Dear all,

I am trying to run the following regression:

where

Even when I drop one myself, Stata drops another one from the the bins included.

I would be grateful for any suggestion. Thank you.

Sincerely,

Chiara

I am trying to run the following regression:

Code:

svy: tpoisson lnincome lnexp count_00_05 - count_g37, ll(0)

*count_00_05, count_05_010, count_10_13,...count_g37*are variables that count the number of times temperature occurs in a certain bin. When I run this regression, Stata automatically drops a bin (because they are perfectly collinear) but it does so arbitrarily. Is it possible to specify the bin to be dropped (as reference category)?Even when I drop one myself, Stata drops another one from the the bins included.

I would be grateful for any suggestion. Thank you.

Sincerely,

Chiara

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