What's in a number?
Taming Volatile Raw Data for Jobs Reports
The unemployment rate fell to 7.8 percent in September, its lowest level since President Obama took office. With just a month to go before the election, the news seemed too good to be true, at least for some Mitt Romney supporters.
Almost immediately some conservative pundits began accusing the Labor Department, which released the jobs numbers on Friday, of cooking the books. After all, the household survey — the survey that the unemployment rate comes from — showed that the number of people with jobs rose 873,000 in September, though the gain had averaged 164,000 each month earlier this year.
These numbers are always tremendously volatile, but the reasons are statistical, not political. The numbers come from a tiny survey with a margin of error of 400,000. Every month there are wild swings, and no one takes them at face value. The swings usually attract less attention, though, because the political stakes are usually lower.
The numbers, by the way, are especially imprecise (and prone to revision) when the economy is making a turn, or when regular seasonal patterns start to change. And there is reason to believe that one particular seasonal pattern — the start of the college school year — may be partly responsible for the big swing in September.
(More here.)
By CATHERINE RAMPELL
7:32 p.m. | Updated
7:32 p.m. | Updated
Look how noisy these numbers are, and always have been!
Dollars to doughnuts
The unemployment rate fell to 7.8 percent in September, its lowest level since President Obama took office. With just a month to go before the election, the news seemed too good to be true, at least for some Mitt Romney supporters.
Almost immediately some conservative pundits began accusing the Labor Department, which released the jobs numbers on Friday, of cooking the books. After all, the household survey — the survey that the unemployment rate comes from — showed that the number of people with jobs rose 873,000 in September, though the gain had averaged 164,000 each month earlier this year.
These numbers are always tremendously volatile, but the reasons are statistical, not political. The numbers come from a tiny survey with a margin of error of 400,000. Every month there are wild swings, and no one takes them at face value. The swings usually attract less attention, though, because the political stakes are usually lower.
The numbers, by the way, are especially imprecise (and prone to revision) when the economy is making a turn, or when regular seasonal patterns start to change. And there is reason to believe that one particular seasonal pattern — the start of the college school year — may be partly responsible for the big swing in September.
(More here.)
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