Never back down: The culture of poverty and the culture of journalism

May 18, 2014
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Never back down:  The culture of poverty and the culture of journalism

Ta-Nehisi Coates recently published a fascinating column on the “culture of poverty,” in particular focusing on the idea that behavior that is rational and adaptive in some settings is not so appropriate in others: The set of practices required for a young man to secure his safety on the streets of his troubled neighborhood are […] The post Never back down: The culture of poverty and the culture of journalism…

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European MEP data, part 3

May 18, 2014
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European MEP data, part 3

As final post on European MEPs voting I wanted to look at the individual MEP. The variables examined are how often present and how often present but not voted. The latter might be a marker of sign in and slope off. The analysis chosen is a hierarchical...

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Deconstructing Andrew Gelman: “A Bayesian wants everybody else to be a non-Bayesian.”

May 18, 2014
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Deconstructing Andrew Gelman:  “A Bayesian wants everybody else to be a non-Bayesian.”

At the start of our seminar, I said that “on weekends this spring (in connection with Phil 6334, but not limited to seminar participants) I will post some of my ‘deconstructions‘ of articles”. I began with Andrew Gelman‘s note  “Ethics and the statistical use of prior information”[i], but never posted my deconstruction of it. So since it’s Saturday night, and […]

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Mixed Effects Tutorial 2: Fun with merMod Objects

May 17, 2014
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Fun with merMod Objects Fun with merMod Objects Jared E. Knowles Saturday, May 17, 2014 Introduction First of all, be warned, the terminology surrounding multilevel models is vastly inconsistent. For examp...

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Forum in Ecology on p-values and model selection

May 17, 2014
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There’s a special issue of the journal (vol. 95, no. 3) featuring several papers on p-values. There’s also a discussion that I wrote, which does not appear in the journal (for reasons explained below) but which I extract and link to below. First, the papers in the special section: P values, hypothesis testing, and model […] The post Forum in Ecology on p-values and model selection appeared first on Statistical…

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RGolf

May 16, 2014
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Its time for some fun today - because its Friday as David Smith says :).There are many code golf sites, even some support R. However, most of them are algorithm oriented. A true RGolf competition should involve transforming a source data frame to some ...

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Save 45% on Practical Data Science with R (expires May 21, 2014)

May 16, 2014
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Save 45% on Practical Data Science with R (expires May 21, 2014)

Please share this generous deal from Manning publications: save 45% on Practical Data Science with R through May 21, 2014. Please tweet, forward and share! Edit: we are going to try and keep the current best deals on the book at the bottom of the Practical Data Science with R page. So look there for […] Related posts: A bit of the agenda of Practical Data Science with R Data…

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Free Eprints of Our Paper

May 16, 2014
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Free Eprints of Our Paper

If you're interested in downloading a copy of my recent paper with Xiao Ling, "Bias Reduction for the Maximum Likelihood Estimator of the Parameters of the Generalized Rayleigh Family of Distributions", but don't have a subscription to Communications i...

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How much can we learn about individual-level causal claims from state-level correlations?

May 16, 2014
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How much can we learn about individual-level causal claims from state-level correlations?

Hey, we all know the answer: “correlation does not imply causation”—but of course life is more complicated than that. As philosophers, economists, statisticians, and others have repeatedly noted, most of our information about the world is observational not experimental, yet we manage to draw causal conclusions all the time. Sure, some of these conclusions are […] The post How much can we learn about individual-level causal claims from state-level correlations?…

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R has some sharp corners

May 16, 2014
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R has some sharp corners

R is definitely our first choice go-to analysis system. In our opinion you really shouldn’t use something else until you have an articulated reason (be it a need for larger data scale, different programming language, better data source integration, or something else). The advantages of R are numerous: Single integrated work environment. Powerful unified scripting/programming […] Related posts: R minitip: don’t use data.matrix when you mean model.matrix Survive R Why…

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Perspektive statt Befristung: Für mehr feste Arbeitsplätze im Wissenschaftsbereich

May 16, 2014
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Exzellente Hintergrundinformation gibt es auch im Blog von Markus Dahlem, z.B.: [1], [2], oder [3]. Facebook-Gruppe: https://www.facebook.com/akademischeJuniorposition Folgende Abbildung sagt eigentlich alles: (R.Kreckel, Habilitation vs. Tenure Track,...

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More on the Properties of the "Adjusted" Coefficient of Determination

May 15, 2014
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More on the Properties of the "Adjusted" Coefficient of Determination

A while back I wrote about the fact that R2 (the coefficient of determination for a linear regression model) is a sample statistic, and as such it has a sampling distribution. In that post and in follow-up posts here and here, I discussed some of ...

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Upcoming New York Data Events (Summer, 2014)

May 15, 2014
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I'm going to be in NYC for the summer, so I was interested to know whether there are any events...

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hipsteR: re-educating people who learned R before it was cool

May 15, 2014
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hipsteR: re-educating people who learned R before it was cool

This morning, I started a tutorial for folks whose knowledge of R is (like mine) stuck in 2001. Yesterday I started reading the Rcpp book, and on page 4 there’s an example using the R function replicate, which (a) I’d never heard before, and (b) is super useful. I mean, I often write code like […]

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The Mind Is Flat! So Stop Overfitting Choice Models

May 15, 2014
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The Mind Is Flat! So Stop Overfitting Choice Models

Conjoint analysis and choice modeling rely on repeated observations from the same individuals across many different scenarios where the features have been systematically manipulated in order to estimate the impact of varying each feature. We believe th...

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qqman: an R package for creating Q-Q and manhattan plots from GWAS results

May 15, 2014
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qqman: an R package for creating Q-Q and manhattan plots from GWAS results

Three years ago I wrote a blog post on how to create manhattan plots in R. After hundreds of comments pointing out bugs and other issues, I've finally cleaned up this code and turned it into an R package.The qqman R package is on CRAN: http://cran.r-project.org/web/packages/qqman/The source code is on GitHub: https://github.com/stephenturner/qqmanIf you'd like to cite the qqman package (appreciated but not required), please cite this pre-print: Turner, S.D. qqman: an R package…

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Bill Easterly vs. Jeff Sachs: What percentage of the recipients didn’t use the free malaria bed nets in Zambia?

May 15, 2014
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Bill Easterly vs. Jeff Sachs: What percentage of the recipients didn’t use the free malaria bed nets in Zambia?

I came across this from Jeff Sachs: [Bill Easterly in his 2006 book] went on to write that “a study of a program to hand out free [malaria bed] nets in Zambia to people … found that 70 percent of the recipients didn’t use the nets.” Yet this particular study, which was conducted by the […] The post Bill Easterly vs. Jeff Sachs: What percentage of the recipients didn’t use…

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understanding complex and large industrial data (UCLID 2014)

May 15, 2014
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understanding complex and large industrial data (UCLID 2014)

Just received this announcement of the UCLID 2014 conference in Lancaster, July 1-2 2014: Understanding Complex and Large Industrial Data 2014, or UCLID, is a workshop which aims to provide an opportunity for academic researchers and industrial practitioners to work together and share ideas on the fast developing field of ‘big data’ analysis. This is […]

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The ivlewbel Package. A new way to Tackle Endogenous Regressor Models.

May 15, 2014
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The ivlewbel Package. A new way to Tackle Endogenous Regressor Models.

In April 2012, I wrote this blog post demonstrating an approach proposed in Lewbel (2012) that identifies endogenous regressor coefficients in a linear triangular system. Now I am happy to announce the release of the ivlewbel package, which contains a function through which Lewbel’s method can be applied in R. This package is now available […]

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The ivlewbel Package. A new way to Tackle Endogenous Regressor Models.

May 15, 2014
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The ivlewbel Package. A new way to Tackle Endogenous Regressor Models.

In April 2012, I wrote this blog post demonstrating an approach proposed in Lewbel (2012) that identifies endogenous regressor coefficients in a linear triangular system. Now I am happy to announce the release of the ivlewbel package, which contains a function through which Lewbel’s method can be applied in R. This package is now available […]

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Interpreting Confidence Intervals

May 14, 2014
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Interpreting Confidence Intervals

I enjoyed William M. Briggs' ("Statistician to the Stars") post today: "Frequentists are Closet Bayesians: Confidence Interval Edition". Getting your head around the (correct) interpretation of a confidence interval can be difficult for students. Try t...

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Robust in one sense, sensitive in another

May 14, 2014
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-+*When you sort data and look at which sample falls in a particular position, that’s called order statistics. For example, you might want to know the smallest, largest, or middle value. Order statistics are robust in a sense. The median of a sample, for example, is a very robust measure of central tendency. If Bill […]

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“The subtle funk of just a little poultry offal”

May 14, 2014
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“The subtle funk of just a little poultry offal”

Today’s item mixes two of my favorite themes in a horrible way, sort of like a Reese’s Cup but combining brussels sprouts and liver instead of peanut butter and chocolate. In this case, the disturbing flavors that go together are plagiarism (you know what that is) and the publication filter (the idea that there should […] The post “The subtle funk of just a little poultry offal” appeared first on…

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