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Posted by Jay Forrester <jforestr@MIT.EDU> This message was in the K-12 discussion exchange, but I am resending to the system dynamics list because others may be interested. Jay Forrester ---------------- Begin forwarded message: First, the current crisis did not start with the burst housing bubble....

Posted by Jay Forrester <jforestr@MIT.EDU> I have recently had occasion to reread my presidential address at the 1983 System Dynamics conference, available at: http://www.systemdynamics.org/publications.htm The title,""Future Development of the System Dynamics Paradigm,"" seems a...

Posted by Jay Forrester <jforestr@MIT.EDU> On Jun 26, 2008, at 6:41 AM, SDMAIL Jack Harich wrote: > For example, unless I missed something, where are the goal suggestions > from the founder of the field, In my talk at the 2007 annual conference of the Society, I discussed the present plight of syste...

Posted by Jay Forrester <jforestr@MIT.EDU> It seems to me that the discussion in this thread has drifted away form the subject. There has been much abstract musing about social change and the difficulty of creating change. However, as I see it, the Society is not resisting change. Rather the challen...

Posted by Jay Forrester <jforestr@MIT.EDU> On May 11, 2008, at 10:26 PM, Owen Ambur wrote: > Jay, your message prompted me to look for TNC's strategic plan. I see their > vision, mission, and values statements but I don't see a clear statement of > their goals and objectives. ......... > > However, ...

Posted by Jay Forrester <jforestr@MIT.EDU> See my comments below the following quote from Harich: On May 5, 2008, at 7:23 AM, SDMAIL Jack Harich wrote: > As an example of how the right process produces the right results, The > Nature Conservancy created the Conservation by Design process. Steve > Mc...

Posted by Jay Forrester <jforestr@MIT.EDU> On Apr 13, 2008, at 7:26 AM, SDMAIL Stephen Wehrenberg wrote: > Personally I'd just be happy for a headline in the Washington Times > (somewhat conservative) and the Washington Post (somewhat progressive) > newspapers, on the same day, that said something l...

Posted by Jay Forrester <jforestr@MIT.EDU> > Posted by Jack Harich <register@thwink.org> > > My point is that ""good modeling practices,"" good enough to reliably solve > difficult problem, do not yet exist. Solving tough problems with SD is still > way too dependent on the brill...

Posted by Jay Forrester <jforestr@MIT.EDU> The switches allow one to change the values of parameters at a specified time for testing alternative policies. See simulation runs in Figures 5-1 through 6-8. [Host's note: The figures referred to are in the book ""World Dynamics,"" 197...

Posted by Jay Forrester <jforestr@MIT.EDU> The switches allow one to change the values of parameters at a specified time for testing alternative policies. See simulation runs in Figures 5-1 through 6-8. [Host's note: The figures referred to are in the book ""World Dynamics,"" 197...

Posted by Jay Forrester <jforestr@MIT.EDU> On Oct 4, 2007, at 6:27 AM, SDMAIL Monte Kietpawpan wrote: > Structual validation is key to the success of model development. > However, we have no test to determine whether a given model structure > is stable over the time horizon of interest. A model is a...

Posted by Jay Forrester <jforestr@MIT.EDU> On Oct 4, 2007, at 6:27 AM, SDMAIL Monte Kietpawpan wrote: > Structual validation is key to the success of model development. > However, we have no test to determine whether a given model structure > is stable over the time horizon of interest. A model is a...