Asked about the jobs crisis by Business Insider's Joe Weisenthal, the Nobel Prize-winning economist wrote that he in part blames "older economists, who have behaved a lot like the politicians, seizing on results they like and ignoring those they don't."
Some economists say that politicians have failed to address the jobs crisis with policies that are forceful enough. The government, they say, needs to send a clear message that it is committed to getting the economy out of this mess -- by hiring more workers, making the budget more sustainable or some combination of the two.
But Krugman noted in his email to Business Insider that economists have not done a very good job of guiding the policy discourse. Now, Krugman writes, politicians "have been awfully quick to seize on research that suits their preconceptions," even though that research may be flawed.
Krugman cited two examples of flawed research: research by economists Alberto Alesina and Silvia Ardagna arguing that austerity leads to economic growth, and a paper by economists Carmen Reinhart and Kenneth Rogoff that claims economies grow more slowly after their national debt exceeds 90 percent of GDP.
Republican politicians have been quick to seize on this research as proof that austerity would create jobs. But this research has been debunked by some economists. Recently, even the right-leaning American Enterprise Institute argued that austerity hurts broader economic growth.
Krugman has <a href="http://www.nytimes.com/2012/08/27/opinion/krugman-the-comeback-skid.html?_r=1" target="_hplink">slammed Christie</a> for touting a New Jersey comeback, even when the state still faces a 9.8 percent unemployment rate. He's also criticized the governor for his decision to raise taxes on low-income New Jersey residents, while vetoing a temporary tax boost for millionaires.
Krugman hasn't been shy about criticizing Ron Paul's economic theories, particularly his dislike of the Federal Reserve. Krugman said of Paul's interest in keeping the government out of monetary policy during a <a href="http://www.huffingtonpost.com/2012/04/30/paul-krugman-ron-paul_n_1465870.html" target="_hplink">debate on Bloomberg TV</a>: "If you think that you can avoid that you're living in the world that was 150 years ago." Krugman's also called <a href="http://www.huffingtonpost.com/2012/08/27/paul-krugman-gold-standard_n_1832767.html" target="_hplink">returning to the Gold Standard</a> -- a view Paul's touted for years -- "an almost comically (and cosmically) bad idea."
After presumptive Republican presidential nominee Mitt Romney announced that Paul Ryan would be his running mate, Krugman wasted little time deriding the Wisconsin Republican's views on the economy and budget. <a href="http://www.nytimes.com/2012/08/24/opinion/krugman-galt-gold-and-god.html?_r=1&hp" target="_hplink">Krugman wrote of Ryan</a> that he "evidently gets his ideas largely from deeply unrealistic fantasy novels."
After Harvard professor Niall Ferguson (left) penned a <em>Newsweek</em> cover story arguing President Obama doesn't deserve a second term, Krugman demanded that <a href="http://www.huffingtonpost.com/2012/08/20/paul-krugman-niall-ferguson-newsweek_n_1810136.html" target="_hplink">the magazine issue a correction</a>, starting a bit of a spat with the <em>Newsweek</em> columnist and historian. Krugman said of the cover story on his blog: "There are multiple errors and misrepresentations in Niall Ferguson's cover story in Newsweek -- I guess they don't do fact-checking." <a href="http://www.theatlantic.com/business/archive/2012/08/a-full-fact-check-of-niall-fergusons-very-bad-argument-against-obama/261306/" target="_hplink">The Atlantic's Matthew O'Brien did a full fact-check of Ferguson's piece</a>, which <a href="http://www.thedailybeast.com/articles/2012/08/21/niall-ferguson-defends-newsweek-cover-correct-this-bloggers.html" target="_hplink">Ferguson defended himself against</a>.
Estonian President Toomas Hendrik Ilves
Krugman argued that perhaps Estonia <a href="http://www.huffingtonpost.com/2012/06/06/estonia-krugman-toomas-hendrik-ilves_n_1575937.html" target="_hplink">shouldn't be held up as a model</a> for successful austerity measures in a 67-word blog post in June. The country's president Toomas Hendrik Ilves took to Twitter to slam Krugman, calling him "smug, overbearing & patronizing."
Andrew Ross Sorkin, "Squawk Box"
Krugman appeared on "Squawk Box" in July to discuss his book, but was upset to find out that they "never actually got there." Instead, <a href="http://www.huffingtonpost.com/2012/07/11/paul-krugman-cnbc_n_1664771.html" target="_hplink">Krugman wrote on his blog</a> that the appearance consisted of "one zombie idea after another -- Europe is collapsing because of big government, health care is terribly rationed in France, we can save lots of money by denying Medicare to billionaires, on and on," adding that people counting on the shows for sound information are getting "terrible advice."
Krugman hasn't been shy about criticizing Mitt Romney's plans for America's budget and economy, and he's taken the former CEO of Bain Capital to task for <a href="http://www.nytimes.com/2012/07/06/opinion/off-and-out-with-mitt-romney.html" target="_hplink">touting his business career</a>. In a column titled "Off and Out with Mitt Romney," Krugman wrote, "the truth is that even if Mr. Romney had been a classic captain of industry, a present-day Andrew Carnegie, his career wouldn't have prepared him to manage the economy."
Krugman has argued that the rich embrace Republican economic policies both because they want more money and simply because they're more inclined to buy into theories that justify their wealth. In a May <a href="http://www.huffingtonpost.com/2012/05/08/paul-krugman-rich-people-want-to-buy-praise-as-the-salvation-of-the-rest-of-us_n_1499679.html" target="_hplink">interview with Reuters</a>, Krugman said that rich people "want the world to praise them for their wealth, so they want economic theories that praise rich people as the salvation of the rest of us."
Krugman has been critical both of Wall Street's current practices and of the industry's ability to escape punishment for its role in the financial crisis. In a <a href="http://www.huffingtonpost.com/2012/02/17/paul-krugman-playboy-interview_n_1284417.html" target="_hplink">February interview with Playboy</a>, Krugman said "It's hard for me to believe there were no crimes. Given the scale of [the financial crisis], given how many corners were being cut, some people must have violated laws. I think people should be in jail."