Elizabeth Marquardt writes at FamilyScholars.org:

At the National Catholic Register reporter Steve Wetherbe has a solid story on how researchers are squelching the science, as the gay marriage debate makes scholars otherwise aware of the research on marriage, divorce and child well-being unwilling to say what they used to say.

Here's an excerpt of Wetherbe's article:

... Political correctness is involved too in the suppression of findings.

[David Blankenhorn, head of the Institute for American Values] tells of being lambasted by the head of one family research organization back in the mid-2000s for using one of that organization’s studies to support an article he wrote for the Los Angeles Times against same-sex “marriage.”

“She didn’t claim I’d used the data wrongly. She just didn’t want her research associated in any way with being anti-same sex ‘marriage.’ She actually tried to forbid me from ever doing it again.” Blankenhorn says he used “blunt language” to stand up for his right to use the data as he chose.

Diane Sollee, founder and director of Smart Marriages, a national coalition of marriage and family educators, says traditional, biological marriage is too important and beneficial for social scientists to soft-pedal.

“Society is telling people a lie: that if you married a jerk then you’ll be better off and your children will be better off if you dump him. ‘It’s not your fault: You just married the wrong person.’

“But what people need to hear is what research really shows: that your children will be much better off — much better off, according to every measure researchers can think of — if you can hang in there with the father of these children and make it work.”

For those who can “hang in there,” it gets even better: “Longevity studies show the mother will live longer, the father will live longer, and the children will live longer. They also show that the majority of couples who reported being deeply unhappy in their marriage and for whatever reason stayed in the marriage, in five years reported being happy, and many couldn’t even remember being unhappy.