Archive for the ‘economics’ Category
Retractions have arrived in the case of Peter Nijkamp, a leading Dutch economist accused of duplication and plagiarism. The Review of Economic Analysis has removed two of Nijkamp’s articles for self-plagiarism.
According to the NRC Handelsblad website (courtesy of Google translate):
The affair university economics professor Peter Nijkamp and his PhD student Karima Kourtit has escalated. The editors of the journal Review of Economic Analysis (RoEA) appears to have withdrawn because of self-plagiarism two scientific articles (reuse your own work earlier without acknowledgment), NRC Handelsblad discovered last week at the RoEA website.
The website reports that “significant parts” of the reclusive articles have appeared in other publications Nijkamp and Nijkamp / Kourtit, “without reference orderly” earlier. It involves work Nijkamp alone and work of VU economist Frank Bruinsma with Nijkamp and Kourtit.
We haven’t covered that many retractions in economics, and a 2012 paper found very few such retractions. Now, a new study based on a survey of economists tries to get a handle on how often economists commit scientific misconduct.
The author of a controversial 2009 paper arguing that at least some amount of global warming could lead to economic gains has corrected the paper, along with a later article in a different journal. We confess to be baffled by the implications of the mix-up, although others appear to be less confused.
The 2009 article, “The Economic Effects of Climate Change,” was written by Richard Tol, of the University of Sussex, and appeared in the Journal of Economic Perspectives. It has been cited 91 times, according to Thomson Scientific’s Web of Science.
Here’s the abstract:
The Nordic Journal of Migration Research has retracted a 2012 paper by a Swedish researcher who lifted text from another author.
The article, “Swedish Employers and Trade Unions, Varieties of Capitalism and Labour Migration Policies,” was written by Jesper Johansson, of Linnaeus University in Växjö. It’s available as a PDF here, but not on the website of the publisher, De Gruyter — nor is it listed on Johnansson’s own site.
We chose a sentence a random from the abstract:
The Dutch papers are reporting that Peter Nijkamp, one of the leading economists in The Netherlands, has been embroiled in what looks like a self-plagiarism scandal following the cancellation of a thesis defense by one of his graduate students because of plagiarism.
We say “what looks like” because it’s tough to figure out what’s alleged here, given our reliance on translations. Best we can tell, the allegations against his graduate student are for plagiarism, while those against Nijkamp are for duplication, a.k.a. self-plagiarism.
The other day, we wrote about two retractions in the Journal of the American College of Cardiology, and another in the American Heart Journal, stemming from database errors.
Seems to be catching.
The Economist (among other outlets) this week is reporting about a similar
nother database glitch — not, we’ll admit, a retraction — involving a landmark 2010 paper by a pair of highly influential economists. The controversial article, “Growth in a Time of Debt,” by Harvard scholars Carmen Reinhart and Kenneth Rogoff, argued that countries that took on debt in excess of 90% of their gross domestic product suffered sharp drops in economic growth. That evidence became grist for the austerity mill, including Paul Ryan.
Turns out, that conclusion was based to some extent on an Excel error. Read the rest of this entry »
Markets undergo flash crashes — when stocks or bonds rapidly nosedive in value and then just as rapidly recover — every day. On May 6, 2010, for example, the entire equity market flamed out and then nearly recovered its value all in the matter of hours.
“[A]ll of Section 3 is wrong until proven otherwise”: Correction of paper on Democrats’ economic policy
Andrew Gelman, a statistician at Columbia University and a friend of the blog, has corrected a 2008 paper in the blunt way you’d expect him to.
Here’s the notice in the Annals of Applied Statistics:
In the paper, “Should the Democrats move to the left on economic policy?” AOAS 2 (2), 536-549 (2008), by Andrew Gelman and Cexun Jeffrey Cai, because of a data coding error on one of the variables, all our analysis of social issues is incorrect. Thus, arguably, all of Section 3 is wrong until proven otherwise. We thank Yang Yang Hu for discovering this error and demonstrating its importance.