Home » Posts tagged 'econometrics'

Tag Archives: econometrics

Olduvai
Click on image to purchase

Olduvai III: Catacylsm
Click on image to purchase

Post categories

Post Archives by Category

Rationalizing ‘Rational’

Walter W. Heller was said to have been an “educator of Presidents.” As an economist and Presidential advisor in the inner circles of DC, Heller worked with more candidates and officeholders than perhaps any other man. As he himself described, his influence went all the way back to Adlai Stevenson and kept on through Kennedy, Johnson, Carter, and Mondale. To his mind, he takes credit for turning Presidents into thorough Keynesians starting with JFK in January 1963 and the tax cut “stimulus” that Heller claims was “born on my desk.”

As an economist and advisor, Heller seems to have spent a lot of time about the 1960’s and almost none describing the 1970’s. Perhaps his greatest contribution to that decade was a quote attributed to him describing economics. “An economist is a man who, when he finds something works in practice, wonders if it works in theory.”

Among the most pernicious of these theories to have been backward applied in exactly that manner is “rational” expectations theory. This was developed in the 1980’s to try to explain the disaster of the 1970’s in terms that would save econometrics. Thus, it is applied in great detail and mathematics to “inflation” and is often discussed only in that context. Among the most influential to have used rational expectations theory was John Taylor as the basis for the Taylor “rule.”

In a 2007 speech, then-Federal Reserve Chairman Ben Bernanke described the updated expectations framework as it at that time related to inflation and gradualism in monetary policy (into the onrushing storm).

…click on the above link to read the rest of the article…

Mises.org: Keynes’s Critique of Econometrics is Surprisingly Good

In a recent article we had a brief look at Ragnar Frisch’s (1895–1973) vision of econometric model building. As mentioned, Frisch was the first economist chosen over Mises to win the Nobel Prize in 1969. In fact, there was a second one in the same year. Frisch won the prize jointly with Dutchman Jan Tinbergen (1903–1994), who applied Frischian econometrics for the first time in large-scale macro models by the end of the 1930s.

In the first volume of his investigations into business cycles commissioned by the League of Nations, entitled Statistical Testing of Business Cycle Theories, published in 1939, Tinbergen exonerates the statistician and econometrician from his responsibility and explains:

The part which the statistician can play in this process of analysis must not be misunderstood. The theories which he submits to examination are handed over to him by the economist, and with the economist the responsibility for them must remain; for no statistical test can prove a theory to be correct.

While classical and Austrian economists would agree that an economic theory cannot be proven correct empirically, they would not as easily let the statistician off the hook. Indeed, the econometrician and statistician have some responsibility for the economic theories that come to be accepted, especially if one holds, as Tinbergen does, that those theories can be proven “incorrect, or at least incomplete, by showing that it does not cover a particular set of facts.”

This is an odd claim, since practically any theory is incomplete, but this does not mean that it is incorrect. Obviously there remains a twofold danger: A wrong theory might not be proven wrong, although it could be done in principle, and a true theory might be “proven wrong” mistakenly, because it is incomplete as it does not account for some particular set of facts. The econometrician would of course be responsible for these errors.

…click on the above link to read the rest of the article…

Are Austrian Criticisms of Mainstream Economics Still Relevant?

Are Austrian Criticisms of Mainstream Economics Still Relevant?

Occasionally, when Austrians try to distinguish their brand of doing economics from the mainstream, they get hit with accusations that they are attacking straw men; that no one believes what Austrians claim is the mainstream approach.

Is this true? Are Austrians attacking enemies that don’t exist anymore? I say no. While it might be true that many of the top economists may in general agree with broad Austrian methodological conclusions, the typical economist is much more likely to either (a) explicitly deny the Austrian criticisms, or (b) implicitly or casually invoke these fallacies during their analyses for reasons I shall explain below. Let’s look at the evidence.

Econometrics

The position often attributed to Austrians regarding econometrics is that Austrians reject the field completely. But this is not true. Austrians criticize econometrics only when it is either (1) trying to prove or disprove (or “falsify”) pure economic theory, (2) trying to establish universal magnitudes between economic phenomena, or (3) trying to forecast economic data. To Austrians, econometrics is only useful as a tool of history: it can tell us quantitative information about a specific period in the past, and that’s it. Econometric findings are not generalizable to all of the past, and cannot be projected to precisely predict the future.

The second case was one of the principle ambitions of the first econometricians. In Human Action, Mises refers to the University of Chicago economist Henry Schultz. Schultz (a founding member of the Econometric Society) had tried to determine “the” price elasticities of demand for a whole bunch of goods. In other words, he wanted to find out exactly how much the how many more potatoes would be sold if their price per kilogram went up $1. Mises correctly demonstrated why this whole endeavour was doomed to failure: all prices are historical, and are subject to change at any time. There are no constants in economics.

…click on the above link to read the rest of the article…

 

Manipulating the Consumer Price Index: Hedonic Quality Adjustments | The Consumer Price Illusion

Manipulating the Consumer Price Index: Hedonic Quality Adjustments | The Consumer Price Illusion.

Have you heard the one about CPI?

Suppose that a TV manufacturer retires a product and replaces it with a newer, better, and much more expensive one. If the new TV costs 5 times more than the old one, how can we manipulate the hell out of massage the price of the old TV to make it look like the price fell? By using the dark arts of econometrics, my son!

If you believe the public comments made by the world’s central bankers, the prices that consumers pay for items are not rising fast enough; in some places like Europe they worry that prices might actually fall (a tragedy for the possessing classes, as their manic one-way long bets might not work then).Central bankers are terrified of this outcome. Setting aside for a second the apparent insanity of this logic for your average consumer, who experiences price rises on a near continuous basis, let’s examine in detail one of the jokes gauges economists use for measuring prices: the Consumer Price Index (CPI).

Ostensibly, the CPI is a linear combination of the “prices” of things/stuff consumers could actually purchase weighted by a percentage that the “ideal consumer” spends on any particular stuff/thing in his “ideal” basket. The main problem here is that the “prices” used are not the prices a consumer would actually pay; instead the real price for an item is scaled by what the BLS calls a “Hedonic Quality Adjustment (HQA)”. The HQA was designed to solve a real world problem economists face: the market keeps pumping out new and better devices. In practice the HQA is used to artificially depress the prices used in the calculation of the CPI.

…click on the above link to read the rest of the article…

Olduvai IV: Courage
Click on image to read excerpts

Olduvai II: Exodus
Click on image to purchase

Click on image to purchase @ FriesenPress