The following table sets forth the computation of basic and diluted loss per common share from continuing operations for the years ended December 31:

 

		2013				2012				2011
Numerator
Numerator for diluted loss per common share – loss from continuing operations		$	(131,018	)		$	(71,895	)		$	(74,163	)
Net income attributable to the noncontrolling interests			(6,461	)			(6,863	)			(8,429	)
Loss attributable to MDC Partners Inc. common shareholders from continuing operations			(137,479	)			(78,758	)			(82,592	)
Effect of dilutive securities			—				—				—
Numerator for diluted income per common share – loss attributable to MDC Partners Inc. common shareholders from continuing operations		$	(137,479	)		$	(78,758	)		$	(82,592	)
Denominator
Denominator for basic loss per common share – weighted average common shares			47,108,406				46,090,159				43,680,560
Effect of dilutive securities:
Dilutive potential common shares			—				—				—
Denominator for diluted loss per common share – adjusted weighted shares and assumed conversions			47,108,406				46,090,159				43,680,560
Basic and diluted loss per common share from continuing operations		$	(2.92	)		$	(1.71	)		$	(1.89	)

At December 31, 2013, 2012 and 2011, warrants, options and other rights to purchase, 1,488,958, 6,115,863 and 7,817,502 shares of common stock, respectively, were not included in the computation of diluted loss per common share because doing so would have had an antidilutive effect.