Comparisons between ‘the national weather’ and ‘the national economy’ are not quite revealing enough, because ‘the national economy’ is much more complex. Which emphasizes my point.
What is ‘the temperature’ in the US right now? Too hot, or too cold? Let’s let the folks in Alaska and Florida duke that one out.
And yet, we have predictive weather models. We can calibrate them. (For economists, ‘calibrate’ means, compare your predictive model with groundtruth to ascertain the validity of your predictive model.) We can apply data to our weather models, predict outcomes by applying the models, and then compare the model predictions with reality. And, state of the art is maybe 10 days, tops, with stated and verifiable and growin uncertainties the farther out we try and predict these relatively simple complex systems objectively governed by physics.
So sure, what is ‘the’ fed interest rate that will best tweak in ‘the’ economy? What is ‘the’ size of ‘the’ stimulus package that will best manage ‘the’ economy? Let’s brush aside 50 sets of more stringent state banking and lending laws in court case after court case and even USSC case, and replace them with our OneSizeFitsAll, AllOurEgsInOneBasket federal FNMA experiment, see what happens. At least when human constructivist hubris from the last century built it’s occasional unsinkable Titanic, the only folks who paid were the unfortunate victims of the hubris, not every citizen in the nation.
When it comes to state of the art in economics, state of the art can’t even reach consensus and reliably tell anybody on earth what just happened, much less, what is going to happen, or God forbid why, when it comes to ‘The Economy.’ And yet, you can tool into Cargo Cult Science societies like the Princeton Department of Political Economics, and find (never calibrated, ever) mathematical looking models, dutifully using some of the very same lexicons and symbology to be found in the adjacent Math or Physics Departments. You can read paper after paper, and check the math, and never once see any of this Cargo Cult science applied to actual reality, as a calibration. Why bother, when the mission is purely political? Lab coats? Check. Computers? Check. Excel Spreadsheets? Check. Got the correct look and feel of actual ‘science’, but let’s stop short of actual ‘science’, because after all, we’ve given ourselves a bye with that ‘soft science’ disclaimer, as in, not really science at all.
We’ve got terrabytes of historical weather data. Feel free to calibrate your latest crazy weather model, there is a new experiment run every day.
Ditto the latest economic model, but … don’t hold your breath. Instead, go see economic science in action, and read about the LTCM post mortem. When the model gets too tough to map onto reality, state of the art in economic predictive science just … neglects the terms. What you end up with is something that, if it were a weather model, would be able to predict that the weather in San Diego tomorrow is likely going to be sunny and warm, and works perfectly for as long as the weather tomorrow in San Diego is sunny and warm.
But, when it comes to modern political economic debate, we’re not even talking about Cargo Cult scientific economic models, complete with nonlinear partial derivatives and so on. We’re talking full blown voodoo priests simply dancing at the base of today’s volcano, ‘doing something’, promising a good harvest if we give tribal power to them. If next years harvest is good, we credit the voodoo priests. If not, they blame the purity of last years sacrifice.
And, the tribe still buys it. Totally uncalibrated, except in the lucky rabbits foot school of modern calibration.
So, back to talking about “The Economy.” It’s riveting stuff. Riveting, uncalibrated stuff that can’t even tell us what just happend, much less, what is going to happen.
I just wonder where it is mostly used. Is it used by folks who stare at the scoreboard and bet on the game, or is it used by folks with actual skin in the game? Carcass carvers, or beast builders? Or purely by the political parasites, living on the beast?
It reminds me a little of those crib sheets you can buy outside of racetracks, picking the winners in each race. Except, of course, that even those are at least daily calibrated with ground truth.
regards,
Fred