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The aim is to evaluate how China's ETS influences the quality and allocation of green innovation across regions.

April 6, 2026Energy Strategy ReviewsOpen Access

Does China’s ETS change the quality and allocation of green innovation when treatment timing and spatial exposure are properly modeled?

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The aim is to evaluate how China's ETS influences the quality and allocation of green innovation across regions.
Used panel data from 283 prefecture-level cities from 2010 to 2023
Employed a staggered difference-in-differences framework to account for treatment timing bias
Introduced a spatial exposure model to analyze cross-regional policy impacts
Constructed measures for green innovation quality using invention patents and citation-weighted indicators
ETS's positive impact on green patent counts was found to be more moderate and varied across regions
The policy significantly enhances innovation quality, indicating a move towards higher-value technological advancements
Spatial analysis showed innovation activity reallocates to pilot regions with limited diffusion to surrounding areas

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The study demonstrates how China's ETS affects green innovation quality in cities, indicating important spatial dynamics.

Wang et al. (2026) studied this question.

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