aktarer zaman 12/2/11 quibids’ supply rule. dataset quibids product (id, name, value) auction (id,...
TRANSCRIPT
Aktarer Zaman12/2/11
QuiBids’ Supply Rule
Dataset
QUIBIDS
Product(id, name,
value)
Auction(id, end time,
final price)
Winning Bid(id,
username, type of bid)
Bid Bid …
Auction …
Product …
Products: 2,474Users: 199,528Auctions: 498,691Bids: 3,850,461Time Span: 4/21/2011 – 8/6/2011
3
Products Represented
1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81 85 89 93 97 101 1050
100
200
300
400
500
600
700
800
900
Days Starting April 21, 2011
Num
ber
of
Pro
ducts
4
Products Represented…
0
100
200
300
400
500
600
700
800
June 26 - August 5, 2011
Num
ber
of
Pro
ducts
5
Auctions
0
1000
2000
3000
4000
5000
6000
June 26 - August 5, 2011
Num
ber
of
Aucti
ons
6
Bids
0
100000
200000
300000
400000
500000
600000
700000
800000
900000
1000000
June 26 - August 5, 2011
Num
ber
of
Bid
s
7
Question that needs an answer:
Why did QuiBids change its inventory of products?
8
Unique Visitors to QuiBids
9
20 Days Before and After July 16, 2011
Before
• Products: 1,442
• Auctions: 88,516
• Users Captured: 51,632
After
• Products: 1,058
• Auctions: 88,194
• Users Captured: 48,466
10
Forming Communities
Initially
1. Products = Community
2. User community based on interest
Join communities
• Similar users in any to community
11
Visualizing Communities Before Change
12
Visualizing Communities After Change
13
So what’s QuiBids’ supply rule?
• Constant number of auction
• Increase representation of product based on user interest
• Maintain equilibrium with profitability
14
Conference Paper
• Penny auctions
• General information about QuiBids
• Strategies behind the QuiBids business
• The habits of users
15
Questions?