In other words, they tighten with reserve requirements and ease with open market operations in the foreign exchange market.

FORBES: China Recalculates: Slow Down And Be Happy

The foreign-exchange market, once open and liquid, gains a new restriction every second week.

ECONOMIST: Russia��s economic quagmire

What is certain is that shared tariff walls at least do less harm than national ones, and that a large, open market is a strong inducement to foreign investment.

ECONOMIST: Brazil rocks the Mercosur boat

The difference is that Brazil's market is open and drawing in enormous amounts of foreign capital, says Citigroup Latin America strategist Geoffrey Dennis.

FORBES: Magazine Article

The difference is that Brazil's market is open and drawing in enormous amounts of foreign capital, says Citigroup (nyse: C - news - people ) Latin America strategist Geoffrey Dennis.

FORBES: This Home Boom Is Still Alive

Belarus's open border with Russia makes it an easy route for foreign firms into that burgeoning market.

ECONOMIST: Russia's western border