Stop “employing” unemployment

Economists waste too much time “employing” the unemployment rate concept.

Oh boy..

The unemployment rate.

Do we really have to go all over this again?

Why are people continuing discussing about Full Employment? The natural rate of unemployment? NAIRU?!!?

Economists sound like those annoying children yelling during the trip (the economic recovery):

– Are we there yet? Are we there yet?

No. We are not.

Forget about the theory that says if the unemployment rate is below the “natural rate” we must have inflation. It´s not incorrect, it’s only half true. The NAIRU story is incomplete.

The NAIRU story states that if inflation isn’t rapidly increasing, the unemployment rate must be above the natural unemployment rate.

However, I believe the United States most probably has the unemployment rate below its “natural” ratio, the one that pushes wages up. When workers increase their bargaining power. Yes, the Phillips curve story, Marx’s reservation army, …

Just look at the data, we are seeing one of the lowest unemployment rates recorded (since the hippies).

United States Unemployment Rate

But…that does not mean, we are already there.

Just look at the data, the US has suffered a big decrease in employment since the Crisis and its still a great deal behind the curve.

United States Employment Rate

The Labor Force Participation is still recovering.

United States Labor Force Participation Rate

Of course, some part of the decrease in participation is due to demographics…

But, in my opinion, we must probably watch this sequence of events in the proceeding recovery, a convergence to the natural rate of unemployment combined with low inflation from (drums…) BELOW:

  1. As the economy expands and the unemployment rate contracts, more people that were out of the Labor Force will return as they perceive an increase in the demand for labor
  2. The rise in the participation rate will lead mathematically to an increase in unemployment and/or employment
  3. As long as the ratio of the increase in unemployment to the increase in participation is lower than the official unemployment rate, the Unemployment rate will continue to decrease (just do the math)
  4. But eventually it will come a time when the increase in participation will not totally be reflected in new employment and the inflection time will initiate
  5. The unemployment rate will start to increase (but the employment rate is also increasing (remember?), as the participation rate is increasing)
  6. Eventually we will reach a ratio of employment which will cause pressure on wages
  7. We will start to see the “white in the eyes” of inflation
  8. Finally the Federal Reserve will definitively remove the “punch bowl” by pursuing a contractionary policy
  9. Will we have a recession next?
  10. Are we there yet?

The lazy theory of Monetary Disequilibrium    

Don’t worry, I am not going to “Yeager” you a long lesson on Monetary Disequilibrium Theory.

Just a quick one.

Laziness reigns supreme in a monetary world. Laziness is the “ugly” counterpart of specialization.

You don’t just specialize in the things you like (or have an advantage). You also de-specialize in things you don’t (or that you are too lazy to perform).

Therefore laziness allows specialization. It allows innovations. It allows productivity. It allows the Wealth of Nations.

Let’s imagine now, we live in a world of Monetary Disequilibrium.

There is an excess of Money Demand or an excess of Money Supply.

If there is excessive money demand, by definition there will be a lack of aggregate demand for output. We will have a general depression. We shall have unemployment all around.

If there is excessive money supply, by definition there will be an excessive aggregate demand for output. We will have an (unsustainable) expansion. We shall have inflation all around.

Unemployment and Inflation are not bad things per se (despite what your casual economist would say).

Unemployment in a sector of activity may be a sign of a shift in consumer preferences.

Inflation in a sector of activity may be a sign of scarcity of the “good” exchanged.

They symbolize what the “market” wants and what the “world” provides.

But if we experience General Unemployment (excessive demand of money), we as workers will spend too much time trying to find a Job. Time we could, should and would be producing whatever the market demanded.

But if we experience a General Inflation (excessive supply of money), we as consumers will spend too much time trying to find a Reserve of Value (to “protect” us from inflation). Time we could, should and would be producing whatever the market demanded.

We shouldn’t be forced to desperately look for Jobs and Reserves of Value.

We should specialize in supplying whatever the market demands (and we are good at) and demanding whatever our distorted minds may want.

Don’t force us to do extra, unproductive work.

Give us Monetary Equilibrium.

Comparative Advantage and Socialism

If you are a free market advocate, if you are opposed to excessive Government or you just are a Punk Anarchist which doesn’t support any form of authority, you must knowingly or unknowingly worship Adam Smith, and let’s Say… David Ricardo.

Anyone that studied International Economics, knows that each country must specialize in something.

Adam Smith said: Do what you do better!

But Ricardo replied: Even though you may the Best in some deed, maybe there’s some other quest you must pursue

After that, the Invisible Hand would do its magic and through international trade, Earth’s welfare would increase.

Let’s now narrow our vision, let’s focus on intranational trade, our everyday lives.

Just a simple example.

In country A, there are two professions: Fisher and Builder.

Let’s say John is a “10” fisher, but a “8” builder.

Adam is a “8” fisher, but only a “3” builder.

Both wannabe employees, Adam and John will first apply to be a Fisher, because they know they are good at it, so they may end up earning a higher wage.

And the captain of the ship, will obviously choose John, which is the better Fisher.

Therefore sadly, Adam will end up being a lousy builder.

So…the free market society, through its invisible hand will end up with total welfare (measured as production in this simple example assuming we can compare fishes with buildings) of 13!

The free society will exploit naturally the absolute advantages, trying first to employ the ones with the “best” absolute advantage, disregarding the possible job misallocations that that may lead to.

“A socialist society, through the visible hand of its benevolent dictator” would allocate the employees not to their decision (based on absolute advantages) but to society’s “greater good”, taking into account comparative advantages, achieving in this example a total welfare of 16!!

This is all great, but honestly my head could not feel peaceful with this socialist victory through efficiency. It was a true puzzle, which even asking some die-hard libertarians, I couldn’t get a better answer than: “Stop talkin about Unicorns, dumb ass”

But eventually I came up with a solution to this socialist victory puzzle.

Socialism wins clearly the (short-term) battle.

But Capitalism wins the war.


Imagine you know that you may excel at something, but eventually some crazy Government bureaucrat will tell you that you are more useful to society picking thrash off the streets.

Can you feel the frustration? Yap..

Who will try their best to excel at something ever again?

Hurray for Liberty and free markets (in this simple example).

Capitalism won by inter-temporal efficiency knock-out.

I guess David Ricardo can stop now rolling in his grave.


The Money multiplier trilogy (Part III: Immortality)

After the Death and Resurrection came Immortality.

So I will try my best to reach a general theory of the multiplier.

Some initial points:

  1. Christmas. For simplification (bear with this please) I will assume that only in the 25th of December do Central Banks inject new Reserves in Banks Balance Sheets, taking into account the Central Bank goal for next year.The Banks had received during the year a bunch of loan applications and now they can finally proceed with lending. (I am not assuming banks need reserves to lend money, but if you assume the deposits a credit creates “fly away” and banks are already fully “loaned up”, banks will eventually need that High Powered Money)
  2. Banks, unlike the traditional money multiplier story (“The textbook story implicitly assumes that each bank is small relative to the whole banking system, and is looking for the Nash equilibrium.”) are not small, they have market share. Therefore, some of the deposits they create do not “fly away” they remain in the same bank.
  3. Banks create money by creating an asset (credit) alongside with a liability (deposit).
  4. Deposits are redeemable with Central Bank currency.
  5. Other assets provided by other financial intermediaries compete with deposits.
  6. Banks are obliged to have a percentage of its deposits (liability) as an asset (reserves). They may want to keep a little more than required to face uncertainty about flow of funds in the economy.
  7. Central Banks inject monetary base (reserves) through Open Mark Operations (they just swap assets in a Bank balance sheet, a bond by reserves)
  8. Banks have a market share of deposits comparing to the banking system and are expected to maintain that share.

I guess everything is settled now and abstracting from the Christmas assumption, I guess all the other points are straight forward and in accordance with Banking Theory.

Now for the model:

Grab a pencil and a paper.

ER is excessive reserves, DRR is the desired reserve ratio (legal requirement plus precautionary), c is the demand for currency by deposit created, a is the demand for other financial assets (outside the banking system – a la Tobin),  is the amount of deposits a Commercial Bank can create given ER, MS is the bank market share (the amount of deposits it has – and expects to have comparing to the system).

So, my goal is to determine what will be the amount of X we will have given ER.

Lets assume the Central Bank injects ER into a bank  by an OMO (which does not affect the liability side of the bank).

The bank will create a credit (asset) by the amount of X (and a deposit in the liability side of the same value).

The deposit will transform part of the ER into Desired Reserves (by DRR) – in the asset side.

Next as part of the deposits (liability) flow out of the Bank  depending on the bank’s market share:  (1-MS)*X, Reserves will flow out in the asset side: DRR*(1-MS)*X will represent the decrease in Desired Reserves, (ER-DRR*X) will represent the loss in Excess Reserves.

We must assume in the end that c*X*MS and a*X*MS is the proportion of the deposits that stayed in the bank that got transformed either in currency or in other financial assets. (deduction in the liability side of the balance sheet). In the asset side you must deduct: MS*DRR*X*c – MS*(1-DRR)*X*c + MS*DRR*X*a – MS*(1-DRR)*X*a.

I hope you have written everything. Now the fun starts. Let’s find how much X can a bank create for each ER it has received. By applying all the information above we have (left hand side: liabilities, right hand: assets):

(ER – DRR*X – MS*(1-DRR)*X*c – MS*(1-DRR)*X*a) – DRR*(1-MS)*X – MS*DRR*X*c – MS*DRR*X*a          =    – (1-MS)*X – MS*X*c- MS*X*a    «=» (getting rid of parenthesis)

– ER + DRR*X + MS*X*c – MS*DRR*X*c + MS*X*a – MS*DRR*X*a  – DRR*X +DRR*MS*X – MS*DRR*X*c – MS*DRR*X*a = – X + MS*X – MS*X*c- MS*X*a «=» (X to one side)

X + MS*X*c – MS*DRR*X*c + MS*X*a – MS*DRR*X*a + DRR*MS*X – MS*DRR*X*c -MS*DRR*X*a – MS*X +MS*X*c + MS*X*a = ER      «=» (X multiplied by the rest)

X * ( 1 + MS*c – MS*DRR*c +MS*a – MS*DRR*a + DRR*MS – MS*DRR*c – MS*DRR*a – MS +MS*c + MS*a) = ER     «=»

X * ( 1 + MS * (c – DRR*c +a – DRR*a + DRR – DRR*c – DRR*a – 1 + c + a) = ER «=»

X * ( 1 + MS * (2c + 2a -1 + DRR * (1 – 2c -2a) ) ) = ER

X = ER / ( 1 + MS * (2c + 2a -1 + DRR * (1 – 2c -2a) ) )

Wow…this was a long journey.

But let’s take some conclusions:

First of all, if you assume as in the textbook that each is infinitesimal comparing to the system (MS=0), its individual multiplier is 1! (like in the textbook) A bank can’t lend more than its Excess Reserves.  X = ER 

Let’s assume now that a bank is as big as the system (this is the textbook multiplier), so that MS=1 we have X = ER / ( 2c + 2a + DRR  -2DRRc  -2DRRa ) wich transforms into (as ER transform into required reserves)

X/ ER = 1/( 2c + 2a + DRR  -2DRRc  -2DRRa ) which is (kinda) like the textbook multiplier (added with the other assets).

In between (0<MS<1) banks can create more money than they have initially as Excessive reserves, but they have to take into account desired reserves, competition against other banks deposits, demand for currency and demand for other assets.

So, like I promised, in the end of the day:

  1. Banks create Money. Yes, they do. If they have the market share.
  2. Bank Reserves multiply into Bank Deposits. Yes they do, as banks seek to expand their credit, they “use up” Bank Reserves supplied by the Central Bank
  3. Banks are Financial Intermediaries. Yes, just like others (which they have to compete with), although their liabilities are Medium of Exchange (Money), they are constrained by the laws of the market and don’t have widow’s cruse.

This was a long and exhausting post. I hope I protected the fair Money Multiplier and its usefulness to understand Banking and Central Banking operations.

Nick, I gotchyour back!

(Yes, banks can “cheat” and just ask the Good Ol’ Central Bank for more “juice”)



The Money multiplier trilogy (Part II: Resurrection)

After being killed, it is worthwhile to wonder if the Money multiplier deserves a second chance.

I think it does.

So gather round the Dragon Balls because the Money Multiplier is going to be resurrected.

First things first. Why did the multiplier died, again?

Banks don’t need Reserves to make Loans! Loans create Deposits!


So, do Central Banks supply whatever the amount of reserves Commercial Banks need (to comply with legal requirements, to settle payments or to face cash withdraws) ?

Yes and no.

Yes, in the short run they do. They normally establish a interest rate target, so if they don’t comply with quantity demanded of reserves by Commercial Banks, it would lead to financial havoc as interest rates diverge from their targets.

No, Central Banks have a goal for inflation (or NGDP or …) so they must adjust their intermediate target for interest rates in a way they can achieve their ultimate goal.

So, it’s true to say both Reserves and Interest Rates are endogenous, a trustworthy central bank will only set its ultimate goal as exogenous.

Even though a Commercial Bank is not (usually) reserve constrained, as it can look for reserves in the inter-bank market, or can go to the Central Bank (either by discount or overdraft), it faces uncertainty towards the future.

Uncertainty about the “loyalness” of its depositors, uncertainty about the demand for cash, uncertainty about the demand for non-bank assets. A bank must face the uncertainty of its “usual business” liability side (Deposits) with both the “unconventional” liability side  (Central Bank lending) and the liquidity of its Asset side of the balance sheet.

Banks face restrictions. They don’t possess a widow’s cruse.

The Central Bank creates some of those restrictions. The competition among financial assets create some of those restrictions. The Economy creates some of those restrictions.

My goal is to combine the three theories of banking in a unified one (credit creation theory, Money multiplier, financial intermediary). I believe they must be all the same.

Those 3 theories can be matched with the 3 restrictions stated above. The 3 theories are all different angles of the same reality.

Banks create Money through credit. Yes.

The Central Bank influences the credit creation by supplying Reserves. Yes.

Banks are in the end of the day, just financial intermediaries. Yes.

My next post will try to create a comprehensive model which puts together the 3 theories, which in my view (with some assumptions) will grant a simplified but general view of how Banking and Central Banking works.

Let´s try to give the multiplier, Immortality.

(and create another multiplier during the process)

The Money Multiplier trilogy (Part I: Death)

The Money Multiplier is one real beauty when you start to learn Monetary Economics (most probably from Mishkin textbook). It makes you feel wise, you DO understand how Central Banks influence the Money Supply and Bankers are only pawns in this magnificent Game of Thrones of the Economy in which the Central Bank reigns supreme.

But “they” are trying to kill it!

Everyone, from Monetarists to Keynesians.

Even though in a way or another, most economists still believe in some version of the Money multiplier it’s uncool to express it that way, and you will soon find yourself ridiculed by someone who really understands banking.


I must confess my sins. I too believe the multiplier is dead.

Just look at this graph:


Bernanke killed the Money multiplier!! Quantitative Easing exposed the “truth”!

What are the problems/wrong assumptions of the Money multiplier?

  1. Normally, central banks just “follow along” the demand for reserves, so instead of a “monetary policy driven injection of reserves” Money multiplier, it really is kind of a “Money divisor” as banks look for reserves after they create loans (and deposits). And Central Banks must accommodate the banking system expansion if it wants to ensure financial stability.
  2. A straw man version of the MM assumes Banks lend reserves. This is not true. (as it may be explained later)

So, the Money multiplier has been disproved by Central Banks operations during the crisis as by some “endogenous demand driven vision of the economy”.

But still, I still believe in its beauty and we should not mourn its death, because I know it will rise again, and stronger than ever.

Nick Rowe is not alone in this fight.

Let me do my best to try to defend (my version) of the Money multiplier.

The real real interest rate

Economics is all about price determination.

At least since the Great Knut (Wicksell) we started to see the Interest Rate as the Price.

It was the most important price in the economy, its determination would set the course of economic development, both in the short as in the long run.

We still live in a Wicksellian world. Ask any Central Banker. Better yet, ask Michael Woodford, one of the leading macroeconomists.

But this post is not really just about interest rates.

It’s really about Real interest rates.

Since the Great Irving (Fisher) we learned to differentiate between the real and the nominal interest rate, so to avoid the Money Illusion.

The real interest rate is (roughly, only for small numbers) the nominal interest rate minus the ex post inflation rate. (Remember that, when we compare current interest rates with inflation this is not correct. Current interest reflects the gain we shall have in the future, current inflation reflects the loss of purchasing power in the past).

Simple example:

Savings Deposit offering 10% interest rate. Inflation rate (future) would be 20%.

Although we are 10% richer (in nominal terms) next year, we would buy less 10%of goods (to be correct is less 8,33%).

So I guess, we can say, the lower the real interest rate the higher is the incentive to avoid saving (consume). Because, and this is the main point: TO SAVE IS TO DELAY CONSUMPTION.

But at the opposite side of the coin, we have Investment.

And if we follow the same logic, the lower is the real interest rate, the higher is the incentive to Invest.

But we would be wrong (at least partially). The goal of investing is to achieve the highest possible return.

And the evolution of returns does not follow the inflation rate. That’s the main difference.

Another example.

Imagine you borrowed at 10%.

Inflation would be 20%.

Therefore we shall have a -8.33% real interest rate and therefore an incentive to invest. Right? Wrong.

Why is it wrong this time? Because nobody invests in CPI baskets.

Imagine you invested in iron, which had a 30% increase in prices. You should use iron inflation to deflate the nominal interest rate. This would lead to high incentive to invest.

Imagine you invested in oil, which had a 30% decrease in prices. You should use oil inflation to deflate the nominal interest rate. This would lead to low incentive to invest.

(Things could get really tricky, but I dont want to go that way)

Imagine you borrowed at 5% to buy something that increased its price at 10% and your income increased 5%.

Well, what really matters is nominal income growth then? Hurray for the Market Monetarists and most particularly to Geoge Selgin? (future post).


All that really matters is that we really should know what a real interest rate really is.

Enough for today.