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.

家庭食物浪费是一种主要由消费者习惯和行为产生的现象。为遏制 Covid-19 大流行而在全球范围内实施的必要限制措施改变了这些消费者行为。本文探讨了墨西哥家庭烹饪传统和食品管理的变化及其对食物浪费的影响。我们使用一项关于 2020 年 12 月至 2021 年 1 月期间通过社交网络在墨西哥分发的饮食习惯的在线调查获得了 525 个答案。结果表明，参与的家庭在大流行期间增加了他们在杂货上的货币支出并减少了食物浪费。通过引入基于二次近似理想需求系统的框架，对消费者对浪费反应的估计证实，甚至在封锁期间，食物垃圾已经成为一种奢侈品。对食品类别变化的分析允许进行详细研究，这有助于减少墨西哥家庭的食品浪费水平，并鼓励向可持续和循环消费行为转变。