online auction thesis

Online Auction Markets

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Central to the explosive growth of the Internet has been the desire

of dispersed buyers and sellers to interact readily and in a manner

hitherto impossible. Underpinning these interactions, auction

pricing mechanisms have enabled Internet transactions in novel ways.

Despite this massive growth and new medium, empirical work in

marketing and economics on auction use in Internet contexts remains

relatively nascent. Accordingly, this dissertation investigates the

role of online auctions; it is composed of three essays.

The first essay, ``Online Auction Demand,'' investigates seller and

buyer interactions via online auction websites, such as eBay. Such

auction sites are among the earliest prominent transaction sites on

the Internet (eBay started in 1995, the same year Internet Explorer

was released) and helped pave the way for e-commerce. Hence, online

auction demand is the first topic considered in my dissertation. The

second essay, ``A Dynamic Model of Sponsored Search Advertising,''

investigates sponsored search advertising auctions, a novel approach

that allocates premium advertising space to advertisers at popular

websites, such as search engines. Because sponsored search

advertising targets buyers in active purchase states, such

advertising venues have grown very rapidly in recent years and have

become a highly topical research domain. These two essays form the

foundation of the empirical research in this dissertation. The third

essay, ``Sponsored Search Auctions: Research Opportunities in

Marketing,'' outlines areas of future inquiry that I intend to

pursue in my research.

Of note, the problems underpinning the two empirical essays exhibits

a common form, that of a two-sided network wherein two parties

interact on a common platform (Rochet and Tirole, 2006). Although

theoretical research on two-sided markets is abundant, this

dissertation focuses on their use in e-commerce and adopts an

empirical orientation. I assume an empirical orientation because I

seek to guide firm behavior with concrete policy recommendations and

offer new insights into the actual behavior of the agents who

interact in these contexts. Although the two empirical essays share

this common feature, they also exhibit notable differences,

including the nature of the auction mechanism itself, the

interactions between the agents, and the dynamic frame of the

problem, thus making the problems distinct. The following abstracts

for these two essays as well as the chapter that describes my future

research serve to summarize these contributions, commonalities and

differences.

Online Auction Demand

With $40B in annual gross merchandise volume, electronic auctions

comprise a substantial and growing sector of the retail economy. For

example, eBay alone generated a gross merchandise volume of $14.4B

during the fourth quarter of 2006. Concurrent with this growth has

been an attendant increase in empirical research on Internet

auctions. However, this literature focuses primarily on the bidder;

I extend this research to consider both seller and bidder behavior

in an integrated system within a two-sided network of the two

parties. This extension of the existing literature enables an

exploration of the implications of the auction house's marketing on

its revenues as well as the nature of bidder and seller interactions

on this platform. In the first essay, I use a unique data set of

Celtic coins online auctions. These data were obtained from an

anonymous firm and include complete bidding and listing histories.

In contrast, most existing research relies only on the observed

website bids. The complete bidding and listing histories provided by

the data afford additional information that illuminates the insights

into bidder and seller behavior such as bidder valuations and seller

Using these data from the ancient coins category, I estimate a

structural model that integrates both bidder and seller behavior.

Bidders choose coins and sellers list them to maximize their

respective profits. I then develop a Markov Chain Monte Carlo (MCMC)

estimation approach that enables me, via data augmentation, to infer

unobserved bidder and seller characteristics and to account for

heterogeneity in these characteristics. My findings indicate that:

i) bidder valuations are affected by item characteristics (e.g., the

attributes of the coin), seller (e.g. reputation), and auction

characteristics (e.g., the characteristics of the listing); ii)

bidder costs are affected by bidding behavior, such as the recency

of the last purchase and the number of concurrent auctions; and iii)

seller costs are affected by item characteristics and the number of

concurrent listings from the seller (because acquisition costs

evidence increasing marginal values).

Of special interest, the model enables me to compute fee

elasticities, even though no variation in historical fees exists in

these data. I compute fee elasticities by inferring the role of

seller costs in their historical listing decision and then imputing

how an increase in these costs (which arises from more fees) would

affect the seller's subsequent listing behavior. I find that these

implied commission elasticities exceed per-item fee elasticities

because commissions target high value sellers, and hence, commission

reductions enhance their listing likelihood. By targeting commission

reductions to high value sellers, auction house revenues can be

increased by 3.9%. Computing customer value, I find that attrition

of the largest seller would decrease fees paid to the auction house

by $97. Given that the seller paid $127 in fees, competition

offsets only 24% of the fees paid by the seller. In contrast,

competition largely in the form of other bidders offsets 81% of the

$26 loss from buyer attrition. In both events, the auction house

would overvalue its customers by neglecting the effects of

competition.

A Dynamic Model of Sponsored Search Advertising

Sponsored search advertising is ascendant. Jupiter Research reports

that expenditures rose 28% in 2007 to $8.9B and will continue to

rise at a 26% Compound Annual Growth Rate (CAGR), approaching half

the level of television advertising and making sponsored search

advertising one of the major advertising trends affecting the

marketing landscape. Although empirical studies of sponsored search

advertising are ascending, little research exists that explores how

the interactions of various agents (searchers,

advertisers, and the search engine) in keyword

markets affect searcher and advertiser behavior, welfare and search

engine profits. As in the first essay, sponsored search constitutes

a two-sided network. In this case, bidders (advertisers) and

searchers interact on a common platform, the search engine. The

bidder seeks to maximize profits, and the searcher seeks to maximize

The structural model I propose serves as a foundation to explore

these outcomes and, to my knowledge, is the first structural model

for keyword search. Not only does the model integrate the behavior

of advertisers and searchers, it also accounts for advertisers

competition in a dynamic setting. Prior theoretical research has

assumed a static orientation to the problem whereas prior empirical

research, although dynamic, has focused solely on estimating the

dynamic sales response to a single firm's keyword advertising

expenditures.

To estimate the proposed model, I have developed a two-step Bayesian

estimator for dynamic games. This approach does not rely on

asymptotics and also facilitates a more flexible model

specification.

I fit this model to a proprietary data set provided by an anonymous

search engine. These data include a complete history of consumer

search behavior from the site's web log files and a complete history

of advertiser bidding behavior across all advertisers. In addition,

the data include search engine information, such as keyword pricing

and website design.

With respect to advertisers, I find evidence of dynamic

bidding behavior. Advertiser valuation for clicks on their sponsored

links averages about $0.27. Given the typical $22 retail price of

the software products advertised on the considered search engine,

this figure implies a conversion rate (sales per click) of about

1.2%, well within common estimates of 1-2% (gamedaily.com). With

respect to consumers, I find that frequent clickers place a

greater emphasis on the position of the sponsored advertising link.

I further find that 10% of consumers perform 90% of the clicks.

I then conduct several policy simulations to illustrate the effects

of change in search engine policy. First, I find that the

search engine obtains revenue gains of nearly 1.4% by sharing

individual level information with advertisers and enabling them to

vary their bids by consumer segment. This strategy also improves

advertiser profits by 11% and consumer welfare by 2.9%. Second, I

find that a switch from a first to second price auction results in

truth telling (advertiser bids rise to advertiser valuations), which

is consistent with economic theory. However, the second price

auction has little impact on search engine profits. Third, consumer

search tools lead to a platform revenue increase of 3.7% and an

increase of consumer welfare of 5.6%. However, these tools, by

reducing advertising exposure, lower advertiser profits by 4.1%.

Sponsored Search Auctions: Research Opportunities in Marketing

In the final chapter, I systematically review the literature on

keyword search and propose several promising research directions.

The chapter is organized according to each agent in the search

process, i.e., searchers, advertisers and the search engine, and

reviews the key research issues for each. For each group, I outline

the decision process involved in keyword search. For searchers, this

process involves what to search, where to search, which results to

click, and when to exit the search. For advertisers, this process

involves where to bid, which word or words to bid on, how much to

bid, and how searchers and auction mechanisms moderate these

behaviors. The search engine faces choices on mechanism design,

website design, and how much information to share with its

advertisers and searchers. These choices have implications for

customer lifetime value and the nature of competition among

advertisers. Overall, I provide a number of potential areas of

future research that arise from the decision processes of these

various agents.

Foremost among these potential areas of future research are i) the

role of alternative consumer search strategies for information

acquisition and clicking behavior, ii) the effect of advertiser

placement alternatives on long-term profits, and iii) the measure of

customer lifetime value for search engines. Regarding the first

area, a consumer's search strategy (i.e., sequential search and

non-sequential search) affects which sponsored links are more likely

to be clicked. The search pattern of a consumer is likely to be

affected by the nature of the product (experience product vs. search

product), the design of the website, the dynamic orientation of the

consumer (e.g., myopic or forward-looking), and so on. This search

pattern will, in turn, affect advertisers payments, online traffic,

sales, as well as the search engine's revenue. With respect to the

second area, advertisers must ascertain the economic value of

advertising, conditioned on the slot in which it appears, before

making decisions such as which keywords to bid on and how much to

bid. This area of possible research suggests opportunities to

examine how advertising click-through and the number of impressions

differentially affect the value of appearing in a particular

sponsored slot on a webpage, and how this value is moderated by an

appearance in a non-sponsored slot (i.e., a slot in the organic

search results section). With respect to the third area of future

research, customer value is central to the profitability and

long-term growth of a search engine and affects how the firm should

allocate resources for customer acquisition and retention.

Organization

This dissertation is organized as follows. After this brief

introduction, the essay, ``Online Auction Demand,'' serves as a

basis that introduces some concepts of auctions as two-sided

markets. Next, the second essay, ``A Dynamic Model of Sponsored

Search Advertising,'' extends the first essay by considering a

richer context of bidder competition and consumer choice behavior.

Finally, the concluding chapter, which outlines my future research

interests, considers potential extensions that pertain especially to

sponsored search advertising.

Description

Yao, Song (2009). Online Auction Markets . Dissertation, Duke University. Retrieved from https://hdl.handle.net/10161/1073 .

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Dukes student scholarship is made available to the public using a Creative Commons Attribution / Non-commercial / No derivative (CC-BY-NC-ND) license .

Analysis, Design and Implementation of a Web- Based Online Auction System

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Ayla Cordell | Graduate School of Arts and Sciences

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Watch CBS News

Gold pocket watch found on body of Titanic's richest passenger sells for record $1.46 million

By Aliza Chasan

Edited By Stephen Smith

Updated on: April 29, 2024 / 7:00 AM EDT / CBS News

A pocket watch that belonged to the wealthiest passenger aboard the Titanic was auctioned in England Saturday for $1.46 million (£1.17 million), breaking the record for an object linked to the 1912 disaster, an auction house said this weekend. An American buyer won the bidding war for John Jacob Astor IV's 14-carat gold Waltham pocket watch, shattering the auctioneer's pre-sale estimate of £150,000, according to  Henry Aldridge & Son . 

The watch, engraved with the initials JJA, was found along with Astor's body when his remains were recovered several days after the Titanic sank. He was also found with a diamond ring, gold and diamond cufflinks, 225 pounds in English notes, and $2,440.

"Astor is well known as the richest passenger aboard the R.M.S. Titanic and was thought to be among the richest people in the world at that time, with a net worth of roughly $87 million (equivalent to several billion dollars today,)" the auction house wrote.

Astor was on the Titanic with wife, Madeleine. The business tycoon, who was in his 40s, had married the 18-year-old on Sept. 11, 1911, according to the auction house. The newlyweds took an extended honeymoon in Europe and Egypt while they waited for gossip about their marriage to die down. They were headed back to the U.S. when the Titanic hit an iceberg on April 14, 1912.

According to the auction house, Astor asked if he could join his wife on a lifeboat, mentioning her "delicate condition." After being told he needed to wait until all the women and children were away, Astor reportedly lit a cigarette and tossed his gloves to his wife. He went off to smoke with author Jacques Futrelle, who also died when the Titanic sank. They were among the more than 1,500 who perished. 

Astor's body — and his watch — were recovered by the steamer CS McKay-Bennett on April 22. His wife survived.

"The watch itself was completely restored after being returned to Colonel Astor's family and worn by his son making it a unique part of the Titanic story and one of the most important pieces of horological history relating to the most famous ship in the world," the auction house said.

The sale of the pocket watch comes as other items from the infamous shipwreck have also hit the auction block, most recently a photo taken on April 16, 1912, that apparently shows the iceberg that doomed the ship.

In November, a  rare menu  from the  Titanic 's first-class restaurant  sold at auction along with a pocket watch from another man who died in the 1912 disaster. The menu sold for about about $101,600. The  pocket watch , recovered from Russian immigrant Sinai Kantor, sold for about $118,700. 

Before his death, Astor was a business magnate, real estate developer, investor, writer, and a lieutenant colonel in the Spanish–American War, according to the auction house. He founded the St. Regis hotel in New York City, which still stands today. Astor is also credited with inventing an early form of air conditioning by blowing cold air over the hotel's wall vents

He was the great grandson of John Jacob Astor , a fur trader who died in 1848 as one of the wealthiest men in the U.S., according to the Library of Congress. In their 2023 book " Astor: The Rise and Fall of an American Fortune, " Anderson Cooper and co-author historian Katherine Howe described how the family made its fortune. 

Aliza Chasan is a digital producer at 60 Minutes and CBSNews.com. She has previously written for outlets including PIX11 News, The New York Daily News, Inside Edition and DNAinfo. Aliza covers trending news, often focusing on crime and politics.

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Body of missing paddleboarder, 54, recovered from Folsom Lake

Spare The Air has played vital role in Sacramento's air quality awareness for 30 years

Biden expands 2 national monuments in NorCal and SoCal significant to tribal nations

2 arrested after seen driving stolen forklift and drinking wine in Auburn, police say