There's been a bit of discussion about TDCS here on LessWrong.  If you don't know what TDCS is here's an article from Technology Review.

Here's a company (soon) selling a DIY kit to build your own.

tDCS is one of the coolest pieces of health/ self improvement technology available today. The US Army and DARPA both currently use tDCS devices to train snipers and drone pilots, and have recorded 2.5x increases in learning rates. This incredible phenomenon is achieved through a very simple device called a tDCS machine.

Today if you want to buy a tDCS machine it's nearly impossible to find one for less than $600, and you are typically required to have a prescription to order one. We wanted a simpler cheaper option. So we made one. Then, because we're all egalitarian like, we thought others might want one too.

The GoFlow β1 is a full kit of all the parts and plans you need to build your own tDCS device. $99 will get you one of the first β1's and will help us develop β2!

Here's a video from Journal of Visualized Experiments on how to administer TDCS.

Thoughts?

I have neither the qualifications nor the access to properly understand these two paywalled critiques of the RAND Health Insurance Experiment.

Health Plan Switching and Attrition Bias in the RAND Health Insurance Experiment

The Rand Health Insurance Study: A Summary Critique

Has there been any talk about either of these on OB/LW?  If not, why not and could anyone with access to the papers make any comments about how much weight they carry?

I post this here because the RAND results are brought up so often in discussions here, I hope others find it to be an appropriate venue.