Summary statistics of the sample.

Effectively regulating the excessive consumption of sugar-sweetened beverages (SSBs) has been an important task for public health authorities around the world. The rapid increase in SSB consumption in China necessitates robust regulations. This study employed a choice experiment to simulate the market scenario in which a text warning label was presented on SSBs. We draw a sample of 1200 participants from five major cities across China to analyze the warning label’s effectiveness in reducing urban consumers’ purchases of SSBs, with a particular emphasis on how an individual’s habit strength affects their reaction to the warning label. Our analysis unveiled varying levels of habit strength among respondents: 35.33% showed weak habits, 56.25% displayed moderate habits, and 8.42% demonstrated strong habits. The random parameters logit model results showed a significant overall decrease in SSB purchases when a warning label was present, indicated by a significant negative coefficient associated with the label. However, when examining the impact of warning labels across different habit strengths, a significant effect was observed only in the moderate habit group. Furthermore, within this group, the warning label was more effective for those with correct health knowledge and who were not overweight or obese.

有效管控含糖饮料（sugar-sweetened beverages，SSBs）的过量消费，是全球各国公共卫生主管部门的重要工作之一。当前我国含糖饮料消费增速迅猛，亟需出台强有力的监管举措。本研究采用选择实验法，模拟了在含糖饮料上张贴文字警示标签的市场场景。研究从全国五大核心城市招募1200名参与者作为样本，旨在分析警示标签对降低城市消费者含糖饮料购买量的效果，并重点探究个体饮用习惯强度如何影响其对警示标签的响应。分析结果显示，受访者的饮用习惯强度存在显著分层：35.33%表现为弱习惯，56.25%为中等习惯，8.42%为强习惯。随机参数logit模型的结果表明，当张贴警示标签后，受试者的含糖饮料购买量整体出现显著下降，表现为标签对应的系数显著为负。不过，分习惯强度层级拆解警示标签的影响时发现，仅中等习惯组的购买行为出现了显著变化。进一步细分该群体可见，对于掌握正确健康知识、且体重正常（非超重或肥胖）的受访者，警示标签的干预效果更为突出。