Stop Lying to Students
If you are out to describe the truth, leave elegance to the tailor. (On being reproached that his gravitation formula was longer and more cumbersome than Newton’s.)
Albert Einstein
So, I’ve combed through all the big sellers used as economics textbooks and discovered that they all agree that we should portray Demand the way they show it in Figure A. It has remained unchanged since Alfred Marshall wrote Principles of Economics in 1890.
The jury is in. The verdict read. Everyone agrees! It’s so simple! So self-evident! So elegant!
And yet, so wrong.
You’d think a world deep in the middle of its Information Age would want its Demand Curves to be informed with data. Figure (A) is not so drawn. If it were only the case that the convention in (A) was a harmless yet broadly accepted lie, I might be inclined to let it go.
But it isn’t. Students are being led astray. Markets aren’t that straightforward.
To analyze them, you need to do more work.
Figure (B) shows what happens when we do that work. Here, we examine the leading currencies of the day and make several mathematically informed discoveries about currency Demand. There is not a simple single line describing it. In (B), we see four different curves at play. There are others still, but we won’t entertain them now.
The Upper Demand Frontier was formed by the currencies of three Gulf states, plus the Euro, the British Pound, and the United States Dollar. This boundary describes the Price-Limited market boundary.
THE OUTER DEMAND FRONTIER reveals the market’s saturation limits. Adding more units to a given currency tends to depress its Value (sustainable price in United States Dollar equivalents) along this curve.
THE INNER DEMAND FRONTIER exposes the minimum viable quantities of currencies given their prices. In essence, the world says that if you issue a currency, you are guaranteed at least its Value along this line.
THE JAPANESE YEN DEMAND CURVE (yes, there is one for every country shown; we’re only looking at this one for an example) shows how the price of that country’s currency should rise or fall as the number of units enters or disappears from the market. We obtain the slope of that curve when we solve for the Value of all currencies, which is a function of each country’s
1) Prime rate,
2) Foreign Exchange Reserves, and
3) Currency volume.
Yes, this method is “longer and more cumbersome” than the simple line it replaces. Relativity is more complex than Newtonian mechanics. But, without relativity, you don’t get a Global Positioning System (GPS). And who wants to navigate without that?
Navigating markets takes hard work that others don’t yet imagine they have to do. But market math reveals its truths once we make that effort.
We need students to understand the real world of markets, not some oversimplified paradigm that leaves them partially informed yet confident they know how they work.
#hypernomics #markets #marketanalysis