DavidMRothschild on October 17, 2014 @ 5:48PM
The race for the control of the U.S. senate feels a lot like the race for control of the Electoral College (i.e., president), but there are a few crucial differences. First, the only thing that matters after the Electoral College convenes is who won the Electoral College, but minority party senators still get to vote for the next six years (and may tip the majority in the next election or sooner). Second, the Electoral College is 51 elections about the exact same two people, while senatorial elections are about 36 different sets of candidates. Thus, movements in the Electoral College are highly correlated, but senatorial elections are very independent.
DavidMRothschild on February 23, 2012 @ 11:13AM
Mitt Romney and Rick Santorum slugged it out tonight in Arizona, but the importance was all about Michigan. Santorum, as the frontrunner in the polls, was on the defensive for most of the night. Romney, as the actual frontrunner, was playing it safe. The strategy paid off for Romney. During the course of the debate, his likelihood of carrying Michigan rose from 66.2 percent, 15 minutes before the debate, to 73.6 percent, at the close of the debate. And, in correlation, Romney's likelihood of gaining the GOP nomination is up over 3 points on the day to 75.7 percent.
Election hinges on New Hampshire, where Obama has 59.4%: The Signal Forecast (Originally posted on Yahoo!'s "The Signal" Blog)
DavidMRothschild on February 20, 2012 @ 1:58PM
As though New Hampshire wasn't already overprivileged enough in the broken primary system, the state may be the one to tip the scales in the general election to either party. According to my new elections model, which orders the states from most to least likely to go to the Republican candidate, a GOP win in New Hampshire gives the challenger 270 votes to Obama's 268. If the president wins, he carries the election with 272 votes to his opponent's 266.
Our model, which I developed with Yahoo Research economist Patrick Hummel by analyzing data from the past 10 elections, gives Obama a 59.4 percent likelihood of winning in the Granite State. This number is slightly higher than our prediction in our first post about our equations last week because the Real Clear Politics average of presidential approval polls has increased from 48 to 49 percent. The most likely outcome is still that Obama will win by 303 votes, carrying Ohio and Virginia as well as New Hampshire. As we noted before, however, elections are just as subject to chance as football games, and if the contest were held 100 times, we'd expect the Republican to win about forty times.
Obama poised to win 12 election with 303 electoral votes: The Signal Forecast (Originally posted on Yahoo!'s "The Signal" Blog)
DavidMRothschild on February 16, 2012 @ 6:34PM
We'll dip into what the model says in a moment, but first a note about models in general: there are a lot of them, from complex equations generated by nerdy academics (like the work by Patrick Hummel and I seen here) to funny coincidences like the Redskins Rule, which holds that the incumbent party keeps the White House if Washington's football team wins its last home game. (This is true in 17 of the last 18 elections!) Every year, some of these models are right and some are wrong, and the difference is often just luck. As a result, models get a bad rap as being very good at predicting the past and lousy at predicting the future.
But every election gives researchers more data to work with and a better idea of what works and what doesn't. Not all models are bogus just because many of them are. Our model combines powerful scientific algorithms with both real-time and historical data sources. We have examined the last 10 presidential elections and found that our new model would have correctly predicted the winner in 88 percent of the 500 individual state elections.
The following chart shows our predictions for each state in the general election, based on this model:
Polls now favor Santorum, the ninth flip of the nomination (Originally posted on Yahoo!'s "The Signal" Blog)
DavidMRothschild on February 14, 2012 @ 10:39PM
Rick Santorum has slipped ahead of the Mitt Romney in the polls, marking an ignominious milestone in the Republican nomination: Since last summer, when Romney was at the top of the early polls, the lead has switched nine times. In order, it's gone to Rick Perry, Romney, Herman Cain, Romney, Gingrich, Romney, Gingrich, Romney, and Santorum, who now leads the Real Clear Politics' aggregated trend with 30.2 percent to Romney's 28.6 percent. Notice a pattern?
The Signal continues to predict that Romney will win the nomination. According to the prediction markets, he has a 72.8 percent likelihood to win the nomination, followed by Santorum at a non-negligible 17.8 percent. That's a far more vulnerable position for the former Massachusetts governor than he found himself in a few weeks ago, but it's still an uphill battle for Santorum. On the following chart, the vertical line represents when the first polls closed on Tuesday, February 7, when Santorum won three primary states (two for delegates and one beauty contest).
Santorum surging in Minnesota, but Romney’s biggest worry is now Obama (Originally posted on Yahoo!'s "The Signal" Blog)
DavidMRothschild on February 07, 2012 @ 7:11PM
Regardless of what happens tonight, Romney is still the heavy favorite to win the Republican nomination at 84.5 percent. That numbers assumes that he will likely lose in Minnesota and has a non-negligible likelihood of finishing third or even fourth in Minnesota.
The main result of Romney's struggles against the Republican field has not been a lowering of his likelihood of winning the nomination, but a lowering of his likelihood to win the presidency conditional assuming he wins the nomination. Romney's conditional likelihood of victory against Barack Obama has hit its lowest point since the campaign began in earnest this summer. He is just 41.0 percent likely to defeat Obama, should he face him as the Republican nominee. If it's any consolation, this is still higher than his Republican challengers.
Thus, it is not surprising that Obama has hit his recent high point, at 60.1 percent; this is his first time being above 60 percent for reelection since June. Not only does his likely Republican challenger appear to be a weakened candidate, he has had a string of news that boosts his likelihood regardless of his opponent. First, economic indicators are moving in the upward. Second, his job approval rating continues to climb; it is now 48.6 according to the latest aggregated trend on RealClearPolitics. This upward movement likely reflects that positive economic trend.
DavidMRothschild on February 07, 2012 @ 4:43PM
This is the table to follow this evening as the Minnesota Presidential Caucus unfolds:
Are elections as subject to chance as football games? (Originally posted on Yahoo!'s "The Signal" Blog * Joint w/ C. Wilson)
DavidMRothschild on February 06, 2012 @ 6:09PM
Here's one way to think about it: There are two sources of uncertainty when we model predictions for political elections and sports: incomplete information and true randomness.
First, there is information we do not know or cannot model. In politics we do not have the ability to sample all voters in our polls or eavesdrop on every candidate's strategy meetings; we can only speculate. In sports, likewise, we do not know the true state of a player's health or the coach's strategy for the team.
Second, there is randomness as to what will happen during the course of the event. In politics this includes private remarks that are captured on camera or whether a candidate knocks a question out of the park or flubs an easy one during a debate. Even the best politicians have bad nights (think of Gore's disastrous 2000 debate in Boston), just as the best receivers drop an easy pass every now and again (I am looking your way, Wes Welker).
The Twitter users who drove the furor over Komen and Planned Parenthood (Originally posted on Yahoo!'s "The Signal" Blog)
DavidMRothschild on February 05, 2012 @ 3:18PM
Last Tuesday, the Susan G. Komen Foundation announced it would no longer fund clinical breast exams and mammograms through Planned Parenthood. The $680,000 per year that was going to Planned Parenthood helped provide exams for 170,000 mainly low-income and minority women. The organization claimed that they were tightening their rules for grant recipients and denying grants to any organization under investigation. (A pro-life Congressman from Florida is leading a Congressional inquiry into whether Planned Parenthood uses public money to fund abortions--an initiative many see as politically motivated.)
On Friday, February 3 the organization abruptly reversed its decision amid a firestorm of criticism on Twitter, Facebook, and many blogs.There is little doubt that social and media pressure forced Komen to reverse its plan. The Figure shows the representative Twitter hashtags associated with Komen during the controversy, from January 31-February 3.
Mormon vote boosts Romney’s comfortable odds in Nevada (Originally posted on Yahoo!'s "The Signal" Blog)
DavidMRothschild on February 02, 2012 @ 6:31PM
The first thing that most people associate with Nevada is Vegas. About 70 percent of the population lives in Clark County, home to Las Vegas and the surrounding metro area. In 2008, Barack Obama won the county by nearly 20 percentage points. But Nevada's primary contest is closed, meaning only registered Republicans can vote. In 2008, about 50 percent of the Republican caucus goers were from outside of Clark County. And, most importantly for Romney, roughly 1 in 5 were Mormons, who voted 9 in 10 for Romney.
Mormons are 74 percent Republican and they have proven extremely loyal in voting for Romney, who is a leader in the Church. Thus, even relatively small Mormon populations loom large in the Republican primary, as most Mormons are Republican, they have a high voting rate, and are extremely likely to support Romney as a block: