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‘Top reviews’ can help sway shoppers, but there are limits

Although featured — or top — reviews on e-commerce sites can help cut down on information overload for customers trying to make purchasing decisions, too many such top reviews can pose an overload of their own, according to researchers.

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Although featured — or top — reviews on e-commerce sites can help cut down on information overload for customers trying to make purchasing decisions, too many such top reviews can pose an overload of their own, according to researchers.

In a study of products and product reviews on online retail giant Amazon, the researchers found that top reviews — which are featured reviews that consumers have endorsed as the most helpful — can lead to higher sales and improved customer satisfaction. However, they added that when there are too many featured reviews, their influence can start to wane.

“We found that there is a situation that when there are too many top reviews, you fall right back into the trap where there is just too much information for the consumer,” said Wael Jabr, assistant professor of supply chain and information systems in the Penn State Smeal College of Business. “In this natural experiment we had some products with just three top reviews and others with significantly more. For products with way more top reviews, we saw the value of those top reviews goes away.”

The researchers used data from about 2.2 million reviews of 1,000 products on Amazon, including all review-related information, such as the overall number of reviews and featured reviews of those products. Sentiment of reviews was determined by the rating the customers gave the product. The researchers also tracked the Amazon sales ranking of the studied products over a 10-month period.

The effectiveness of the top reviews was based on how the performance of individual products changed over time. Specifically, the researchers looked at how the reviews started to disperse in their ratings and how the product sales rank changed. 

The study was published in Management Information Systems Quarterly.

According to Jabr, e-commerce sites chose to feature reviews because popular products tended to attract numerous reviews. The number of reviews for some of these products can be staggering, he added.

“For example, when Amazon put out the Echo Dot smart speaker, more than a million customers reviewed that product within the first four years of its release,” said Jabr. “So, do we need a million reviews to make a good decision on what to buy? Probably not. At a certain point, then, companies started to realize there is an overload that customers will face when we have to navigate this content. Retailers eventually came up with a variety of ways to kind of help you navigate this content, one of which is featuring reviews.”

Sentiment match

The researchers also found that the influence of top reviews is strengthened when their opinions tend to match the overall sentiment of the other reviews.

“When you look at the reviews, Amazon shows you the overall ratings of the reviews — for example, how many people gave it a four-star rating, or, how many people gave it a two or three, etcetera,” said Jabr. “We wondered, then, if the top review effect can be amplified. And it can. We found that when the distribution of top reviews and the distribution of overall reviews match, then the power of top reviews to influence gains strength. It is almost like there is a confirmation when the top reviews match what the crowd is saying.”

The power of top reviews to lift sales and satisfaction is limited, however, said Jabr, who worked with Mohammad Rahman, associate professor of management at the Krannert School of Management at Purdue University. For example, they found that top reviews lack the power to improve the status of less popular products.

The findings could help companies design better webpages while also helping customers make better decisions, said Jabr.

Selling isn’t enough

“Platforms, such as Amazon, are, of course, in the business of selling stuff, but selling stuff alone is not enough,” said Jabr. “Platforms want consumers satisfied with their purchases — and not return those purchases. They also want repeat consumers. In fact, Jeff Bezos himself is quoted saying, ‘We don’t make money when we sell things. We make money when we help consumers make better decisions.’”

The study explores whether there is a certain magic number of reviews as being an optimal amount of top reviews, according to the researchers.

“While the natural experiment does not compare every combination of numbers — for example, two reviews compared to three reviews, or two compared to four — we found that products with three reviews faired better than products with a varying number of reviews ranging from four to 10,” said Jabr. 

In addition to being thoughtful about selecting and displaying top reviews on a webpage, the researchers also suggest that, at a certain point, companies should switch from encouraging customers to review products to asking them to endorse reviews.

“Retailers often default to sending you an email saying, ‘Please rate our product,’ which we think is great,” said Jabr. “But when there are enough reviews, they may want to find a way to nudge the customers to decide on top reviews because that’s going to be much more valuable then writing one more review.”

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5 Trends shaping the future of online selling

The consumer ecommerce market is expected to approach $6 trillion by 2027, according to the International Trade Administration, up from roughly $4 trillion in 2024.

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Thanks to the explosion of ecommerce over the past couple decades, consumers can find virtually any product or service they can think of online. In fact, the consumer ecommerce market is expected to approach $6 trillion by 2027, according to the International Trade Administration, up from roughly $4 trillion in 2024.

A diverse collection of product segments is driving this growth, including everything from fashion and furniture to food and beverage. While major marketplace retailers still lead the category, ecommerce has become commonplace among small businesses, too. In fact, by the end of 2023, an estimated 80% of small businesses had at least basic ecommerce capabilities, according to a report by Digital Commerce 360.

However, small businesses are grappling with challenges such as inflation, supply chain issues and keeping pace with major retailers, among others, that are driving a variety of ecommerce trends in 2025 and beyond, including:

Video Content

Spurred by social media, video content is in high demand on ecommerce sites, too. Videos that explain how to use products, offer tips for using them and demonstrate projects that were completed using a product all earn favor with shoppers. In addition, videos that highlight product features, video reviews on social media and “live shopping events” on the social channels of ecommerce retailers can provide a more appealing interactive experience for shoppers.

Inclusive of the “live shopping events” trends, livestreaming is often popular among consumers as it can create a sense of FOMO (fear of missing out), leading to enhanced brand loyalty and engagement. Short-form videos sweeping social media also drive engagements and offer a quick, appealing way to demonstrate new or popular products.

Personalized Products

Ecommerce provides opportunities for shoppers who appreciate buying products that are uniquely their own. Online buying platforms that allow for customization of products such as shoes, clothing and drinkware can create buyer engagement and earn loyal shoppers who know they can purchase the items they want exactly to their own specifications.

In fact, a survey by McKinsey Insights found 80% of loyal customers prefer shopping with brands that offer tailored choices and personalized experiences. From color selection and accessories to performance variations, custom options can help create a highly personalized shopping experience that allow buyers to interact more directly than they would for a standardized transaction.

Beyond the initial purchase, customized reports and shipping notifications are also becoming the norm. Shippers can alert customers to their products’ delivery status – including any delays or changes – via email, text, video message or, in some cases, a customizable dashboard where consumers can view incoming shipments tied to their account or address, request a different delivery time or location, pre-sign for packages and more.

Micro Purchasing Moments

You may think phenomena like impulse buys or convenience purchases are reserved for brick-and-mortar stores, but micro-purchasing trends suggest otherwise. These purchases are typically made by someone looking for a quick solution or information in a hurry from a mobile device, such as comparing two or more similar products and clicking a “buy now” link, ordering and paying for food ahead of time to skip the line, making a hotel or excursion reservation while traveling or looking up movie showtimes and purchasing tickets from the same page. Ecommerce sites that can establish themselves as a resource, make information easy to digest and simplify the purchasing process are earning customers (and revenue).

Flexible Payment Options

Online purchases were once limited almost exclusively to credit card purchases, but over time, businesses have granted greater flexibility to shoppers when it comes to collecting payment. While this trend has been growing for several years, many contemporary ecommerce sites now accept credit or debit cards, online checks, digital wallet and mobile payment services, cryptocurrency and even installment payments via third-party providers. By 2029, the third-party payment market is expected to almost double from $62.5 billion in 2024, according to findings from Mordor Intelligence.

Simplified Shipping Options

Evolving technology isn’t just improving the browsing and purchasing side of ecommerce; shipping operations are also seeing enhancements. For example, ShipAccel, a digital platform designed by Pitney Bowes, simplifies and enhances shipping operations with advanced ecommerce technology. The platform empowers early ecommerce brands to ship like larger companies with access to discounted carrier rates; more than 80 integrations including leading marketplaces, data and insights to help make smarter shipping decisions; branded tracking; and return capabilities. It features a collection of apps, widgets and application programming interfaces to easily configure new workflows and seamlessly meet the demands of business growth.

“As ecommerce becomes a mainstay, shippers must take a technology-first approach, utilizing platforms that can grow along with the business and partnering with providers who offer deep expertise in the segment,” said Shemin Nurmohamed, president of Sending Technology Solutions at Pitney Bowes. “As a result of using technology like ShipAccel, ecommerce shippers can save money, enhance operational efficiencies and delight customers – all of which support the business’ bottom line.”

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‘Jekyll and Hyde’ leaders do lasting damage, new research shows

In today’s workplaces, employees are very attuned to their supervisors’ relationships with more senior leaders. If that relationship becomes unpredictable, or is marked by repeated bouts of good and bad behavior, it can cause real problems for the whole team.

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There’s only one thing worse than an abusive boss—and that’s a boss who thinks they can make up for their bad behavior by turning on the charm the following day. That’s the key finding from a new study from researchers at Stevens Institute of Technology, which shows that employees’ morale and job performance decline sharply when leaders lurch unpredictably between good and bad behavior. 

“We already know that abusive leadership takes a serious toll on workers—but now we’re seeing that leaders who swing back and forth between abusive and ethical leadership do even more damage to employees,” says Dr. Haoying Xu, the study’s lead author and an assistant professor of management in the Stevens School of Business. “It turns out that reverting to an ethical leadership style doesn’t magically erase the impact of prior bad behavior—and in some circumstances, it can actually make things worse.”  

The research, published in the Journal of Applied Psychology, used surveys and field experiments to examine the impact of “Jekyll-and-Hyde” leadership on more than 650 full-time employees based in the United States and Europe. Dr. Xu’s team confirmed that the workers struggled when their supervisors were abusive—but found an even stronger negative impact when supervisors alternated unpredictably between abusive and ethical leadership styles.

“If you’re constantly guessing which boss will turn up—the good cop or the bad cop—then you wind up emotionally exhausted, demoralized, and unable to work to your full potential,” Dr. Xu explains. 

The new research also shows for the first time that “Jekyll-and-Hyde” leadership can take a serious toll even when employees aren’t directly impacted by a leader’s on-again, off-again misbehavior. When a supervisor’s own boss alternated between abusive and ethical leadership, the study found, it created additional uncertainty and eroded employees’ confidence in the supervisor’s capabilities.

“In today’s workplaces, employees are very attuned to their supervisors’ relationships with more senior leaders,” Dr. Xu says. “If that relationship becomes unpredictable, or is marked by repeated bouts of good and bad behavior, it can cause real problems for the whole team.” 

For organizations, the research offers some important new insights—most notably the fact that leaders who seek to atone for intermittent bad behavior are often doing real harm to their employees. “Organizations tend to intervene when bosses are consistently abusive, but are more tolerant of leaders whose abusive behavior only shows through from time to time,” Dr. Xu says. “With this study, however, we’ve shown that intermittent bad behavior can actually be more toxic for organizations.” 

To counter Jekyll-and-Hyde leadership, Dr. Xu says, organizations should pay attention to employees who voice concerns, and hold leaders accountable for sporadic abusive behavior. It’s also worth considering anger management coaching for leaders who show signs of volatility. “This kind of intermittent abusive leadership tends to be impulsive,” Dr. Xu says. “That means there’s scope to reduce or eliminate it by helping leaders to manage their tempers and improve their impulse control.” 

In future research, Dr. Xu hopes to explore how employees respond to and learn from Jekyll-and-Hyde leadership, and how a leader’s periodic abusive behavior impacts individual behavior and team dynamics. “There are some indications that this kind of leadership could be contagious, with a leader’s volatility fostering volatility in others,” he says. 

There is also some intriguing early evidence that employees might learn from and emulate a leader’s bad behavior more than they replicate their good behavior. “If that’s the case, then it would be another big reason for organizations to take Jekyll-and-Hyde leadership seriously,” Dr. Xu warns.

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Not all ‘review bombing’ is bad for business

Having a one-size-fits-all, review bombing or political speech policy can lead to the suppression of legitimate expressions of support for the role a small business plays in the community.

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For a business on the receiving end of “review bombs” – the sudden influx of online customer reviews following a political or cultural controversy – an interventionist approach to content moderation might seem like a prudent strategy.

But a new open-access study by a Rutgers researcher finds that when review platforms such as Yelp enact tough moderation policies in a bid to sanitize political speech, it can unnecessarily constrain reasonable opinions and cultural context that consumers depend on to decide where to spend their money.

“Simply put, everything you think you know about review bombing is wrong,” said Will B. Payne, assistant professor of geographic information science at Rutgers’ Edward J. Bloustein School of Planning and Public Policy and author of the study, published in the journal Big Data & Society.

Online reviews can have a significant impact on an independent business’s revenue, particularly those on Yelp, the leading local review platform in the United States. One study found that a one-star increase in the average Yelp rating causes a 5% to 9% increase in revenue for nonchain restaurants.

To understand the geographic reach of review bombing incidents and how platforms define acceptable speech, Payne assessed Yelp’s moderation of comments on U.S. businesses embroiled in political controversies between 2004 and 2021. 

First, Payne created a database of businesses affected by national and local politics. Using news sources to identify specific cases and date ranges, he built a dataset of tens of thousands of political-themed reviews. Topics included the 2016 and 2020 U.S. elections, the Black Lives Matter and #MeToo movements and the COVID-19 pandemic.

Next, he analyzed Yelp’s publicly available metadata for reviews of affected businesses, including review date, username, star rating and user location.

Payne then selected two businesses with large numbers of Yelp reviews for in-depth analysis: Washington, D.C.-based pizzeria Comet Ping Pong (subject of the Pizzagate conspiracy theory in 2016) and St. Louis-based Pi Pizzeria, whose owner, Chris Sommers, became the target of online and offline harassment by pro-police supporters after he publicly backed the Black Lives Matter movement in 2017.

In Comet Ping Pong’s case, Payne found that review bombing resulted in primarily negative comments by reviewers mostly on the West Coast – thousands of miles away from the restaurant – while Pi Pizzeria experienced a much more local pattern (largely from the St. Louis area), with an even split of supporters and detractors.

Payne found that Yelp’s automated and human review filtering systems largely responded the same way to each incident, but with considerably different effects. For Comet Ping Pong, of the 283 reviews flagged and removed by Yelp, 229 were negative one-star reviews. By contrast, of the 588 Pi Pizzeria reviews that Yelp removed, most were in support of Sommers’ actions, positive reviews that averaged close to the restaurant’s four-star rating of Yelp-approved reviews.

“Local customers were censored for simply thanking Chris Sommers for standing with them as they marched against police violence,” Payne said. “They weren’t fake reviews about a conspiracy theory; they were legitimate statements by people supporting a business, in this case for the support its owner gave to the neighborhood.”

Payne also looked at Google’s approach to content moderation and found that unlike Yelp, Google rarely removes politically themed reviews. This, too, can be a double-edged sword; Comet Ping Pong still has dozens of public Google reviews referencing the false Pizzagate conspiracy. 

The data does have several limitations, Payne said. First is the possibility that the self-reported location of Yelp users was inaccurate, or that some users could have moved between the time they set up their Yelp profile and when they wrote a review.

Additionally, reviews on Google Maps – a popular Yelp competitor – don’t contain user location information and can be removed by Google without leaving the public metadata traces that Yelp provides for transparency.

As review bombing continues to test review platforms’ approaches to political discourse – the most recent example surfaced this month, when Yelp halted reviews of a McDonald’s franchise in Feasterville, Penn., where former President Donald J. Trump had held a campaign event – Payne said it’s worth considering whether content moderation has gone too far.

The question is particularly relevant for Yelp, which has used corporate communications and review search filters to support Black-owned, women-owned, and LGBTQ-inclusive businesses – speech that isn’t permitted by reviewers themselves unless accompanying a customer experience review.

“Having a one-size-fits-all, review bombing or political speech policy can lead to the suppression of legitimate expressions of support for the role a small business plays in the community, as in the case of Pi Pizzeria,” Payne said. “Some might disagree that the political positions of a business owner should guide consumer behavior, but on Yelp, it’s a choice that users can’t even make for themselves.”

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