Need bubble simulation/model

I'm looking for a simulation model: an algorithm or perhaps even
just some anlyses from which I can buld my own algorithm of a
economic bubble.

For eg. typical unsound pyramid schemes, like they had in 
Albania, or the classical [in history] Dutch tulip bubble.

Or perhaps the current petro-bubble ?

I'm wondering what the major parameters are that determine it's
life ?

== TIA