Ventana software support forum

The tone of George Backus comments is brilliant, but the substance contains a couple of errors which ought to be corrected. First, George Richardsons equation is a step forward, not a redundancy. The point is to avoid having the allocation exceed the request Tj, and George R.s equation does that. It...

There are several ways to interpret your question, but I believe what you may want is a deterministic "delay" system with an impulse response that happens to have the (deterministic) shape of the normal distribution with mean 20 and variance 1. The classic SD attitude would be to think of ...

I strongly agree with John Stermans position that data-consistency is very important and almost always useful, even though it is not the only test of model quality. However, I would offer one tiny correction to his statement, "... when one cannot replicate the data ... alarm bells should go off...

About parameters and validity of aggregate models: Geert Nijland raised an important question about the validity of aggregate models. Having dug into this area pretty deeply, I have concluded that 1) aggregate models of social systems are often valid, and 2) disaggregation can lead to less realism, ...