Ventana software support forum

In a message dated 8/11/00 7:31:18 AM Eastern Daylight Time, Gustavo.SalaEspiell@petroken-pesa.com.ar writes: << I need the help of the community to continue explaining this person (I used Stermans new book explanation of soft variables and Forresters System Dynamics and the Lesson of 35 years artic...

In a message dated 10/28/99 6:47:23 AM Eastern Daylight Time, GBHirsch@aol.com writes: << The higher paid people attracted by these industries can afford the increasingly expensive housing, causing more of the less-expensive housing stock to be gentrified and driving out poorer folks. >> Gary - An i...

Dear System Dynamics Community: When urban areas fill their land area, why do some tip towards decay and others towards gentrified "wealthy enclaves"? Forrester, Alfeld and other modelers have offered a compelling theory explaining the first reference mode. Many of you have already read th...

I am working with another system dynamics consultant on developing a scenario planning tool for the economic/ecological forest system in northern new england. We have developed a forest sector, which is a little too detailed and undocumented to send directly. However, if you would like to describe m...

Mike -

Morecroft did a bunch of writing on this discussion, particularly in
suggesting his policy structure diagramming technique, which is sort of a
combination of stocks and flows and causal loops.

don
Dseville@aol.com

Jim -

I like the way your brain works! Not only does fitting to the data not add
much to the actual learning from the model, but it can be incredible boring
and frustrating!

don seville
dseville@aol.com

I use a package called powersim that is somewhere between ithink and vensim in capability, but it is very user friendly and quite robust. I would suggest getting more information on that package to mix in with the other options. ( you can visit thier web site http://www.powersim.com) don seville dse...