Employee incentive programs (Tables)

6 Months Ended

Jun. 30, 2013

Employee incentive programs

Schedule of changes in LTIP notional shares

(Units in thousands)		Units			Grant Date Weighted-Average Price per Unit

Outstanding at December 31, 2012			492,535		$	13.9
Granted			587,201			4.9
Additional shares from dividends			27,151			10.0
Forfeited			(42,000	)		12.3
Vested			(202,696	)		13.5

Outstanding at June 30, 2013			862,191		$	7.8

Schedule of assumptions for calculation of simulated total shareholder return under the Monte Carlo model

		June 30, 2013			December 31, 2012

Weighted average risk free rate of return			0.1 – 0.6%			0.1 – 0.3%
Dividend yield			9.7%			10.1%
Expected volatility—Atlantic Power			37.9 – 62.1%			22.5%
Expected volatility—peer companies			14.7 – 82.7%			11.9 – 97.1%
Weighted average remaining measurement period			2.2 years			1.4 years