The Last Bite: Exploring behavioural and situational factors influencing leftover food waste in households

• Consumer motivations have a strong influence on household leftover food management. • Motivations to reduce leftover waste are driven by negative feelings associated with it. • Meal planning, food inventory and storage management affect leftover food waste. • Competing goals interfere with reducing household leftover food waste. Food leftovers are a major contributor to household food waste. However, the drivers of household food leftover management practices are less understood. This study analyses the leftover food management behaviour using the Motivation-Opportunity-Ability framework. A Structural Equation Modelling (SEM) analysis was used to empirically test the influence of motivation, opportunity, ability, and competing goals on self-reported leftover food management practices of Australian consumers. The results show consumers’ motivation is strongly associated with leftover food management practices. Particularly, consumers are motivated not to waste food because of negative feelings towards wasting food and understanding the consequences of leftover food waste. Consumer abilities in meal planning, efficient cooking, food inventory management, interpreting expiry dates, and food storage also significantly affected leftover food management in the home. The availability of time, information technology and lifestyle showed a relatively weaker impact on leftover food management. Competing goals of eating healthy, safe, and tasty food and having enough food lower the interest in leftover food management in the home. Understanding the drivers of leftover food management can guide designing interventions to promote behaviour change in preventing leftover waste.