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.
Eponymous archon was responsible for the civic religious arrangements. After 508 BC the offices were held for only a single year, and the year was named after the archon eponymous. The year ran from July to June. The archon eponymous was the chief archon, and presided over meetings of the Boule and Ecclesia, the ancient Athenian assemblies. The archon eponymous remained the titular head of state even under the democracy, though with much reduced political importance. Under the reforms of Solon, himself archon eponymous in 594 BC, there was a brief period when the number of archons rose to ten. After 457