This article by Michael L. Ross, Chad Hazlett, and Paasha Mahdavi uses new data to measure net taxes and subsidies for gasoline in almost all countries at the monthly level. It finds evidence of both progress and backsliding suggesting that global progress towards fossil fuel price reform has been mixed with many governments failing to exploit one of the most cost-effective policy tools for limiting greenhouse gas emissions. The article was published in Nature Energy and is available to purchase online.