Friday, January 5, 2018

Black markets in guns without serial numbers

The WSJ has the story:

The Rise of Untraceable ‘Ghost Guns’
An emerging black-market gun-making industry lets buyers bypass background checks and gun regulations, authorities say

"The number of these weapons in the U.S. is unknown. Because the guns bear no serial numbers, the Bureau of Alcohol, Tobacco, Firearms and Explosives is unable to track them. Serial numbers and gun registration play a key role in police and government investigations, allowing officers to trace a weapon’s history and owners.

"Ghost guns appear to be most prevalent in California, where there are restrictions on assault weapons that make it difficult to buy guns that are available in other states. But the firearms have been seized in criminal investigations in other states, including Arizona, Maryland, New York and Texas.
...
"“It went from being a niche group of people that were into the gun culture that were the ones making them for themselves,” said Mr. Barlowe. “Now, they’ve become so commonplace we’re buying them from 17-year-old gang-members on the street.”

"The starting point for building a ghost gun is an “unfinished receiver,” a metal or polymer piece that houses the firing mechanism. It can be purchased online without a background check, because the ATF doesn’t classify the part as a firearm.
...
"“There is a loophole under federal law that allows an individual to make a firearm,” said  Justin Lee, a federal prosecutor in Sacramento who has handled several ghost gun cases. “That loophole only extends to that person. The person breaks the law as soon as they are transferring that firearm.”
...
"The prevalence of online retailers and YouTube instructional videos has given ghost guns a boost, according to Mr. Barlowe. He said illicit gun dealers can buy parts for an AR-15 style rifle for about $700, put in a few hours of sweat equity, and sell it on the street for $1,000 to $2,000.
...
"Gun-owners distrustful of registering their firearms with the government also are customers. “Unserialized, Unregistered” is the slogan for GhostGuns.com, which sells handgun kits, unfinished receivers, and other items. Kyle Martin, president of Ghost America LLC, which runs the site, said customers “want to enjoy their complete freedom as American citizens.”

Thursday, January 4, 2018

Some ASSA sessions I would go to if I could, and some I'll certainly attend

I'm going to be a busy boy at the AEA/ASSA meetings, since as president of the AEA I'll preside over many champagne receptions and a few other things.  But the conference looks like fun. Here are just a few of the sessions that particularly caught my eye, even though I have conflicts with some of them...

Econometric Society Presidential Address



Session/Event

 Thursday, Jan. 4, 2018   5:30 PM - 7:00 PM

 Marriott Philadelphia Downtown, Liberty Ballroom
Hosted By: ECONOMETRIC SOCIETY
    Econometric Society Presidential Address
    Drew Fudenberg, Massachusetts Institute of Technology
    Speaker(s)
    Drew Fudenberg
    ,
    Massachusetts Institute of Technology
    Topic: Learning, Experimentation, and Equilibrium Refinements
    ************

    Economic Applications of Machine Learning



    Paper Session

     Friday, Jan. 5, 2018   8:00 AM - 10:00 AM

     Marriott Philadelphia Downtown, Liberty Ballroom Salon A
    Hosted By: AMERICAN ECONOMIC ASSOCIATION
    • Chair: Daniel BjörkegrenBrown University

    A Large Scale Model of Travel Time and User Choice Behavior

    Susan Athey
    ,
    Stanford University
    Robert Donnelly
    ,
    Stanford University

    Behavior Revealed in Mobile Phone Usage Predicts Loan Repayment

    Daniel Björkegren
    ,
    Brown University
    Darrell Grissen
    ,
    Entrepreneurial Finance Lab

    Estimating Poverty and Wealth From Mobile Phone Data

    Joshua Blumenstock
    ,
    University of California-Berkeley
    Gabriel Cadamuro
    ,
    University of Washington
    Robert On
    ,
    University of California-Berkeley

    Forecasting Economic Activity With Yelp Data

    Edward Glaeser
    ,
    Harvard University
    Hyunjin Kim
    ,
    Harvard Business School
    Michael Luca
    ,
    Harvard Business School
    Discussant(s)
    Michael Luca
    ,
    Harvard Business School
    Marshall Burke
    ,
    Stanford University
    Greg Lewis
    ,
    Microsoft Research
    Shane Greenstein
    ,
    Harvard Business School
    ************

    Like Everybody Else: Experimental Economics of Conformity, Image, and Identity



    Paper Session

     Friday, Jan. 5, 2018   2:30 PM - 4:30 PM

     Marriott Philadelphia Downtown, Meeting Room 305
    Hosted By: ECONOMIC SCIENCE ASSOCIATION
    • Chair: James AndreoniUniversity of California-San Diego

    Identity and Impact in Public Goods Contributions: A Field Experiment on Wikipedia

    Yan Chen
    ,
    University of Michigan
    Rosta Farzan
    ,
    University of Pittsburgh
    Robert Kraut
    ,
    Carnegie Mellon University
    Iman YeckehZarre
    ,
    University of Michigan
    Ark Fangzhou Zhang
    ,
    University of Michigan

    Status Goods: Experimental Evidence From Platinum Credit Cards

    Leonardo Bursztyn
    ,
    University of Chicago and NBER
    Bruno Ferman
    ,
    Getulio Vargas Foundation
    Stefano Fiorin
    ,
    University of California-San Diego
    Martin Kanz
    ,
    World Bank
    Gautam Rao
    ,
    Harvard University and NBER

    Preference Endogeneity and Conformity

    Douglas Bernheim
    ,
    Stanford University
    Christine Exley
    ,
    Harvard Business School

    The Conformity Trap: Adaptation and Stagnation of Social Norms in a Changing World

    James Andreoni
    ,
    University of California-San Diego
    Nikos Nikiforakis
    ,
    New York University Abu Dhabi
    Simon Siegenthaler
    ,
    University of Texas-Dallas
    Discussant(s)
    Alain Cohn
    ,
    University of Michigan
    Desmond Ang
    ,
    University of California-San Diego
    Florian Ederer
    ,
    Yale University
    Ariel Rubinstein
    ,
    New York University
    *********

    Large Matching Markets



    Saturday, Jan. 6, 2018   8:00 AM - 10:00 AM

     Marriott Philadelphia Downtown, Meeting Room 406
    Hosted By: ECONOMETRIC SOCIETY
    • Chair: SangMok LeeUniversity of Pennsylvania

    The Cutoff Structure of Top Trading Cycles in School Choice

    Jacob D. Leshno
    ,
    Columbia University
    Irene Lo
    ,
    Columbia University

    Need Versus Merit: The Large Core of College Admissions Markets

    Avinatan Hassidim
    ,
    Bar-Ilan University
    Assaf Romm
    ,
    Hebrew University of Jerusalem
    Ran I. Shorrer
    ,
    Pennsylvania State University

    Top Trading Cycles in Two-Sided Matching Markets: An Irrelevance of Priorities in Large Matching Markets

    Yeon-Koo Che
    ,
    Columbia University
    Olivier Tercieux
    ,
    Paris School of Economics
    Discussant(s)
    Eduardo Azevedo
    ,
    University of Pennsylvania
    Utku Unver
    ,
    Boston College
    Scott Duke Kominers
    ,
    Harvard University
    Atila Abdulkadiroglu
    ,
    Duke University
    *************

    Inner Workings of Organ Markets and Organ Allocation


    Paper Session

     Saturday, Jan. 6, 2018   2:30 PM - 4:30 PM

     Pennsylvania Convention Center, 201-C
    Hosted By: AMERICAN ECONOMIC ASSOCIATION
    • Chair: Eric BudishUniversity of Chicago

    The Inner Workings of Kidney Exchange Markets

    Nikhil Agarwal
    ,
    Massachusetts Institute of Technology
    Itai Ashlagi
    ,
    Stanford University
    Eduardo Azevedo
    ,
    University of Pennsylvania
    Clayton Featherstone
    ,
    University of Pennsylvania
    Omer Karaduman
    ,
    Massachusetts Institute of Technology

    A Regulated Market for Kidneys

    Mohammad Akbarpour
    ,
    Stanford University

    Strategic Behavior in the Kidney Waitlist

    Nikhil Agarwal
    ,
    Massachusetts Institute of Technology
    Itai Ashlagi
    ,
    Stanford University
    Paulo J. Somaini
    ,
    Stanford University
    Discussant(s)
    Utku Unver
    ,
    Boston College
    Glen Weyl
    ,
    Microsoft Research
    Benjamin R. Handel
    ,
    University of California-Berkeley
    ******

    Here are some sessions I'm looking forward to attending ex officio:


    AEA/AFA Joint Luncheon - Fee Event


     Friday, Jan. 5, 2018   12:30 PM - 2:15 PM

     Marriott Philadelphia Downtown, Grand Ballroom Salon G & H
    Hosted By: AMERICAN ECONOMIC ASSOCIATION & AMERICAN FINANCE ASSOCIATION
    • Chair: David ScharfsteinHarvard Business School
    Presiding: David Scharfstein, Harvard Business School
    Speaker: Raghuram Rajan, University of Chicago
    Speaker(s)
    Raghuram Rajan
    ,
    University of Chicago
    Topic: Liquidity and Leverage
    ************

    Session/Event

     Friday, Jan. 5, 2018   4:45 PM - 5:45 PM

     Marriott Philadelphia Downtown, Grand Ballroom Salon G & H
    Hosted By: American Economic Association
      Speaker: David Laibson, Harvard University
        *************


        AEA Nobel Laureate Luncheon-Fee Event

        Session/Event

         Saturday, Jan. 6, 2018   12:30 PM - 2:15 PM

         Marriott Philadelphia Downtown, Grand Ballroom Salon G & H
        Hosted By: AMERICAN ECONOMIC ASSOCIATION
        • Chair: Olivier BlanchardPeterson Institute for International Economics
        Nobel Laureate Luncheon Honoring the 2016 Nobel Laureates in Economics: Oliver Hart, Harvard University and Bengt R. Holmstrom, Massachusetts Institute of Technology--Fee Event--
        Presiding: Olivier Blanchard, Peterson Institute for International Economics--
        Speakers: Daron Acemoglu, Massachusetts Institute of Technology and Luigi Zingales, University of Chicago
        **********

        AEA Awards Ceremony and Presidential Address

        Session/Event

         Saturday, Jan. 6, 2018   4:30 PM - 5:45 PM

         Marriott Philadelphia Downtown, Grand Ballroom Salon G & H
        Hosted By: AMERICAN ECONOMIC ASSOCIATION
        • Chair: Olivier BlanchardPeterson Institute for International Economics
        Awards Ceremony & Presidential Address
        Presiding: Olivier Blanchard, Peterson Institute for International Economics
        Speaker: Alvin E. Roth, Stanford University
        Topic: Markets and Marketplaces
        ****************

        New Insights on Classic Questions in Matching Theory

        Paper Session

         Sunday, Jan. 7, 2018   10:15 AM - 12:15 PM

         Marriott Philadelphia Downtown, Liberty Ballroom Salon A
        Hosted By: AMERICAN ECONOMIC ASSOCIATION
        • Chair: Alvin E. RothStanford University

        Deferred Acceptance with Compensation Chains

        Piotr Dworczak
        ,
        Stanford University

        Virtual Demand and Stable Mechanisms

        Jan Christoph Schlegel
        ,
        University of Lausanne

        Lone Wolves in Competitive Equilibria

        Ravi Jagadeesan
        ,
        Harvard University
        Scott Duke Kominers
        ,
        Harvard University
        Ross Rheingans-Yoo
        ,
        Harvard University
        Discussant(s)
        Alexander Teytelboym
        ,
        University of Oxford