hi all,
me and my colleague are sitting over a model for hours... we could need help please.
we are trying to solve one of sterman's models concerning product awareness, cause we we're philosophising about our product, we are planing to launch, at least in our minds
the basic model is attached, we would need help to formulate mathematical correlations. what would be your next step looking at the model?
thanks in advance
product awareness
product awareness
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- v1.mdl
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alright, v2 is here.
our problem now is, we get an 'simultaneous equations involving' error involing 'advertising'.
we do not really understand what this means, altough we read the example solving this problem in the manual.
any help understanding this model?
our problem now is, we get an 'simultaneous equations involving' error involing 'advertising'.
we do not really understand what this means, altough we read the example solving this problem in the manual.
any help understanding this model?
- Attachments
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- v2.mdl
- (2.54 KiB) Downloaded 376 times
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- Senior Member
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This is a classic simultaneity - Sterman's book is probably a better source for understanding it than the manual
In orer to compute you need to know market share which depends on advertising which depends on revenue which depends on sales.
In real life there is a delay from revenue to advertising and from advertising to market share.
I would recommend reading a bit more of Sterman's book - I am pretty sure he covers models like this.
In orer to compute you need to know market share which depends on advertising which depends on revenue which depends on sales.
In real life there is a delay from revenue to advertising and from advertising to market share.
I would recommend reading a bit more of Sterman's book - I am pretty sure he covers models like this.
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- Senior Member
- Posts: 1107
- Joined: Wed Mar 12, 2003 2:46 pm
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- Senior Member
- Posts: 1107
- Joined: Wed Mar 12, 2003 2:46 pm