$500? that's what, a half-day bill rate for most mid range USian computer professionals? If you believe you are deriving much productivity benefit from caffei

$500? that's what, a half-day bill rate for most mid range USian computer professionals? If you believe you are deriving much productivity benefit from caffeine at all, that doesn't seem like a very good deal. I'm just saying, the fact that someone won't give up a drug they perceive to enhance productivity for a small amount of money is not evidence that it is addictive; it could also be a rational decision (e.g. I believe I am giving up more than $500 worth of additional productivity if I don't use caffeine) I would be really interested in the results of (and even willing to participate in) a properly controlled study that measured the effects of caffeine on productivity. But measuring actual productivity is /very hard/ which is why I've gotta keep using words like 'perceived productivity'