de Rugy is also to be commended for having released portions of her dataset** on the Mercauts Center website...Silver is one smart SOB, but goddamn does he need to invest in a copyeditor. Or even a simple spellcheck, which I'm pretty sure every major word processor, web browser, and blogging platform has baked in by now. FiveThirtyEight's analysis is top-notch, but seeing multiple typos in every single post is getting very distracting, especially when there's no excuse for it.
There are two other variations that I find less impluasible...
I find it less impausible that the funds could have been directed toward...
...even after controlling for other demographic variabes...
...they are no proof of casuation at *any* order of magnitude...
de Rugy is correct that many demographic variables are correlated with one another, which makes model speification more difficut and can lead to potential problems with overfitting. However, these demographic variables are also correlated with the poltical representation in the Congress. Moreover, because the stimulus consists of many different 'layers' (categories of projects), it is quite plausible that many different demographic variables (as well as intercations between two or more such variabes) could come to bear on how funds were ultimately distributed.
This is a sticky (albeit common) problem. The best way to handle it would probably be to make several different specificiations of the model and to publish them explicitly.
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posted by mccarty.tim at 7:43 PM on April 3, 2010