Consumer expenditure, elasticity and value of food waste: A quadratic almost IDEAL demand system for EVALUATING changes in Mexico during COVID-19

Household food waste is a phenomenon primarily produced by consumer habits and behaviors. The necessary confinement measures implemented worldwide to contain the Covid-19 pandemic altered these consumer practices. This paper examines how household's culinary traditions and food management have changed in Mexico and their impact on food waste. We obtained 525 answers using an online survey about food habits distributed through social networks in Mexico between December 2020 and January 2021. The results show that the participating households increased their monetary expenditure on groceries during the pandemic and reduced food waste. The estimation of consumer responsiveness to waste, through the introduction of a framework based on a Quadratic Almost-Ideal Demand System, confirms that, even more during the lockdown, food waste has become a luxury good. The analysis of food category changes allows for a detailed study useful to curtail the level of food waste in Mexican households and encourage transitions towards sustainable and circular consumption behavior.s