12.Income taxes

Income tax expense reflects the federal statutory tax rate and the weighted average state statutory tax rate for the states in which the Company operates stores. Income tax expense of $38,933 for the 13 weeks ended November 2, 2019 represents an effective tax rate of 23.1%, compared to $39,365 of tax expense representing an effective tax rate of 23.1% for the 13 weeks ended November 3, 2018.

Income tax expense of $134,729 for the 39 weeks ended November 2, 2019 represents an effective tax rate of 21.8%, compared to $132,771 of tax expense representing an effective tax rate of 23.0% for the 39 weeks ended November 3, 2018. The lower effective tax rate is primarily due to income tax accounting for share-based compensation and federal income tax credits.