 What is one reason the author thinks the regression analysis used by Murray and Herrstein was inadequate?
The Bell Curve Flattened Charles Murray is a publicity genius, and the publication of his and Richard Herrnstein's book, The Bell Curve: Intelligence and Class Structure in American Life , in the fall of 1994 was his masterpiece. Herrnstein and Murray didn't do this, so it wasn't until a full year or more after The Bell Curve was published that the leading experts on its subject had a chance to go through the underlying data with care. Herrnstein and Murray begin by telling us that the liberal position on IQ--namely, "Intelligence is a bankrupt concept"--has been discredited, and that "a scholarly consensus has been reached" around their position. The notion that IQ tests are completely useless never prevailed in liberal academia to nearly the extent that Herrnstein and Murray say.
 The tests relied upon in the database were not truly IQ tests.
 The results were able to be duplicated by other social scientists.  The independent and dependent variables were clearly defined.  The tests relied upon in the database were not truly IQ tests.  The sources relied upon were balanced and reliable.