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Cases of scientific malpractice in Brazil increased significantly between 2009 and 2012, according to a study looking at article retraction in scientific journals. The paper looked at retracted research articles in two major Latin American and Caribbean databases. Out of 2,000 articles from around the world published in the databases between 2009 and 2014, 31 were later pulled back, including 25 articles from Brazil. The study, published in Science and Engineering Ethics, says that this could threaten the country’s growing popularity as a research partner.

Twenty-one people have been arrested after US authorities set up a fake university to expose immigration fraud. Officials said the accused knew that the University of Northern New Jersey did not exist, but they were unaware it was a ruse run by immigration agents. The defendants acted as brokers for more than 1,000 foreigners who sought to maintain student and work visas, prosecutors said. Most foreign nationals involved in the scheme came from China and India.

The Department of Homeland Security arrested 21 people Tuesday on charges that they had recruited thousands of students through the promise of fraudulently obtained visas. At the center of the arrests was the University of Northern New Jersey, the brainchild of federal agents who masqueraded as representatives of a for-profit university to ensnare the recruiters.

The US government administration is creating a new office at the U.S. Department of Education dedicated to investigating and punishing illegal activity at colleges and providing debt relief to defrauded federal loan borrowers. Officials on Monday announced a new “enforcement unit” that will be charged with investigating misconduct at colleges, imposing administrative actions against colleges and resolving student loan debt relief claims linked to fraud. The administrative reshuffling will speed up and improve the quality of the department’s investigations of wrongdoing.

In October 2015, a New York district court ruled in favor of the academic publisher Elsevier, which had accused Sci-Hub, a website that offers pirated versions of academic papers, of copyright violation. That decision allowed authorities to take down the site’s domain name, sci-hub.org. Suspending a domain name does not delete a website forever, though, it just prevents visitors from knowing where exactly to find it. It’s trivial enough to relaunch the same site under another domain, as Sci-Hub did.

The Obama administration is highlighting growing concern over soaring United States student debt by forming a new enforcement unit to crack down on illegal behaviour by higher education institutions. The Department of Education said that it would create the unit, having taken action recently against several colleges for profiting illegally from students with deceptive marketing and inappropriate federal loans.

The University of Iowa suspects at least 30 Chinese students of having used ringers to take their exams. The case offers a look inside a thriving underground economy of cheating services aimed at the hundreds of thousands of Chinese kids applying to and attending foreign colleges. Coaching services author essays for clients. Handle their homework. Even take their exams. All for about a $1,000 a course.