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?