CHARLOTTE—For the last month, Team Romney has been playing a dangerous game with the Democratic Party. With its false attacks on the administration’s welfare waivers and its constant invocation of his policies, Team Romney has tried to present their candidate as the true heir to Bill Clinton.

CHARLOTTE, NORTH CAROLINA—Delegates were enthusiastic for every prime-time speaker at the Democratic National Convention last night. San Antonio mayor Julian Castro received big applause for his riff on opportunity—“My mother fought for civil rights, so that instead of a mop, I could hold this microphone”—and former Ohio Governor Ted Strickland won cheers for his harsh attacks on Mitt Romney’s “economic patriotism.”

But for all of its excitement, the crowd saved its adulation for Michelle Obama’s closing message to tonight’s session of the convention. She was a superstar—delegations passed out “Michelle Obama” signs, attendees stood and clapped at every opportunity, and on several occasions, she was drowned out by the roar of the crowd.

Before San Antonio Mayor Julian Castro walked onstage at the Democratic National Convention, the crowd was already pumped. They'd laughed and cheered as Massachusetts Governor Deval Patrick and former Ohio Governor Ted Strickland lambasted Mitt Romney—the former with righteous indignation, the latter with humor at full volume. After Castro exited, Michelle Obama, now unquestionably the most popular woman on planet Earth, took the stage with a speech that left both crowd and pundits—left and right—spellbound. Consequently, despite weeks of attention on the young Latino mayor, Castro's perfectly serviceable keynote speech isn't likely to be the one that everybody remembers. But that hardly means he failed. In fact, "perfectly serviceable" may have been the desired result.

When Mitt Romney gave his convention speech on Thursday, as far as we can tell the collective response from the everyone in the country was, "Meh." I haven't seen any Democrats who said it was a disaster, but I also haven't seen any Republicans who said it was fantastic. And lo and behold, Gallup reports that 40 percent of respondents in their poll said Romney's speech made them more likely to vote for him, while 38 percent said it made them less likely to vote for him. That net positive of +2 makes Romney's the least effective speech since Gallup started asking this question in 1984. That's probably partly because the speech was nothing special, and partly because people are largely going to react along partisan lines no matter what it actually contained.

But one thing that's weird about this is that 78 percent of people expressed an opinion about Romney's speech. And in a separate question, a nearly identical 76 percent said they had watched at least some of the Republican convention. If that were actually true, it would have been the highest-rated convention in history. But of course, it isn't.

Harvard University political science Ryan Enos reports some important findings:

Mitt Romney is better looking than almost everyone reading this blog.  Back in 2008, I wrote about how Sarah Palin’s looks put her in the 95th percentile of politicians.  Romney has even Palin beat—he scores above the 99th percentile.

These results come from a study with my colleagues Matthew Atkinson and Seth Hill, in which we developed a method for obtaining the ratings of the facial competence of governor and Senate candidates from 1994 to 2006 by showing the images of these candidates to undergraduate students for 1 second, as pioneered by Alex Todorov.  In 2007, when we collected this data, we removed highly-recognizable candidates so that opinions about the candidates, other than their appearance, would not affect the ratings.  However, as with Palin, we are fortunate that Romney was a relative unknown at the time (at least to the undergraduates in California that we used), so we obtained a rating of his face.

And what a face it is!  We gathered the ratings of 728 candidates for Senate and Governors’ seats and Romney outscored all but four of them.  The only persons to win election that beat him are Russ Feingold (the best looking Democrat) and John Thune (the best looking overall).  Romney also appears to far outdo Paul Ryan, who came in in the 67th percentile of the 2004 House candidates (although the photos did not include abs).  (Also, that study only included white male candidates and the House was not measured on a common scale with Senators and Governors, but I’d feel pretty confident saying the 67th percentile of the House puts you well behind Romney).

We don’t have a rating of Obama because we deemed him too well-known, even in 2007, because his Senate race had attracted a lot of attention and there was already an excitement building around a possible White House bid.  However, we do have a score for Biden—and Romney has him beat badly.  Biden only comes in the 62nd percentile of Senate and governor candidates.

So, if the election were decided on looks, it would be no contest.  Fortunately for Obama and Biden, the election is not decided by looks.  As we point out in our paper associated with the study, most of the correlation between candidate appearance and election outcomes is probably spurious.  Very few voters are willing to cast their ballot for a candidate based on looks – we estimate that if a candidate moves from the 25th to the 75th percentile in attractiveness, this is likely to gain that candidate about 3.5 percentage points in vote among independent voters, which was not enough to decide the winner of even a single Senate race out of 99 that we examined.  Rather than good looks directly affecting voters’ decisions, it is likely that good looking people like Romney have a lot of success in life, obtain significant human capital—education, career success, education—and because of all they have to lose, they are strategic about which races they enter.

In a certain respect, Romney’s career both fits and is counter to this explanation, because he ran for Senate in 1994, against Ted Kennedy when he did not have a good chance of winning, but he did not run for Governor until 2002 where he used his good looks and the considerable capital he had earned from the Salt Lake City Olympics to run in a seat with no incumbent.  Of course, Romney may not have been able to be as strategic about when to run for President – and unfortunately for him, most voters seem to have made up their mind long ago—nevertheless, if a candidate’s appearance every can make a difference, it should make a difference for Mitt Romney and his face in the 99th percentile.

If you tuned in to the Republican National Convention last night hoping to learn something about Mitt Romney, you probably came away satisfied. With a video highlighting his family and role as a father, his campaign did an excellent job of presenting the candidate's humanity. Romney himself added to the success, with a speech that went a long way toward reintroducing him as not just a cold automatron.