The only way that we can reduce our financial dependence on the inflow of funds from the rest of the world is to reduce our trade deficit.

To finance this trade deficit, the U.S. has to borrow from the rest of the world or sell American assets like stocks, businesses, and real estate to the rest of the world.

But because we in the United States finance our current account deficit by borrowing in our own currency, we can move to a more competitive dollar without the adverse effects that followed currency declines in other countries.

A second reason why science cannot replace judgement is the behavior of financial markets.

And finally, no matter how good the science gets, there are problems that inevitably depend on judgement, on art, on a feel for financial markets.