NET INCOME PER SHARE

12 Months Ended

Dec. 31, 2018

Net income per share attributable to TTEC stockholders

NET INCOME PER SHARE

(17)NET INCOME PER SHARE

The following table sets forth the computation of basic and diluted shares for the periods indicated (in thousands):

	Year Ended December 31,
	2018	2017	2016
Shares used in basic earnings per share calculation	46,064	45,826	47,423
Effect of dilutive securities:
Stock options	6	10	10
Restricted stock units	314	536	286
Performance-based restricted stock units	1	10	17
Total effects of dilutive securities	321	556	313
Shares used in dilutive earnings per share calculation	46,385	46,382	47,736

For the years ended December 31, 2018,  2017 and 2016, there were zero,  zero and 60 thousand options to purchase shares of common stock or performance-based restricted stock that were outstanding but not included in the computation of diluted net income per share because the exercise price exceeded the value of the shares and the effect would have been anti-dilutive. For the years ended December 31, 2018,  2017 and 2016, restricted stock units of 212 thousand, 21 thousand, and 71 thousand, respectively, were outstanding but not included in the computation of diluted net income per share because the effect would have been anti-dilutive.