One anesthesiologist prepared the study drug (DMT) in a preparation room.
The article also misstated the name of the nonprofit group that prepared the study.
Dwight Morris, who prepared the study on which the article was based, says on The American Prospect's blog that "there is no statistically valid way to calculate this number given the way the data were compiled".
The consultants who prepared the study talked to neighbors, checked zoning codes, documented previous violations and stopped by on weekends to listen to the thumping music and witness the revelry.
The Boston Consulting Group, which prepared the study, said that the industry's economic value had been underestimated because earlier figures were based solely on permits and did not include pre- and post-production.
"I think that the public will be surprised that almost half of all children will be likely to experience this type of household," said Pamela J. Smock, the sociologist who prepared the study.
Hyperlinks are a huge and welcome convenience, of course, said Jonathan Zittrain, who teaches law and computer science at Harvard and who prepared the study with Kendra Albert, a law student there.
The study, which examined 115 multibillion-dollar mergers around the world in a variety of industries from 1993 to 1996, found that 58percentt failed to produce any extra benefit for shareholders when compared with the performance of the companies' peers in the same industry, said Michael R. Traem, the A. T. Kearney vice president who prepared the study.
The Trovan experiment, a company spokeswoman said, was approved by a Nigerian ethics board and "was sound from medical, scientific, regulatory and ethical standpoints". Pfizer researchers prepared the study over six weeks, instead of the year or longer common in the United States.
"Just blaming the patients or saying 'it's destiny' or 'we can't do any better' is a premature conclusion and is likely to be wrong," said Dr. Harlan Krumholz, director of the Center for Outcomes Research and Evaluation at Yale-New Haven Hospital, which prepared the study for Medicare.
