[R] Negative binomial parameterisation in mgcv

Mark Payne markpayneatwork at gmail.com
Wed Nov 13 10:38:33 CET 2013

Dear R-help,

The negative binomial distribution has several different
parameterisations, but I can't seem to figure out what the exact one
used in mgcv's negbin family is? negbin() requires a theta argument,
but its not clear anywhere in the documentation (that I can find), how
this parameter should be interpreted - for example, can it be less
than 1?

Best wishes,


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