More relevant buyers and sellers improve transaction opportunities for each other.
How Marketplace network effects work
Measure matching outcomes in the relevant local or specialist market. Total registered users can increase while the useful pool for a particular transaction remains unchanged.
How companies won with Marketplace network effects
From the win chains in Strategy Canon case studies: what the winner did, and what its rival did at the same step.
vs. Sidecar
Uber
Marketplace network effect (city density)
What it did
Pickups under five minutes in dense cities; drivers follow riders to the bigger network
Sidecar
Outside San Francisco drivers got a ride every hour or two and left
Auctions and zShops failed, then Marketplace put sellers on the same product pages: third-party share of units sold rose from 3% (1999) to 17% (2002) to 58% (2018), from more than two million sellers
Barnes & Noble
bn.com stayed a books-and-media retailer adding used and out-of-print titles
Does adding participants improve fill rates, match quality or time to transact in the same market? Where does that improvement flatten?
Who names it
Author
What they call it / where it appears
Neumann
A Taxonomy of Moats — Marketplace liquidity
Note. The diagnostic and scenario are Strategy Canon’s analytical application. Test the firm’s benefit and exclusion mechanism separately; this category alone does not establish Power.