Hi Barry,

Thank you for your response. You are right that I didn't specify my
question. I had a more fundamental question; that is whether there are
non-bayesian spatiotemporal R packages that allow me to model count data. I
am interested in all the things you have mentioned, but mainly interested
in whether there has been change in my outcome (accounting for spatial
auto-correlation) and which predictors are associated with that change. I
also came to know that there are spatial panel models. So far I only could
find the ones that deal with rates or continuous outcomes. I hope I
clarified my question. Thank you.

Best,

Tirth


On Sat, Jan 25, 2014 at 4:30 AM, Barry Rowlingson <
b.rowlingson@lancaster.ac.uk> wrote:

> On Sat, Jan 25, 2014 at 3:30 AM, Tirth Bhatta <tirth38@gmail.com> wrote:
> > Hi Everyone,
> >
> > I am currently working on a dataset that requires me to incorporate space
> > and time. Space (area--census tracts) is invariant, so change in my
> > variable is occurring only in terms of time. I have a count variable
> (count
> > of disease cases) followed over time. I know I can change it to rate and
> > use Gaussian models. I was trying to find out, if there are any
> > spatio-temporal models that allow me to use Poisson models. I may be
> wrong,
> > but I could only find Bayesian spatial-temporal models. Am I making a
> > correct assessment? If not, what R-packages would you recommend for me? I
> > saw that R-INLA may also be used, but I am not sure if I can use
> predictors
> > in the model?
>
>  You seem to be putting the cart before the horse. There may be lots
> of spatio-temporal models (and I could probably make up some more
> before lunch) but will they answer the question you want answering?
>
>  We don't know, because you've not told us what the question is! Do
> you want to know if there's spatial variability? Space-time
> clustering? Correlation with a covariate? Are some areas increasing
> faster than others? Etc!
>
>  There's no point trying to find out what statistical models have been
> implemented unless we know what you are trying to find out from your
> data.
>
> Barry
>



-- 
Best,
................................................................................................................................................................................................................
*Tirth Raj Bhatta*
PhD(Sociology, continuing), MGS(Master of Gerontological Studies, Miami
University, 2010), MSc(Statistics, Tribhuvan University, Nepal, 2004)


*Research AssistantDepartment of Sociology*


*Case Western Reserve University10900 Euclid Avenue Cleveland, Ohio 44106*
*****Feel: Love Begins With Me*****

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