Timeline for What is the problem with $p > n$?
Current License: CC BY-SA 4.0
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| Jan 5, 2019 at 15:47 | comment | added | Frank Harrell | That question is more about psychology and logistics. I find that very often studies are designed by committee and everyone has a favorite variable. Before you realize it the list of variables is too long to be able to (1) reliably measure all of them and (2) analyze them. | |
| Jan 5, 2019 at 13:52 | comment | added | EconBoy | This is really helpful Frank! I get the knowledge of how to deal with the cases where p > n, I get to know why it is a problem and what kind of problem can lead to. I really got a lot of answer for that a lot from you, although you miss my point, I only ask a simple question that why that case might happen if they make a delicate data collection. Statisticians know it can be a problem so why they did not prevent it, obviously they know, that's mean they try but cannot. so why they cannot? Thank you so much !!! | |
| Jan 5, 2019 at 12:46 | history | answered | Frank Harrell | CC BY-SA 4.0 |