[Rsiena-help] questions about Rsiena effects

[Shu He]

Dear Professor,

I have a question with the covariate-similarity effect. In the RSiena
Manual, I think that the original RSiena program uses the difference
between two actors to measure the dissimilarity. However, in my dataset, I
want to measure the location distance between two actors. Since my location
data includes longitude and latitude data for each point, I think that I
cannot directly use the effect function in the RSiena. I opened the
CovariateSimilarityEffect.cpp, it seems that there is a function as
similarity( , ). I don't quite understand where the function is from. Could
you help me with it? Thank you very much!

Best,
Shu

-- 
Shu He
Ph.D. Student
Department of Economics
University of Texas at Austin
1-512-983-7578
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