Hello,
I am trying to estimate willingness to pay using the spike command, but I keep receiving the following error:
"could not calculate numerical derivatives
missing values encountered"
For some reason, the model won't converge. I have attached the dataset that I am using, the code is
. spike s t bid, robust
Has anyone encountered this issue? Also this is my first time posting so I apologize if I have left out relevant info/formatted something incorrectly!!
Thank you!
I am trying to estimate willingness to pay using the spike command, but I keep receiving the following error:
"could not calculate numerical derivatives
missing values encountered"
For some reason, the model won't converge. I have attached the dataset that I am using, the code is
. spike s t bid, robust
Has anyone encountered this issue? Also this is my first time posting so I apologize if I have left out relevant info/formatted something incorrectly!!
Thank you!