[R] family question

Roger Koenker roger at ysidro.econ.uiuc.edu
Thu Aug 31 00:07:22 CEST 2000

I think that this is explained quite definitively in Feller v1.2nd ed III.6.

	...the probability that in families of 10,000 the lead in boys/girls
	never changes is about 0.0085.

url:	http://www.econ.uiuc.edu		Roger Koenker	
email	roger at ysidro.econ.uiuc.edu		Department of Economics
vox: 	217-333-4558				University of Illinois
fax:   	217-244-6678				Champaign, IL 61820

On 30 Aug 2000, Douglas Bates wrote:

> Actually, no.  If you have a large number of families you will see, as
> you describe below, some extremely large families.  I simulated
> another 10000 families with a maximum family size of 20000 and got 55
> that would have execeded the maximum size.  The trick on the
> population proportions is that each one of those families contributes
> 10000 girls whereas the approximately 5000 families of size 1 only
> contribute a total of 5000 boys to the population.  The proportion in
> the population starts to look like the proportion in the extremely ....

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