Why shoppers are paying more for a fake Amazon discount

May 9, 2023

2 min

By Halle Burton


According to new research by Jinhong Xie, a Warrington College of Business professor at the University of Florida, more than a quarter of Amazon vacuum cleaners sold have increased their prices while pretending to offer discounts.


Xie’s pricing phenomenon research is joined with Sungsik Park at the University of South Carolina and Man Xie at Arizona State University, publishing their analysis in the Marketing Science journal.


A product’s price increase is paired with a previously unadvertised listing price, which encourages Amazon shoppers to receive a deceitful false discount.


This faux discount drove higher sales despite the price increase, and shoppers end up paying 23% more on average.


“When you see this list-price comparison, you naturally assume you are getting a discount. It’s not just that you didn’t get a discount. You actually paid a higher price than before the seller displayed the discount claim,” said Xie.


Regulations currently prohibit deceptive pricing by requiring truthful price comparisons from the sellers, but a list price can still be misleading under these circumstances.


Shoppers are misled by the timing of price comparisons where retailers advertise a price discount that actually only gives the impression of a deal.


“Current regulations are all about the value of the list price, and they don’t say anything about misleading consumers by manipulating the timing of the list price’s introduction,” Xie said.


Xie and her colleagues followed more than 1,700 vacuums on Amazon from 2016 to 2017 gathering observational data on their prices.


“We found that by increasing the price by 23% on average, the seller achieves a 15% advantage in their sales rank among all products in the home and kitchen category,” Xie said.


Xie encourages consumers to be aware, not make assumptions about discount claims and utilize multiple websites to compare prices.


“We think that consumer organizations and regulators should evaluate this new marketing practice to determine whether and how to manage it.”

Powered by

You might also like...

Check out some other posts from University of Florida

4 min

The health challenges astronauts Butch Wilmore and Suni Williams face after 9 months in space

On June 5, 2024, astronauts Butch Wilmore and Suni Williams embarked on a brief mission to the International Space Station. But equipment failures turned what was supposed to be an eight-day trip into a grueling 9 month spaceflight. This week, Wilmore and Williams finally returned to Earth. While their safe return is cause for celebration, the journey doesn’t end when astronauts touch down on Earth. They now face the significant task of recovering from the physical and psychological toll of long-duration spaceflight. As part of the University of Florida’s ongoing research into astronaut health, Rachael Seidler, Ph.D., a leading expert in spaceflight-associated health changes, is studying the long-term effects of space travel on astronauts’ brains and bodies. Seidler’s research focuses on understanding how the central nervous system and brain structure adapt to the challenges of space travel, as well as how these changes affect performance, balance, and mobility once astronauts return to Earth. “While the physical and psychological challenges astronauts face after returning from long-duration space missions are well-documented, the research we do at UF is helping us understand the intricacies of their recovery process,” said Seidler, deputy director of the Astraeus Space Institute at UF. “By following astronauts like Butch and Suni before, during, and after their missions, we can track how the human body responds to the extreme conditions of space.” Behavioral and Brain Changes Post-Flight Seidler’s research tracks astronauts’ physical and neurological recovery by observing them both during their missions and after they return. "One of the most immediate challenges astronauts face when they return to Earth is mobility and balance. These issues often recover more quickly compared to others, but it takes time for astronauts to readjust to gravity,” Seidler said. "The balance, mobility, and walking difficulties astronauts experience during the first weeks back are typically resolved in a short period, but brain function and structure require longer recovery periods." Seidler’s research indicates that astronauts’ brains exhibit compensation when they return to Earth following spaceflight. This compensation occurs through the recruitment of additional neural pathways in order to return to their preflight performance levels. However, the recovery of brain function is a gradual process. "This brain functional compensation is typically no longer observed within one to six months post-flight," Seidler said. However, not all changes are reversible. "Brain structural changes, particularly related to fluid shifts in space, show little to no recovery even after six months to a year," Seidler said. Two significant structural changes include the brain physically sitting higher in the skull and the expansion of the brain’s ventricles — fluid-filled cavities in the brain — which can increase in volume by 25% or more. These changes are thought to result from the fluid shifts caused by microgravity, and they present long-term health considerations for astronauts. Long-Term Health Effects: Understanding the Impact As Wilmore and Williams embark on their recovery journey, the long-term impact of these changes becomes a critical focus for researchers like Seidler. "The long-term health impacts are crucial to understand because they could affect how astronauts recover and perform in their daily lives post-mission," she said. Seidler’s team at UF is conducting a new study in which they are tracking astronauts for up to five years post-flight to better understand these long-term effects. "We’ve had astronauts in space for up to a year, and we know how to manage their physical health during those missions," Seidler said. "But the effects of space on the brain and body extend beyond the mission, and our work helps inform strategies to manage recovery." Collaborating with NASA and Studying Spaceflight-Associated Neuro-Ocular Syndrome Seidler's work is also part of a broader collaboration with NASA and other scientists to assess astronaut long-term health. The project is particularly focused on Spaceflight-Associated Neuro-Ocular Syndrome, which affects up to 70% of astronauts. This condition involves structural changes to the eye and optic nerve, leading to vision problems that may impact astronauts’ function. "Neuropsychological assessments can help to measure astronauts’ brain health, while studies of the ocular system help identify potential vision issues that may arise during and after long-duration space missions," she said. Simulating Space Conditions on Earth In addition to studying astronauts on Earth and in space, Seidler’s team conducts experiments to simulate the effects of spaceflight on human physiology. The UF lab runs experiments in head-down tilt bed rest studies, which keep participants lying down for weeks to months at a time to simulate the lack of gravity. "This type of study helps us understand how fluid shifts in the body during space travel affect mobility, balance, and brain structure," Seidler explained. "In addition, other publications have reported that astronauts describe that vestibular galvanic stimulation feels similar to what they experience when they first arrive in space and when they return to Earth. We have equipment to induce these effects in the lab." Looking Toward the Future As space missions continue to grow longer and more complex, UF’s research is more important than ever. "We’re studying these issues now to ensure that future astronauts are prepared for the physical and cognitive challenges that await them in deep space," Seidler said.

2 min

Researchers work to reduce excessive noise in Florida cities

Excessive noise, or noise pollution, in cities has been linked in multiple studies to increased stress, sleep disturbances, and long-term health problems. Researchers from the University of Florida are on a mission to quiet things down, working with local governments and a private firm to improve both public health and urban living. Enter Martin Gold, an associate professor from UF’s School of Architecture, and his team of students. They recently partnered with Siebein Acoustic, a soundscape design firm that specializes in architectural and environmental acoustics. The team visited Fort Lauderdale, one of Florida’s busiest cities, known both as a party destination and a mecca for retirees. The team studied areas throughout downtown and by the beach to provide recommendations for reducing the impact of sound in the city at large. To inform their work, researchers recruited participants to walk the city and report on their observations about sound and sights, took photo documentation, acoustic measurements, geographical measurements and analyzed municipal code studies. The team proposed different improvement strategies including: Using vertical distance by requiring residential high-rise construction to limit residences in the lower floors of buildings. Limiting sound levels at windows or balconies of residential units. Building envelope systems, which are the building components that separate the indoors from the outdoors, that limit sound transmission and absorb sound. Designing new construction so buildings absorb and diffuse the sounds striking them rather than reflecting and subsequently amplifying the sounds or focusing the sounds in particular areas. Strategic zoning to incentivize designs along arterial corridors that fill the sites and provide acoustic barriers to the residential neighborhoods behind them. “We need to take a closer look at how we are designing the next generation of urban environments. There’s a lot we can do with soundscape architecture to positively impact issues moving forward.” —Martin Gold, associate professor from UF’s School of Architecture The findings and recommendations were presented at the International Congress and Exposition on Noise Control Engineering in Nantes, France. Gold and his students are currently surveying an area of Clearwater and plan to study more cities around the state and offer recommendations for reducing noise.

3 min

AI-driven software is 96% accurate at diagnosing Parkinson's

Existing research indicates that the accuracy of a Parkinson’s disease diagnosis hovers between 55% and 78% in the first five years of assessment. That’s partly because Parkinson’s sibling movement disorders share similarities, sometimes making a definitive diagnosis initially difficult. Although Parkinson’s disease is a well-recognized illness, the term can refer to a variety of conditions, ranging from idiopathic Parkinson’s, the most common type, to other movement disorders like multiple system atrophy Parkinsonian variant and progressive supranuclear palsy. Each shares motor and nonmotor features, like changes in gait — but possess a distinct pathology and prognosis. Roughly one in four patients, or even one in two patients, is misdiagnosed. Now, researchers at the University of Florida and the UF Health Norman Fixel Institute for Neurological Diseases have developed a new kind of software that will help clinicians differentially diagnose Parkinson’s disease and related conditions, reducing diagnostic time and increasing precision beyond 96%. The study was published recently in JAMA Neurology and was funded by the National Institutes of Health. “In many cases, MRI manufacturers don’t communicate with each other due to marketplace competition,” said David Vaillancourt, Ph.D., chair and a professor in the UF Department of Applied Physiology and Kinesiology. “They all have their own software and their own sequences. Here, we’ve developed novel software that works across all of them.” Although there is no substitute for the human element of diagnosis, even the most experienced physicians who specialize in movement disorder diagnoses can benefit from a tool to increase diagnostic efficacy between different disorders, Vaillancourt said. The software, Automated Imaging Differentiation for Parkinsonism, or AIDP, is an automated MRI processing and machine learning software that features a noninvasive biomarker technique. Using diffusion-weighted MRI, which measures how water molecules diffuse in the brain, the team can identify where neurodegeneration is occurring. Then, the machine learning algorithm, rigorously tested against in-person clinic diagnoses, analyzes the brain scan and provides the clinician with the results, indicating one of the different types of Parkinson’s. The study was conducted across 21 sites, 19 of them in the United States and two in Canada. “This is an instance where the innovation between technology and artificial intelligence has been proven to enhance diagnostic precision, allowing us the opportunity to further improve treatment for patients with Parkinson’s disease,” said Michael Okun, M.D., medical adviser to the Parkinson’s Foundation and director of the Norman Fixel Institute for Neurological Diseases at UF Health. “We look forward to seeing how this innovation can further impact the Parkinson’s community and advance our shared goal of better outcomes for all.” The team’s next step is obtaining approval from the U.S. Food and Drug Administration. “This effort truly highlights the importance of interdisciplinary collaboration,” said Angelos Barmpoutis, Ph.D., a professor at the Digital Worlds Institute at UF. “Thanks to the combined medical expertise, scientific expertise and technological expertise, we were able to accomplish a goal that will change the lives of countless individuals.” Vaillancourt and Barmpoutis are partial owners of a company called Neuropacs whose goal is to bring this software forward, improving both patient care and clinical trials where it might be used.

View all posts