Answer to Question 1
The four basic types of e-commerce business models used in procurement and sourcing are sell-side system, electronic marketplace, buy-side system, and online trading community.
Sell-side system: Online businesses selling to individual companies or consumers.
Electronic marketplace: A seller-operated service that consists of a number of electronic catalogs from vendors within a market.
Buy-side system: A buyer-controlled e-procurement or e-commerce service that is housed on the buyer's system and is administered by the buyer, who typically pre-approves the suppliers who have access to the system, and the process of the suppliers' products and services that have been prenegotiated.
Online trading community: A system maintained by a third-party technology vendor where multiple buyers and multiple sellers in a given market can conduct business. The online community permits the buyers and sellers to conduct business transactions.
Answer to Question 2
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