The buck doesn’t stop here; it just keeps falling

But imported goods, from fuel to cars from Japanese automakers and toys from China — are getting more expensive just as U.S. wages are either stagnant or falling.

American companies suddenly look cheap to acquisition-minded foreigners, particularly those based in Europe.

Belgian-based InBev's hostile bid for Anheuser-Busch is a recent example. It has bid $46 billion to acquire the company — a 30 percent premium above where Anheuser's shares traded before the June 11 proposal.

A successful acquisition by InBev would put the last remaining mass-market American brewer in foreign hands. InBev is based in Belgium but run by Brazilians. Anheuser-Busch, which brews both Budweiser and Bud light, holds a 48.5 percent share of U.S. beer sales. Anheuser-Busch rejected InBev's bid, but the Belgian brewer forged ahead, seeking to unseat Anheuser's 13-member board and take its offer directly to shareholders.

If the takeover goes through, it might open the floodgates to other foreign takeovers of American companies.

Some of the dollar's decline depends on hard-to-measure factors, like the psychology of foreign investors.

When the U.S. economy is weakening, many investors stay away. The slide of the dollar has coincided with a long period of relatively low interest rates.

And some of the decline in the dollar's global role "is due to the foreign policy failures of the Bush administration, not just to recent economic developments and policies," suggests Adam S. Posen, deputy director of the Peterson Institute for International Economics and a former economist at the Federal Reserve Bank of New York. In other words, some international investors unhappy with Bush's policy on Iraq or toward other parts of the world might not wish to invest in American companies or buy U.S. bonds.

Still, he argues that the euro is unlikely to replace the dollar as the world's main reserve currency, and that the euro may be at "a temporary peak of influence."

David Wyss, chief economist at Standard & Poor's in New York, says he envisions a day when the dollar and the euro will share billing as the world's reserve currencies.

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