“…Several recent studies seek to understand the effects of low natural gas prices on electricity generation and emissions (Knittel, Metaxoglou, and Trindade, 2015;Cullen and Mansur, 2017;Holladay and LaRiviere, 2017;Linn and Muehlenbachs, 2018;Johnsen, LaRiviere, and Wolff 2019). A few studies seek to understand the effects of a broader set of factors-including natural gas prices, environmental regulations, and renewables, among others-on a variety of coal and electricity market outcomes (Houser, Bordoff, and Marsten, 2017;Linn and McCormack, 2017;U.S.…”