Question

Market Design Problem:

Table 1 describes the bid history for some past auction on eBay. The starting price of the auction was $699.00, and the final price (paid by the winner, bidder D, was $1,005.00. The bids given in the table are the submitted bid, and for each submitted bid the date-time at which the bid was made.

The date stamp is the date at which the corresponding bidder submitted his/her bid.

Give the full history of the bids, including the automatic bids. For each bid indicate the date stampe of the bid. The date stame of an automatic bid is the date stamp of the

submitted bid that what used to calculate the automatic bid.

Bidder, bid, date stamp

D $1,005.00 3 Feb 2019 at 7:01:35PM PST

B $1,000.00 1 Feb 2019 at 2:24:01PM PST

D $975.00 3 Feb 2019 at 7:01:31PM PST

A $901.00 3 Feb 2019 at 5:23:49PM PST

A $876.00 3 Feb 2019 at 5:23:25PM PST

A $846.00 3 Feb 2019 at 5:23:14PM PST

A $814.00 3 Feb 2019 at 5:23:02PM PST

A $775.00 3 Feb 2019 at 5:22:47PM PST

A $735.00 3 Feb 2019 at 5:22:35PM PST

C $709.00 31 Jan 2019 at 3:19:38PM PST

A $699.00 31 Jan 2019 at 9:00:30AM PST

Starting Price $699.00 30 Jan 2019 at 12:06:59PM PST

Table 1: Bid history

Answer 1

The objective of the following analysis is to show the date stamp for each bid.

Thus, the result is:

Bidder	Bid	Date and Time Stamp	Date Stamp
Starting	$699.00	30 Jan 2019 12:06:59PM PST	30Jan2019
A	$699.00	31 Jan 2019 9:00:30AM PST	31Jan2019
C	$709.00	31 Jan 2019 3:19:38PM PST	31Jan2019
A	$735.00	3 Feb 2019 5:22:35PM PST	3Feb2019
A	$775.00	3 Feb 2019 5:22:47PM PST	3Feb2019
A	$814.00	3 Feb 2019 5:23:02PM PST	3Feb2019
A	$846.00	3 Feb 2019 5:23:14PM PST	3Feb2019
A	$876.00	3 Feb 2019 5:23:25PM PST	3Feb2019
A	$901.00	3 Feb 2019 5:23:49PM PST	3Feb2019
D	$975.00	3 Feb 2019 7:01:31PM PST	3Feb2019
B	$1,000.00	1 Feb 2019 2:24:01PM PST	1Feb2019
D	$1,005.00	3 Feb 2019 7:01:35PM PST	3Feb2019