One-level data set names in SAS are not always stored in WORK

February 29, 2016
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One-level data set names in SAS are not always stored in WORK

One of the first things SAS programmers learn is that SAS data sets can be specified in two ways. You can use a two-level name such as "sashelp.class" which uses a SAS libref (SASHELP) and a member name (CLASS) to specify the location of the data set. Alternatively, you can […] The post One-level data set names in SAS are not always stored in WORK appeared first on The DO…

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Data Science for Managers: April 2016

February 28, 2016
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Data Science for Managers: April 2016

We are running our short course on “Data Science for Managers” again: 11-13 April 2016. All the details are on the website.

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Dynamique de la Pyramide des Ages

February 28, 2016
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Dynamique de la Pyramide des Ages

Très joli billet sur blog.revolutionanalytics.com avec un code de @kyle_e_walker permettant, très simplement (moyennant une inscription pour avoir une clé permettant d’utiliser l’API du census) de construire une pyramide des âges dynamiques. > devtools::install_github('walkerke/idbr') > library(idbr) > library(ggplot2) > library(animation) > library(dplyr) > library(ggthemes) > idb_api_key("mykey1239F2f324zf9GGZgege32R2ii4") On importe alors les données pour les hommes et les femmes, > male <- idb1('FR', 2010:2050, sex = 'male') %>% + mutate(POP = POP * -1, +…

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Can you trust international surveys?

February 28, 2016
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On the sister blog I report on a new paper, “Don’t Get Duped: Fraud through Duplication in Public Opinion Surveys,” by Noble Kuriakose, a researcher at SurveyMonkey, and Michael Robbins, a researcher at Princeton and the University of Michigan, who gathered data from “1,008 national surveys with more than 1.2 million observations, collected over a […] The post Can you trust international surveys? appeared first on Statistical Modeling, Causal Inference,…

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He wants to teach himself some statistics

February 28, 2016
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Milan Griffes writes: I work at GiveWell, which you’ve kindly written about in the past. I wanted to ask for your current thoughts on the best way to learn statistics outside of formal education since it’s been a few years since your last post on this topic. Do you have any advice for someone with […] The post He wants to teach himself some statistics appeared first on Statistical Modeling,…

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Mortality by Weekday and Age

February 28, 2016
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Mortality by Weekday and Age

A few days ago, I did mention on Twitter a nice graph, with Mortality by Weekday and Age https://t.co/LyzQ7nJABZ very interesting difference, young vs. old pic.twitter.com/EfrX0C1GBS — Arthur Charpentier (@freakonometrics) 27 février 2016 My colleague Jean-Philippe was extremely sceptical, so I tried to reproduce that graph. The good thing is that we have the Social Security Death Master File, for data in the US. To be more specific, I have…

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Graphical Data Analysis with R

February 27, 2016
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Graphical Data Analysis with R: that’s the title of Antony Unwin’s new book. Here are the chapter titles: Ch01 Setting the Scene Ch03 Examining continuous variables Ch04 Displaying Categorial Data Ch05 Looking for Structure Ch06 Investigating Multivariate Continuous Data Ch07 Studying Multivariate Categorical Data Ch08 Getting an Overview Ch09 Graphics and Data Quality Ch10 Comparisons […] The post Graphical Data Analysis with R appeared first on Statistical Modeling, Causal Inference,…

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3 YEARS AGO (FEBRUARY 2013): MEMORY LANE

February 27, 2016
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3 YEARS AGO (FEBRUARY 2013): MEMORY LANE

MONTHLY MEMORY LANE: 3 years ago: February 2013. I mark in red three posts that seem most apt for general background on key issues in this blog [1]. Posts that are part of a “unit” or a group of “U-Phils”(you [readers] philosophize) count as one. Feb. 2013 reminds me how much the issue of the Likelihood Principle figured […]

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Humbling News for Macro-Finance Forecasters

February 26, 2016
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Humbling News for Macro-Finance Forecasters

The two graphs below, one from Deutsche Bank for the U.S. 10-year bond yield and one from the IMF for global real GDP growth, speak for themselves. Forecasting through large structural change is always difficult; maybe the means to which the forec...

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Job opening . . . for a data graphics editor!

February 26, 2016
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Job opening . . . for a data graphics editor!

Larry Wheeler writes: I’m the managing editor at Health Affairs, a monthly peer-reviewed journal about health policy. We publish a lot of statistical graphics submitted with manuscripts from academic, industry, and government researchers. We have a job opening for a new position we’re calling “data graphics editor.” I’ve been having trouble attracting the right kind […] The post Job opening . . . for a data graphics editor! appeared first…

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Job opening . . . for a data graphics editor!

February 26, 2016
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Job opening . . . for a data graphics editor!

Larry Wheeler writes: I’m the managing editor at Health Affairs, a monthly peer-reviewed journal about health policy. We publish a lot of statistical graphics submitted with manuscripts from academic, industry, and government researchers. We have a job opening for a new position we’re calling “data graphics editor.” I’ve been having trouble attracting the right kind […] The post Job opening . . . for a data graphics editor! appeared first…

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A quick lesson in handling more than one messages on one chart

February 26, 2016
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A quick lesson in handling more than one messages on one chart

Between teaching two classes, and a seminar, and logging two coast-to-coast flights, I was able to find time to rethink the following chart from the Wall Street Journal: (link to article) I like the right side of this chart, which...

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Clinton Many More Rich Supporters Than All Other Candidates Combined

February 26, 2016
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Clinton Many More Rich Supporters Than All Other Candidates Combined

With over 26,600 supporters giving at or above the federal individual contribution maximum of $2,700, Hillary Clinton far exceeds the number of contributions by wealthy donors than any other candidate (Table 1: Huge). No only that but the number of huge contributions for Hillary Clinton exceeded the number by her chief rival Bernie Sanders by a factor of 60 to 1.Table 1: This table shows the number of campaign contributions…

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Denying the Service of a Differentially Private Database

February 26, 2016
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Attention conservation notice: A half-clever dig at one of the more serious and constructive attempts to do something about an important problem that won't go away on its own. It doesn't even explain the idea it tries to undermine. Jerzy's "cursor...

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"Analyzing large-scale data: Taxi Tipping behavior in NYC" (This Week at the Statistics Seminar)

February 26, 2016
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Attention conservation notice: Only of interest if you (1) care about large-scale data analysis and/or taxis, and (2) will be in Pittsburgh on Thursday Friday. The last but by no means least talk seminar talk this week: Taylor Arnold, "Analyzing la...

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Preprints are great, but post publication peer review isn’t ready for prime time

February 26, 2016
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The current publication system works something like this: Coupled review and publication You write a paper You submit it to a journal It is peer reviewed privately The paper is accepted or rejected a. If rejected go back to step 2 and start...

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twilight zone [of statistics]

February 25, 2016
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twilight zone [of statistics]

“I have decided that mixtures, like tequila, are inherently evil and should be avoided at all costs.” L. Wasserman Larry Wasserman once remarked that finite mixtures were like the twilight zone of statistics, thanks to the numerous idiosyncrasies associated with such models. And George Casella had similar strong reservations about mixture estimation. Avi Feller and […]

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Overwhelming Growth In National Support for Bernie Sanders Mapped

February 25, 2016
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Overwhelming Growth In National Support for Bernie Sanders Mapped

The FEC just released the most recent campaign contributor data and the results show a strong continued widespread growth in support for Bernie Sanders across the country.Figure 1: A map of what counties and states support Bernie Sanders relative to th...

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Probability paradox may be killing thousands

February 25, 2016
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Brian Kinghorn points to this news article by Christian Grothoff and J. M. Porup, “The NSA’s SKYNET program may be killing thousands of innocent people; ‘Ridiculously optimistic’ machine learning algorithm is ‘completely bullshit,’ says expert.” The article begins: In 2014, the former director of both the CIA and NSA proclaimed that “we kill people based […] The post Probability paradox may be killing thousands appeared first on Statistical Modeling, Causal…

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Fundamental difficulty of inference for a ratio when the denominator could be positive or negative

February 25, 2016
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Fundamental difficulty of inference for a ratio when the denominator could be positive or negative

I happened to come across this post from 2011, which in turn is based on thoughts of mine from about 1993. It’s important and most of you probably haven’t seen it, so here it is again: Ratio estimates are common in statistics. In survey sampling, the ratio estimate is when you use y/x to estimate […] The post Fundamental difficulty of inference for a ratio when the denominator could be…

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Omitting outliers

February 24, 2016
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Omitting outliers

Someone sent me this email today: One of my colleagues said that you once said/wrote that you had encountered very few real outliers in your work, and that normally the “outlier-looking” data points were proper data points that should not ...

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Making data analysis easier: Hadley Wickham at WOMBAT2016

February 24, 2016
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Making data analysis easier: Hadley Wickham at WOMBAT2016

Slides for Hadley’s talk The slides for all the other talks from the workshop are also now online at wombat2016.org

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Nonprofit Stan!

February 24, 2016
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Nonprofit Stan!

Stan is now linked to NumFocus, a 501(c)(3) nonprofit organization that serves several other open-source software projects, including NumPy, Julia, Jupyter, and others: Stan can now accept tax-deductible contributions through this foundation. If you’re interested in donating to Stan, you can contact us directly or just go through the donation page. Stan is a worthy […] The post Nonprofit Stan! appeared first on Statistical Modeling, Causal Inference, and Social Science.

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