R help - Nov 2010 - effect that cluster sampling has on count data (extra-multinomial or extra-binomial variation?)

I'm wondering if R has a package for generating count data subject to
extra-multinomial variation (or extra-binomial variation?)?? In other words, the
effect that cluster sampling has on count data.

For example: Have a multinomial (p,n) distribution with p=(p11,
p12,p21,p22) and n=number of units and want to program for n=1000, p= (.01, .24,
.25, .25)


Thanks!



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