Boxes or lines: showing the trend in US adoptions

January 21, 2015
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Boxes or lines: showing the trend in US adoptions

Time used a pair of area charts (a form of treemap) to illustrate the trend in Americans adopting babies of foreign origin. The data consist of the number of babies labeled by country of birth in 1999 and in 2013....

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Plans for reboot of Statistical Communication class

January 21, 2015
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Plans for reboot of Statistical Communication class

At the end of my course on Statistical Communication and Graphics last semester, I enlisted some of the students to help plan for the new version of the course (which starts next week). I took a bunch of notes on the blackboard and then a student took pictures for me. I had the idea that […] The post Plans for reboot of Statistical Communication class appeared first on Statistical Modeling,…

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Github cheat sheet

January 21, 2015
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Mike Betancourt pointed us to this page. Maybe it will be useful to you too. The post Github cheat sheet appeared first on Statistical Modeling, Causal Inference, and Social Science.

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A bunch of papers

January 20, 2015
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A bunch of papers

The beginning of the new year has been particularly busy, as I'm working on several interesting projects. On the bright side, some of these are starting to give their fruits and, coincidentally, in the last few days we've had a few papers finalise...

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Microbiome Digest Blog

January 20, 2015
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Microbiome Digest Blog

I have a noteworthy blogs tag on this blog that I sort of forgot about, and haven't used in years. But I started reading one recently that's definitely qualified for the distinction.The Microbiome Digest is written by Elisabeth Bik, a scienti...

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Announcing the caretEnsemble R package

January 20, 2015
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Last week version 1.0 of the caretEnsemble package was released to CRAN. I have co-authored this package with Zach Mayer, who had the original idea of allowing for ensembles of train objects in the caret package. The package is designed to make it easy...

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Another benefit of bloglag

January 20, 2015
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In the classic Philip K. Dick novel, The World Jones Made, the main character has the ability to see the future, in particular he knows what will happen a year in the future, with this window moving forward relative to present time. Sounds cool, huh? But that’s not the character’s perception; instead: It’s not so […] The post Another benefit of bloglag appeared first on Statistical Modeling, Causal Inference, and…

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Gorging ourselves on "free" health care: Harvard’s dilemma

January 20, 2015
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Gorging ourselves on "free" health care: Harvard’s dilemma

Editor's note: This is a guest post by Laura Hatfield. Laura is an Assistant Professor of Health Care Policy at Harvard Medical School, with a specialty in Biostatistics. Her work focuses on understanding trade-offs and relationships among health outcomes. Dr. Hatfield received her BS in genetics from Iowa State University and her PhD in biostatistics from the University

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Three reasons to doubt the GDP-gas price conjecture

January 20, 2015
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Dragged by infectious incuriosity, the financial press ran with the story that falling gasoline prices (50% drop in 6 months) is "the best economic stimulus one can get". See former Deputy Treasury Secretary Robert Altman on CNBC, Business Insider's "cheap gas boost", Wall Street Journal citing the "low oil prices as an effective tax cut for consumers", New York Times quoting a Citigroup analyst claiming a global > $1 trillion…

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Finding matrix elements that satisfy a logical expression

January 20, 2015
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Finding matrix elements that satisfy a logical expression

A common task in SAS/IML programming is finding elements of a SAS/IML matrix that satisfy a logical expression. For example, you might need to know which matrix elements are missing, are negative, or are divisible by 2. In the DATA step, you can use the WHERE clause to subset data. […]

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Communicating Risk and Uncertainty

January 20, 2015
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Communicating Risk and Uncertainty

David Spiegelhalter gave a fascinating talk on Communicating Risk and Uncertainty to the Public & Policymakers at the Grantham Institute of the Imperial College in London last Tuesday.In a very engaging way David gave many examples and anecdotes fr...

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Workshop on science communication for graduate students

January 19, 2015
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Nathan Sanders writes: Applications are now open for the Communicating Science 2015 workshop (http://comscicon.com/apply-comscicon15), to be held in Cambridge, MA on June 18-20th, 2015. Graduate students at US institutions in all fields of science and engineering are encouraged to apply. The application will close on March 1st. Acceptance to the workshop is competitive; attendance of […] The post Workshop on science communication for graduate students appeared first on Statistical Modeling,…

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“Surely our first response to the disproof of a shocking-but-surprising claim should be to be un-shocked and un-surprised, not to try to explain away the refutation”

January 19, 2015
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“Surely our first response to the disproof of a shocking-but-surprising claim should be to be un-shocked and un-surprised, not to try to explain away the refutation”

I came across the above quote the other day in an old post of mine, when searching for a Schrodinger’s cat image. The quote came up in the context of a statistical claim made by a political activist which was widely promoted and discussed but which turned out to be false. As I wrote at […] The post “Surely our first response to the disproof of a shocking-but-surprising claim should…

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On deck this week

January 19, 2015
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Mon: “Surely our first response to the disproof of a shocking-but-surprising claim should be to be un-shocked and un-surprised, not to try to explain away the refutation” Tues: Another benefit of bloglag Wed: High risk, low return Thurs: Patience and research Fri: This is why I’m a political scientist and not a psychologist Sat: “What […] The post On deck this week appeared first on Statistical Modeling, Causal Inference, and…

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Haavelmo and Causal Modeling

January 19, 2015
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Speaking of causal modeling, as we were in a recent post, Econometric Theory is doing a special issue on Haavelmo. (This is not new information, but hey, I'm usually slow to notice things, and perhaps you are too.) Should be a fine issue...

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DIA Joint Adaptive Design and Bayesian Statistics Conference

January 19, 2015
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This is my first real contribution to the ISBA Section on Biostatistics and Pharmaceutical Statistics, in my new role of secretary. Our section has formally endorsed this very interesting conference $-$ the timeline is very short, as the conferenc...

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Power Analysis and Non-Replicability: If bad statistics is prevalent in your field, does it follow you can’t be guilty of scientific fraud?

January 19, 2015
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Power Analysis and Non-Replicability: If bad statistics is prevalent in your field, does it follow you can’t be guilty of scientific fraud?

If questionable research practices (QRPs) are prevalent in your field, then apparently you can’t be guilty of scientific misconduct or fraud (by mere QRP finagling), or so some suggest. Isn’t that an incentive for making QRPs the norm?  The following is a recent blog discussion (by  Ulrich Schimmack) on the Jens Förster scandal: I thank Richard Gill for […]

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Why Is Paper-Writing Software So Awful?

January 19, 2015
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The tools of the trade for academics and others who write research papers are among the worst software has to offer. Whether it’s writing or citation management, there are countless issues and annoyances. How is it possible that this fairly straightforward category of software is so outdated and awful? Microsoft Word The impetus for this … Continue reading Why Is Paper-Writing Software So Awful?

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Lee Sechrest

January 18, 2015
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Lee Sechrest

Yesterday we posted on Lewis Richardson, a scientist who did pioneering work in weather prediction and, separately, in fractals, in the early twentieth century. I was pointed to Richardson by Lee Sechrest, who I then googled. Here’s Sechrest’s story: His first major book [was] “Psychotherapy and the Psychology of Behavior Change” . . . Sechrest […] The post Lee Sechrest appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Multiple Comparisons with BayesFactor, Part 2 – order restrictions

January 18, 2015
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Multiple Comparisons with BayesFactor, Part 2 – order restrictions

In my previous post, I described how to do multiple comparisons using the BayesFactor package. Part 1 concentrated on testing equality constraints among effects: for instance, that the the effects of two factor levels are equal, while leaving the third free to be different. In this second part, I will describe how to test order restrictions on factor level effects. This post will be a little more involved than the…

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SAS PROC MCMC example in R: Logistic Regression Random-Effects Model

January 18, 2015
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In this post I will run SAS example Logistic Regression Random-Effects Model in four R based solutions; Jags, STAN, MCMCpack and LaplacesDemon. To quote the SAS manual: 'The data are taken from Crowder (1978). The Seeds data set is a 2 x 2 fa...

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Multiple Comparisons with BayesFactor, Part 1

January 17, 2015
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Multiple Comparisons with BayesFactor, Part 1

One of the most frequently-asked questions about the BayesFactor package is how to do multiple comparisons; that is, given that some effect exists across factor levels or means, how can we test whether two specific effects are unequal. In the next two posts, I'll explain how this can be done in two cases: in Part 1, I'll cover tests for equality, and in Part 2 I'll cover tests for specific…

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R bracket is a bit irregular

January 17, 2015
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R bracket is a bit irregular

While skimming Professor Hadley Wickham’s Advanced R I got to thinking about nature of the square-bracket or extract operator in R. It turns out “[,]” is a bit more irregular than I remembered. The subsetting section of Advanced R has a very good discussion on the subsetting and selection operators found in R. In particular … Continue reading R bracket is a bit irregular → Related posts: R annoyances Selection…

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