Looking for Club Of Rome/Limits To Growth model source code?

[benburch]

Does anybody know if the FORTRAN IV code that the models in The Club of Rome's famous book "Limits To Growth" were based upon has ever been published?

And if so, where might I find copies of same?

Thanks!

-Ben Burch

[McKenzie]

1. two Google search strings that might help

I'm on the run so can't look in detail. I noticed one site in there that has downloadable Fortran models for carbon emissions but they're in Fortran 77 and 90.

http://www.google.co.uk/search?as_q=fortran&num=100&hl=en&btnG=Google+Search&as_epq=club+of+rome&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_occt=any&as_dt=i&as_sitesearch=&as_rights=&safe=images

http://www.google.co.uk/search?as_q=fortran+&num=100&hl=en&btnG=Google+Search&as_epq=limits+to+growth&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_occt=any&as_dt=i&as_sitesearch=&as_rights=&safe=images

[bananas]

2. Maybe Dr. Peter Vajk still has a copy.

From one of those google hits:
http://www.islandone.org/MMSG/9701_05.html
-----Aurelio Peccei, the Italian industrialist who headed the Club of Rome report (which sponsored the Limits to Growth computer model), admitted that false information was intentionally added to make it more effective in alarming people (I suspect that he was talking about the extra factors of four that Dr. Peter Vajk found in the FORTRAN code).

[benburch]

3. Got an answer...

Mr. Burch,

I am responding to the letter you sent the Club of Rome.

Our initial version of World3 was published and excruciatingly documented in a 600+ page book, "The Dynamics of Growth in a Finite World." That book is still sold by Pegasus communications. The discussion of the theory and the data underlying the equations is still intereesting, but the equations themselves were written in DYNAMO a computer language that has become obsolete.

http://www.pegasuscom.com/BookSearchResultList.asp?BookQuery_Action=Filte
r(%22++Keywords+LIKE+%27*System+Dynamics*%27%22)

In 1992 we made minor revisions in the model for our book, "Beyond the Limits." The appendix to the book tells precisely what was changed. Mainly it was in the formulation of the policies embedded in the technology change sector. In 1992 we used an early version of STELLA for composing the model.

For the 2004 book, "Limits to Growth - the 30-Year Update," we made again a couple of minor changes. Now you can get the model in a STELLA runtime version on a CD with an interface that lets you reproduce all the scenarios published in our book and examine 74 parameters every 5 years from 1900 to 2100 for each scenario.

If you write to the Sustainability Institute you can buy this from them.

http://www.sustainer.org/tools_resources/games.html

Cordially,
Dennis Meadows