Stata 15 note: _crccip removed

[Bjarte Aagnes]

If you have used _crccip in your commands; be aware that the command has been removed from Stata 15:

. which _crccip
command _crccip not found as either built-in or ado-file

in accorance with description given in version 14 _crccip.ado

. type _crccip.ado
*! version 3.0.6  09may2016
*! This file is no longer used and will be removed in a future edition

[Richard Williams]

I have no idea what it does. But I suppose if someone had a desperate need for it, you could copy the Stata 14 or earlier version and put it along a path where Stata could find it.

[Nick Cox]

I was going to give the advice that Richard gives except to add that you do this on your own initiative. As of Stata 14 _crccip isn't even undocumented (see help undocumented for this spectral category) which is an implicit signal about support.

[Rafal Raciborski (StataCorp)]

_crccip has been superseded by invpoisson(); here is an example (ran in Stata 14.2):

. local k 2

. local level 95

. local alpha = (100-`level')/200

.
. _crccip `k' `level'

. ret list

scalars:
              r(lower) =  .2422092785441365
              r(upper) =  7.224687667720477

.
. di cond(`k'==0, 0,invpoisson(`k'-1,1-`alpha'))
.24220928

. di invpoisson(`k',`alpha')
7.2246877

.
. local k 0

.
. _crccip `k' `level'

. ret list

scalars:
              r(lower) =  0
              r(upper) =  3.688879183415171

.
. di cond(`k'==0, 0,invpoisson(`k'-1,1-`alpha'))
0

. di invpoisson(`k',`alpha')
3.6888795