Economics Within the Realm of Food Waste

Article by Ethan Xiao, Senior at Dublin High School in Ohio

Food waste is a huge issue with major environmental, economical, and social impacts. Despite various campaigns to encourage more sustainable consumption, people still end up buying too much food and waste it. In this paper, I explore behavioral economics concepts like loss aversion, status quo bias, and hyperbolic discounting to understand why people over-purchase and waste food. I'll also look at behaviors like overbuying, misreading expiration dates, and serving overly large portions to identify where we can intervene. The goal is to eventually implement community-based solutions in grocery stores and cafeterias to help curb these behaviors.

Loss aversion is when people prefer to avoid losses rather than making gains. In terms of food shopping, this means that people don’t want to miss out on deals or discounts, so they end up buying more food than necessary. Promotions like "buy one, get one free" create this sense of urgency, making people feel like they’re losing out if they don’t take advantage. That emotional response can lead to food being bought that ultimately won’t be eaten and will just go to waste.

Status quo bias means people tend to stick with what they know, even when making a change would be better for them. In the context of buying food, this might explain why people keep buying the same quantities and types of food out of habit, even when their needs have changed. This can also apply to portion sizes—people are resistant to change, even when their portions are too big and end up causing waste. In both cases, it’s about comfort and routine more than thinking about what’s actually needed.

Hyperbolic discounting refers to the tendency to prioritize immediate rewards over future ones. In terms of food waste, this can lead people to make impulsive purchases based on what they want in the moment, rather than planning for what they will realistically eat later. For example, someone might buy too many perishable items, overestimating how much they’ll want to cook during the week. This can lead to spoilage because the food isn’t eaten in time.

Overbuying is a key factor in food waste. Many people buy more food than they need, either because they’re afraid of running out, feel pressured by bulk deals, or just don’t know how to properly estimate how much food they actually need. Bulk buying can also cause people to consume more than necessary, just because they have an abundance of food at home. Marketing tactics like discounts and deals often make the problem worse by appealing to our loss aversion tendencies.

A lot of food waste comes from people misunderstanding expiration dates. People often confuse "sell-by," "best-before," and "use-by" dates, throwing away food that’s still safe to eat. This behavior stems from a lack of understanding of food labels and sometimes an overly cautious attitude about food safety. In this case, loss aversion plays a role too—people would rather throw away food than risk eating something they think might make them sick.

Poor portion control, especially in restaurants and cafeterias, leads to significant amounts of wasted food. People often overestimate how much they can eat, resulting in food being left uneaten. This behavior is linked to status quo bias—people tend to stick to the portion sizes they’re used to, even when they’re too large. Restaurants also contribute by offering large portions, which can encourage people to over-order or feel guilty about not finishing their meal.

There are several points where we can intervene to reduce food waste.

At the Point of Purchase: Grocery stores can use reminders and visual cues to encourage shoppers to plan their meals better and avoid overbuying. Educational signs can explain expiration dates and provide guidance on portion sizes. Grocery apps or personalized shopping lists could help customers buy only what they really need.

In the Home: At home, people could use tools like portion-control plates or apps that track expiration dates and suggest recipes using ingredients they already have. These could help people manage their food better and reduce waste.

In Cafeterias and Restaurants: Offering smaller portion sizes in cafeterias and restaurants could cut down on waste. Buffets could limit portions or encourage diners to take only what they need. In both cases, signs and prompts can educate people about the impact of food waste and nudge them toward more mindful decisions.

To create effective solutions, we first need to gather data on how people buy and consume food. Surveys and observational studies can help us understand how often people overbuy or misinterpret expiration dates. Grocery store data can show trends in buying behaviors and waste, while studying restaurant portion sizes can help identify where to target interventions. Understanding how promotions and discounts influence overbuying will be especially useful for developing interventions that curb these wasteful behaviors.

Based on the data, we can try out community-based solutions in real-world environments like grocery stores and cafeterias. For example, grocery stores could work with local governments to run campaigns that encourage smarter shopping habits, like only buying what’s needed. Schools and universities can raise awareness about food waste, and restaurants can offer flexible portion sizes or take-home containers. To make these solutions effective, collaboration between businesses, policymakers, and consumers will be essential.

ConclusionBehavioral economics offers valuable insights into why people over-purchase and waste food. By understanding the psychological factors behind food waste—like loss aversion, status quo bias, and hyperbolic discounting—we can design targeted interventions to reduce overbuying, expiration date confusion, and poor portion control. Ultimately, these efforts can lead to practical, community-based solutions that promote more sustainable consumption habits and significantly cut down on food waste.