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We use the regression discontinuity model and CHNS (China Health and Nutrition Survey) data, to study the body weight-gain effect of the week-long National Day holiday in China. We find that Chinese adults tend to significantly gain 1.56 kg of body weight during the National Day holiday, and males have a larger effect. However, the effect will be smaller and insignificant in 2 weeks. It verifies the Chinese saying: People gain 1.5 kg body weight for a good holiday (mei feng jia jie pang san jin), only in the short-run.

National day holiday and Weight Gain in China: evidence from the CHNS surveys