Income Taxes

We calculate our interim period provision for income taxes based on our projected annual effective tax rate as adjusted for certain discrete items.

The table below shows our effective tax rates attributable to continuing operations:



	Three Months Ended September 30				Nine Months Ended September 30
	2014		2013		2014		2013
Effective tax rate	40.7	%	31.4	%	38.8	%	36.3	%

Our effective tax rate normally differs from the federal statutory tax rate of 35% due to additional provision for multistate income tax obligations. Other significant items that had an impact on our effective tax rates are noted below.

Our effective tax rate for the three months ended September 30, 2013, was lower than the federal statutory rate of 35%. This difference was primarily due to a $3.7 million decrease in our provision for income taxes as a result of the reversal of a regulatory liability. This amount was related to deferred income taxes that had been recorded in prior years as a result of scheduled income tax rate changes in Illinois. We recorded the reversal

based on the income tax treatment included in the 2013 final rate order for PGL and NSG.

During the three and nine months ended September 30, 2014, there was not a significant change in our liability for unrecognized tax benefits.