WASHINGTON — President Barack Obama signed a $24 billion economic stimulus bill into law Friday, giving tax incentives to prospective homebuyers and additional jobless benefits to those idled by the business slump.

The bill-signing came a day after the House, displaying rare bipartisan agreement over the troubling employment picture nationally, voted 403-12 to pass the measure. The Senate had approved it on Wednesday.

The White House said the law, which also includes tax cuts for struggling businesses, builds on provisions in the $787 billion stimulus package enacted last February to avert an economic meltdown.

The law provides another 14 weeks of benefits to all out-of-work people who have exhausted their benefits or will do so by the end of the year, estimated at nearly 2 million. Those in states where the jobless rate is 8.5 percent or above get an additional six weeks.