashion.

by DoDo on Wed Sep 21st, 2005 at 03:50:33 AM EST
[ Parent ]

Display:
Login
. Make a new account
. Reset password
Occasional Series