Sixty percent of the leaders of U.S. multinational corporations are optimistic about the prospects for the economy over the next 12 months, PricewaterhouseCoopers' Management Barometer survey found. Another 42% said they are confident about the world economy. That was up markedly from the first quarter, when only 34% said they were upbeat on the U.S. economy and only 28% were optimistic about international prospects. Revenue growth, new investments and new hiring, however, concern them.

"For the first time in four consecutive quarters, more than half have a positive outlook," said Frank Brown, PwC's global leader for assurance and business advisory services.

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