“…Their zero marginal cost changes the price patterns fundamentally. Tightening the emission quota leads to a severe increase in occurrences of very low electricity prices in ( Mallapragada et al., 2021 ) while also more periods of high prices are observed. The spatiotemporal dynamics of highly decarbonized electricity systems is analyzed for the US grid in the study by Brown and Botterud ( Brown and Botterud, 2021 ).…”