Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Human rational and irrational buying behavior is mirrored in monkeys


The basic economic theory that people work harder to avoid losing money than they do to make money is shared by monkeys, suggesting this trait has a long evolutionary history, according to a Yale University study under review by the Journal of Political Economy.

This phenomenon, known as "loss aversion," refers to the tendency for people to strongly prefer avoiding losses to acquiring gains. "A large body of studies suggest that losses are more than twice as psychologically powerful as gains," said author M. Keith Chen, assistant professor at Yale School of Management.

In this study conducted with Venkat Lakshminaryanan, a research assistant in the Department of Psychology, and Laurie Santos, assistant psychology professor and director of the Capuchin Cognition Laboratory at Yale, tufted capuchin monkeys were given small disks to trade for rewards--apples, grapes or gelatin cubes. The researchers said capuchins are well-suited subjects for study since they are relatively large-brained primates, skilled problem solvers, and a close evolutionary neighbor to humans.

In their studies monkeys were given a budget of disks and asked to decide how much to spend on apples, and how much to spend on the gelatin cubes, even as the prices of these goods and the size of their budgets fluctuated. Capuchins performed much like humans do. Capuchins, like humans, react rationally to these fluctuations.

In a second experiment, capuchins were asked to choose between spending a token on one visible piece of food that half the time gave a return of two pieces, or two pieces of visible food, that half the time gave a return of only one piece. Economic theory predicts that consumers should not care which of these outcomes they receive since they are essentially both 50-50 shots at one or two pieces of food. The capuchins, however, vastly preferred the first gamble, which is essentially a half chance at a bonus, than the second gamble, which is essentially a half chance at a loss.

"The goal of this work," said Santos, "is to learn whether other animals share some of our basic economic decision processes or whether human economic behavior is unique to our own species."

"The economic view," Chen added, "says people are aware, rational and in control of their major decisions. Social psychology cuts in the opposite direction, maintaining that people are often unaware of the forces that dictate their behavior. We wanted to understand the interactions of these two things. What we’ve shown is that capuchin monkeys look remarkably like us; making rational decisions in many of the same settings that humans get right, but also make many of the same mistakes we make."

Their work provides an evolutionary spin on the current debate about why Americans do not save enough for retirement or put enough of their savings into the stock market. "Although the stock market offers a better rate of return than investing in safer financial products, such as bonds, people tend to experience stock market fluctuations through the biased lens of loss aversion, a lens that appears to be shared with other primates," Santos said. Chen added, "We are fighting tendencies that may be biologically hard-wired."

Jacqueline Weaver | EurekAlert!
Further information:

More articles from Life Sciences:

07.12.2016 | National Centre for Biological Sciences

nachricht Transforming plant cells from generalists to specialists
07.12.2016 | Duke University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>


Im Focus: Significantly more productivity in USP lasers



Im Focus: Shape matters when light meets atom






Im Focus: Quantum Particles Form Droplets






All Focus news of the innovation-report >>>



Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News


14.10.2016 | Event News

Latest News

NTU scientists build new ultrasound device using 3-D printing technology

07.12.2016 | Health and Medicine

The balancing act: An enzyme that links endocytosis to membrane recycling

07.12.2016 | Life Sciences

How to turn white fat brown

07.12.2016 | Health and Medicine

More VideoLinks >>>