WASHINGTON – Hundreds of millions of dollars in U.S. government spending to promote healthy marriages seems to have had little effect on marriage and divorce trends, a new study has found.

The federal government will have spent roughly $800 million on its Healthy Marriage Initiative by the end of the federal fiscal year, according to the federal Administration for Children and Families. The money, drawn from the welfare budget, has funded a range of programs to help couples have better relationships.

But the initiative does not seem to have changed state marriage or divorce rates. Between 2000 and 2010, marriage rates continued to dwindle as the federal money poured into local programs, according to new research from the National Center for Family and Marriage Research at Bowling Green State University.

Divorce fell in some states and rose in others, but the patterns were little different in states that spent a lot on the Healthy Marriage Initiative – such as Oklahoma, Arkansas and Wyoming – and states such as Rhode Island, West Virginia and Nevada that spent little.

Washington, D.C., is an apparent exception: The district spent more per person on healthy marriages than any of the states and saw its marriage rate rise 35 percent between 2000 and 2010. But with little evidence of a broader tie between marriage rates and such spending, researchers chalked up that increase to its rapidly changing demographics.

All in all, “there’s no bump up or down in these figures,” National Center for Family and Marriage Research co-director Susan L. Brown said. “That does call into question: What are the measurable benefits?”

The study examined more than $600 million in federal funding spent between 2000 and 2010, including early demonstration projects.

A decade ago, then-Assistant Secretary for Children and Families Wade F. Horn told a Senate committee that teaching relationship skills could “increase the odds that couples will form and sustain healthy marriages.”

Children raised in “healthy married households” were less likely to endure poverty or commit crimes, Horn said.

The new research adds to a long-standing debate over whether government can or should promote better marriages as a way to combat poverty.

Some supporters argue that marriage rates are an inadequate measure because the goal is not to increase weddings but to improve existing relationships so that children are better off.