Sustainability labelling is an extremely complex, multifaceted, and debated topic. Through a systematic and meta-analytical approach, we disentangled the informative contents of environmental and social labels and investigated their effect on the consumer willingness to pay for food products. The premium prices for sustainability labels are largely heterogeneous depending on the information disclosed. Generic and specific messages seem not to differ in terms of consumer acceptance. Not all facets are equally important as social issues tend to be less considered. Policy interventions should combine hard and soft measures to holistically achieve sustainability in the food system.

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关于为食品可持续性标签付费的意愿：荟萃分析

可持续性标签是一个极其复杂、多方面且备受争议的话题。通过系统的元分析方法，我们理清了环境和社会标签的信息内容，并研究了它们对消费者购买食品的意愿的影响。可持续发展标签的溢价很大程度上取决于所披露的信息。一般信息和具体信息在消费者接受度方面似乎没有差异。并非所有方面都同等重要，因为社会问题往往较少被考虑。政策干预应结合硬措施和软措施，全面实现粮食系统的可持续性。