FORT WORTH, Texas -- The parent of American Airlines says traffic barely changed in August compared with a year ago, but a key revenue measure rose more than at other carriers.

Fort Worth-based AMR Corp. said Tuesday that passenger revenue per available seat mile, a closely watched statistic of pricing power, rose 4.1 percent last month, reflecting the benefit of several fare increases this year.

The same figure rose 4 percent at Delta Air Lines Inc., 2 to 3 percent at Dallas-based Southwest Airlines Co. and 1 percent at US Airways Group Inc. It declined 0.5 to 1.5 percent at United Continental Holdings Inc.

AMR last November filed for Chapter 11 bankruptcy protection.
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