WASHINGTON — Economists surveyed by the Philadelphia Federal Reserve Bank upgraded their outlook for U.S. economic growth and the stock market, but inflation expectations were revised downward and interest rates are expected to remain relatively stable.

The Livingston Survey Thursday showed the consensus forecast for GDP growth in first half of 2013 was upgraded to 2.2% from 2.1% in the December survey. Growth forecasts for the second half of 2013 held firm at 2.3% while GDP growth for the first half of 2014 is expected to be 2.8%.

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