The basic logic of loss aversion theory

"Loss aversion" is a core concept in Prospect Theory, proposed by Kahneman and Tversky, which means that an individual's pain perception of losses is usually greater than the pleasure of gains of equal value. For example, people tend to think that the negative emotions caused by losing 100 yuan are greater than the positive emotions caused by gaining 100 yuan.

When this psychological mechanism is applied to consumption behavior, it shows a strategic tendency to "keep what you have first". In other words, instead of worrying about not having it in the future, it’s better to get it now. The hoarding behavior is a direct reflection of this logic: even if there is actually no shortage of goods in the short term, because people are extremely averse to the "in case of shortage" situation, this emotion drives them to take over-prepared actions.

Especially when faced with high uncertainty (such as in the early stages of an epidemic), people tend to be more pessimistic in their subjective judgments of risks and more exaggerated in their imaginations of losses, which further strengthens the rational expectations of hoarding behavior. This psychological path makes loss aversion a key clue in understanding large-scale hoarding behavior.

The “irrational” appearance and structural logic of hoarding behavior

On the surface, hoarding behavior does not conform to the traditional rational economic man model. According to supply and demand analysis, excessive hoarding when supply is not interrupted and prices do not increase is not cost-effective and may even lead to a waste of household resources. However, behavioral economics points out that human decisions are often not based on factual probabilities, but on "perceived probabilities" and "anticipated emotions."

Hoarding is a manifestation of this "emotion-oriented rationality". First, “future uncertainty” leads people to exaggerate the likelihood of worst-case scenarios. Secondly, opportunities that are “currently available” will be psychologically given a higher value. The combination of the two makes people willing to pay costs beyond their rational budget in exchange for the psychological security of "avoiding possible losses."

More importantly, stocking up has the strategic advantage of “locking in the future at once”. Even if there may be no need for so much toilet paper or fast food in the future, people would still rather over-prepare now than expose themselves to a "future of shortages." This preference shows that loss aversion is not a short-term reaction, but a reflection of a long-term survival strategy in consumption scenarios.

Group effect and the transmission mechanism of “social loss sense”

The reason why hoarding behavior is explosive often stems from the cross-amplification of group psychology. When some people start hoarding and the shelves are empty, people who had not originally planned to stock up will start to worry that they are "one step behind" and join the buying process. This mechanism reflects the concept of "relative loss": the loss is not only the material itself, but also the resource disadvantage compared with others.

Psychologists call this herd loss aversion. In this logic, individuals are not guided by others to pursue additional gains, but are driven by collective actions to "avoid bearing losses alone." It's like watching someone get up and run in a theater. Even if there's no fire, you can't help but stand up because the cost of staying put becomes extremely high.

In addition, in the era of social media, this transmission speed has been greatly accelerated. When a photo of an empty supermarket shelf is spread to thousands of people, each recipient may mistakenly think that "everyone is grabbing it", thus stimulating their own sense of loss aversion. The behavioral reinforcement produced by this "visual evidence" is far more motivating than abstract words.

Case Study: The Psychological Dynamics of Panic Buying of Toilet Paper During the Epidemic

In early 2020, during the early stages of the COVID-19 outbreak, there was an unprecedented rush to buy toilet paper around the world. Media reports, Sina Weibo, and Twitter quickly spread pictures and videos of "toilet paper emergency". Even though the supply of toilet paper in most countries has never been interrupted, this type of hoarding behavior still spreads rapidly.

From the perspective of loss aversion, this phenomenon is neither absurd nor completely "irrational". First of all, toilet paper, as a product that is bulky but low-priced and rigid to use, has become a carrier of "symbolic security" in times of crisis. Even if it is not the most urgent survival product, it is the easiest outlet for the expected sense of control.

Secondly, the widespread occurrence of toilet paper panic buying is closely related to the "illusion of control". Faced with the invisibility of the virus and the uncertainty of policy information, people hope to re-establish a sense of order through "what they can do" - and the rush to buy supplies is a concrete manifestation of this sense of control.

Finally, when more and more people in the social circle show off their hoarding achievements, non-participants gradually develop the risk anxiety of "relative deprivation". The sense of loss comes not only from worries about lack of future, but also from the inner unease that "others are better prepared than me" in the present.

Therefore, the rush to buy toilet paper is not an impulse, but the multiple resonances and amplification of collective loss aversion in emergencies.

Media and the moderating role of government information strategy

Although hoarding behavior is motivated by individual psychology, its scale and sustainability are often significantly affected by the external information ecology. The way the media, government, and social platforms express themselves will directly shape the way the public imagines “loss.”

On the one hand, overemphasis on words such as "crisis" and "out of stock" will amplify the sense of loss. For example, although the "Purchase Restriction Notice" is intended to alleviate panic, if it is worded improperly, it will convey the expectation that "the supply of supplies is about to be cut off", thus prompting more people to rush to buy in advance.

On the other hand, clear and rhythmic information dissemination can help control the urge to stock up. Take Singapore as an example. In the early days of the epidemic, Prime Minister Lee Hsien Loong demonstrated a complete material support plan in a televised speech and made a clear commitment to "continue supply without closing the city." At the same time, major supermarkets promised to replenish supplies 24 hours a day. As a result, the local hoarding trend quickly eased.

In addition, the existence of trusted channels is crucial. When government agencies or authoritative media refute rumors in a timely manner, provide data, and even show the actual situation of the supply chain (such as videos of logistics vehicle operations and real scenes of warehouses), the public's expectations of "loss" will be significantly reduced, thereby reducing behavioral impulsivity. This shows that although loss aversion is rooted in human instinct, its intensity and degree of action transformation are highly dependent on the shaping of external information structures.

Beyond loss aversion: other psychological variables in hoarding behavior

Although loss aversion provides a central framework for explaining hoarding behavior, this behavior is also influenced by the interaction of multiple other psychological variables. The following points deserve particular attention:

First, "self-attribution bias" affects individuals' assessment of the consequences of hoarding. Even if many people know that "there is no need to buy so much", they will comfort themselves by saying "I am responsible for my family" and "just in case" to reduce their guilt.

Second, "zero risk preference" becomes particularly prominent during times of crisis. People are more willing to engage in behaviors that completely eliminate future uncertainty, even if such behaviors are not cost-effective in normal times. Stocking up can bring the certainty of "no worst-case scenario", which is an important psychological basis for it to become a mainstream choice.

Third, the decline in “cognitive bandwidth” is also a major driving force. When people are under stress, anxiety, and information overload, their judgment is limited and they tend to rely on intuition or group behavior to make quick decisions. Stocking up on goods is a manifestation of this “cognitive shortcut”.

In summary, although loss aversion provides the underlying psychological explanation for hoarding behavior, only by combining multi-dimensional cognitive biases and environmental stimuli can we fully understand its complex group psychological logic.