The reasons for entry are:
Referrals
Centers of influence
Directories
Trade publications and trade shows
Telemarketing, direct mail, e-mail, and advertising
Websites and computerized databases
Cold calling
Networking
The reasons for exit are:
Relationship between customer and salesperson deteriorates
Business failure
New buyer buys from another source
Acquisitions and mergers
Customer moves
Increase size of business
Customer has only a one-time or extended need for product
Customer needs change because of new technology
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