Predictive analytics might not have predicted the Aurora shooter

July 28, 2012
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Predictive analytics might not have predicted the Aurora shooter: It always seems a bit strange to me to suggest that to identify a very small signal in a sea of noise, what we need to do is add more noise. Even if someone is one hundred times more li...

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Statistical Principles?

July 28, 2012
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Statistical Principles?

Statistical Principles? Larry Wasserman There are some so-called principles of statistical inference that have names like, the Sufficiency Principle (SP), the Conditionality Principle (CP) and the Likelihood Principle (LP). Birnbaum (1962) proved that CP and SP imply LP. (But see Mayo 2010). Later, Evans Fraser and Monette (1986) proved that CP alone implies LP (so [...]

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When Picking a C.E.O. Is More Random Than Wise

July 28, 2012
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When Picking a C.E.O. Is More Random Than Wise: It appears there’s at least one area where big data has yet to make an impact. There is little solid research on what makes an effective chief executive, which makes choosing a candidate the product of...

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LOL without the CATS

July 28, 2012
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Mayo points me to this discussion [link fixed] on parsimony by philosopher Elliott Sober. I don’t really understand what he’s talking about but I am posting the link here because it might interest some of you. P.S. More discussion on this...

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R is reported as being used by about half of all data miners in the 2011 Data Miners Survey

July 28, 2012
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R is reported as being used by about half of all data miners in the 2011 Data Miners Survey

by Yanchang Zhao, RDataMining.com R is reported as now being used by close to half of all data miners (47%) in the 2011 Data Miners Survey by Rexer Analytics. Below is picked up from the survey highlights regarding data mining … Continue reading →

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Vizify’s New Infographical Bio

July 27, 2012
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Vizify’s New Infographical Bio

Vizify [vizify.com] has abandoned the infographic resume in favor of a more robust and broadly applicable interactive infographic bio. The service allows you to connect your social media accounts which it mines for your life's details and milestones s...

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Congress to Examine Data Sellers

July 27, 2012
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Congress to Examine Data Sellers: Data brokers, companies that collect consumer information and sell it, are being asked to give details about how they work, and that could lead to more regulation.

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“Get off my lawn”-blogging

July 27, 2012
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Jay Livingston critiques the recent pronouncements of sociologist and cigarette shill Peter Berger, who recently has moved into cultural criticism of New York’s mayor for living with “a woman to whom he is not married” (this is apparently a European sort of thing, I guess they don’t have unmarried partners in the parts of the [...]

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Overfitting

July 27, 2012
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Ilya Esteban writes: In traditional machine learning and statistical learning techniques, you spend a lot of time selecting your input features, fiddling with model parameter values, etc., all of which leads to the problem of overfitting the data and producing overly optimistic estimates for how good the model really is. You can use techniques such [...]

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How important is abstract thinking for graduate students in statistics?

July 27, 2012
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A recent lunchtime discussion here at Hopkins brought up the somewhat-controversial topic of abstract thinking in our graduate program. We, like a lot of other biostatistics/statistics programs, require our students to take measure theoretic probabilit...

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How averages get usurped by policymakers

July 27, 2012
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This WSJ reporter doesn't much like statisticians, growth charts, and CDC (link). Her headline is "Is Baby Too Small? Growth Charts Make It Hard to Tell." This is her lede: Elias Thorsteinsson weighed 6 pounds, 11 ounces, when he was born in January 2010. That put him in the 25th percentile of U.S. babies, meaning 25% of babies were smaller than he was at birth. But he didn't gain weight…

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Methodologists’ Audience

July 27, 2012
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I muse about the role of political methodologists within political science and use two successful papers to illustrate properties of useful methods papers. I encourage you to share this with others and contribute to the conversation at Methodologists' Audience, which first appeared at carlislerainey.com.For more of my thoughts and ideas, subscribe to my blog (via RSS or Email) and follow me on Twitter. You also might like to browse my…

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Visualising the Emotional Response to LONDON 2012

July 27, 2012
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Visualising the Emotional Response to LONDON 2012

The Emoto visualization [emoto2012.org] by the illustrious Moritz Stefaner, FutureEverything, and Studio NAND tracks twitter for themes related to the Games, analyzes the messages for content and emotional expressions, and visualizes topics and tone o...

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Evolution average number of beds per hospital

July 27, 2012
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Evolution average number of beds per hospital

The OECD collects (among a lot of other statistics) information on the number of hospitals and hospital beds per country. These two parameters combined and its evolution over the years could give an indication on whether or not the country’s hospital landscape is evolving towards large medical centers, small scale  Read more »The post Evolution average number of beds per hospital appeared first on FishyOperations.

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P-values as Frequentist Measures

July 27, 2012
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P-values as Frequentist Measures

Working on the last two chapters of my book on philosophy of statistical inference, I’m revisiting such topics as weak conditioning, Birnbaum, likelihood principle, etc., and was reading from the Proceedings of the Berkeley Conference in Honor of Jerzy Neyman and Jack Kiefer (1985)[i]. In a paper I had not seen (or had forgotten), Jim [...]

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More on Factor Attribution to improve performance of the 1-Month Reversal Strategy

July 27, 2012
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More on Factor Attribution to improve performance of the 1-Month Reversal Strategy

In my last post, Factor Attribution to improve performance of the 1-Month Reversal Strategy, I discussed how Factor Attribution can be used to boost performance of the 1-Month Reversal Strategy. Today I want to dig a little dipper and examine this strategy for each sector and also run a sector-neutral back-test. The initial steps to [...]

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Changing function scope in GNU R example

July 26, 2012
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In my last post I have discussed how to work around GNU R scoping rules using environment function. This time let us look at a practical example using recode function from car package.First let us look at how&nbs...

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Acknowledgments

July 26, 2012
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Acknowledgments

Some people have been admiring the new math typesetting; that's MathJax, which I was introduced to by Brendan O'Connor. Some people have been crediting me with coming up with attention conservation notices. I got them from Bruce Sterling's old V...

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Smartphones, Big Data Help Fix Boston’s Potholes

July 26, 2012
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Smartphones, Big Data Help Fix Boston's Potholes : Street Bump uses the phone’s accelerometer to detect bumps in the road. When a car hits a pothole, the app sends information about the bump, including its location, to a database.

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Some thoughts on survey weighting

July 26, 2012
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From a comment I made in an email exchange: My work on survey adjustments has very much been inspired by the ideas of Rod Little. Much of my efforts have gone toward the goal of integrating hierarchical modeling (which is so helpful for small-area estimation) with post stratification (which adjusts for known differences between sample [...]

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Online education: many academics are missing the point

July 26, 2012
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Many academics are complaining about online education and warning us about how it can lead to a lower quality product. For example, the New York Times recently published this op-ed piece wondering if “online education [will] ever be education of...

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Our broken scholarly publishing system

July 26, 2012
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I get about 10 requests to referee journal articles each week. At this point, even the saying No part is getting tiring. I think I’d much prefer Kriegeskorte’s system of post-publication review where whatever you write about a paper is open and available to all to read, and where you can devote your review efforts [...]

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Our broken scholarly publishing system

July 26, 2012
By

I get about 10 requests to referee journal articles each week. At this point, even the saying No part is getting tiring. I think I’d much prefer Kriegeskorte’s system of post-publication review where whatever you write about a paper is open and available to all to read, and where you can devote your review efforts [...]

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