@article{GrQu21,
	author = {Christoph Graf and Federico Quaglia and Frank A. Wolak},
	title = {(Machine) learning from the COVID-19 lockdown about electricity market 
performance with a large share of renewables},
	journal = {Journal of Environmental Economics and Management},
	volume = {105},
	pages = {102398},
	year = {2021}
}