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How Does Ranking Affect User Choice in Online Search?

This paper from Mark Glick, Greg Richards, Margarita Sapozhnikov and me is now published in Review of Industrial Organization, and is available under Open Access here.

Here is the abstract:

This paper investigates whether a search engine’s ordering of algorithmic results has an important effect on website traffic. A website’s ranking on a search engine results page is positively correlated with the clicks that it receives. This could result from the search engine’s accurately predicting the websites relevance to users. Or it could result from users merely clicking on the highest ranked links, regardless of the website’s relevance. Using a unique dataset, we find that a website’s rank, not just its relevance, strongly and significantly affects the likelihood of a click. We also find evidence that rank influences CTRs partly by controlling access to the scarce attention of users, but primarily by substituting the reputational capital of the search engine for the reputation of individual websites.

Cooperation Against Theft

At last, my paper with Wided Mattoussi has appeared in The American Journal of Agricultural Economics; the reference is Am. J. Agr. Econ. (2014) 96 (1): 124-153. doi: 10.1093/ajae/aat083

The published paper (gated) is available here and the final manuscript is available here.

Today with Sean O’Rourke

Here is an interview on RTE Radio 1 about my lecture at the Royal Irish Academy: it is in the podcasts of Monday 13th January

Microeconomics for all

This is the title given by Project Syndicate to my op-ed piece about microeconomics teaching. The home page of the INET curriculum project is here.

Capuchin monkeys in Costa Rica

My son Edmond is currently working as a research assistant for a project run by Susan Perry in Cost Rica. His blog, with some excellent monkey pictures, is here.

White-faced capuchin monkeys are fascinating animals with a rich variety of social behaviors. Susan has written a book about them with Joseph Manson called Manipulative Monkeys: The Capuchins of Lomas Barbudal.

Recommended Books in 2013

Because I have had so little time to write here about books I have read in 2013, but have still (fortunately) had time to read some, I thought I would make a list of some of the most memorable, without necessarily adding much commentary.

In the following; books given 5 Stars are enthusiastically recommended, and are on a part with the other books on my “Recommended books” page. But I will mention some others with lower ratings that are nevertheless interesting.

Some of these books were published in 2013 but not all. Books are in alphabetical order of author, five stars first then four stars.

I start with a few I can remember and will add more between now and Christmas, and hope to add a short commentary to each title before then.

* * * * *

Craig Childs: The Secret Knowledge of Water: “There are two easy ways to die in the desert: thirst and drowning”. A strange and touching memoir of one man’s quest to find hidden water in the deserts of the South-Western United States.

Paul Collier: Exodus: How Migration Is Changing Our World

Sebastian Faulks: Jeeves and the Wedding Bells

Jonathan Haidt: The Righteous Mind: Why Good People are Divided by Politics and Religion

Michel Houellebecq: La Carte et le Territoire

P.D. James: Death Comes to Pemberley

Barbara Kingsolver: The Poisonwood Bible

Jon Krakauer: Under the Banner of Heaven: A Story of Violent Faith

Dany Laferiere: Comment Faire l’Amour à Un Nègre Sans Se Fatiguer

Hilary Mantel: Wolf Hall and Bring Up The Bodies: Magnificent first and second books in a trilogy about Thomas Cromwell, chief counselor to King Henry 8th. Fascinating from many points of view, including for a subtle portrait of the corrupting effects of power. At the beginning Cromwell is apparently quite upset to hear about the effects of torture on heretics, while by the end of the first book he is sending political opponents to the stake or the executioner’s block, not exactly without a qualm but with a matter-of-fact acceptance that this follows from the policies to which he has become committed. Shows that the best way to make someone do something morally troubling is not to give them good arguments but simply to insinuate to them that it is the logical consequence of something else they have already decided to do. The second book sees this deadly logic applied to the destruction of Anne Boleyn.

Jan Morris: Conundrum

Siddhartha Mukherjee: The Emperor of All Maladies: A Biography of Cancer

Chris Stringer: Lone Survivors: How We Came to Be the Only Humans on Earth

Alison Wolf: The XX Factor: How Working Women are Creating a New Society

 

* * * *

 

Alison Booth: Stillwater Creek

Jeffrey Eugenides: The Marriage Plot

Richard Powers: Gain

Bhisham Sahni: Tamas

Sheryl Sandberg: Lean In: Women, Work and the Will to Lead

Richard Trivers: The Folly of Fools: The Logic of Deceit and Self-Deception in Human Life

 

* * *

Richard Rhodes: Hedy’s Folly: The Life and Breakthrough Inventions of Hedy Lamarr, the Most Beautiful Woman in the World

The Thinking Head

This beautiful bronze statue, La Cabeza Pensante, by the sculptor Maria Purificacion Herrero, was given to me in Bilbao by the Urrutia Elejalde Foundation on the 8th November at the award of their 2013 Diversity Prize. I am delighted. More details here.

 

Sensitive Markets

On 11th September 2013 I asked students in my Markets and Organizations class to fill in a questionnaire about their attitudes to undertaking various activities in exchange for money, including buying and selling bodily organs, sexual services, weapons, drugs, votes, grades in class, and several other items. The results were very interesting. In particular the questionnaire distinguished between believing that certain exchanges should be illegal, believing that they are immoral, and feeling personally uncomfortable about undertaking them. It also distinguished between buying and selling.

The questionnaire, and an analysis of the results, can be downloaded here.

Some highlights:

1)   Most items have more people feeling uncomfortable than those who morally disapprove, and more who morally disapprove than would want to ban the transaction. Exceptions include drugs and guns which, interestingly, have substantially fewer people believing it is immoral to buy them than think it should be illegal to buy them. This may reflect a view that these items pose challenges to self-control, and that the law is there partly to protect people from themselves.

2)   Drugs and (to a lesser extent) handguns also display a striking difference between the perceived immorality of buying and selling, with respondents disapproving much less of buyers than of sellers.

3)   In most other cases there is not much systematic difference between responses about buying and those about selling, at least as far as illegality and immorality are concerned. But people tend to feel more uncomfortable about selling than about buying.

4)   Trade in sex makes people feel very uncomfortable – more than anything else, except buying grades in class – even though only around a third want to ban such trade. More want to criminalize selling than buying sex, which runs counter to recent legal changes implemented in Sweden and under discussion in France.

5)   Trade in votes and trade in grades provoke the most consistently negative scores across modes.

 

There were some interesting national differences (not in the table). Most nationalities were too small in number to be a representative sample, but there were 42 French respondents and 12 Germans:

On whether it is immoral to buy sexual services, 30 out of 42 French respondents say “yes” but only 2 out of 12 Germans (though 11 out of 12 are “uncomfortable” with the idea). Incidentally, the Belgians side with the Germans and not with the French on this.

On whether the sale of handguns should be illegal, only 25 out of 40 French respondents say “yes” (2 blank responses) but 11 out of 12 Germans.

On whether the sale of surrogacy services should be illegal, 16 out of 38 French respondents say “yes” (4 blanks) but only 1 out of 12 Germans.

 

The image featured on this post is from an article in The Guardian entitled “Why Men Use Prostitutes”, and the image corroborates one finding of the questionnaire, which is that sex is probably the topic that makes most respondents feel uncomfortable when discussing buying and selling. The Guardian article reports a study, available here, which discusses motivations of men who buy commercial sexual services.

Research into biomarkers

This is the title of a new paper co-written with Fiona Scott Morton, just out in Health Management, Policy and Innovation. You can download the pdf here.

The future of feminism

This is the title the TLS has given to my review of the new books by Alison Wolf and Sheryl Sandberg. The review is here and you can download a pdf here.

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