From the linked article:

"Gius is also the author of several other studies, including “The Effects of Interracial Marriage on Individual-Level Earnings,” in which he concludes that “persons in interracial marriages earn as much or more than persons in white marriages. The only interracial marriages that do worse than white marriages are those marriages that include an African-American male.”

One clue that Gius might not be such a straight shooter, ideologically speaking, is evident in his “The Impact of Ultrasound Laws on the Demand for Abortions by Young Women,” which naturally concludes that forced ultrasound laws “reduce the odds of a woman having an abortion quite substantially.”

In his conclusion, though, Gius slips up a little further (emphasis mine):

The primary motivation for the present study was to determine if the anecdotal evidence on ultrasound laws was true: did giving women the opportunity to view their unborn fetus reduce the probability that they would have an abortion? Most pro-life groups believe that is the case. Most pro-choice groups also believe it to be true, although they believe that these laws are unconstitutional. Results of the present study suggest, however, that both groups are correct; ultrasound requirement laws reduce the odds of a woman having an abortion quite substantially."

The Koch Brothers, ALEC, the NRA, and the Tea Party all support these bogus "studies" and the bigotry behind them in order to promote racism, misogamy, and gun violence on the streets for profit.