Muqaddimah empires to collapse, with the result that lower revenue was collected from high rates." He wrote: Ibn Khaldun introduced the concept now popularly known as the Laffer curve, that increases in tax rates initially increase tax revenues, but eventually the increases in tax rates cause a decrease in tax revenues. This occurs as too high a tax rate discourages producers in the economy. Ibn Khaldun used a dialectic approach to describe the sociological implications of tax choice (which now forms a part of economics theory): This analysis is very similar to the modern economic concept known as the Laffer curve.
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