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ciphergoth comments on Open Thread, June 16-30, 2013 - Less Wrong Discussion

3 Post author: Dorikka 16 June 2013 04:45AM

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Comment author: TheOtherDave 21 June 2013 02:52:07PM 1 point [-]

Well, to go ahead and state the incredibly obvious: in cases where institution X is not equally well-established globally, one thing to look at is variations in X among different nations, geographic regions, populations, etc. (depending on the kind of thing X is). If Y remains equally stable across the board while X varies, that's evidence that X doesn't have much to do with Y.

Comment author: cousin_it 21 June 2013 03:40:14PM *  3 points [-]

Part of the problem is that changes in X might be aimed at keeping Y stable when some other factor Z varies. See Milton Friedman's Thermostat:

If the driver is doing his job right, and correctly adjusting the gas pedal to the hills, you should find zero correlation between gas pedal and speed, and zero correlation between hills and speed.

For example, it's hard to answer the question "do armies stop invasions?" by using correlations, because the rulers can adjust the strength of the army in response to the risk of getting invaded, so the resulting risk depends mostly on the risk tolerance of the rulers.