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Re: st: Fwd: false positives

From   "Moises Rosas (w)" <[email protected]>
To   [email protected]
Subject   Re: st: Fwd: false positives
Date   Sun, 20 Sep 2009 10:51:06 -0700 (PDT)

The best I have ever seen :)

From: Kit Baum <[email protected]>
To: [email protected]
Sent: Sunday, September 20, 2009 7:23:47 AM
Subject: st: Fwd: false positives

Begin forwarded message:

> From: Arthur Lewbel <[email protected]>
> Date: September 19, 2009 9:57:57 AM EDT
> To: [email protected]
> Subject: false positives
> Faculty,
> I just came across a wonderful illustration of the problem that if you estimate too many parameters, some will be significant just by random chance. This is the link to a poster that was presented at the 15th annual conference of the organization of human brain mapping:
> In this study, the authors put a Salmon in an MRI machine. They showed the fish pictures of human faces, and recorded the responses in thousands of tiny areas within its brain. A small number of statistically significance responses (p value less than .001) were found. What's most amazing is that the fish was dead at the time.
> Arthur
> =================================================+
> Arthur Lewbel  [email protected]
> phone: (617)-552-3678  fax: (617)-552-2308
> Dept. of Economics, Boston College, Chestnut Hill, MA 02467, USA
> ==================================================

Kit Baum  |  Boston College Economics & DIW Berlin  |
                              An Introduction to Stata Programming  |
  An Introduction to Modern Econometrics Using Stata  |

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