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Y. Liu and C. K. Woo, “California’s renewable generation and pumped hydro storage’s profitability,” The Electricity Journal, vol. 30, no. 3, pp. 15–22, 2017.

Y. Liu, C. K. Woo, and J. Zarnikau, “Wind generation’s effect on the ex post variable profit of compressed air energy storage: Evidence from Texas,” Journal of Energy Storage, vol. 9, pp. 25–39, 2017.

Y. Liu, C. K. Woo, and J. Zarnikau, “Ex post payoffs of a tolling agreement for natural gas-fired generation in Texas,” Journal of Energy Markets, vol. 9, no. 1, 2016.