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Wigandamp。 Yesha, 1996) (2)Impact on the value chain Porter(1985) developped value chain model to Consider the most basic relation activity that links customer to exist from the IT industry is see is be advantageous to this distance activity, and allow to pass an electronics The layer of the market and electronics makes a nearer one step of near link on the value chain of integration.(Malone, Yates, amp。Robertsamp。Digital media:Modem puter and munication thechnolgy provides a means for panies to conduct anizational redesign and business process reengineering which is required by the intensified mechanism and structure of the market,with the increasing use of puter and ommuniction technology,require a certain degree of electronic data exchange(EDI)and provide paperfree,electronic business connections,hav been dicussed as tools by panies engaging in of these tools can be understood as one kind of valueadded work service that enables users to replace traditional,paperbased orders and documents with electronic present prevaence of the InterNet,with its vast capabilities and proven reliability,has been recognized as a newfashioned media(Wigand,1995).The World Wide Web(WWW),the first and current worked global implementation of a hypermedia putermediated environment,is increasingly being recognized as an important mercial medium and marketing envirgnment,The parties involved in transactions:the transactions executed in EC usually involve the following three major parties:(1)buyer,(2)supplier,and(3) validity of the fact that buyer and supplier exist in transactions can be easily justified .In the EC environment,a wide range of valuedaddedwork services,including EDI services, transfer,and electronic funds transfer,are provided by specific work service panies(Tallarico,1998),which is the deinittion of an SIP used in this paper,Similar notions ca be found in Bakos(1991a,b)who defined the firms operating electronic maret system(orelectronic marketplace)as the intermediary,which may be a market participant a buyer or a seller ,an independent third party,or a multifirm consortium. Contene of transaction:The results of survey,which is conducted by Chen(1998)it Taiwan,shows that the merchandise in Estores can be divided into two categories:(1)the merchandise which is tangible and must be delivered to endcustomers through physical distribution channels,such as books,apparel,etc,and (2)the merchandise which is intangible and can be stored and transferred elecronically,such as Emagazines,online database 設(shè)計(jì)巴巴工作室 search,and downloadable software,Hwang(1998),form the perspectivers of stoer operation and selling location,divided the goods sold in the e_store into hard goods,soft goods,and online can be concluded in this paper,basedon the prevously referred to researches, to divide the merchandise into the tangible good