st: RE: count data and test for zero inflated poisson distribution

["Nick Cox" <n.j.cox@durham.ac.uk>]

Stata offers many commands for these distributions
and others in the same territory. 

Please use -help-, -search- and the manual before
sending such queries to the list. 

Nick 
n.j.cox@durham.ac.uk 

Rajesh Tharyan
 
> I have a dataset which looks like the one below
> 
>            Individual 1      		individual 2
> Time  	count             	 count
> 1		0                   	  1
> 2		1				  0
> 3		0				  0	
> 4		0				  0
> 5		3				  1
> 6		0                         0
> 7		1                         0
> 
> Time represents months and count represents the occurance of 
> an event. I
> understand that count might follow a  zero inflated poisson 
> distribution or
> a negative binomial  distribution. 
> 
> Are there any stata command to check if the data fits these 
> distributions?
> (just like we have the shapiro-wilk test for normality.).
> 
> My objective is to see if there is any increase in the counts 
> between say
> period1 (time 1 to 3) and period2 (time 4 to7) for each 
> individual. And for
> all individuals taken together...

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