Purpose Food waste is a systemic problem, with waste occurring at all stages in the supply chain and consumption process. There is a need to unpack which strategies, approaches and tools can be applied to reduce the amount of food wasted. Understanding the extent of social marketing principles used offers insights into the additional means that can be applied to increase voluntary behavioral change. Design/methodology/approach Following preferred reporting items for systematic reviews and meta-analyses guidelines, a systematic quantitative literature review was undertaken focused on outcome evaluation studies conducted since 2000. Six databases were examined, and cross rating was used to identify previous programs tackling food waste behavior at a household level. A total of 23 programs were analyzed against 8 social marketing components. Findings Overall, only 2 out of 23 food waste programs self-identified as social marketing programs. A lack of application of social marketing elements was observed across all studies, indicating a tendency to implement non-voluntary change approaches. The most commonly targeted behaviors were source-separation. Personal interaction involved the distribution of information in person (typically through door knocking). Personal interaction strategies were identified as the most effective program techniques. Program effectiveness was greater when the social marketing components of behavioral change, theory and marketing mix were used, indicating the potential for voluntary approaches to be applied more in the future. Originality/value To the best of the authors’ knowledge, the current study was the first systematic literature review to examine the extent of social marketing application in food waste programs reported in peer-reviewed academic literature using eight components of social marketing. The study revealed behavioral change was more likely when more social marketing components were used. Future research is recommended to consider the application of full range of social marketing elements to extend beyond involuntary approaches, which can be subjected to criticism from community.

Highlights •Expert opinions are dominant in previous food waste reduction campaign design• Social marketing and co-design processes allow the inclusion of the views of the consumers •Extensive formative research addressed the discrepancy between expert and consumer views Highlights (for review

Purpose Calls for theoretically informed interventions and a more reflexive stance are apparent in social marketing. Moving from a “prove” to “improve” mentality requires evaluations that learn from experience gained to identify improvements to inform future programme success. This paper considers the value of inclusion of stakeholders in process evaluation. Design/methodology/approach Two participant groups (n = 90, n = 182) and one key stakeholder group (n = 22) were surveyed in person, over the phone and online. Open-ended qualitative responses were analysed for recurring themes. Findings Key stakeholders contribute unique and valuable insight into programme implementation and engagement, expanding evaluation beyond participant feedback. Most notably, the process evaluation illuminated the engagement insight of programme volunteers, mid-level expansion opportunities offered by participating chefs and the perceived value of involvement across all stakeholder groups. Research limitations/implications The study is limited by a lack of systematic stakeholder identification and to a single context, namely food waste. Practical implications This paper affirms the importance of process evaluation and application of stakeholder theory to social marketing. These contributions suggest a widened focus for the widely accepted NSMC benchmark criteria which centre attention on the end users targeted for change. Stakeholders should be included in process evaluations given they contribute important and unique partnership insights. Originality/value This paper extends stakeholder theory use in social marketing providing showcasing potential for this approach to deliver a more reflexive stance.

Background: Evidence indicates behavior change is more likely when more social marketing benchmark principles are applied. Yet, transparent and clear reporting of the application of benchmarks to change behavior is rare. Focus of the Article: The aims of this study were (1) to verify the efficacy of social marketing in reducing food waste and (2) to enumerate and critique the practicality of applying social marketing benchmark criteria. Research Question: To address the research aims, two research questions were proposed: (1) Can a social marketing program designed with consumers reduce household food waste behavior? and (2) How are social marketing benchmarks applied to reduce food waste? Program Design/Approach: A consumer-insight driven social marketing program Waste Not Want Not (WNWN) was designed following the social marketing process and delivered to local Redland City Council residents located within the pilot area. This article reports a process and outcome evaluation for the pilot study and a critical evaluation of benchmark criteria application. Importance to the Social Marketing Field: This article demonstrates social marketing’s efficacy to reduce food waste behavior in households, and it critically evaluates application of benchmark criteria to assist future research and practice. Methods: In total, 314 local council area residents were randomly allocated into either a program ( n = 110) or control group ( n = 204). The program group received intervention materials and invitations to attend the 2-week program activities held in a local shopping center. Control group participants received nothing. The extent of social marketing benchmark application was examined for the WNWN program. Results: Outcome evaluation indicated that the pilot study reduced self-reported household food waste and increased perceived level of self-efficacy in cooking for the program group, but not the control group. WNWN successfully applied five of the eight social marketing benchmark criteria, namely, consumer orientation, insight, competition, marketing mix, and behavior change. Recommendations for Research or Practice: Given that use of more benchmarks increases the likelihood of behavior change, future research must advocate for complete application of the eight major social marketing benchmark criteria in program design. Clear operational definitions are required to improve practice and behavioral change outcomes. Limitations: Study 1 focused on individual feedback and self-reported data minimizing the possibility of generalization. Future research could employ observational methods and involve a wider array of stakeholders to increase generalizability.

Decentralized waste sorting and composting can divert almost two-thirds of household waste from landfill. However, national rates of composting and recycling remain low in many parts of the globe. This review critically evaluates the design and efficacy of behaviour-change interventions to influence households to sort and compost organic waste. The systematic literature search yielded 3595 titles and abstracts which were reviewed and resulted in 14 unique interventions. The social marketing benchmark criteria are utilized to critically examine the design of these interventions. Synthesized results indicate a need for customized interventions that are co-designed with users and tailored to address their specific needs and challenges. Interventions with four or more social marketing elements produced positive behavioural outcomes, albeit with varying impact. This review highlights gaps in the design of waste management interventions and provides suggestions for future practices.