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I am building a predictive model for the growth of the amount of users of a new p2p protocol inspired by bitcoin and I would like to use historical data collected from the growth of major social networks in my model. My specific questions are the following:

  1. Does a public database exist containing growth data for major social networks?
  2. Does there exist a generally accepted method for estimating contagion given specific network characteristics/assumptions?
  3. I need to account for the loss of users over time and thus I need a proper way of measuring node death and its impact upon connected nodes in the model. Is there a generally accepted method to estimate this given some set of parameters?

As a side note, I am uncertain, which stack exchange to post this question in or the best way to format the question for this channel. If there is a forum one could recommend in the comments that is better suited, then I would appreciate the advice.

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    $\begingroup$ seems ok to me but am widely regarded as too liberal. might fly better on Cross Validated or the new Open Data. it seems one could use the bitcoin blockchain to estimate growth. contagion/spread of bitcoin is highly related to social factors & not hardware characteristics & a model can only make major assumptions. also contagion is likely to vary over time. etc... also Bitcoin is at times open to some other ecurrency-related questions. there was a somewhat similar recent highvoted question on facebook spread, stats.se somewhat an antimodel $\endgroup$ – vzn Mar 25 '14 at 4:43

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