1. Green politics: a Norwegian experience;Aardal;Scand. Polit. Stud.,1990
2. Design-based analysis in difference-in-differences settings with staggered adoption;Athey;J. Econom.,2021
3. Incentives for promoting battery electric vehicle (BEV) adoption in Norway;Bjerkan;Transport. Res. Transport Environ.,2016
4. Did: difference in Differences;Callaway,2020
5. Difference-in-differences with multiple time periods;Callaway;J. Econom.,2020