(6)	Income Taxes

The provision for income taxes is based on the current estimate of the annual effective tax rate and is adjusted as necessary for discrete events occurring in a particular period. The effective tax rates for the thirteen weeks ended May 5, 2018 and April 29, 2017 were 13.8% and 25.9%, respectively. The effective tax rate was lower for the thirteen weeks ended May 5, 2018 primarily as a result of the provisions of the recently enacted Tax Cuts and Jobs Act, which, among other things, permanently lowered the federal corporate tax rate to 21% from the prior maximum rate of 35%, effective for tax years including or commencing January 1, 2018. In addition, the thirteen weeks ended May 5, 2018 and April 29, 2017 included a discrete tax benefit of $3.9 million and $3.2 million, respectively, due to excess tax benefits related to stock-based compensation.