In the past, when evaluating tax proposals, neither the Congressional Budget Office nor the Joint Committee on Taxation were permitted to factor in the effect of economic growth on tax revenue.

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Because Colombian departments are not permitted to raise taxes, most of Narino's operating revenue comes from sale of state-produced alcohol but there is little or nothing available to fund new initiatives.

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The Congressional Budget Office (CBO) is legally not permitted to consider these behavioral changes when it estimates how budget changes will impact revenue.

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