Polzin Samuel S, Lusk Jayson L, Wahdat Ahmad Zia
Center for Food Demand Analysis and Sustainability, Purdue University, 403 W. State Street, West Lafayette, IN, 47907, USA.
Center for Food Demand Analysis and Sustainability, Purdue University, 403 W. State Street, West Lafayette, IN, 47907, USA; Agricultural Economics Department, Purdue University, 403 W. State Street, West Lafayette, IN, 47907, USA.
Appetite. 2023 Jan 1;180:106369. doi: 10.1016/j.appet.2022.106369. Epub 2022 Nov 12.
Consumer food purchasing and willingness to adopt a sustainable healthy diet (SHD) is a key factor affecting the sustainability of the entire food system. Studies have developed scales to measure consumer preferences for particular consumption patterns, while others have sought to empirically define the multiple dimensions of a sustainable food system (environmental, social, economic, etc.). This paper builds on these literatures by tracking consumers' SHD behaviors using a large-scale, longitudinal survey of adults in the United States and mapping them onto multiple systems-level indicators. We wanted to know whether consumers interact with the sustainability of their food along the same principles developed by experts. Our study defines 18 food purchasing behaviors that support the sustainability goals of leading scientific institutions, uses factor analysis to identify the unobserved drivers behind these behaviors, and creates SHD scores to investigate their correlations with other consumer characteristics and behaviors. Factor analysis results show consumer food purchasing is motivated by three underlying sustainability dimensions-Economic Security, Socio-Environment, and Nutrition-which are fewer constructs than often defined by academic researchers. SHD scores reveal higher adoption of behaviors that fall under Economic Security relative to the other two dimensions. All three sustainability constructs are impacted by socio-economic and demographic characteristics.
消费者的食品购买行为以及采用可持续健康饮食（SHD）的意愿是影响整个食品系统可持续性的关键因素。已有研究开发了量表来衡量消费者对特定消费模式的偏好，而其他研究则试图从实证角度界定可持续食品系统的多个维度（环境、社会、经济等）。本文以这些文献为基础，通过对美国成年人进行大规模纵向调查来追踪消费者的SHD行为，并将其映射到多个系统层面的指标上。我们想了解消费者是否按照专家制定的相同原则与他们食品的可持续性进行互动。我们的研究定义了18种支持领先科学机构可持续发展目标的食品购买行为，使用因子分析来识别这些行为背后未被观察到的驱动因素，并创建SHD得分以研究它们与其他消费者特征和行为的相关性。因子分析结果表明，消费者的食品购买行为受三个潜在的可持续性维度驱动——经济安全、社会环境和营养，这些维度的结构比学术研究人员通常定义的要少。SHD得分显示，相对于其他两个维度，经济安全维度下的行为被采用得更多。所有这三个可持续性结构都受到社会经济和人口特征的影响。
