[Rsiena-help] Interpretation of the outdegree activity effect

[Daniel Stefan Hain]

Hello dear group,

I have a question regarding the outdegree activity effect in directed networks. The manual describes it as:

The out-degree activity effect (with or without 'sqrt') reflects tendencies to actors with high out-degrees to send out extra outgoing ties 'because' of their high current out-degrees. This also leads to dispersion in out-degrees of the actors.

But, as I see in the formula, it is just the squared amount of an ego's outdegrees. Wouldn't that rather test for an "inverse U-shape" effect of outdegrees, in a way that their marginal effect follows a curvelinear function, where they first matter less, then more, then less again?

In the same manner, how could the squareroot version of this effect, which is basically the squareroot of an egos outdegrees?

Thank you very much in advance helping me solving my confusion.

Best wishes

Daniel S. Hain

Research Assistant, M.Sc. Economics, M.Sc. International Business, Dipl.-Wirt.-Ing.
Department of Business and Management | IKE | DRUID | EIS
T: (+45) 9940 2724  | Email: dsh at business.aau.dk<mailto:dsh at business.aau.dk>
Web: www.ike.aau.dk<http://www.ike.aau.dk/> | www.eis-all.dk<http://www.eis-all.dk/> | www.innoresource.org<http://www.innoresource.org/>
Aalborg University | Fibigerstræde 11, Office 97b | 9220 Aalborg, Denmark

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