(Bloomberg View) -- With response rates that have declined to under 10 percent, public opinion polls are increasingly unreliable.

Perhaps even more concerning, though, is that the same phenomenon is hindering surveys used for official government statistics, including the Current Population Survey, the Survey of Income and Program Participation and the American Community Survey. Those data are used for a wide array of economic statistics -- for example, the numbers you read in newspapers on unemployment, health insurance coverage, inflation and poverty.

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