Guojun He et al. ,Reducing single-use cutlery with green nudges Evidence from China’s food-delivery industry.Science381,eadd9884(2023)

Objective:

• How alibaba’s green nudges affected individuals’ cutlery decisions

Case:

• 10 major cities, China

Methodology:

• DID
• Parallel trend: event study
• Difference-in-discontinuities specification

Data Source

• Eleme orders

Findings:

• The share of no-cutlery orders significantly increased in the treated cities

• Green nudges increased the share of no-cutlery orders by 19.3%-21.2.

• Nearly 83% of the individuals in the treated cities responded positively to the green nudges; about 6% of the individuals didn’t change, and 11% behaved in the opposite direction
• Green nudges on the platform’s business performance is negligible and statistically nonsignificant

• The effects were larger for women

Coding Reference:

• Stata