(11) Income Taxes:

The following is a reconciliation of the provision for income taxes computed at the federal statutory rate to income taxes computed at the effective rate:



	For the three months ended
	March 31,

	2018		2017

Consolidated tax provision at federal statutory rate	21.0	%	35.0	%
State income tax provisions, net of federal income
tax benefit	7.2		0.2
Remeasurement of certain deferred tax balances	(11.9)		-
Tax reserve adjustment	1.2		(0.6)
Changes in certain deferred tax balances	14.2		-
Shared-based payments	10.6		(1.8)
Federal research and development tax credit	(2.0)		0.9
All other, net	0.8		0.5
Effective tax rate	41.1	%	34.2	%

Under ASC 605, income tax expense would have been $2 million lower for the three months ended March 31, 2018, as a result of changes in pre-tax income as discussed in Note 3.

Amounts pertaining to income tax related accounts of $0 million and $2 million are included in “Income taxes and other current assets” in the consolidated balance sheets as of March 31, 2018 and December 31, 2017, respectively.