Wednesday, June 19, 2013

Compensating kidney donors with charitable contributions--Choi, Gulati and Posner

Organ shortages remain despite the increase in live donation that has accompanied kidney exchange. But it is illegal to pay donors, so there's an ongoing discussion of other ways to induce a greater supply.  Here's a proposal by Choi, Gulati and Posner...


Altruism Exchanges and the Kidney Shortage

Stephen J. Choi 


New York University School of Law

G. Mitu Gulati 


Duke University - School of Law

Eric A. Posner 


University of Chicago - Law School

January 16, 2013

University of Chicago Institute for Law & Economics Olin Research Paper No. 630
NYU Law and Economics Research Paper No. 13-03 

Abstract:      
Not enough kidneys are donated each year to satisfy the demand from patients who need them. Strong moral and legal norms interfere with market-based solutions. To improve the supply of kidneys without violating these norms, we propose legal reforms that would strengthen the incentive to donate based on altruistic motives. We propose that donors be permitted to donate kidneys in exchange for commitments by recipients or their benefactors to engage in charitable activity or to donate funds to charities chosen by donors. And we propose that charities be permitted to create Altruism Exchanges, which would permit large numbers of altruists to make charitable exchanges with each other, including but not limited to kidney donations. Altruism Exchanges would solve two significant problems with the current system of voluntary kidney donations: the risk of default and the lack of liquidity.



 HT: Alexander Berger

Tuesday, June 18, 2013

My graduation speech to Stanford economics grads, June 16, 2013

On Sunday I got to dress as Harry Potter and give the Stanford economics graduation speech (on matching and graduation) at Stanford's commencement exercises.


Monday, June 17, 2013

Non-directed kidney donation is up in the UK

Altruistic organ donations rise in UK almost three-fold

"The number of living people giving one of their organs to a stranger almost tripled last year in the UK, according to new figures.

The Human Tissue Authority (HTA) approved 104 so-called altruistic organ donations in 2012-13 compared with 38 the previous year."
*******************

Here are the UK statistics, and here is the page for the UK's kidney exchange program: Paired donation matching scheme

Sunday, June 16, 2013

Deceased organ donation and solicitation in Israel: video of my talk at the conference in memory of Jean Francois Mertens in Jerusalem

Here's a video of the talk I gave at the Center for Rationality conference in memory of Jean Francois Mertens on June 7 2013.


Saturday, June 15, 2013

An unusual blogging distinction, if it were true

Science writer Colin Schultz writing about Why Scientists Shouldn’t Be Afraid of Blogging and Social Media, presents a slide show that makes the following claim:

So this is Market Design. It’s written by Alvin Roth. Alvin stands as being, as far as I know, the only person with a Nobel prize who runs a blog. Alvin, along with Lloyd Shapley, won the Nobel Memorial Prize in Economic Sciences last year, and this was Alvin’s blog post that day.
******************

I would count the Becker-Posner blog in this category too, but I can't tell whether Mr. Schultz overlooked it, or doesn't count it as what he thinks of as a blog...

Are there any others that you know of?

Friday, June 14, 2013

EC 13: ACM conference on Electronic Commerce, in Philadelphia, June 16-20 2013

EC 13, the 14th ACM conference on Electronic Commerce, will be held in Philadelphia, at Penn.

There will be workshops the 16th and 17th, and the conference proper will be the 18-20th. Some of the sessions that may be of particular interest to readers of this blog are Monday June 17 tutorials on market design by Utku Unver from 9-12:30 and by Tayfun Sonmez from 2-5:30, a session on kidney exchange on Wednesday June 19 (chaired by Aaron Roth) from 10:20-11:20, my talk on kidney exchange on Thursday June 20 from 9-10:00, and a session on Matching (chaired by Itai Ashlagi) from 11:40-12:40. There are also a bunch of sessions on mechanism design, with and without money.


 Here's the program (and here are the abstracts):



Tuesday, June 18, 2013
8:45 - 9:00 AM
Keynote Talk I
Chair: Eva Tardos
9:00 - 10:00 AM
Cascading Behavior in Social and Economic Networks
Jon Kleinberg
10:20 - 11:20 AM
Session 2a: Mechanism Design I
Chair: Costis Daskalakis
 
Prior-Independent Auctions for Risk-Averse Agents
Hu Fu, Jason Hartline and Darrell Hoy
Prior-free Auctions for Budgeted Agents
Nikhil R Devanur, Bach Ha and Jason Hartline
On the Ratio of Revenue to Welfare in Single-Parameter Mechanism Design
Robert Kleinberg and Yang Yuan
Session 2b: Prediction Markets
Chair: David Pennock
 
Cost Function Market Makers for Measurable Spaces, 
Yiling Chen, Michael Ruberry and Jennifer Wortman Vaughan
What You Jointly Know Determines How You Act --- Strategic Interactions in Prediction Markets
Xi Alice Gao, Jie Zhang and Yiling Chen
An Axiomatic Characterization of Adaptive-Liquidity Market Makers, 
Xiaolong Li and Jennifer Wortman Vaughan
11:20 - 11:40 AMBreak
11:40 - 12:40 AM
Session 3a: Multidimensional Mechanism Design
Chair: Michal Feldman
Multi-parameter Mechanisms with Implicit Payment Computation, 
Moshe Babaioff, Robert Kleinberg and Aleksandrs Slivkins
Optimal Auctions via the Multiplicative Weight Method
Anand Bhalgat, Sreenivas Gollapudi and Kamesh Munagala
The Menu-Size Complexity of Auctions
Sergiu Hart and Noam Nisan

Session 3b: Ad Auctions I
Chair: Sébastien Lahaie
Real-time Optimization of Personalized Assortments
Negin Golrezaei, Hamid Nazerzadeh and Paat Rusmevichientong
A Dynamic Axiomatic Approach to First-Price Auctions, 
Darrell Hoy, Kamal Jain and Chris Wilkens
Competition Among Asymmetric Sellers With Fixed Supply
Uriel Feige, Ron Lavi and Moshe Tennenholtz
12:40 - 2:00 PMLunch
2:10 - 3:30 PM
Session 4: Online Auctions
Chair: Ron Lavi 
Ranking and Tradeoffs in Sponsored Search Auctions
Ben Roberts, Dinan Gunawardena, Ian Kash and Peter Key
Whole-page Optimization and Submodular Welfare Maximization with Online Bidders
Nikhil R Devanur, Nitish Korula, Zhiyi Huang, Vahab Mirrokni and Qiqi Yan

Peaches, Lemons, and Cookies: Designing Auction Markets with Dispersed Information
Ittai Abraham, Susan Athey, Moshe Babaioff and Michael Grubb
Auctions for Online Display Advertising Exchanges: Approximations and Design
Santiago R. Balseiro, Omar Besbes and Gabriel Y. Weintraub
3:30 - 3:50 PMBreak
3:50 - 4:50 PM
Session 5a: Mechanism Design II
Chair: Jason Hartline
 
Cost-Recovering Bayesian Algorithmic Mechanism Design 
Hu Fu, Brendan Lucier, Balasubramanian Sivan and Vasilis Syrgkanis
Near-Optimal Multi-Unit Auctions with Ordered Bidders
Sayan Bhattacharya, Elias Koutsoupias, Janardhan ,Kulkarni Stefano Leonardi, Tim Roughgarden and Xiaoming Xu
Truthfulness and Stochastic Dominance with Monetary Transfers
Martin Hoefer, Thomas Kesselhei and Berthold Voecking
Session 5b: Price of Anarchy and Incentives
Chair: Nikhil R. Devanur
 
Risk Sensitivity of Price of Anarchy under Uncertainty
Georgios Piliouras, Evdokia Nikolova and Jeff S. Shamma
Improved Bounds on the Price of Stability in Network Cost Sharing Games
Euiwoong Lee and Katrina Ligett

Sincere and Sophisticated Players in the Envy-free Allocation Problem
Rodrigo Velez
4:55 - 6:15 PM
Session 6: Estimation and Forecasting
Chair: Michael Wellman
 
Primary-Market Auctions for Event Tickets: Eliminating the Rents of "Bob the Broker"
Eric Budish and Aditya Bhave
Measuring the Performance of Large-Scale Combinatorial Auctions: A Structural Estimation Approach
Sang Won Kim, Marcelo Olivares and Gabriel Weintraub
When Do Noisy Votes Reveal the Truth? 
Ioannis Caragiannis Ariel Procaccia and Nisarg Shah
A Combinatorial Prediction Market for the U.S. Elections
Miroslav Dudik, Sébastien Lahaie, David Pennock and David Rothschild
6:15 - 7:00 PMBusiness Meeting
7:00 - 8:30 PM

Poster Session
Wednesday, June 19, 2013
9:00 - 10:00 AM
Session 7: Mechanism Design III
Chair: Moshe Babaioff

Mechanism Design via Optimal Transport
Costis Daskalakis, Alan Deckelbaum and Christos Tzamos
Optimal and Near-Optimal Mechanism Design with Interdependent Values
Tim Roughgarden and Inbal Talgam-Cohen

Truthful Mechanisms for Agents that Value Privacy
Yiling Chen, Stephen Chong, Ian Kash, Tal Moran and Salil Vadhan
10:00 - 10:20 AM
Break
10:20 - 11:20 AM
Session 8a: Mechanism Design IV
Chair: Robert Kleinberg
 
Differential Pricing with Inequity Aversion in Social Networks
Noga Alon, Yishay Mansour and Moshe Tennenholtz
Approximation in Mechanism Design with Interdependent Values
Yunan Li

Accounting for Price Dependencies in Simultaneous Sealed-Bid Auctions
Brandon Mayer, Eric Sodomka, Amy Greenwald and Michael Wellman

Session 8b: Kidney Exchange
Chair: Aaron Roth


Failure-Aware Kidney Exchange
John Dickerson, Ariel Procaccia and Tuomas Sandholm

Harnessing the Power of Two Crossmatches
Avrim Blum, Anupam Gupta, Ariel Procaccia and Ankit Sharma

Kidney Exchange in Dynamic Sparse Heterogenous PoolsItai Ashlagi, Patrick Jaillet and Vahideh Manshadi

11:20 - 11:40 AM
Break
11:40 - 12:40 PM
Session 9a: Mechansim Design without Money I
Chair: Ariel Procaccia
Strategyproof Facility Location for Concave Cost Functions
Dimitris Fotakis and Christos Tzamos

Strategyproof Facility Location and the Least Squares Objective
Yoav Wilf and Michal Feldman

Loss Calibrated Methods for Bipartite Rationing
Herve Moulin and Jay Sethuraman

Session 9b: Public Goods and Networks
Chair: Arpita Ghosh
A Network Approach to Public Goods
Matt Elliott and Ben Golub

Empirical Agent Based Models of Cooperation in Public Goods GamesMichael Wunder, Siddharth Suri and Duncan Watts

Pricing Public Goods for Private Sale 
Michal Feldman, David Kempe, Brendan Lucier and Renato Paes Leme
12:40 - 2:00 PM
Lunch
2:00 - 3:20 PM
Session 10a: Social Networks
Chair: Jeff MacKie Mason 
Complex Contagion and the Weakness of Long Ties in Social Networks: Revisited
Roozbeh Ebrahimi, Golnaz Ghasemiesfeh and Jie Gao

Selection and Influence in Cultural Dynamics
David Kempe, Jon Kleinberg, Sigal Oren and Aleksandrs Slivkins
Incentives, Gamification, and Game Theory: An Economic Approach to Badge Design
David Easley and Arpita Ghosh

A Markov Chain Approximation to Choice ModelingJose Blanchet, Guillermo Gallego and Vineet Goyal

Session 10b: Complexity and Learning
Chair: Yishay Mansour 
Best-Response Dynamics Out of Sync
Roee Engelberg, Alex Fabrikant, Michael Schapira and David Wajc

The Empirical Implications of Rank in Bimatrix Games
Siddharth Barman, Umang Bhaskar, Federico Echenique and Adam Wierman

Learning Equilibria of Games via Payoff QueriesRahul Savani, John Fearnley, Martin Gairing and Paul Goldberg
Super-Efficient Rational ProofsPablo Azar and Silvio Micali
3:20 - 3:50 PMBreak
3:50 - 4:50 PM
Session 11: Networks
Chair: Jon Kleinberg 
Selection Effects in Online Sharing: Consequences for Peer Adoption
Sean J Taylor, Eytan Bakshy and Sinan Aral

Bertrand Networks
Moshe Babaioff, Brendan Lucier and Noam Nisan

Potential Games are Necessary to Ensure Pure Nash Equilibria in Cost Sharing Games
Ragavendran Gopalakrishnan, Jason Marden and Adam Wierman
6:00 - 10:00 PM

Conference Dinner
Thursday, June 20, 2013
Keynote Talk II
Chair: Preston McAfee
9:00 -10:00 AM
Kidney Exchange: Where We’ve Been and Where We Can Go From Here Alvin E. Roth
10:00 -10:20 AMBreak
10:20 - 11:20 AM
Session 13: Mechanism Design without Money II
Chair: Mallesh Pai

Unbalanced Random Matching Markets
Itai Ashlagi, Yashodhan Kanoria and Jacob Leshno

Existence of Stable Matchings in Large Markets with Complementarities

Eduardo Azevedo and John Hatfield

Mechanism Design for Fair Division
Richard Cole, Vasilis Gkatzelis and Gagan Goel
11:20 - 11:40 AMBreak
11:40 - 12:40 AM
Session 14a: Ad Auctions II
Chair: Noam Nisan

Budget Smoothing for Internet Ad Auctions: A Game Theoretic Approach
Denis Charles, Deeparnab Chakrabarty, Max Chickering, Nikhil R Devanur and Lei Wang
Revenue Optimization in the Generalized Second-Price Auction
David Thompson and Kevin Leyton-Brown
Auctions with Unique Equilibria
Shuchi Chawla and Jason Hartline
Session 14b: Matching
Chair: Itai Ashlagi


Designing for Diversity in Matching

Scott D Kominers and Tayfun Sonmez

Two-Sided Matching with Partial Information
Baharak Rastegari, Anne Condon, Nicole Immorlica and Kevin Leyton-Brown

House Allocation with Indifferences: A Generalization and a Unified View
Daniela Saban and Jay Sethuraman
12:40 - 2:00 PMLunch
2:10 - 3:30 PM
Session 15a: Crowd Sourcing in networks
Chair: Jenn Wortman Vaughan

Sybil-proof Mechanisms in Query Incentive Networks
Wei Chen, Wang Yajun, Dongxiao Yu and Li Zhang
On Discrete Preferences and CoordinationFlavio Chierichetti, Jon Kleinberg and Sigal Oren

Incentivizing Participation in Online Forums for Education
Arpita Ghosh and Jon Kleinberg

Privacy and Coordination: Computing on Databases with Endogenous Participation
Arpita Ghosh and Katrina Ligett


Session 15b: Online experience
Chair: Siddharth Suri

Pick Your Poison: Pricing and Inventories at Unlicensed Online Pharmacies
Nektarios Leontiadis, Tyler Moore and Nicolas Christin
Down-to-the-Minute Effects of Super Bowl Advertising on Online Search Behavior
Randall A Lewis and David Reiley

Optimizing Password Composition Policies
Jeremiah M Blocki, Saranga Komanduri, Ariel Procaccia and Or Sheffet

Latency Arbitrage, Market Fragmentation, and Efficiency: A Two-Market Model
Elaine Wah and Michael Wellman
3:30 - 3:50 PMBreak
3:50 - 4:50 PM
Session 16: Information and Networks
Chair: Nicole Immorlica

Robust Incentives for Information Acquisition, 
Gabriel Carroll
Social Learning and Aggregate Network Uncertainty
Ilan Lobel and Evan Sadler

Implementing the "Wisdom of the Crowd"
Ilan Kremer, Yishay Mansour and Motty Perry

4:50 PMEnd


Thursday, June 13, 2013

Is the set of stable matchings generically small? Ashlagi, Kanoria and Leshno on large random marriage markets

Suppose you have a matching market with two kinds of players, say each player of one kind owns a single left shoe and the other kind each owns a single right shoe, and they can earn $1 by assembling a pair of shoes.  Then if there are more left shoe owners than right shoe owners, the core of the game will give $1 to every right shoe owner and $0 to every left shoe owner. (Here's an old  experiment on such a game.)

The situation is very much less clear if the game isn't played for money, and if the players are not all identical. But in a surprising result, Itai Ashlagi, Yash Kanoria and Jacob Leshno have shown that in a two sided marriage model (in which each man has preferences over all the women and each women over all the men, so agents aren't at all identical), then even a slight imbalance in the sizes of the two sides of the market makes the set of stable matchings very small: Unbalanced random matching markets, by Itai Ashlagi, Yashodhan Kanoria, and Jacob D. Leshno.

"Abstract: We analyze large random matching markets with unequal numbers of men and women. We fi nd that being on the short side of the market confers a large advantage. For each agent, assign
a rank of 1 to the agent's most preferred partner, a rank of 2 to the next most preferred partner
and so forth. If there are n men and n + 1 women then, we show that with high probability, in
any stable matching, the men's average rank of their wives is no more than 3 logn, whereas the
women's average rank of their husbands is at least n/(3 logn). If there are n men and (1 +lamda )n
women for lamda> 0 then, with high probability, in any stable matching the men's average rank of
wives is O(1), whereas the women's average rank of husbands is Omega(n). Simulations show that
our results hold even for small markets."


We already knew that large matching markets have small sets of stable matchings when preference lists are short. This result suggests that small sets of stable matchings may arise for quite different reasons.

Wednesday, June 12, 2013

Who Gets What: video of a lecture I gave at Stanford GSB

One hour of market design (45 minutes of lecture, 15 of very good questions and my attempts to answer them...)




"Published on May 13, 2013
Stanford University Professor and 2012 Nobel Laureate Al Roth speaks on his prize-winning research and ground-breaking successes with exchange markets and his life-saving favorite, kidney exchanges.

Dr. Roth was the keynote speaker for the GSB Spring Reunions on May 3, 2013. He was introduced by Dean Garth Saloner.

Roth is the Craig and Susan McCaw Professor of Economics at Stanford University.

Related Links
http://alumni.gsb.stanford.edu/events...

Selected Works from Dr. Roth
  • Category

  • License

    Standard YouTube License"

Tuesday, June 11, 2013

Matching in Paris: conference this week

Workshop on “Advances in Mechanism Design”, June 11–12, 2013
Paris School of Economics, “Grande Salle”, 48 Boulevard Jourdan, 75014 Paris, France

Here's the program:
Tuesday, June 11
09:00 - 10:00: Fuhito Kojima (Stanford):
“Efficient Matching under Distributional Constraints: Theory and Applications”
10:00 - 11:00: Dorothea Kubler (WZB Berlin):
“Implementing Quotas in University Admissions: Experimental Evidence”
Coffee Break
11:30 - 12:30: Yinghua He (TSE):
“Competitive Equilibrium from Equal Incomes for Two-Sided Matching”
Lunch
14:00 - 15:00: Alfred Galichon (Sciences Po):
“The Roomate Problem Is More Stable Than You Think”
15:00 - 16:00: Estelle Cantillon (ULB):
“Endogenous Preferences and the Role of the Mechanism in School Choice”
Coffee Break
16:30 - 17:30: Eduardo Azevedo (U Penn):
“A Supply and Demand Framework for Two-Sided Matching Markets”

Wednesday, June 12
09:00 - 10:00: Jinwoo Kim (Seoul National U):
“Stable Matching in Large Economies”
10:00 - 11:00: Francis Bloch (Polytechnique):
“Dynamic Allocation of Objects to Queuing Agents”
Coffee Break
11:30 - 12:30: Sonia Jaffe (Harvard):
“Taxation in Matching Markets”
Lunch
14:00 - 15:00: Tadashi Hashimoto (Stanford):
“The Generalized Random Priority Mechanism with Budgets”
15:00 - 16:00: Clayton Featherstone (U Penn):
“A Rank-based Refinement of Ordinal Efficiency and a New (but familiar) Class of Ordinal
Assignment Mechanisms”
Coffee Break
16:30 - 17:30: Muriel Niederle (Stanford):
“Propose with a Rose? Signaling in Internet Dating Markets”

Matching news from Peter Biro: a conference volume, a summer school at the end of the month and a workshop in October

Peter Biro writes:

The proceedings of the Japanese-Hungarian Symposium is now available online:
with papers on stable matchings and flows from pages: 55, 65, 133, 225, 243, 301, 347

Our summer school starts in 2 weeks time with 83 participants (+speakers)

The COST Action will have a workshop on 16-18 October in Barcelona, organised locally by Flip. The topics will be matchings and information merging (WGs 3 and 4 of the action: http://www.illc.uva.nl/COST-IC1205/).

You would be very welcome there as well if you have time.

Monday, June 10, 2013

Operations Research Conference in Memory of Professor Uriel G. Rothblum (June 11, 2013)

I am in Israel to participate in a conference honoring my old friend Uri Rothblum. The instructions to the presenters were to try to present a talk that Uri would have liked to hear...



Technion honorary doctorate ceremony

The Technion will broadcast its honorary doctorate ceremony here: Honorary Doctors Ceremony - June 10, 2013 – 8:00 pm, 1:00 pm EDT, USA

I don't imagine that it will be gripping to watch, but I will be there. I served for a number of years on the Technion's Board of Governors, and I am in Israel for the memorial conference of my old friend Uri Rothblum.

Sunday, June 9, 2013

Honorary 7th dan black belt in JKA Shotokan karate, presented by Sensei Masataka Mori


When I was an undergraduate at Columbia University, from the Fall of 1968 through the summer of 1971, I spent a lot of time practicing Shotokan karate, which was very satisfying and which taught me that I could work harder than I had thought. Our instructor was the now legendary Sensei Masataka Mori, who came to New York in 1968, where he founded the NY Dojo, and also taught at Columbia.

It turns out that Nobel prizes are followed by other recognitions, and the most unexpected of those that I have received is that the Japan Karate Association in Tokyo has made me an honorary 7th-degree black belt, something that, given my athletic abilities, is even more unimaginable than being a Nobel laureate.

Sensei Mori came out to San Francisco earlier this year to make the presentation:  in the photo below, he and I are holding the certificate.


Next to me is my wife Emilie, and next to Sensei Mori is T.J. Stiles, the Pulitzer Prize/National Book Award winning biographer of Cornelius Vanderbilt (and Jesse James, too, but in a different book, it turns out that they weren't the same person:).  T.J. is a 5th dan black belt and the chief instructor of the JKA San Francisco dojo.

Behind the camera was Dr. Jacob Levitt, a 4th dan black belt who made the trip with Sensei Mori from New York, where he teaches and practices dermatology at Mt. Sinai Hospital.

Emilie and I felt that we were in the company of three unusually accomplished people.

Here is what I gather is an approximate English translation of the Japanese certificate:



Saturday, June 8, 2013

Information about live kidney donors, for those who need them

The Living Kidney Donors Network is organizing two webinars:

LKDN is Offering two Kidney Kampaign Webinars:

Click here to register for June 10, 2013, 7:00 PM - 8:00 PM CDT or

Click here to register for June 18, 2013, 7:00 - 8:00 PM CDT.

To learn more about the LKDN Webinars, Click Here
NEW link and information: Developing Your Kidney Kampaign. Click HERE
The Living Kidney Donors Network is a not-for-profit organization whose primary Mission is to educate people who need a kidney transplant about the living donation process and to prepare them to effectively communicate their need to family members and friends.

Friday, June 7, 2013

Notes on teachers and students from the rabbinical literature

As I get older I appreciate more the bonds between teachers and students. These aren't as recognized in modern literature as are other kinds of bonds, between parents and children, husbands and wives, brothers and sisters... One exception is in the rabbinical literature.

Here's a brief collection of quotes, I'd be glad to know of more.

Rabbi Yitzchok Etshalom Talmud Torah 5:13
13. The students add to the teacher's wisdom and expand his understanding. The sages said: I have learned much wisdom from my teacher, more from my colleagues and the most from my students (BT Ta'anit 7a); and just as a small piece of wood ignites a large one, similarly a small student sharpens the teacher['s mind] until he extracts from him, through his questions, wondrous wisdom.

alternate translation, from Maimonides, Laws of Torah Study, http://www.panix.com/~jjbaker/MadaTT.html chapt 5:
13) Students add to the wisdom of their Rabbi, and open his heart. The Sages said that they learnt more from their Rabbis than from their friends, but learnt even more from their students. Just as a small candle can light a big one so a student sharpens his Rabbi's wits, by extracting from him his wisdom by means of questions.

Pirkei avot: Chapter 1.1
The Men of the Great Assembly had three sayings:
Be deliberate in judging;
Educate many students;
Make a fence around the Torah.


Pirkei avot: (Chapte 1, 6) Joshua ben Perachyah and Nittai the Arbelite received the Torah from them. Joshua ben Perachyah said: Provide [make] for yourself a teacher and get [acquire] yourself a friend; and judge every man towards merit. http://www.shechem.org/torah/avot.html


Some commentaries have trouble with the first two clauses, and I've seen "get a friend" translated as "find someone to study with." But another way to understand it  (maybe, I'm no Talmud scholar) is that teachers and friends (and students and friends) can intersect and be the same folks...

5.12 12. There are four types of student. One who is quick to understand and quick to forget--his flaw cancels his virtue. One who is slow to understand and slow to forget--his virtue cancels his flaw. One who is quick to understand and slow to forget--his is a good portion. One who is slow to understand and quick to forget--his is a bad portion.

Sanhedren p105, side B: no man envies the accomplishments of his children or his students


"דאמר רב יוסי בר חוני בכל אדם מתקנא חוץ מבנו ותלמידו" "Reb Yossi bar Honi said 'of everyone a man is envious except his son and his student'."
( סנהדרין • קה ב )

*******
update: I should note that another literature/tradition in which bonds between teachers and students are noted is in martial arts .

Update: Charlie Nathanson reminds me of  Perkei Avot chapter 4, verse 12 (https://www.sefaria.org/Pirkei_Avot.4.12

רַבִּי אֶלְעָזָר בֶּן שַׁמּוּעַ אוֹמֵר, יְהִי כְבוֹד תַּלְמִידְךָ חָבִיב עָלֶיךָ כְּשֶׁלְּךָ, וּכְבוֹד חֲבֵרְךָ כְּמוֹרָא רַבְּךָ, וּמוֹרָא רַבְּךָ כְּמוֹרָא שָׁמָיִם:

"Rabbi Elazar ben Shammua said: let the honor of your student be as dear to you as your own, and the honor of your colleague as the reverence for your teacher, and the reverence for your teacher as the reverence of heaven."

Thursday, June 6, 2013

Kidney exchange between Jewish and Arab families in Israel

Kidney exchange erases boundaries, here's the story from Haaretz (in Hebrew, with Google translate:)

דו קיום: ערבייה תרמה כליה ליהודי; בנו תרם לערבי


Coexistence: Jews receive Arab donated kidney; son contributed to an Arab
Cross-transplant saved lives - and put hearts: the wife of Muhammad Eckert Haifa donated a kidney to Ben Yair. Exchange contributed son of Yair kidney to her husband. "For them it does not matter who contributed to whom. Them they saved the family" 



A more usual story is of ordinary deceased donation: here's one from the Jerusalem Post
Jewish kidney donation saves Palestinian boy
"Kidney of Israeli boy who suffered brain death saves Palestinian child; Peres: We are proud of your contribution to peace."

Wednesday, June 5, 2013

Conference in Memory of Jean Francois Mertens, Jerusalem, June 6,7, and 9.

Conference in Memory of Jean Francois Mertens, Jerusalem, June 6,7, and 9.

Thursday, June 6
09:00 – 09:30 Welcome
09:30 – 10:15 Robert J. Aumann , “My Jean-François”
10:15 – 11:00 Françoise Forges, “Bayesian Repeated Games”
11:00 – 11:30 Break
11:30 – 12:15 Claude d'Aspremont, “Some Remarks on Bayesian Incentive Compatibility and the Core in the Absence of Wealth Effects”
12:15 – 13:00 Hari Govindan, “Toward a Theory of Stability in Repeated Games”
(joint with Aldo Rustichini and Bob Wilson)
13:00 – 14:30 Lunch
14:30 – 15:15 François Maniquet, “Strategic Voting under Proportional Representation”
15:15 – 16:00 Anna Rubinchik, “Regularity and Stability of Equilibria in an Overlapping Generations Model with Exogenous Growth” (joint with Jean François-Mertens)
16:00 – 16:15 Break
16:15 – 17:00 Sergiu Hart, “Correlated Equilibria: Markets, Dynamics, and Computation”

Friday, June 7
09:30 – 10:15 Alvin Roth, “Deceased Organ Donation and Solicitation in Israel and the U.S”
10:15 – 11:00 Geoffroy de Clippel , “Egalitarianism under Incomplete Information”
11:00 – 11:30 Break
11:30 – 12:15 Olivier Gossner , “The Value of Information in Zero-Sum Games” (joint with Jean- François Mertens)
12:15 – 13:00 Yair Tauman ,“Voting Power and Proportional Representation of Voters”
(joint with Artyom Jelnov)
13:00 – 14:30 Lunch
14:30 – 15:15 Elon Kohlberg , “The Shapley Value of Stochastic Games”
Sunday, June 9
09:30 – 10:15 Eric Maskin , “Markov Equilibrium” (joint with Jean Tirole)
10:15 – 11:00 Bernard de Meyer, “Risk Aversion and Price Dynamics on the Stock Market”
11:00 – 11:30 Break
11:30 – 12:15 Adi Karni & Jacques Drèze , “Subjective Expected Utility with State-Dependent Utility and ActionDependent Probabilities”
12:15 – 13:00 Pierre Dehez , “How to Share Joint Liability: A Cooperative Game Approach”
(joint with Samuel Ferey)
13:00 – 14:30 Lunch
14:30 – 15:15 Abraham Neyman , “Continous-Time Stochastic Games”
15:15 – 16:00 Shmuel Zamir , “The MZ Formula: Origins and Recent Application”
16:00 – 16:15 Break
16:15 – 17:00 Roger Myerson , “Settled Equilibria” (joint with Jörgen Weibull)

Tuesday, June 4, 2013

Jerusalem School in Economic Theory: Decision Making: June 10-19 2013



The 24th Jerusalem School in Economic Theory

Decision Making

Lecturers
Maya Bar-HillelHebrew University
Itzhak GilboaTel Aviv University
Daniel KahnemanPrinceton University
David LaibsonHarvard Universit
Mark MachinaUniversity of California, San Diego
Eric MaskinHarvard Universit
Wolfgang PesendorferPrinceton University
Ariel RubinsteinTel Aviv University
Eyal  WinterHebrew University
 Decision making is at the heart of economics: production, exchange, and consumption are all the result of choices made by individual agents. For over sixty years, the benchmark framework for studying agents' decisions whose consequences are uncertain has been the expected utility model. But anomalies from experimental work in psychology and behavioral economics have led to revisions of expected utility and of utility theory more generally. The Summer School will explore both the standard model and some of the most important alternatives

Here's the program (Manny Yaari speaks about Newcomb's paradox on the last day, although he's not listed as one of the 'lecturers'...)

Monday, June 3, 2013

2013 Results and Data Book from NRMP’s Main Residency Match

Here's the press release: 2013 Results and Data Book from NRMP’s Main Residency Match, and here's the data book for the 2013 Match

The data book also reports on the second year of the new SOAP scramble, but not in the same detail as last year's report. Last year I predicted that more of the visible action would move to the first round (reflecting more action before the beginning of the official scramble), but this year's data book doesn't give that information.

Here's the press release, though, which gives a good overview of the data, which seem to reflect a successful match year.

The National Resident Matching Program® (NRMP®) is pleased to announce the publication of its Results and Data 2013 Main Residency Match --- the most comprehensive Match data resource produced annually by the NRMP. The report provides statistics on the most successful Match in NRMP history, in which 28,130 of 29,171 available residency positions were filled.    
Included in the report are statistical tables and data graphs from the Main Residency Match and a state by state breakdown of each participating U.S. residency training program, with the number of positions offered and filled for each. This year, for the first time, the report includes results and charts from the Match Week Supplemental Offer and Acceptance Program® (SOAP®)-- the process used by NRMP for unfilled residency positions.
This year’s Results and Data Book is notable because the 2013 Match was the first to utilize NRMP’s All In Policy, which requires participating programs to register and attempt to fill all their positions through The Match.
NRMP Executive Director Mona M. Signer said, “Readers of the 2013 Results and Data Book will see the overwhelming success of the All In Policy. The 2013 Match produced the highest fill rate in NRMP history, and match rates rose for nearly every applicant group.”
Results and Data 2013 Book Facts
Applicant Numbers (Comparisons to 2012) 
  • 40,335 registrants (1,958 more)
  • 34,355 active applicants (3,000 more)
  • 17,487 U.S. allopathic medical school seniors (960 more)
  • 2,677 osteopathic medical school students/graduates (317 more, highest ever)
  • 5,095 U.S. citizen international medical school students/graduates (U.S. IMGs) (816 more)
  • 7,568 non-U.S. citizen international medical school students/graduates (IMGs) (740 more)
Applicant Match Rates 
  • 74.1 percent of all applicants were matched to PGY-1 positions
  • 93.7 percent of U.S. allopathic seniors matched to PGY-1 positions; of those, 78.8 percent matched to one of their top three choices
  • 53.1 percent of U.S. IMGs were matched to PGY-1 positions, up from 49.1 percent in 2012 and the highest Match rate for this applicant group since 2005
  • 47.6 percent PGY-1 Match rate for IMGs, an increase of seven percentage points from 2012
Increased Positions/High Fill Rates
Available residency positions increased to 29,171, 2,399 (9 percent) more than in 2012, when 26,772 positions were offered. The increase is due primarily to implementation of the All In Policy, which resulted in some specialties offering significantly more positions in 2013. Internal Medicine offered 1,000 more positions, Family Medicine offered 297 more, and Pediatrics offered 141 more than the prior year.
The overall position fill rate increased 1.1 percentage points to 96.4 percent, the highest in NRMP history. In 2013, only 1,041 first-year and second-year positions were unfilled; of those, 939 were placed in SOAP, and all but 61 were filled.
Notable Specialties
Often Match results can be an indicator of competitiveness. This year, several specialties and specialty tracks had 100 percent fill rates: 
  • Medicine Emergency Medicine
  • Pediatrics Primary
  • Pediatrics/Psychiatry/Child Psychiatry
  • Physical Medicine and Rehabilitation – Post graduate year one (PGY-1)
  • Plastic Surgery – Post graduate year two (PGY-2)
  • Psychiatry Family Medicine
  • Radiation Oncology (PGY-1)
  • Thoracic Surgery
The following specialties filled more than 90 percent of positions with U.S. seniors: 
  • Plastic Surgery: 95.7 percent
  • Otolaryngology: 94.5 percent
  • Neurological Surgery: 93.1 percent
  • Orthopedic Surgery: 91.8 percent
Couples in the Match
In 2013, a record 1,870 applicants (935 couples) participated in the 2013 Match. They continued to enjoy great success with a match rate of 95.2 percent. Couples have been able to participate together in The Match since 1984. The two partners identify themselves as a couple to the NRMP and submit rank order lists of identical length. The algorithm treats their lists as a unit, matching the couple to the highest linked program choices where both partners match.
SOAP - Supplemental Offer and Acceptance Program
The NRMP launched the Match Week SOAP in 2012 to replace the "Scramble" and to streamline the process for unmatched applicants and the directors of unfilled programs. During SOAP, eligible applicants use ERAS® to apply to programs with unfilled positions and offers are extended to applicants based upon the number of unfilled positions remaining in the program.
U.S. seniors accepted the majority of positions (595 of 878) filled during SOAP. More than 13,808 applicants were SOAP-eligible, 261 more than in 2012. This year, 406 unfilled programs elected to participate in SOAP, offering 939 of the 1,041 positions not filled when the matching algorithm was processed.
A total of 1,327 offers were sent to applicants. By the conclusion of SOAP, 93.5 percent (878 of 939) of the positions had been filled.
How the Match Works
Conducted annually by the NRMP, The Match uses a computerized mathematical algorithm to align the preferences of applicants with the preferences of residency program directors in order to fill the training positions available at U.S. teaching hospitals. Research on the NRMP algorithm was a basis for Dr. Alvin Roth’s receipt of the 2012 Nobel Prize in Economics.
# # #
The National Resident Matching Program® (NRMP®) is a private, non-profit organization established in 1952 at the request of medical students to provide an orderly and fair mechanism for matching the preferences of applicants for U.S. residency positions with the preferences of residency program directors. In addition to the Main Residency Match, the NRMP conducts matches for more than 40 subspecialties. For more information, contact NRMP at 1-866-653-NRMP (6767) or visit http://www.nrmp.org. For interviews, please email cherbert@nrmp.org.


Read more: http://www.digitaljournal.com/pr/1278215#ixzz2V7ttPAqX

Sunday, June 2, 2013

Breadwinner wives

In his NY Times column, Dick Thaler writes about the "interesting new paper by Marianne Bertrand, Emir Kamenica and Jessica Pan, three economists who are colleagues of mine at the University of Chicago’s Booth School of Business. They found that traditional views of gender identity, particularly the view that the right and proper role of the husband is to make more money than the wife, are affecting choices of whom to marry, how much to work, and even whether to stay married."

 He ends with this:
"But now back to the notion of couples’ contentment: Is there any way to tell whether it’s the wife or the husband who becomes unhappy when the wife earns more? Does he think that she is threatening his manliness, or does she think that he’s a slacker?
That may be impossible to answer, partly because of something I learned long ago from Alvin E. Roth, a Nobel laureate in economics last year. I call it Roth’s rule: In equilibrium, it’s impossible for you to be happier than your spouse.
If you and your spouse both understand that rule, you’re both likely to be happier — regardless of how much money either of you make."

Saturday, June 1, 2013

Matt Jackson on market design



Matthew O. Jackson 


Stanford University - Department of Economics; Santa Fe Institute; Canadian Institute for Advanced Research (CIFAR)

April 10, 2013

Abstract:      
I provide a brief introduction to the early literatures on Matching, Auctions, and Market Design.

The design of matching markets and auctions has brought economic theory and practice together. Indeed, this is an area where microeconomic theory has had its largest direct impact. This is in part because it focuses on settings where people interact according to very clearly delineated rules. Thus, the strategic interactions of the participants are relatively easy to model, and outcomes are comparatively straightforward to assess relative to the many other less structured interactions that occur in an economy. In view of this, these are arenas where economic theory has directly shaped institutions ranging from the systems by which students are assigned to public schools to the manner in which governments have auctioned to the rights to parts of the broadcast spectra in particular geographic regions.