st: broken stick (piecewise linear) regression

[keith Farnsworth <k.farnsworth@qub.ac.uk>]

Dear all,
I intend to fit a broken stick model following Bacon and Watts  
"Estimating the transition between two intersecting straight lines",  
Biometrika 1971. I have seen code for this to use the S or R package's  
nls, which I suspect uses maximum likelihood (but not sure) [see  
http://www.biostat.wustl.edu/archives/html/s-news/2000-04/ 
msg00215.html].

I am not an S user, I am a Stata enthusiast!
However, I found no reference to this kind of model in Stata searches.  
I hope someone with more experience than me can explain how Stata will  
implement the Bacon and Watts model.
Thanks,

Keith.

Dr Keith Farnsworth
Lecturer in Mathematical and Behavioural Ecology
Queens University Belfast

Medical Biology Centre
97 Lisburn Road
Belfast BT9 7BL
Northern Ireland
phone +44 (0)2890 272352
fax       +44 (0)2890 236505

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/