WASHINGTON -- Congress and the White House hammered out an economic stimulus package that would put $150 billion into the hands of consumers and businesses while seeking to revive the market for large mortgages.

It was a rare display of compromise and speed in a city known recently for partisan gridlock. Both parties were responding to middle-class economic fears, as election-year nerves are frayed by a seesawing stock market, a wave of home foreclosures and a credit crunch. "I can't say that I'm totally pleased with the package, but I do know that it will help stimulate the economy," said House Speaker Nancy Pelosi.

Economists said the measures, coming as the risk of a downturn rises, could boost growth this year by between three-quarters of a percentage point and a full point.

One important provision temporarily raises the dollar limit on mortgages that can be bought or guaranteed by government-sponsored mortgage giants Fannie Mae and Freddie Mac. The current limit of $417,000 would rise above $600,000 and perhaps as high as $730,000 in the most expensive areas, congressional leaders said. (See related article.)

The centerpiece of the package is $100 billion in tax credits for an estimated 117 million families this spring. Most individuals who pay income taxes would get $600; working couples would receive $1,200. Workers who make at least $3,000 but don't pay income taxes would get checks of $300 to $600. People in both groups would get $300 credits for each of their children.