Here's what she's still missing. Models about things like salaries and prices have to be careful to disentangle supply and demand. The insinuation when you he

Here's what she's still missing. Models about things like salaries and prices have to be careful to disentangle supply and demand. The insinuation when you hear that space-users earn more than tab-users is that space-users are somehow more productive, sexier or in with the times. When, as other commenters here have noted, large cool corporations tend to contribute to and use open source code, which is more often space-aligned. The money question here is -- can I improve my earnings potential by switching to spaces? And this isn't solved by just noting that spaces correlate to Git and open-source; what I need to know if switching to spaces (or using Git) changes my supply of productivity-adjusted labor; or if it's just what they use in higher-paying jobs. Here's how you disentangle this: you pick a variable that correlates to X (spaces vs tabs) but not to y (salaries). The textbook example is the demand for foodstuffs. Regressing quantity bought versus price tells you very little (supply and demand may be moving simultaneously); instead, you add something like crop productivities as an instrumental variable to filter out the supply effects and see the demand only. https://en.wikipedia.org/wiki/Instrumental_variable https://en.wikipedia.org/wiki/Instrumental_variable