John W. Emerson (Jay)

Department of Statistics
Yale University

Full Curriculum Vitae

Associate Professor of Statistics, Adjunct

Director of Graduate Studies

Fellow, Jonathan Edwards College
Secretary of the Senior Common Room

Twitter: @johnwemerson


Contact Information


    Telephone: (203) 432-0638
    Office: 24 HH, Room B06

    Mailing addresses

In The News...

Federal Aid Eligibility

2/5/2014: More Olympic Figure Skating

4/8/2013: NCAA Brackets

2/17/2012: SEC probe of ETFs
2/23/2010: Figure Skating coverage in
2/26/2010: Figure Skating: The Drama Continues
2/17/2010: Figure Skating: the Problem and the Olympic Pairs Analysis
1/28/2010: A well-presented blog of the 2010 EPI
The Statesman 1/28/10: 2010 Environmental Performance Index
Wall Street Journal 6/20/2008: World's Greatest Athlete: How we did it
Wall Street Journal 4/24/2008: citation by The Numbers Guy
Chance, On and Off the Ice (CHANCE, Spring 2007)
Stock Options Backdating wins Pulitzer Prize (4/16/2007)
Wall Street Journal 3/31/07: Reservations at Top Restaurants
The Game: Yale-Harvard Football
Figure Skating Results and Analysis from the 2006 Olympic Games
Wall Street Journal 3/23/06: The Perfect Bracket (basketball predictions)
Wall Street Journal 3/18/06: The Perfect Payday
          (stock options backdating: citation in methods)
March Madness '05 Predictions

Of interest...

The Bigmemory Project: R packages available now! For massive matrices in R, including support for shared memory.

BH: R package for using Boost libraries

YaleToolkit: Includes gpairs(), barcode(), whatis(), sparkmat() and more!

gpairs: The generalized pairs plot

barcode: The barcode plot

bcp: R package for Bayesian change point analysis (JSS paper).

Don't drown in the data: big data and advice for students

Preprint: Scalable Strategies for Computing with Massive Data: to appear in the Journal of Statistical Software.

Amazon EC2, Big Data, and High-Performance Computing: from the Newsletter of the Sections on Statistical Computing and Graphics.

Links I Frequently Use

    Classes Server
    Yale Directory
    Fantasy Football
    200 years of history
    Graduate Advising
    TF Dashboard


    100b: Introductory Statistics
    128b: Real-World Statistics
    230/530b: Introductory Data Analysis
    242/542b: Theory of Statistics
    361/661a: Advanced Data Analysis
    625a: Statistical Case Studies
    626b: Practical Work
    627b: Statistical Consulting
    662a: Computational Statistics

Oxford University
R Stuff and Data Links

    Generalized scatterplot matrices: gpairs
    Data examination: whatis
    Mosaic Plots
    Barcode Plots
    Data mining data
    Data on Amazon web services


   Fiero ('95-'00)
   Miata ('99-'01)
   Blue Jag ('01-'03)
   Red Jag ('03-'04)
   Mustang ('05-'07)

Williams College
Recent Talks

    2015 RBras Keynote Address

Peking University

Yale University

"To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of." - Sir Ronald A Fisher

"The plural of anecdote is not data." - Roger Brinner

"The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data." - John Tukey

Yale Center for Analytical Sciences (YCAS)