Wednesday, April 20, 2011

Meta-analysis of marriage polls


Nate Silver, the master analyst of polling meta-data, analyzes this trendline and comments on the new CNN poll.
This is the fourth credible poll in the past eight months to show an outright majority of Americans in favor of gay marriage. That represents quite a lot of progress for supporters of same-sex marriage. ....

The change — about a 4 percentage-point shift in favor of gay marriage in each of the last two years — is about double the longer-term rate of progress for supporters of gay marriage, which has been between 1 and 2 percentage points per year....

[o]ponents of gay marriage almost certainly no longer constitute a majority; just one of the last nine polls has shown opposition to gay marriage above 50 percent....

If support for gay marriage were to continue accelerating as fast as it has in the past two years, supporters would outnumber opponents roughly 56-40 in the general population by November 2012.


Tomorrow: a breakdown of the demographics in the new CNN poll.

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