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Before becoming Governor of the Federal Reserve, Ben Bernanke co-authored
several text books familiar to college students studying economics. In one
of these text books, Macroeconomics, the question of whether government budget
deficits can lead to ongoing increases in the money supply is both asked and
answered.
And the answer is yes.
"The
link is the printing of money to finance government spending when the government
cannot (or does not want to) finance all of its spending by taxes or borrowing
from the public. In the extreme case, imagine a government that wants to spend
$10 billion (say, on submarines) but has no ability to tax or borrow from the
public. One option is for this government to print $10 billion worth of currency
and use this currency to pay for the submarines. The revenue that a government
raises by printing money is called seigniorage."
It appears that over the last few months, Mr. Bernanke has been putting these
concepts into practice.
The following graph takes weekly
data released from the Federal Reserve Bank of St. Louis for the adjusted
monetary base of the United States. The monetary base consists of all currency
in circulation (known as M0) plus reserve balances with the Federal Reserve
banks. These reserve balances (also known as "vault cash") do not directly
enter the general money supply. Instead, they comprise the reserve requirement
of the banks under the fractional
reserve banking system.

Seigniorage is the revenue derived from the face value of a currency net production
costs. Thus if it costs four cents to produce a crisp new dollar bill, then
the net revenue is 96 cents. Larger denominated bills are even more profitable!
Tapping this source of revenue isn't without consequence. Expansion of the
money supply reduces the value of those notes already in circulation. Initially,
this cost may be well hidden, especially when the country is enjoying a strengthening
economy. But as the currency diminishes in value, larger and larger amounts
are needed to support government expenditures.
The present-day hyperinflation
of Zimbabwe is the latest example of a currency in the end stages of
excessive seigniorage.
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