Ventana software support forum

Dear JJ, many thanks for your kind reply! We still hadn't thought about using lookup functions. My first feeling is that this will not work, as the lookup function would need to be updated in very period. What firms at time t expect for demand in t+1 might not be right; if this is the case, the path...

Dear admins, as part of the macro modelling work I mentioned in my previous post, one of our main aims is to move away from adaptative expectations and introduce forward-looking ones. The simple version of the problem is the following. We have a sector producing goods to satisfy an exogenous demand....

Dear Tom and admin, many thanks for your quick replies and links. I really appreciate the support service you offer to users. I think we were indeed formulating the problem incorrectly; in the process of improving the model now. I will upload as soon as we have something worthy looking at. Regarding...

Dear admins, I was hoping you could clarify a conceptual doubt I'm having. We are building a small macro model to analyse the transition to a low-carbon economic system, but often stumple open unstable behaviour of the model. Reading other threads of the forum, I started wondering whether this could...

Dear Vensim support staff, I have a model in which I am heavily using the GET XLS CONSTANT function to call initial stock values and parameter values from an Excel file. This allows me to easily change the initial conditions when initialising the run. I would now like to test some shock dynamics, bu...

Dear Admin, many thanks for your quick reply. Indeed, you were right, there was no rounding issue. Instead, there was a bug in the calibration file, which now runs smoothly. Thanks also for making us aware of the difference between 'pretty' and scientific' tables. We also modified the TIME STEP to 0...

Dear Ventana staff, I have a query regarding the GET XLS CONSTANTS function. I am building a model that needs to be calibrated to start at a stationary state. We have thus created a separate model to calibrate certain parameters, and export them into an Excel spreadsheet. We then use the GET XLS CON...