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posted a 15% jump in third-quarter earnings, in line with its estimate given last week, as sales remained strong in the U.S. and margins improved.

The fast-food giant's earnings rose to $843.3 million, or 68 cents a share, from $735.4 million, or 58 cents a share, a year earlier. The results matched analysts' average estimate, according to Thomson First Call.

Last week, McDonald's preannounced earnings of 68 cents a share in conjunction with the release of its September sales results. At the time, the forecast was a nickel ahead of analysts' projection as September sales showed strength, bolstered by the company's breakfast menu and new Snack Wrap.

McDonald's revenue for the quarter climbed to $5.88 billion from $5.33 billion a year earlier. Global same-store sales rose 5.8% -- the highest level in two years.

The company also said that it had higher margins across all of its segments, including the highest levels in Europe since 2001.