But the US cannot improve its trade balance unless the dollar falls.

6 All references to dollars signify United States dollars.

Fewer foreign purchases of US assets again imply a weaker dollar.

The weaker dollar reduces the US standard of living.

But the US is also unhappy with the way the dollar standard is functioning.

Indeed, even when problems originate in the US, the dollar strengthens.

The US also lost interest in the scheme as the dollar strengthened.

In the US, the weak dollar will be a powerful boost to net exports, and thus to aggregate demand.

But once investors realized the extent of US financial problems, the rush into treasuries subsided, and the dollar resumed its decline.

The dollar is declining because only a more competitive dollar can shrink the US trade deficit to a sustainable level.

In the past six months, the current round of the US dollar cycle entered stage three.

The one thing that could precipitate the demise of the dollar would be reckless economic mismanagement in the US.

At last, he lost patience and announced that for the moment the US had no intention of stabilizing the dollar.

The currency has maintained the peg inherited from the gulden of 1.79 florin per 1 US dollar.

In one, the value of the dollar will be low in the other, the US will be in a depression.

The US has been complaining about China s refusal to allow its exchange rate to appreciate relative to the dollar.

US debt hardly looks like a bargain right now, even without the sinking dollar.

Given dysfunctional US fiscal policy, the dollar s resilience is surprising.

Fortunately, the market consensus concerning the dollar s inevitable rise as US interest rates increase is almost certainly wrong, for three reasons.

They are also two single currency areas the dollar and, for much of Europe, the euro.

In the case of the US, heavy dependence on imported oil has worsened the trade deficit and further weakened the dollar.

In China s view, it is not enough merely to require others to accommodate themselves to dollar devaluation.

Until the recent crisis in Greece, the US benefited from a weak dollar euro exchange rate.

The US can do a lot, in part because of the dollar s status as the main international reserve currency.

The fact is that a weaker dollar resulting from lower interest rates gives the US a slight competitive advantage in trade.

The UK wanted a system in which global liquidity would be regulated by a multilateral institution, while the US, for self interested reasons, preferred a dollar based system.

The dollar is already down 25 over the past five years, and if the US tips into recession a 50 50 chance right now the dollar is going to drop a lot more.

Alone among the world s great nations, the US did manage to guarantee dollar convertibility throughout the Great War.

The United States did something similar in 1933, when it depreciated the dollar by 69 and abandoned the gold standard.

There is also the risk of a disruptive decline in the dollar, which could prompt investors to flee US debt.

Large current account imbalances continue to characterize the global economy, and a lower dollar would contribute to reducing the United States deficit.

Fourth, central banks, especially in the US, mistakenly maintained loose monetary policy. With dollar financing by the Federal Reserve available to large institutions, the Fed became the equivalent of a world central bank.

But the changed international climate, and the possibility of a bout of severe dollar weakness, could convince the US to go along with a conversion scheme that would alleviate excessive pressure on the dollar.

In short, the euro has clearly made some headway during this period of US balance of payment deficits, but this reflects an evolutionary decline in the dollar s dominance, not a revolutionary regime shift.

Because they know that it will take time for domestic demand to pick up, emerging markets are unwilling to risk a collapse in exports to the US by allowing their currencies to strengthen against the dollar too quickly.

With the US no longer viewed as a supplier of high quality financial assets, one would expect the dollar to have weakened.

Now, as investors recall the extent of US financial problems, we will again see the dollar resume its decline.

For example, even though the United States was at the heart of the financial crisis, the dollar initially soared.

The yen s depreciation versus the dollar has contributed to continuing large US trade deficits with Japan.

There is a widespread suspicion that the US is deliberately pursuing dollar depreciation (or currency wars, in the words of Brazil s finance minister).

After all, should the dollar depreciate, China does not want to have too many eggs in the US basket.

It also means a lower value for the dollar, and thus more opportunities for US located firms to export and supply the domestic market.

This would drive up interest rates in the US and, ultimately, could trigger the dollar s collapse.

It implies that the US can kick the can down the road as long as the dollar remains the world s preeminent reserve currency, and America offers the best safe haven for skittish capital owners.

But that is not true in the United States.