Laffer curve and possible differences in the incentive to work for different income groups complicate the task of estimation. The structure of the curve may also be changed by policy decisions. For example, if tax loopholes and tax shelters are made more readily available by legislation, the point at which revenue begins to decrease with increased taxation is likely to become lower. Laffer presented the curve as a pedagogical device to show that in some circumstances, a reduction in tax rates will actually increase government revenue and not need to be offset by decreased government spending or increased borrowing. For a reduction
According to Jim sense for us". But on June 27, 2007, ABC renewed the show for a seventh season with 18 episodes. "According to Jim" returned to ABC's schedule on Tuesday January 1, 2008, with two episodes at 9 pm and 9:30 pm. After that, the series moved to its regular time slot at 8 pm. Despite the writer's strike, ABC announced that the show would produce all 18 episodes ordered for this season. On February 27, 2008, it was reported that ABC was close to renewing "According to Jim" for an eighth season. On May 13, 2008, ABC officially renewed the series