Unemployment very tightly correlated to U3

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Surlethe
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Unemployment very tightly correlated to U3

Post by Surlethe »

So I ran some regressions with BLS data.

U1 = (0.76 ± 0.01)U3 − (2.31 ± 0.07)
U2 = (0.78 ± 0.01)U3 − (1.47 ± 0.05)
U4 = (1.066 ± 0.003)U3 − (0.09 ± 0.01)
U5 = (1.099 ± 0.005)U3 − (0.43 ± 0.03)
U6 = (1.70 ± 0.07)U3 − (0.3 ± 0.1)

over 1994-2010.

The coefficients are dependent on the structure of the labor force, which we all know has changed substantially since 1950. This is why

U1 = (0.518 ± 0.009)U3 − (1.34 ± 0.06)
U2 = (0.707 ± 0.007)U3 − (1.25 ± 0.05)

over 1948-2010 and 1967-2010, respectively. (More data points = tighter fit, but the coefficients are different because the labor force is changing. I suspect that the coefficients are very tight for any 10-20 year period, but they shift slowly over time. There have to be statistical ways of dealing with this.)

Okay, so the moral of the story? We can naively backward-compare previous recessions with this one as long as we don't take the numbers as too precise, to allow for the structural change (which we don't know). For example:

Peak of 1982 recession (Dec 1982):

Code: Select all

Actual          Predicted 
U1: 4.2         5.9
U2: 6.4         7.0
U3: 10.8       10.8
U4:              11.4
U5:              11.4
U6:              18.1
PS- I can pull a J and post big graphs if anybody wants :)
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Re: Unemployment very tightly correlated to U3

Post by General Zod »

Can someone translate this into English?
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Re: Unemployment very tightly correlated to U3

Post by Surlethe »

The different measures of unemployment are very tightly correlated with U3, so you can predict what they are if you know U3. The correlation is very strong for periods between 1 and 2 decades, but averaged over longer periods it becomes weaker because the structure of the labor force changes significantly over those longer periods of time.

The moral of the story is that you don't actually need U1-6 to compare past recessions to the 2007 recession, you just need U3 and some idea of how past U1-6 behaved as a function of U3.
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Re: Unemployment very tightly correlated to U3

Post by J »

General Zod wrote:Can someone translate this into English?
No, but I can provide you with a chart which illustrates this :P
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Re: Unemployment very tightly correlated to U3

Post by Lonestar »

Surlethe wrote:The different measures of unemployment are very tightly correlated with U3, so you can predict what they are if you know U3. The correlation is very strong for periods between 1 and 2 decades, but averaged over longer periods it becomes weaker because the structure of the labor force changes significantly over those longer periods of time.

The moral of the story is that you don't actually need U1-6 to compare past recessions to the 2007 recession, you just need U3 and some idea of how past U1-6 behaved as a function of U3.

Some of us were liberal arts majors.


What the fuck are you talking about? Use very small, Wikipedia style "Simple English" words.

U3 sounds like a radioactive isotope used in nukes *1960s graphs*
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Re: Unemployment very tightly correlated to U3

Post by J »

Lonestar wrote:Some of us were liberal arts majors.

What the fuck are you talking about? Use very small, Wikipedia style "Simple English" words.

U3 sounds like a radioactive isotope used in nukes *1960s graphs*
I is a liberal arts and I completely understand what he's saying. So here it is in smaller simpler words so those of you who weren't required to take math courses in your Lib Arts programs can follow along.

U3 is the the headline unemployment number, this is the one that's reported on CNN, MSNBC and all the other news outlets during the first week of each month. U1, U2, U4, U5, and U6 are alternate measures of unemployment found on Table A-15 of the BLS unemployment report, they basically take broader or narrower slices of the unemployment pie as compared to the U3 headline number.

What Surly-pooh has done is run a bunch of math to show that the other numbers move proportionally with U3 and do so with a fairly good fit over short to medium timespans, so if you know U3 you can plug it into the formula and come up with the rest of them. This lets you compare recent recessions to past recessions to see how bad things really were.

Surlethe wrote:Okay, so the moral of the story? We can naively backward-compare previous recessions with this one as long as we don't take the numbers as too precise, to allow for the structural change (which we don't know). For example:

Peak of 1982 recession (Dec 1982):
Naively would be right, because it assumes that the definitions for unemployment and the methodology used to calculate those numbers have remained constant. They have not.

http://www.harpers.org/archive/2008/05/0082023

Excerpts:
The story starts after the inauguration of John F. Kennedy in 1961, when high jobless numbers marred the image of Camelot-on-the-Potomac and the new administration appointed a committee to weigh changes. The result, implemented a few years later, was that out-of-work Americans who had stopped looking for jobs—even if this was because none could be found—were labeled “discouraged workers” and excluded from the ranks of the unemployed, where many, if not most, of them had been previously classified.
Also, on the unemployment front, as Austan Goolsbee pointed out in his New York Times op-ed, the Reagan Administration further trimmed the number by reclassifying members of the military as “employed” instead of outside the labor force.
The Clintonites also extended the Pollyanna Creep of the nation’s employment figures. Although expunged from the ranks of the unemployed, discouraged workers had nevertheless been counted in the larger workforce. But in 1994, the Bureau of Labor Statistics redefined the workforce to include only that small percentage of the discouraged who had been seeking work for less than a year. The longer-term discouraged—some 4 million U.S. adults—fell out of the main monthly tally. Some now call them the “hidden unemployed.” For its last four years, the Clinton Administration also thinned the monthly household economic sampling by one sixth, from 60,000 to 50,000, and a disproportionate number of the dropped households were in the inner cities; the reduced sample (and a new adjustment formula) is believed to have reduced black unemployment estimates and eased worsening poverty figures.
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Re: Unemployment very tightly correlated to U3

Post by Surlethe »

*sigh* Sorry, I got excited.*

The Bureau of Labor Statistics has several different measures of unemployment, termed U1 through U6, which are successively less restrictive in definition. The measure that the news always reports is U3.

Turns out that all of the measures are, in the short run, extremely tightly correlated to U3, so if we know U3 at any point in time, we can with high confidence predict U1-6.

The only trouble is that the correlation itself changes over time because the structure of the job market itself depends on demographics. So the further back in time you go, the less certain you become of the linear extrapolation of U* from U3 based on the data of the last 15 years.

*Serves you sorry-ass liberal-arts majors right :smugdog:
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Re: Unemployment very tightly correlated to U3

Post by Surlethe »

Hey, J, if the definitions of the measures themselves were changed, why aren't there structure changes in the data? I just glanced through the graphs, and I didn't notice any discontinuities where that article claims there are.
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Re: Unemployment very tightly correlated to U3

Post by J »

Surlethe wrote:Hey, J, if the definitions of the measures themselves were changed, why aren't there structure changes in the data? I just glanced through the graphs, and I didn't notice any discontinuities where that article claims there are.
That's a good question.
We know for a fact that the definition revision under Clinton happened (BLS Linky) yet as you noted there's no discontinuity in the dataset.
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Re: Unemployment very tightly correlated to U3

Post by Lonestar »

Surlethe wrote: *Serves you sorry-ass liberal-arts majors right :smugdog:
Don't get smarmy with me, I know of at least one engineer who has the opinion that "By relying entirely on acronyms with no comprehensible English meaning, it makes no pretense at being anything other than meaningless insider jargon."



:P
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Re: Unemployment very tightly correlated to U3

Post by Ritterin Sophia »

I think it's the fact that no one knows what the fuck a U3 is with no context...
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Re: Unemployment very tightly correlated to U3

Post by Phantasee »

I'm tempted to say "Bono + 1".

Surly, I think some graphs would help illustrate your point better.
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Re: Unemployment very tightly correlated to U3

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Phantasee wrote:
Surly, I think some graphs would help illustrate your point better.
Better call Shep.
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Re: Unemployment very tightly correlated to U3

Post by bobalot »

Lonestar wrote:
Phantasee wrote:
Surly, I think some graphs would help illustrate your point better.
Better call Shep.
God no, last thing this thread needs is graphs of military wank that nobody gives a shit about.

Seriously though, what exactly does all this U3 stuff mean today?
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Re: Unemployment very tightly correlated to U3

Post by Dominus Atheos »

bobalot wrote:Seriously though, what exactly does all this U3 stuff mean today?
It's a bullshit made-up number that the government likes to tell people is the "real" unemployment rate in the country. So when you hear on the news that the "unemployment rate" is at 9.6%, that's the U3 unemployment number. But that number includes a bunch of bullshit conditions for being included. A slightly better measurement is the U6 number which has less bullshit conditions.

So if you ask most people they will tell you that only 9.6% of people are unemployed, but that number only includes people who are actively looking for work. The U6 number, which includes people who aren't currently looking for work but have worked in past year, is 16%. The actual unemployment rate, which includes everybody who wants to have a job but currently does not, is 22%.

Actually even that's not the "real" unemployment rate since it doesn't count students, no matter how much they may want a job to help pay for school. Or people currently being a "stay-at-home parent" since homemakers aren't counted as part of the labor force.
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Re: Unemployment very tightly correlated to U3

Post by Phantasee »

Well since U6 is always going to be higher that means even during the good times we'd have higher unemployment if we went by U6. And if I get Surly's meaning, then U3 is close enough to U6 in reliability that it can be used ton compare over time. So since everyone uses U3 it makes comparing recessions easier.
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Re: Unemployment very tightly correlated to U3

Post by J »

Phantasee wrote:Surly, I think some graphs would help illustrate your point better.
How does a 1990's graph sound?

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Re: Unemployment very tightly correlated to U3

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J wrote: I is a liberal arts and I completely understand what he's saying. So here it is in smaller simpler words so those of you who weren't required to take math courses in your Lib Arts programs can follow along.
Yeah I'm an economics major and I needed a fucking legend, because for someone who doesn't know the meaning of U121347BBQ6145149OMG111 the comparison is uttery meaningless. Since it is, you know, an internal US procedure that not everybody needs to know about.

You might just as well write in Sanskrit and then act all smug that uneducated yokels can't understand you.
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Re: Unemployment very tightly correlated to U3

Post by Marcus Aurelius »

J wrote: I is a liberal arts and I completely understand what he's saying. So here it is in smaller simpler words so those of you who weren't required to take math courses in your Lib Arts programs can follow along.
Just a little nitpick here: I would be surprised if Liberal Arts majors would be required to take mathematics courses. However, at least in Europe, most are required to take at least some statistics courses, which is not exactly the same thing. In fact, at least in biosciences and in medical schools most people do not take mathematics but statistics.
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Re: Unemployment very tightly correlated to U3

Post by Fingolfin_Noldor »

I took my Physics degree in the US and I could have sworn there was no need to read on these jargon which eludes me.
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Re: Unemployment very tightly correlated to U3

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PeZook wrote:
J wrote: I is a liberal arts and I completely understand what he's saying. So here it is in smaller simpler words so those of you who weren't required to take math courses in your Lib Arts programs can follow along.
Yeah I'm an economics major and I needed a fucking legend, because for someone who doesn't know the meaning of U121347BBQ6145149OMG111 the comparison is uttery meaningless. Since it is, you know, an internal US procedure that not everybody needs to know about.

You might just as well write in Sanskrit and then act all smug that uneducated yokels can't understand you.

Of course some of us don't pretend to be an expert on economic matters that don't have anything to do with our fields. I don't get most economic jargon without some kind of actual reference because it's simply not important for what I'm majoring in.
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Re: Unemployment very tightly correlated to U3

Post by Phantasee »

Humanities students at the U of A need to take a math class or two and some stats classes as part of a degree requirement. Amusingly, sociology majors get credit for taking regular stats, and taking the sociology stats class (which is the same thing, except with more sociology related examples).
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Re: Unemployment very tightly correlated to U3

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Just to see how lazy the whingers are, I googled "unemployment U3" and the entire first page of results was devoted to explaining what the U3 is and how it relates or compares to the other measurements of unemployment in America.

If you're too fucking lazy to make one search engine query and read the first link, then maybe this thread just isn't for you.
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Re: Unemployment very tightly correlated to U3

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Terralthra wrote:Just to see how lazy the whingers are, I googled "unemployment U3" and the entire first page of results was devoted to explaining what the U3 is and how it relates or compares to the other measurements of unemployment in America.

If you're too fucking lazy to make one search engine query and read the first link, then maybe this thread just isn't for you.
If someone's too fucking lazy to provide some context for what they're talking about then maybe they shouldn't post the thread. But don't let me stop you from being a sanctimonious ass.
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Re: Unemployment very tightly correlated to U3

Post by Terralthra »

"Unemployment", "recession", "BLS", "U3," and other unemployment measures. All the context is right there. You don't want "context," you want it spoon-fed to you. Get the fuck over your entitlement.
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