My front
bicycle tire went flat. So I took out my trusty bicycle pump and put more air
into the tire. Each day my tire would go flat overnight. I kept putting more
air into it. It was getting flatter sooner and sooner and so in desperation I
decided to get a new pump. Guess what – that didn’t make any difference. The
tire kept getting flat. Why? Because the tire had a hole it that kept getting
bigger and bigger. The problem was not the pump. The problem was the tire.
Some of you
are saying. Davidson – you don’t even have a bicycle. But the truth is that I
do though it does not have a hole in its tire. Some of you are saying – where
is the macro? So here it is. I believe that exchange rates are like my bicycle
pump. The pump might be the remedy for some minor adjustments in tire pressure
but it is no match for a fundamental problem like a hole in the tire. A bicycle
pump is not a solution to a hole in a tire and the exchange rate has nothing to
do with a country’s competitiveness. If you want to fix a country or fix the
international trade of a country you should not try to do it with a bicycle
pump or with a change in the exchange rate.
This point
has some relevance to us all because many people prefer to believe the opposite.
Some folks would love to see Greece leave the Eurozone so it could have its
wonderful drachma back. Depreciating the drachma, the story goes, will restore
Greece’s competitiveness and it again will be the world’s greatest exporter of
gyros and historic buildings. Other people would love to see China appreciate
its renminbi so that the US dollar would depreciate – and restore US company’s
competitiveness in exporting Playboy Magazines and slot machines. Brazil wants
the US to stop printing money and thereby making the dollar depreciate and
hurting Brazil’s ability to export caiparinhas and topless beaches.
There is
some rationale for using an exchange rate to help offset short-term and
relatively minor changes in a country’s competitiveness. An exchange rate tells
you how much your currency is worth in terms of other currencies. So when the
dollar goes from obtaining 1300 Korean won one day to getting 1400 the next
day, we say the dollar appreciated against the won (and the won depreciated against
the dollar). In this case someone with dollars can now get with $1 the 1300 won
creampuff they usually get on the way to the bus stop on Monday and Wednesday
mornings at Anguk Station plus have another 100 won left over. With the new
exchange rate (1400 instead of 1300) that $1 can buy even more Korean stuff.
That is, you can now get the usual cream puff and a new Equus. Okay – a new
Equus costs more than 100 won but hopefully you get the point here. Big rule –
o
If
your currency depreciates, your goods and services can be obtained with fewer
amounts of foreign currency. Thus your stuff looks cheaper to the rest of the
world.
o
If
your currency appreciates, your goods and services can be obtained only with
more foreign currency. Thus your stuff looks more expensive to the rest of the
world.
o
Many
governments are driven by the fact that they want their goods and services to
appear more competitive to foreigners – so they often favor depreciating the
currency.
These three
facts help us to explain why (1) the Greeks might want to have a drachma that
they can depreciate, (2) why the US wants China to let its renminbi appreciate,
and (3) why the Brazilians want the dollar to appreciate. Like the bicycle pump
and the tire, these desires are founded by short-sighted and incomplete
analysis. And therefore, they are probably not going to lead to the results
they want.
For example,
let’s explore why these ideas could be self-defeating. Let’s suppose Brazil
gets its wish and the US manipulates foreign exchange markets in a way that the
value of the dollar rises and the value of Brazil’s currency, the real, falls.
The governments could accomplish this by selling reals and buying more dollars
in foreign exchange markets – that is the US or Brazil buys enough dollars to
significantly appreciate the dollar (depreciate the real). This tends to help
Brazil’s exports. But the story doesn’t end there. In doing this action,
dollars move out of the economic system and reals move in. That is – the US
money supply decreases and the Brazilian money supply increases. Left in place,
these monetary changes should tend to increase inflation in Brazil and reduce
it in the USA. Thus while the exchange rate manipulation seems to favor
Brazilian goods – the implied monetary changes tend to do just the opposite.
And to make things worse – both countries may not enjoy the fact that an
international action has caused them to change their monetary policy. It is
like each country loses control over its own monetary policy whenever it tries
to manipulate its exchange rate.
If you are
still following me (yawn) you might say that if the country doesn’t like the
loss of control over their money, they can always offset or neutralize the international
impact described above with a domestic monetary policy operation. In the above
case the US money supply is decreasing so the Fed can use its usual tools to
increase the money supply. The Brazilian Central Bank can absorb some of the
excess reals by a domestic operation that decreases its money supply. This has
some merit but notice that this too is temporary. The tire has a hole in it.
That is, whatever caused the trade imbalance between the US and Brazil will
continue. What appears to be a one-time event becomes a more continuous one
with the US constantly encountering disinflation and increasing its money
supply and Brazil facing inflation and then tightening its money supply. If you
are still awake you can see how crazy all this is.
This is
because there is a hole in the tire with respect to trade. Brazil says that
their trade problem is caused because of a highly accommodative US monetary
policy that causes a global depreciation of the dollar. If this is correct,
then the solution is for the US economy to return to normal monetary growth and
interest rates. Of course, Brazil might consider that at least part of their
loss in competitiveness comes from a world slowdown that has reduced the global
demand for the commodities that Brazil exports. The hole in Brazil’s tire is,
therefore pretty big. It may take some time for the US and the world to return
to strong growth In the meantime, Brazil can work harder at internal factors
that might promote its global competitiveness. But simply manipulating exchange
rates is going to do very little and most likely will lead to reduced
competitiveness as monetary effects increase Brazilian inflation and worsen
their situation.
The same can
be said of the issues with respect to Greece and the Eurozone and the issues
between the US and China. Greece needs a currency depreciation like it needs a
hole in the head. If Greece wants to be in the EU then it needs to try to be
more like other EU countries. When Greece gets is labor and product markets as
well as its government wages and pensions a little closer to the average EU
country, then perhaps it has a chance of overcoming imbalances in its dual
deficits in trade and government accounts. If Greece even pretends a tiny bit
like it is going along with the prescription, both the EU and the IMF will
likely continue to help them. That will buy them time to get fixed. The drachma
and a depreciation might also give them time but notice that they still would
need to fix their problems. And in the meantime all hell would break loose in
Greece when they left the Eurozone.
The same can
be said about the US and China. In this case there is a 16-wheeler full of tire
holes. No one REALLY believes that a further depreciation of the dollar against
the renminbi is going to succeed in restoring the trade balance. The US has had
global trade deficits for decades despite a trade-weighted dollar that has done
nothing but decline. Most economists believe the US saves too little and China
saves too much. Neither of these tendencies is going to change anytime soon.
Depreciating the dollar will likely do nothing but cause inflation in the US as
we pump even more dollars all over the world. The US needs to pay attention to
saving and to the other adjustments that could make us more productive,
innovative, and competitive. China needs to rebalance its economy away from
saving toward more consumption. Only when these savings imbalances are
corrected in the US and China will headway be made with the trade balance with
China and the world.
The exchange
rate is a rubber crutch. Countries need to tend to their knitting or tire
mending.