Monthly Archives: May 2012

Cross Sectional Correlation

May 7, 2012
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Cross Sectional Correlation

Diversification is hard to find nowadays because financial markets are becoming increasingly correlated. I found a good visually presentation of Cross Sectional Correlation of stocks in the S&P 500 index in the Trading correlation by D. Varadi and C. Rittenhouse article. Let’s compute and plot the average correlation among stocks in the S&P 500 index

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The hockeystick revisited

May 7, 2012
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The hockeystick revisited

Previous posts: Correlation of temperature proxies with observations The “best” proxies for temperature reconstruction Okay, I couldn’t resist. I wanted to provide some more in depth analysis of temperature proxies, but I just went ahead and did my own little reconstruction of Northern hemisphere annual average temperatures over the past millenium using McShane et al.‘s

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relevant, revised, & resubmitted

May 7, 2012
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relevant, revised, & resubmitted

We have now completed our revision of the paper Relevant statistics for Bayesian model choice, written with Judith Rousseau, Jean-Michel Marin, and Natesh Pillai. It has been resubmitted to Series B and reposted on arXiv. The major change in the paper is the inclusion of a check about the relevance of a given summary statistics,

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useR! 2012 – DEADLINE FAST APPROACHING!

May 7, 2012
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useR! 2012 – DEADLINE FAST APPROACHING!

DEADLINE FAST APPROACHING – 8th Annual International R User Conference useR! 2012, Nashville, Tennessee USA Registration Deadlines: Early Registration: Passed Regular Registration: Mar 1- May 12 Late Registration: May 13 – June 4 On-Site Registration: June 12 – June 15 Please note: Nashville is offering several large entertainment events the month of June, and hotels are quickly selling out....

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Thursday: Tweet-chat on Multiple Sclerosis research

May 7, 2012
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The story about the great work that SUNY Buffalo has been doing to find a cure for Multiple Sclerosis with Revolution R Enterprise and IBM Netezza has generated a lot of attention, with stories in Forbes, InformationWeek and eWeek (amongst others). To continue the discussion, IBM has put together a panel for a "Tweet Chat" on Thursday (May 10)...

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Multiplicative effects in sensory panel data

May 7, 2012
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Multiplicative effects in sensory panel data

In a previous post I used JAGS to build the Bayesian equivalent of a two-way ANOVA. Effects were determined of products, panelists and their interaction. In this post this model will be rebuild to provide a more simplified and advanced model. The inter...

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A sociologist converts from Stata to R

May 7, 2012
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Ph.D candidate in sociology Ethan Fosse just switched from Stata to doing 100% of his analysis with R. His reasons? If you want to do Bayesian analysis or graph modeled coefficients (or work with complex data structures more generally), then R is much easier than Stata due to the object-oriented programming environment. It's unbelievably liberating to be able to...

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Example 9.30: addressing multiple comparisons

May 7, 2012
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Example 9.30: addressing multiple comparisons

We've been more sensitive to accounting for multiple comparisons recently, in part due to work that Nick and colleagues published on the topic. In this entry, we consider results from a randomized trial (Kypri et al., 2009) to reduce problem drinking ...

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Second Milano R net meeting to be held in September 27, 2012

May 7, 2012
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We are organising the second Milano R net meeting in September 27, 2012.

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Bivariate linear mixed models using ASReml-R with multiple cores

May 7, 2012
By
Bivariate linear mixed models using ASReml-R with multiple cores

A while ago I wanted to run a quantitative genetic analysis where the performance of genotypes in each site was considered as a different trait. If you think about it, with 70 sites and thousands of genotypes one is trying … Continue reading →

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