Bi-Weekly Complex Systems Seminar

February 2, 2015
By

For those near the University of Pennsylvania, the Complex Systems Seminar Series is sponsored by the Bassett Lab and is held on the 1st and 3rd Friday of each month at noon in 337 Towne Hall.The seminar series seeks to bring speakers from a variety of...

Read more »

Detect empty parameters that are passed to a SAS/IML module

February 2, 2015
By
Detect empty parameters that are passed to a SAS/IML module

A SAS/IML programmer asked a question on a discussion forum, which I paraphrase below: I've written a SAS/IML function that takes several arguments. Some of the arguments have default values. When the module is called, I want to compute some quantity, but I only want to compute it for the […]

Read more »

IASC Data Analysis Competition 2015

February 2, 2015
By
IASC Data Analysis Competition 2015

The International Association for Statistical Computing (IASC) is holding a Data Analysis Competition. Winners will be invited to present their work at the Joint Meeting of IASC-ABE Satellite Conference for the 60th ISI WSC 2015 to be held at Atlântico Búzios Convention & Resort in Búzios, RJ, Brazil (August 2–4, 2015). They will also be […]

Read more »

Don’t teach significance testing – Guest post

February 2, 2015
By
Don’t teach significance testing – Guest post

The following is a guest post by Tony Hak of Rotterdam School of Management. I know Tony would love some discussion about it in the comments. I remain undecided either way, so would like to hear arguments. GOOD REASONS FOR NOT TEACHING … Continue reading →

Read more »

Don’t teach significance testing – Guest post

February 2, 2015
By
Don’t teach significance testing – Guest post

The following is a guest post by Tony Hak of Rotterdam School of Management. I know Tony would love some discussion about it in the comments. I remain undecided either way, so would like to hear arguments. GOOD REASONS FOR NOT TEACHING … Continue reading →

Read more »

This has nothing to do with the Super Bowl

February 2, 2015
By

Joshua Vogelstein writes: The Open Connectome Project at Johns Hopkins University invites outstanding candidates to apply for a postdoctoral or assistant research scientist position in the area of statistical machine learning for big brain imaging data. Our workflow is tightly vertically integrated, ranging from raw data to theory to answering neuroscience questions and back again. […] The post This has nothing to do with the Super Bowl appeared first on…

Read more »

2015.2: Did the New England Patriots experience a decrease in fumbles starting in 2007?

February 1, 2015
By
2015.2: Did the New England Patriots experience a decrease in fumbles starting in 2007?

Here's a timely guest entry from Jeffrey Witmer (Oberlin College). As the “Deflate Gate” saga was unfolding, Warren Sharp analyzed “touches per fumble” for NFL teams before and after 2006, when a rule was changed so that teams playing on the r...

Read more »

GAS workshop

February 1, 2015
By
GAS workshop

The General Application Section (GAS) of the Royal Statistical Society has asked us to reenact the session Richard Nixon, Chris Jackson and I did at Bayes Pharma last year on Bayesian methods in health economic evaluation. In fact, ...

Read more »

Some 3D Graphics (rgl) for Classification with Splines and Logistic Regression (from The Elements of Statistical Learning)

February 1, 2015
By
Some 3D Graphics (rgl) for Classification with Splines and Logistic Regression (from The Elements of Statistical Learning)

This semester I'm teaching from Hastie, Tibshirani, and Friedman's book, The Elements of Statistical Learning, 2nd Edition. The authors provide a Mixture Simulation data set that has two continuous predictors and a binary outcome. This data is used to demonstrate classification procedures by plotting classification boundaries in the two predictors. For example, the figure below … Continue reading Some 3D Graphics (rgl) for Classification with Splines and Logistic Regression (from…

Read more »

Oh, it’s so frustrating when you’re trying to help someone out, and then you realize you’re dealing with a snake.

February 1, 2015
By

This happens sometimes. Someone comes to you with a request, maybe it’s a student or a potential student or just someone who has a question relating to your field of expertise. You’re in a good mood so you decide to help out, or maybe you feel it’s your duty to be helpful, or, who knows, […] The post Oh, it’s so frustrating when you’re trying to help someone out, and…

Read more »

Unemployment

February 1, 2015
By
Unemployment

Beginning 2013 I made a post plotting unemployment in Europe. Last year I did the same. Now that the unemployment numbers of December are on Eurostat, I am making them again. The plots shown are unemployment and its first derivative, both smoothed.You ...

Read more »

2015 Saturday Night Brainstorming and Task Forces: (4th draft)

February 1, 2015
By
2015 Saturday Night Brainstorming and Task Forces: (4th draft)

Saturday Night Brainstorming: The TFSI on NHST–part reblog from here and here, with a substantial 2015 update! Each year leaders of the movement to “reform” statistical methodology in psychology, social science, and other areas of applied statistics get together around this time for a brainstorming session. They review the latest from the Task Force on Statistical […]

Read more »

Documenting a class-participation activity

January 31, 2015
By
Documenting a class-participation activity

Tian Zheng implemented my candies demo using Legos: Also lots of details on the results. The point here is not exactly what happened (but, yes, the demo did work) but rather the idea that you can use photos and graphs to document what worked in class. We should be able to do this sort of […] The post Documenting a class-participation activity appeared first on Statistical Modeling, Causal Inference, and…

Read more »

Some Suggested Reading

January 31, 2015
By
Some Suggested Reading

Bahoc, F., H. Leeb, and B. M. Potscher, 2014. Valid confidence intervals for post-model-selection predictors. Working Paper, Department of Statistics, University of Vienna.Baumeister, C. and J. D. Hamilton, 2014. Sign restrictions, structural vector au...

Read more »

Economics/sociology phrase book

January 31, 2015
By

Mark Palko points me to this amusing document from Jeffrey Smith and Kermit Daniel, translating sociology jargon into economics and vice-versa. Lots of good jokes there. Along these lines, I’ve always been bothered by economists’ phrase “willingness to pay” which, in practice, often means “ability to pay.” And, of course, “earnings” which means “how much […] The post Economics/sociology phrase book appeared first on Statistical Modeling, Causal Inference, and Social…

Read more »

On verbal categories for the interpretation of Bayes factors

January 30, 2015
By

As Bayesian analysis is becoming more popular, adopters of Bayesian statistics have had to consider new issues that they did not before. What is makes “good” prior? How do I interpret a posterior? What Bayes factor is “big enough”? Although the theoretical arguments for the use of Bayesian statistics are very strong, new and unfamiliar ideas can cause uncertainty in new adopters. Compared to the cozy certainty of \(p<.05\), Bayesian…

Read more »

More than Word

January 30, 2015
By
More than Word

I know this will sound childish and possibly snobbish. But for some reason (mostly because of several collaborative papers I'm working on at the moment with colleagues that do not use LaTeX), I have spent a good 90% of my working time on MS Word, in th...

Read more »

Solutions to exercises of DBDA2E through chapter 18 now available

January 30, 2015
By
Solutions to exercises of DBDA2E through chapter 18 now available

Exercise Solutions for Chapters 1-18 of DBDA2E are now available at the book's web site.

Read more »

Precision medicine may never be very precise – but it may be good for public health

January 30, 2015
By
Precision medicine may never be very precise – but it may be good for public health

Editor's note: This post was originally titled: Personalized medicine is primarily a population health intervention. It has been updated with the graph of odds ratios/betas from GWAS studies. There has been a lot of discussion of personalized medicine, individualized health, and precision medicine in the news and in the medical research community and President Obama just

Read more »

Football and statistics, on HBR!

January 30, 2015
By

I was asked to adapt my earlier post for the HBR audience, and the new version is now up on HBR. Here is the link. I'm happy that they picked up this post because most business problems concern reverse causation. A small subset of problems can be solved using A/B testing, but only those in which causes are known in advance and subject to manipulation. Even then, Facebook got into…

Read more »

Cognitive vs. behavioral in psychology, economics, and political science

January 30, 2015
By

I’ve been coming across these issues from several different directions lately, and I wanted to get the basic idea down without killing myself in the writing of it. So consider this a sketchy first draft. The starting point is “behavioral economics,” also known as the “heuristics and biases” subfield of cognitive psychology. It’s associated with […] The post Cognitive vs. behavioral in psychology, economics, and political science appeared first on…

Read more »

Multiple Random Variables Problems

January 30, 2015
By
Multiple Random Variables Problems

To probability lovers, I just want to share (and discuss) few simple problems I solved in Chapter 4 of Casella, G. and Berger, R.L. (2002). Statistical Inference. A random point $(X,Y)$ is distributed uniformly on the square with vertices $(1, 1),(1,-1...

Read more »

What does a Bayes factor feel like?

January 30, 2015
By

A Bayes factor (BF) is a statistical index that quantifies the evidence for a hypothesis, compared to an alternative hypothesis (for introductions to Bayes factors, see here, here or here). Although the BF is a continuous measure of evidence, humans lo...

Read more »


Subscribe

Email:

  Subscribe