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Local network size is significant for online messenger services, local network size and network strength are significant for online community services, and total network size is significant for chat room services. For email services, none of the network externality factors are significant.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Research limitations\/implications<\/jats:title><jats:p>The paper shows that a total network size is an important network externality factor affecting the success of a network. However, users' satisfaction with network services and two additional network externality factors, local network size and network strength, are also important determinants. To generalize the finding, investigations into other network services in other environments and into some offline networks are necessary.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Originality\/value<\/jats:title><jats:p>The paper shows that depending on types of networks, managers can focus on different important network externality factors in managing their networks.<\/jats:p><\/jats:sec>","DOI":"10.1108\/10662240710737013","type":"journal-article","created":{"date-parts":[[2007,4,2]],"date-time":"2007-04-02T04:23:04Z","timestamp":1175487784000},"page":"156-168","source":"Crossref","is-referenced-by-count":23,"title":["Network externality and future usage of Internet services"],"prefix":"10.1108","volume":"17","author":[{"given":"Sung","family":"Yong Chun","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Minhi","family":"Hahn","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"140","reference":[{"key":"key2022020819581238900_b1","doi-asserted-by":"crossref","unstructured":"Anderson, E.W. and Sullivan, M.W. 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