B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
24%
24% -- sales increase rate for charm pricing ($39 vs $34/$44 dress pricing) (2025)
A study by MIT and the University of Chicago found that pricing a women's dress at $39 instead of $34 or $44 increased sales by 24%.
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Lighthouse Research Team
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Source verified
Evidence graded
Value
24%
Unit
Percentage
Data Vintage
2025
Entity
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
MIT and University of Chicago
Primary
Tier C
https://www.debszabo.com/blog/black-friday-pricing-psychology ↗
Source Article
Black Friday 2025: Pricing Psychology That Converts 4x - Part 3
Black Friday 2025: Pricing Psychology That Converts 4x - Part 3
Oct 30, 2025The Magic Numbers That Sell Out Your Offers
Everyone loves a bargain, right? But here’s the thing: the secret to selling out your offer this Black Friday isn’t just about discounting. It’s about the number you choose. Becaus…
Original Research
MIT and University of Chicago
· Original study ↗
Methodology
MIT and University of Chicago study comparing dress priced at $34, $39, and $44; $39 version outsold others
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
charm pricing ($39 vs $34/$44 dress pricing): 24% sales increase rate. Source: MIT and University of Chicago (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/charm-pricing-sales-increase-24
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<blockquote cite="https://lighthousedata.io/data/charm-pricing-sales-increase-24" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>24%</strong> -- sales increase rate for charm pricing ($39 vs $34/$44 dress pricing)<br><small>Source: MIT and University of Chicago (2025) · <a href="https://lighthousedata.io/data/charm-pricing-sales-increase-24" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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