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Information Systems Research (2025) AI Processed Human Approved
Can Regulation Restore Authenticity? Evidence from Policies Against Online Review Suppression
This study evaluates the impact of the Consumer Review Fairness Act (CRFA), a federal U.S. law designed to prevent businesses from using legal threats to suppress negative online feedback. Employing a difference-in-differences design on data from TripAdvisor and Google Places, the authors examine shifts in review valence, sentiment, and length following the regulation.
Problem
Businesses increasingly suppress negative online reviews through legal threats and non-disparagement clauses, severely biasing consumer perceptions and creating a chilling effect among reviewers. Despite increasing policy responses, empirical evidence on whether regulations effectively curb review suppression and restore rating authenticity has been lacking.
Outcome
- Following the CRFA enactment, U.S. hotel reviews became systematically more negative in both star ratings and textual sentiment.
- Reviews became significantly longer on average, indicating that consumers shared more detailed feedback once legal risks were mitigated.
- Rating declines were most concentrated among less reputable hotels and those in highly competitive local markets, which previously suppressed negative reviews more aggressively.
- The policy's effects were strongest among American reviewers and users with longer platform tenure.
- Reviews became significantly longer on average, indicating that consumers shared more detailed feedback once legal risks were mitigated.
- Rating declines were most concentrated among less reputable hotels and those in highly competitive local markets, which previously suppressed negative reviews more aggressively.
- The policy's effects were strongest among American reviewers and users with longer platform tenure.
What it means for you
- CIO / IT Executive: On Monday morning, initiate a review of our internal policies and legal contracts to ensure no clauses inadvertently threaten or discourage customers from providing honest feedback on public review platforms.
- IT Manager: On Monday morning, task your team with monitoring online review platforms for any patterns of review suppression tactics being used by our competitors, specifically looking for increases in negative reviews that are quickly removed or challenged.
- Business Strategist: On Monday morning, analyze recent customer feedback data, particularly any negative reviews received in the last quarter, and assess if there are opportunities to engage with these customers to improve our offerings and address concerns openly.
- Researcher: On Monday morning, identify and gather publicly available datasets on consumer review sentiment and volume for companies in sectors known for aggressive review suppression prior to recent regulatory changes, to replicate or extend the findings on the CRFA.
- Policymaker: On Monday morning, schedule a meeting with your legislative staff to discuss potential avenues for expanding regulatory protections to cover other forms of consumer feedback, such as social media comments or product testimonials, building upon the success of the CRFA.
Transcript
Host: Welcome to A.I.S. Insights — powered by Living Knowledge. I'm Anna Ivy Summers. Today, we're diving into an eye-opening study titled "Can Regulation Restore Authenticity? Evidence from Policies Against Online Review Suppression." We'll be exploring whether legal regulations can actually prevent companies from hiding bad reviews and help bring transparency back to online platforms. Joining me to unpack this is our lead analyst, Alex Ian Sutherland. Welcome, Alex!
Expert: Thanks, Anna. It's great to be here. This study tackles a really critical issue for anyone who relies on online ratings to make purchasing decisions.
Host: So, Alex, let's start with the core problem. We all know companies buy fake positive reviews, but this study looks at the flip side—how businesses actively suppress real negative reviews. How big of an issue is this?
Expert: It's a huge issue, Anna. While fake positive reviews inject noise into ratings, removing truthful negative feedback completely erases vital information. Businesses have historically used non-disparagement clauses, often called "gag clauses," or outright legal threats of defamation lawsuits to intimidate customers into deleting critical posts. In the study, the researchers found that negative reviews were 26% more likely to be deleted within six months compared to positive ones. Even worse, receiving a legal threat creates a "chilling effect," where threatened consumers start posting artificially positive feedback elsewhere just to avoid legal fallout.
Host: That is alarming. So to combat this, the U.S. enacted the Consumer Review Fairness Act, or CRFA, in late 2016. How did the authors set out to test if this legislation actually worked?
Expert: The researchers analyzed a massive dataset of over two million English-language hotel reviews from TripAdvisor, spanning multiple years before and after the CRFA was enacted. To prove causality, they used a difference-in-differences approach, comparing U.S. hotels affected by the new federal law against a matched control group of similar international hotels that were unaffected by U.S. legislation. They also validated their findings using Google Places review data and state-level repeals of criminal defamation laws.
Host: That sounds like a robust setup. So, what did the study reveal once the CRFA outlawed these gag clauses and legal threats?
Expert: The results were clear: after the CRFA took effect, U.S. hotel ratings became systematically more negative and critical. Average star ratings fell by about 0.05 stars, and textual sentiment scores dropped measurably. On top of that, reviews became significantly longer on average. Once the fear of legal retaliation was lifted, consumers felt empowered to share more detailed, candid accounts of their bad experiences.
Host: Did all hotels experience this shift equally, or were certain types of businesses impacted more than others?
Expert: That's one of the most interesting parts of the study. The drop in ratings was most concentrated among less reputable hotels—those with lower historical average ratings—and hotels operating in highly competitive local markets. This tells us that lower-quality hotels and those desperate to stand out among nearby competitors were the ones most heavily engaged in suppressing negative reviews prior to the law.
Host: And what about the reviewers themselves? Who responded the most to the legal protection?
Expert: The policy's positive effects were strongest among American reviewers and experienced users with longer tenure on the platform. Seasoned reviewers, who were more likely to be aware of legal threats or platform rules, responded immediately once they knew the law protected their right to voice honest opinions.
Host: This has major implications for both consumers and business leaders. What are the key business takeaways here?
Expert: For business leaders, the message is clear: relying on aggressive legal tactics or gag clauses to protect your reputation is no longer a viable strategy. When regulations protect consumer speech, suppression tactics fail, and underlying quality issues inevitably come to light. For platform managers and policymakers, this study proves that legal intervention actually works. By removing legal barriers, you restore authenticity, increase information richness, and build greater long-term trust in digital marketplaces.
Host: That really highlights how crucial legal safeguards are for maintaining trust in the digital economy. Alex, thank you so much for breaking down this fascinating study for us today.
Expert: My pleasure, Anna.
Host: And thank you to our listeners for tuning in to A.I.S. Insights — powered by Living Knowledge. Be sure to subscribe for more deep dives into the latest business and technology research. See you next time!
Expert: Thanks, Anna. It's great to be here. This study tackles a really critical issue for anyone who relies on online ratings to make purchasing decisions.
Host: So, Alex, let's start with the core problem. We all know companies buy fake positive reviews, but this study looks at the flip side—how businesses actively suppress real negative reviews. How big of an issue is this?
Expert: It's a huge issue, Anna. While fake positive reviews inject noise into ratings, removing truthful negative feedback completely erases vital information. Businesses have historically used non-disparagement clauses, often called "gag clauses," or outright legal threats of defamation lawsuits to intimidate customers into deleting critical posts. In the study, the researchers found that negative reviews were 26% more likely to be deleted within six months compared to positive ones. Even worse, receiving a legal threat creates a "chilling effect," where threatened consumers start posting artificially positive feedback elsewhere just to avoid legal fallout.
Host: That is alarming. So to combat this, the U.S. enacted the Consumer Review Fairness Act, or CRFA, in late 2016. How did the authors set out to test if this legislation actually worked?
Expert: The researchers analyzed a massive dataset of over two million English-language hotel reviews from TripAdvisor, spanning multiple years before and after the CRFA was enacted. To prove causality, they used a difference-in-differences approach, comparing U.S. hotels affected by the new federal law against a matched control group of similar international hotels that were unaffected by U.S. legislation. They also validated their findings using Google Places review data and state-level repeals of criminal defamation laws.
Host: That sounds like a robust setup. So, what did the study reveal once the CRFA outlawed these gag clauses and legal threats?
Expert: The results were clear: after the CRFA took effect, U.S. hotel ratings became systematically more negative and critical. Average star ratings fell by about 0.05 stars, and textual sentiment scores dropped measurably. On top of that, reviews became significantly longer on average. Once the fear of legal retaliation was lifted, consumers felt empowered to share more detailed, candid accounts of their bad experiences.
Host: Did all hotels experience this shift equally, or were certain types of businesses impacted more than others?
Expert: That's one of the most interesting parts of the study. The drop in ratings was most concentrated among less reputable hotels—those with lower historical average ratings—and hotels operating in highly competitive local markets. This tells us that lower-quality hotels and those desperate to stand out among nearby competitors were the ones most heavily engaged in suppressing negative reviews prior to the law.
Host: And what about the reviewers themselves? Who responded the most to the legal protection?
Expert: The policy's positive effects were strongest among American reviewers and experienced users with longer tenure on the platform. Seasoned reviewers, who were more likely to be aware of legal threats or platform rules, responded immediately once they knew the law protected their right to voice honest opinions.
Host: This has major implications for both consumers and business leaders. What are the key business takeaways here?
Expert: For business leaders, the message is clear: relying on aggressive legal tactics or gag clauses to protect your reputation is no longer a viable strategy. When regulations protect consumer speech, suppression tactics fail, and underlying quality issues inevitably come to light. For platform managers and policymakers, this study proves that legal intervention actually works. By removing legal barriers, you restore authenticity, increase information richness, and build greater long-term trust in digital marketplaces.
Host: That really highlights how crucial legal safeguards are for maintaining trust in the digital economy. Alex, thank you so much for breaking down this fascinating study for us today.
Expert: My pleasure, Anna.
Host: And thank you to our listeners for tuning in to A.I.S. Insights — powered by Living Knowledge. Be sure to subscribe for more deep dives into the latest business and technology research. See you next time!