Giving electric cars a fancy green license plate works just as well at selling them as giving people thousands of dollars in cash.
March 20, 2026
Original Paper
Seeing Innovation: Green Plate Policy and Electric Vehicle Adoption
SSRN · 6373660
The Takeaway
Researchers found that China's 'green plate' policy increased electric vehicle sales by 6.3%, providing a boost equivalent to 4.7 billion RMB ($650 million) in government handouts. The visual status and 'informational salience' of the different colored plate worked as a low-cost behavioral nudge that outperformed massive monetary incentives.
From the abstract
Innovation such as electric vehicles is central to decarbonization and sustainability, but encouraging early adoption is costly. This study examines China's "green plate" policy, rolled out between 2016 and 2018, which uses green license plates to visually distinguish electric vehicles from gasoline vehicles. Applying difference-in-differences and synthetic control methods, we find that green plates increased EV sales by at least 6.3% (48,000) between late 2016 and 2018, an effect equivalent to