Re: [R] Time Series Count Models

2005-07-18 Thread Brett Gordon
Thanks for the suggestion. Is such a model appropriate for count data? The library you reference seems to just be form standard regressions (ie those with continuous dependent variables). Thanks, Brett On 7/16/05, Spencer Graves [EMAIL PROTECTED] wrote: Have you considered lme in

Re: [R] Time Series Count Models

2005-07-18 Thread Paul Johnson
Dear Brett: There are books for this topic that are more narrowly tailored to your question. Lindsey's Models for Repeated Measurements and Diggle, et al's Analysis of Longitudinal Data. Lindsey offers an R package on his web site. If you dig around, you will find many modeling papers on

Re: [R] Time Series Count Models

2005-07-18 Thread Spencer Graves
We are leveraging too far on speculation, at least from what I can see. PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html;. In particular, try the simplest example you can find that illustrates your question, and explain your concerns to us in terms of a

Re: [R] Time Series Count Models

2005-07-18 Thread Brett Gordon
Paul, Thank you so much for your thoughtful reply. I agree - there are many possible descriptions for my data, and I realize that I don't want to get bogged down with figuring out the 'best' model if something simple will work well. For me, I think the difficulty is going to be handling the

[R] Time Series Count Models

2005-07-16 Thread Brett Gordon
Hello, I'm trying to model the entry of certain firms into a larger number of distinct markets over time. I have a short time series, but a large cross section (small T, big N). I have both time varying and non-time varying variables. Additionally, since I'm modeling entry of firms, it seems

[R] Time Series Count Models

2005-07-16 Thread Brett Gordon
Hello, I'm trying to model the entry of certain firms into a larger number of distinct markets over time. I have a short time series, but a large cross section (small T, big N). I have both time varying and non-time varying variables. Additionally, since I'm modeling entry of firms, it seems