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Wage growth flows to top 1 percent: Study

President Barack Obama speaks at a Costco in Maryland on Jan. 29, 2014, to highlight the importance of raising the federal minimum wage.
Jewel Samad | AFP | Getty Images
President Barack Obama speaks at a Costco in Maryland on Jan. 29, 2014, to highlight the importance of raising the federal minimum wage.

There's little debate that wages for the average American household have stalled and wealth is flowing more heavily to the top of the income ladder.

There's less consensus about why—and what should be done about it.

A new study analyzing more than three decades of wage data argues that government polices—more than globalization, new technologies or gaps in education or training—go a long way to explaining the expanding wealth gap in America.

"There's a lot of uncertainty about the rise in inequality, but we've changed a lot of government policies over the last generation that have pretty predictable effects on wages," said co-author Josh Bivens, policy director at the Economic Policy Institute, a Washington think tank devoted to helping low and middle income households.

Read MoreLow-wage jobs crowding out fatter paychecks

Those policies have become a key focus of the Obama administration, which is proposing an increase in the federal minimum wage—to $10.10 an hour from the current $7.25—as part of a broader agenda of boosting pay checks for lower and middle-income households.

The new paper, being unveiled Wednesday at an event featuring Labor Secretary Thomas Perez, is the opening salvo in an EPI research campaign to focus on wage inequality.

At the root of the debate is a question economists have sought to explain for decades: the abrupt disconnect in the late 1970s between the overall productivity of the U.S. economy and wage gains for the average worker.

From 1948 to 1979, both hourly wages and productivity roughly doubled. But from 1979 to 2013, productivity rose 65 percent while average hourly compensation rose just 8 percent, according to the EPI.

And those at the bottom and middle of the income ladder saw little of those gains, according to the analysis, because most wage growth has flowed to the top 1 percent of earners.

Numerous economic papers have tried to explain why wage gains further down the ladder have stalled. Many blame the rapid rise in globalization, which allowed American companies to move operations to countries where labor is cheaper. Others cite the rise of technologyfrom factory floor robots to smartphonesthat have allowed employers to squeeze more work out of the same number of workers.

The authors of the paper argue that wage growth for the average household has been thwarted more by changes in government policies than by global forces like technology.

Software engineers, for example, while well paid compared to lower-wage workers, have seen relatively slow wage growth compared to the overall gains in productivity—even as demand for their services has expanded, said Bivens.

"We think there's much less scope for technology to explain these trends," he said. "But that's why we think people have given short shrift to the impact of policy changes."

Among those is the failure to update the federal minimum wage to keep up with inflation. In real terms, the spending power of a federal minimum wage has fallen to levels last seen in the 1960s.

Read MoreSeattle council passes $15 minimum wage

But the authors also cite Federal Reserve policies that have favored low inflation over high employment and easing regulations governing overtime and the use of contract workers.

By CNBC's John Schoen.

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