C
Evidence Grade C
Use with Hedging
Dated
50%
50% -- email list growth rate for marketers (2013)
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
50%
Unit
Percentage
Data Vintage
2013
Entity
Evidence Quality
C
Moderate quality evidence
Useful directional data with some methodological gaps. Treat as indicative rather than definitive -- corroborate before citing in formal research.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Sources (2)
Marketing Sherpa
Primary
Tier B
https://heidicohen.com/10-ways-to-support-your-content-marketing-research/ ↗
Source Article
10 Ways to Support Your Content Marketing [Research] - Heidi Cohen
How to Maximize the Value of Your Audience Communications
In today’s dynamic landscape where people use social media and mobile to communicate, many marketers overlook the potential of email, the original digital social media that allows for two-way communication with your audience.
Roughly 60% of m…
Also cited by
2026-08-22
Original Research
Marketing Sherpa
· Original study ↗
Methodology
Based on Marketing Sherpa 2013 Email Marketing Benchmark Report
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Suggested hedging: According to limited, single-source data, based on claims without stated methodology, with unverified sample sizes...
Plain Text
marketers: 50% email list growth rate. Source: Marketing Sherpa (2013). Via Lighthouse Intelligence -- https://lighthousedata.io/data/marketing-sherpa-2013-email-marketing-benchmark-report-email-list-growth
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<blockquote cite="https://lighthousedata.io/data/marketing-sherpa-2013-email-marketing-benchmark-report-email-list-growth" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>50%</strong> -- email list growth rate for marketers<br><small>Source: Marketing Sherpa (2013) · <a href="https://lighthousedata.io/data/marketing-sherpa-2013-email-marketing-benchmark-report-email-list-growth" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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