Question: Network economics refers to business economics that benefit from the network effect, examples are website such as which multinational e-commerce corporation, facilitating online consumer-to-consumer and business-to-consumer sales?

Context articles: EBay
Vanier College at York University
Applied economics
Network economics
Wigix
Alibaba Group
Marxian economics
Business economics
EBay Enterprise
Network effect

eBay Inc. ( , stylized as ebay) is a multinational e-commerce corporation, facilitating online consumer-to-consumer and business-to-consumer sales.
 It is headquartered in San Jose, California.
 eBay was founded by Pierre Omidyar in 1995, and became a notable success story of the dot-com bubble.
 Today it is a multibillion-dollar business with operations in about 30 countries.
Vanier College, founded in 1966, was the second college to come into existence on the Keele Campus.
 The College is proudly named after General The Right Honourable Georges P. Vanier, one of the most respected Canadians of the 20th century.
 The mandated academic areas which Vanier College supports are: Business and Society, Business Economics, Children’s Studies, Classical Studies & Classics, Culture and Expression, Economics, Financial and Business Economics, Hellenic Studies, Humanities, Individualized Studies, Jewish Studies, Liberal Studies, Philosophy, Religious Studies, Social and Political Thought as well as all Undecided Majors in the Faculty of Liberal Arts and Professional Studies.
Applied Economics is the application of economic theory and econometrics in specific settings.
 As one of the two sets of fields of economics (the other set being the "core"), it is typically characterized by the application of the "core", i.e. economic theory and econometrics, to address practical issues in a range of fields including demographic economics, labour economics, business economics, industrial organization, agricultural economics, development economics, education economics, health economics, monetary economics, public economics, and economic history.
 The process often involves a reduction in the level of abstraction of this core theory.
 There are a variety of approaches including not only empirical estimation using econometrics, input-output analysis or simulations but also case studies, historical analogy and so-called common sense or the "vernacular".
 This range of approaches is indicative of what Roger Backhouse and Jeff Biddle argue is the ambiguous nature of the concept of applied economics.
 It is a concept with multiple meanings.
 Among broad methodological distinctions, one source places it in neither positive nor normative economics but the "art of economics", glossed as "what most economists do".
Network economics refers to business economics that benefit from the network effect.
 It is also known as Netromix.
 This is when the value of a good or service increases when others buy the same good or service.
 Examples are website such as EBay, or iVillage where the community comes together and shares thoughts to help the website become a better business organization.
Wigix, also known as Wigix.com, Wigix.cn, and Wigix, Inc., is an online consumer-to-consumer and business-to-consumer (B2C) online marketplace whose model mimics financial trading platforms.
 The company name is an acronym for "Want It Got It eXchange".
 Along with Wigix.com, the company also owns China-based ddku.com as a wholly owned subsidiary.
Alibaba Group Holding Limited () is a Chinese e-commerce company that provides consumer-to-consumer, business-to-consumer and business-to-business sales services via web portals.
 It also provides electronic payment services, a shopping search engine and data-centric cloud computing services.
 The group began in 1999 when Jack Ma founded the website Alibaba.com, a business-to-business portal to connect Chinese manufacturers with overseas buyers.
 In 2012, two of Alibaba's portals handled 1.1 trillion yuan ($170 billion) in sales.
 Suppliers from other countries are supported (with more stringent checks than for Chinese companies), but the company primarily operates in the People's Republic of China (PRC).
 At closing time on the date of its initial public offering (IPO), 19 September 2014, Alibaba's market value was US$231 billion.
 However, the stock has traded down and market cap was about $212 billion at the end of December 2015.
Marxian economics or the Marxian school of economics refers to a school of economic thought tracing its foundations to the critique of classical political economy first expounded upon by Karl Marx and Friedrich Engels.
 Marxian economics refers to several different theories and includes multiple schools of thought which are sometimes opposed to each other, and in many cases Marxian analysis is used to complement or supplement other economic approaches.
 Because one does not necessarily have to be politically marxist to be economically Marxian, the two adjectives coexist in usage rather than being synonymous.
 They share a semantic field while also allowing connotative and denotative differences.
Business economics is a field in applied economics which uses economic theory and quantitative methods to analyze business enterprises and the factors contributing to the diversity of organizational structures and the relationships of firms with labour, capital and product markets.
 A professional focus of the journal "Business Economics" has been expressed as providing "practical information for people who apply economics in their jobs."
eBay Enterprise, Inc. (formerly GSI Commerce, Inc.) was a multinational e-commerce corporation that specialized in creating, developing and running online shopping sites for brick and mortar brands and retailers.
 The company also provided a variety of marketing, consumer engagement, customer care, payment processing, fulfillment, fraud detection, and technology integration services.
A network effect (also called network externality or demand-side economies of scale) is the effect described in economics and business that one user of a good or service has on the value of that product to others.
 When a network effect is present, the value of a product or service is dependent on the number of others using it.