Posts Tagged ‘ Causal Inference ’

Six quick tips to improve your regression modeling

January 29, 2015
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It’s Appendix A of ARM: A.1. Fit many models Think of a series of models, starting with the too-simple and continuing through to the hopelessly messy. Generally it’s a good idea to start simple. Or start complex if you’d like, but prepare to quickly drop things out and move to the simpler model to help […] The post Six quick tips to improve your regression modeling appeared first on Statistical…

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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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“Epidemiology and Biostatistics: competitive or complementary?”

January 11, 2015
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Mohammad Mansournia writes: I have a 20 minute lecture on “Epidemiology and Biostatistics: competitive or complementary?” at Tehran University of Medical Sciences in the next month. I should mention the difference between an epidemiologist and a biostatistician and their competitive or complementary roles in public health. I am wondering if you have any thoughts on […] The post “Epidemiology and Biostatistics: competitive or complementary?” appeared first on Statistical Modeling, Causal…

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Designing a study to see if “the 10x programmer” is a real thing

December 4, 2014
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Lorin H. writes: One big question in the world of software engineering is: how much variation is there in productivity across programmers? (If you google for “10x programmer” you’ll see lots of hits). Let’s say I wanted to explore this research question with a simple study. Choose a set of participants at random from a […] The post Designing a study to see if “the 10x programmer” is a real…

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If observational studies are outlawed, then only outlaws will do observational studies

December 3, 2014
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If observational studies are outlawed, then only outlaws will do observational studies

My article “Experimental reasoning in social science” begins as follows: As a statistician, I was trained to think of randomized experimentation as representing the gold standard of knowledge in the social sciences, and, despite having seen occasional arguments to the contrary, I still hold that view, expressed pithily by Box, Hunter, and Hunter (1978) that […] The post If observational studies are outlawed, then only outlaws will do observational studies…

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Retrospective clinical trials?

November 20, 2014
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Kelvin Leshabari writes: I am a young medical doctor in Africa who wondered if it is possible to have a retrospective designed randomised clinical trial and yet be sound valid in statistical sense. This is because to the best of my knowledge, the assumptions underlying RCT methodology include that data is obtained in a prospective […] The post Retrospective clinical trials? appeared first on Statistical Modeling, Causal Inference, and Social…

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Best job ever

November 14, 2014
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Best job ever

The job advert for the postdoc position in our MRC-funded project on the Regression Discontinuity Design is finally out.Aidan has done a fantastic job in his little over a year in the position, but he's now moved to a lectureship in our department...

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The history of MRP highlights some differences between political science and epidemiology

November 11, 2014
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Responding to a comment from Thomas Lumley (who asked why MRP estimates often seem to appear without any standard errors), I wrote: In political science, MRP always seems accompanied by uncertainty estimates. However, when lots of things are being displayed at once, it’s not always easy to show uncertainty, and in many cases I simply […] The post The history of MRP highlights some differences between political science and epidemiology…

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I love it when I can respond to a question with a single link

October 29, 2014
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Shira writes: This came up from trying to help a colleague of mine at Human Rights Watch. He has several completely observed variables X, and a variable with 29% missing, Y. He wants a histogram (and other descriptive statistics) of a “filled in” Y. He can regress Y on X, and impute missing Y’s from […] The post I love it when I can respond to a question with a…

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Why I’m still not persuaded by the claim that subliminal smiley-faces can have big effects on political attitudes

September 23, 2014
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Why I’m still not persuaded by the claim that subliminal smiley-faces can have big effects on political attitudes

We had a discussion last month on the sister blog regarding the effects of subliminal messages on political attitudes.  It started with a Larry Bartels post entitled “Here’s how a cartoon smiley face punched a big hole in democratic theory,” with the subtitle, “Fleeting exposure to ‘irrelevant stimuli’ powerfully shapes our assessments of policy arguments,” discussing the […]

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