Network Effects Explained

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Correction history

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1. 28 July 2026 · corrected by Emir Baycan

   Corrected seven overstated or imprecise claims: clarified the 1995 Netscape IPO (priced at $28, up from an initial $14 filing, closing its first day near $58); noted that Metcalfe's n-squared law is challenged by later analysts (Briscoe, Odlyzko, Tilly) who argue value grows more like n log n; clarified that the FTC's 2020 Facebook/Meta complaint is an allegation, not a court finding, and that the initial complaint was dismissed in 2021 before an amended complaint proceeded; reframed Dunbar's 150 as a rough, debated central estimate rather than a hard cognitive limit; qualified the Halaburda et al. 2018 '2-3x market share' figure as the study's estimate; recast Andrew Chen's 'fewer than 1 in 20 within 3 years' as a practitioner estimate, not a measured rate; and softened the Farronato and Fradkin Airbnb 5%/3% density thresholds from deterministic cutoffs to illustrative of the pattern.

   Before

   The article stated a Netscape IPO opening at $28, implied Metcalfe's arithmetic predicts a single-winner market, presented the FTC's procedural allegation as a factual finding, treated Dunbar's 150 as a hard limit, and reported precise 2-3x, fewer-than-1-in-20, and 5%/3% figures as established measured results.

   After

   Corrected the IPO facts, added the n log n critique of Metcalfe's Law, distinguished allegation from finding for the FTC case, qualified Dunbar's number, and reframed the platform statistics as study estimates or practitioner judgments rather than exact universal rules.

   Why: The underlying sources are real but were stated more precisely or deterministically than they support. Corrections scope the claims to the primary sources (Halaburda et al. 2018; Chen; Farronato and Fradkin 2022; the FTC complaint's litigation history) rather than adding new sources.

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Full contribution timeline

1. Correction 28 July 2026

   Emir Baycan: Corrected seven overstated or imprecise claims: clarified the 1995 Netscape IPO (priced at $28, up from an initial $14 filing, closing its first day near $58); noted that Metcalfe's n-squared law is challenged by later analysts (Briscoe, Odlyzko, Tilly) who argue value grows more like n log n; clarified that the FTC's 2020 Facebook/Meta complaint is an allegation, not a court finding, and that the initial complaint was dismissed in 2021 before an amended complaint proceeded; reframed Dunbar's 150 as a rough, debated central estimate rather than a hard cognitive limit; qualified the Halaburda et al. 2018 '2-3x market share' figure as the study's estimate; recast Andrew Chen's 'fewer than 1 in 20 within 3 years' as a practitioner estimate, not a measured rate; and softened the Farronato and Fradkin Airbnb 5%/3% density thresholds from deterministic cutoffs to illustrative of the pattern.

   Proof record →