B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
80%
80% -- share of customer reviews from post purchase emails for customer reviews (2025)
According to a Northwestern study, 80% of customer reviews come from post-purchase emails.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
80%
Unit
Percentage
Data Vintage
2025
Entity
Geography
Global
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Northwestern University
Primary
Tier C
https://www.mara-solutions.com/post/boost-your-ratings-strategies-for-getting-more-tripadvisor-revie… ↗
Source Article
Boost Your Ratings: Strategies for Getting More TripAdvisor Reviews
Why you should actively ask your guests for Tripadvisor reviews
Let’s get one thing straight to the point: Online reviews are crucial for your business. In fact, 9 out of 10 of travelers consider reviews before booking a hotel with 33% of guests refusing to book a hotel with no reviews. Hence, if yo…
Original Research
Northwestern University
· Original study ↗
Methodology
Attributed to a Northwestern study
Methodology documented
Segmentation
IndustryTravel & Hospitality
RegionGlobal
RoleAll marketers
Channelemail
Cite this stat
Plain Text
customer reviews: 80% share of customer reviews from post purchase emails. Source: Northwestern University (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/reviews-from-post-purchase-emails
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<blockquote cite="https://lighthousedata.io/data/reviews-from-post-purchase-emails" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>80%</strong> -- share of customer reviews from post purchase emails for customer reviews<br><small>Source: Northwestern University (2025) · <a href="https://lighthousedata.io/data/reviews-from-post-purchase-emails" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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