The Fifth Risk: Undoing Democracy
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From Michael Lewis
Refresh the report to view the most up-to-date data available:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Top products in Politics & Government with authentic reviews:
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Most Trusted Reviews
TRUST
- Verified Purchaser
- Take-Back Reviewer (7 deleted Reviews; avg. rating: 4.1)
- Critical Reviewer (avg. rating: 3.3)
Least Trusted Reviews
TRUST
- Verified Purchaser
- Created on a high volume day
- Overrepresented word count (26 words)
- Take-Back Reviewer (2 deleted Reviews; avg. rating: 3.5)
- Brand Repeater (2 of 27 reviews for this brand; avg rating: 5.0)
- Overlapping Review History: reviewed 1 of 9 top products
- Critical Reviewer (avg. rating: 3.6)
Analysis Details
Never-Verified Reviewers
63 of the 1,537 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.6 while the reviewers who have written at least one verified purchase review rated this product an average of 4.4. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Take-Back Reviewers
470 of the 1,537 reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 4.4 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
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- 21%
- Have an overrepresented word count
In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 1 group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 327 reviews (or 21%) are within an overrepresented word count group. These reviews have rated this product an average of 4.5, while all other reviews have rated this product an average of 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
(4.2/5)
(4.7/5)
(4.3/5)
(4.3/5)
(4.5/5)
(4.8/5)
(4.1/5)
(4.3/5)
(4.2/5)
(4.3/5)
234 of the 1,537 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.5 while reviews without substantial repetitive phrases rated this product an average of 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
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- 14%
- Created over 23 days
We counted 1,537 reviews for this product over the span of 922 days, an average of 1.7 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 7 or fewer reviews on any given day.
However, we see the following 23 days exceeding this threshold:In total, we found that 219 reviews were created on just 23 days. Although any days with a larger number of reviews than expected is suspicious, these reviews do not appear to have a significant impact on the overall rating.
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- 36%
- From reviewers with an overrepresented participation
We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 546 reviewers (or 36%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, the discrepancy in ratings between reviewers in an overrepresented participation groups and all other reviewers isn’t significant enough to rule out the possibility of it being due to random chance.
476 of the 1,537 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
5% also reviewed:
Fear: Trump in the White House by Woodward, Bob
4% also reviewed:
Hillbilly Elegy: A Memoir of a Family and Culture... by J. D. Vance
4% also reviewed:
The Undoing Project: A Friendship That Changed... by Michael Lewis
3% also reviewed:
Flash Boys: A Wall Street Revolt by Michael Lewis
3% also reviewed:
Sapiens: THE MULTI-MILLION COPY BESTSELLER by Yuval Noah Harari
3% also reviewed:
Fire and Fury: Inside the Trump White House by Michael Wolff
3% also reviewed:
A Higher Loyalty: Truth, Lies, and Leadership by James Comey
3% also reviewed:
On Tyranny: Twenty Lessons from the Twentieth... by Timothy Snyder
3% also reviewed:
Bad Blood: Secrets and Lies in a Silicon Valley... by John Carreyrou
302 of the 1,537 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
4.2 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Brand Repeaters
93 of the 1,537 reviewers have reviewed other products for this brand. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
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- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
- 0
- Reviews have been deleted
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.