E-Commerce Recommender Applications Page 23of 24
appealing, but current policies are hard to trust. Trusted privacy seals-of-approval still have not emerged, and technological solutions
can improve the privacy situation but still cannot avoid some need for trust, auditing, or both. Privacy in electronic commerce
remains an active research area at the intersection of sociology, economics, and computer science. Successful privacy solutions are
essential for recommenders, so consumers do not take the extreme approach of cloaking identity completely. The eventual solution is
likely to be a combination of the social and technological solutions being developed today.
Application Model Functional I/O Recommendation
Method
Design Issues
Targeted
Customer Input
Community
Input
Output Degree of
Personalization
Delivery
Broad Rec. List
Amazon Bookstore
Gift Ideas
Explicit navigation Item attributes
External item
popularity
Suggestion Manual selection Nonpersonalized
Pulling unordered list
and expert narrative
Amazon Purchase
Circles
Explicit navigation Purchase
history
Suggestion Statistical
summarization
Nonpersonalized
Pulling ordered list
CDNOW Buyer’ s
Guides
Explicit navigation Item attributes
External item
popularity
Suggestion
Reviews
Manual selection Nonpersonalized
Pulling unordered list
CDNOW Artist
Picks
None None Suggestion Manual selection Nonpersonalized
Pulling expert
narrative
CDNOW Top 100 None Purchase
history
Suggestion Statistical
summarization
Nonpersonalized
Pulling ordered list
Drugstore Advisor Keyword/Attributes Item attributes Suggestion
Reviews
Attribute based
Manual selection
Ephemeral Pulling unordered list
and expert narrative.
MovieFinder Top
10
Explicit navigation Item attributes
External item
popularity
Suggestion Manual selection Nonpersonalized
Pulling unordered list
Comments and
Ratings
Amazon Customer
Comments
Implicit navigation Ratings
Text
comments
Prediction
Ratings
Reviews
Statistical
summarization
Nonpersonalized
Passive delivery of
comments, individual
ratings of other
customers, and a
predicted rating.
Drugstore Test
Drives
Explicit navigation Ratings
Text
comments
Prediction
Ratings
Reviews
Statistical
summarization
Nonpersonalized
Pulling comments,
individual ratings of
other customers, and a
predicted rating.
eBay Feedback
Profile
Implicit navigation Ratings
Text
comments
Prediction
Ratings
Reviews
Statistical
summarization
Nonpersonalized
Passive delivery of
comments, individual
ratings of other
customers, and a
predicted rating.
Notification
Service
Amazon Eyes Keyword/Attribute Item attributes Suggestion Attribute based Persistent Pushing single
recommendation
Amazon.com
Delivers
Keyword/Attribute Item attributes Reviews Manual selection Persistent Pushing expert
narrative
eBay Personal
Shopper
Keyword/Attribute Item attributes Suggestion Attribute based Persistent Pushing unordered list
ProductAssociated
Amazon Customers
who Bought
Implicit navigation Purchase
history
Suggestion Item-to-Item
correlation
Ephemeral Passive delivery of
unordered list
CDNOW Album
Advisor -Single
Item
Explicit navigation Purchase
history
Suggestion Item-to-Item
correlation
Ephemeral Passive delivery of
unordered list
E-Commerce Recommender Applications Page 24of 24