Timeline for Correlation between the dependent variable and the instrument
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 11, 2018 at 20:48 | vote | accept | Snoopy | ||
| Aug 11, 2018 at 14:05 | comment | added | Snoopy | Meanwhile, perhaps we should add that cov(z, y | x) = 0 also implies that z does not affect y through u. | |
| Aug 11, 2018 at 13:23 | comment | added | Snoopy | Thanks for this very good answer. So $cov(y,z|x) = 0$ means that z does not affect y conditional on x. This then implies that $cov(y,z) \neq 0$ because z can affect x and x can affect y. | |
| Aug 11, 2018 at 12:40 | review | First posts | |||
| Aug 11, 2018 at 12:51 | |||||
| Aug 11, 2018 at 12:35 | history | answered | Emily Riederer | CC BY-SA 4.0 |