R help - Nov 2012 - Ben Bolker's '‘emdbook’ Package , rbetabinom

Hello, 
I am using rbetabinom ( to generate beta binomial random variables) function
available in the "emdbook"package written by Professor. Ben Bolker for
my
research study.
I have no questions with this function. However, I am looking for the
theoretical method/algorithm  of the function "rbetabinom " . 
Morris (1997), American Naturalist 150:299-327 is given as the reference in
the package, But I couldn't fund any theoretical methods to generate beta
binomial random variables in this article.

I would like to kind request you to suggest me any journal paper or document
to study the methods of generating  beta binomial random variables used to
write the function "rbetabinom".

Thank you very much. 

Sincerely,
Arun.





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arun4 <arun.ganesh2012 <at> gmail.com> writes:
> I am using rbetabinom ( to generate beta binomial random variables)
function
> available in the "emdbook"package written by Professor. Ben
Bolker for my
> research study.
> I have no questions with this function. However, I am looking for the
> theoretical method/algorithm  of the function "rbetabinom " . 
> Morris (1997), American Naturalist 150:299-327 is given as the reference in
> the package, But I couldn't fund any theoretical methods to generate
beta
> binomial random variables in this article.
> 
> I would like to kind request you to suggest me any journal paper or
document
> to study the methods of generating  beta binomial random variables used to
> write the function "rbetabinom".
  I answered this off-list (suggesting that the OP look at the
source code of the function, which is very simple).

  The book gives other references to the beta-binomial, including
Crowder (1978), Reeve and Murdoch (1985), and Hatfield (1996), although
the latter two are ecological rather than statistical examples
and I doubt any of them discusses random deviate generation.

I understood that from the source code. Currently I am referring the
suggested articles. 
Thank you very much for the off-list answer and this reply. 




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