14. Income Taxes

The following table summarizes income tax information:


	Three Months Ended September 30,				Six Months Ended September 30,
		2020		2019		2020		2019
Income tax provision (benefit)	$	(13,388)	$	(13,620)	$	(26,849)	$	(15,804)
Effective tax rate		23.9%		12.7%		20.9%		10.7%

Three and Six Months Ended September 30, 2020 and 2019

Fluctuations in our reported income tax rates from the statutory rate are primarily due to the impacts of our acquisition and divestiture activity, benefits recognized as a result of certain incentive tax credits resulting from research and experimental expenditures, and discrete items recognized in the three and six months ended September 30, 2020. For the three and six months ended September 30, 2019, fluctuations in our reported income tax rates from the statutory rate are primarily due to benefits recognized as a result of certain incentive tax credits resulting from research and experimental expenditures and discrete items recognized in the quarters.