A recent study by economists Katharine Abraham and John Haltiwanger at the University of Maryland, Kristin Sandusky at the Census Bureau and James Spletzer at the Labor Department found “substantial discrepancies” between employee payrolls and the household survey used to calculate Unemployment.
Some 6.4% of people who showed up as holding jobs on employee records were recorded as unemployed in the household survey. Many of them were 65 and older — which suggests they were people who considered themselves retirees even as they continued to draw some sort of paycheck. An even larger 17.6% of people who counted as employed in the household survey didn’t show up on employee records. Many of them had demographic characteristics, such as low education levels, that suggested they were working off the books.
via Did Economy Really Create 500,000 Jobs? – Real Time Economics – WSJ.