US policy relies on wrong productivity measures

Tonelson and Kearns in the NYT address the argument that deregulation and free trade drive innovation, which drives labor productivity up, and lead to wage gains. The problem is that the wage gains have not kept up with productivity gains since the 1980s. This is attributed to workers not keeping their skills up-to-date. But there is another possibility, that the productivity measure is flawed.

But what if wages lag because productivity itself is being grossly overstated, especially in the nation’s manufacturing sector? Then, suddenly, a cornerstone of American economic policy would begin to crumble.

Productivity measures how many worker hours are needed for a given unit of output during a given time period; when hours fall relative to output, labor productivity increases. In 2009, the data show, Americans needed 40 percent fewer hours to produce the same unit of output as in 1980.

But there’s a problem: labor productivity figures, which are calculated by the Labor Department, count only worker hours in America, even though American-owned factories and labs have been steadily transplanted overseas, and foreign workers have contributed significantly to the final products counted in productivity measures.

The result is an apparent drop in the number of worker hours required to produce goods — and thus increased productivity. But actually, the total number of worker hours does not necessarily change.

This oversight is no secret: as Labor Department officials acknowledged at a 2004 conference, their statistical methods deem any reduction in the work that goes into creating a specific unit of output, whatever the cause, to be a productivity gain.

This continuing mismeasurement leads economists and all those who rely on them to assume that recorded productivity gains always signify greater efficiency, rather than simple offshoring-generated cost cuts — leaving the rest of us scratching our heads over stagnating wages.

And if that is the case:

Above all, if offshoring has been driving much of our supposed productivity gains, then the case for complete free trade begins to erode. If often such policies simply increase corporate profits at the expense of American workers, with no gains in true productivity, then they don’t necessarily strengthen the national economy.