Re: ANOVA with patents as DV

Posted by Bruce Weaver on Jun 19, 2013; 11:41am
URL: http://spssx-discussion.165.s1.nabble.com/ANOVA-with-patents-as-DV-tp5720812p5720813.html

For count DVs, it is common to use Poisson regression, or perhaps negative binomial regression if the counts are over-dispersed.  There are also variations on these models that allow for having an overabundance of zeros (search on 'zero-inflated').  These models are run via GENLIN (Analyze > Generalized Linear Models > Generalized Linear Models).  

But depending on your intended audience, those types of models may be difficult to digest.  If it is reasonable and fair (i.e., not misleading) to use means and SDs descriptively, ANOVA will give you a fairly decent model too.  Remember what George Box said about models -- all of them are wrong, but some are useful.

HTH.

maudoostenbrink wrote

Dear all,

This might be a stupid question but I'm quite new to this. I want to run a ANOVA with one categorical independent variable (investment stage; 4 levels: Seed, Early, Expansion and Later) and my DV is number of patents. However, the way I understood using an ANOVA your DV should be either continuous, ordinal or dichotomous. My DV is # of patents, this is discrete, right? Can you still do a anova with a discrete DV like this?

Thank you very much in advance.

Kind regards,

Maud Oostenbrink
Maastricht University

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