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Tag Archives: Tweets

An Upward Dow Helps an Incumbent President

No one seems to be talking about what really might have led to the Obama win.

The stock market.

The basic reasoning is that people connect their “social mood” to the incumbent and social mood directly relates to how the stock market is performing. Some think the mood precedes the market and others say the opposite. Whichever the sequence, though, there seems to be a correlation between rising stock markets and incumbent reelection. For President Obama, during his first term, the Dow had a compound annual gain of 8.8% as of October 24.

Sources and Resources: Just before the election, Floyd Norris wrote about the Dow and elections and presented the following chart. You also might want to read this econlife post about the correlation between Tweets and stock markets. (Researchers were surprised that they could use Tweets to predict market changes rather than the opposite.) Finally, I did see the term “social mood” in this paper but was not familiar with its academic source.

A Rising Dow Tends to Favor Incumbents

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Sometimes Tweets travel faster than seismic waves. And then, what happens?

In this wonderful webcomic from April 2010, an earthquake strikes, people Tweet, and within seconds, the news beats the temblor’s spread. Do people run for safety? No. They send new Tweets!

For the August 23, 2011 East Coast quake, 2 Harvard bloggers proved that truth does copy a cartoon. Calling it a tweetquake, they demonstrated that the 40,000+ Tweets that were sent within 1 minute of the quake radiated outward faster than the quake itself. You can see the Tweet spread here.

And here is how people were Tweeting about Hurricane Irene.

The Economic Lesson

Described in “Thinking Like an Economist,” (Lecture 6) from the Teaching Company, the economics of ignorance involves deciding how much information is optimal. Only when the benefit of an extra piece of information outweighs the cost of being ignorant should we be willing to add to our store of knowledge. While initially new data can be valuable, eventually, diminishing marginal utility starts to kick in and that extra piece of information is no longer worth our time or thought.

Even for a Tweet, then, we are always thinking at the margin, choosing a little more or less.

An Economic Question: When researching a topic, when does diminishing marginal utility set in?

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