Model Time

[Filipe]

Hello.

I am modelling an acquisition that will be made 3 years after I start running my model. Is there a way of modelling this?

I have a "acquisition variable" that would be set up to 1 after 3 years. Imagined being something like

IF THEN ELSE ( TIME = 3, 1, 0)

but this does not work.
Thank you so much!!

[tomfid]

If you want it to be 0 until time 3, then 1 thereafter, use STEP(1, acquisition time) with acquistion time = 3

Another option would be to use a level:

AcquisitionIsMade = INTEG( Acquisition Rate, 0) ~ dmnl
AcquisitionRate = PULSE(acquisition time,TIME STEP)/TIME STEP ~ 1/year

Tom

[Filipe]

Tom,

Thank you for your reply.

The idea is to make it 1 only in Time 3, then is set back to 0. I am only investing once.

Thank you!

[tomfid]

Ahh, OK. Then your IF THEN ELSE should work. If not, it could be due to roundoff error: if Time isn't exactly equal to 3, the equation will fail, even though 3.0001 might be close enough from your perspective. As an alternative, you can do one of two things:

IF THEN ELSE( time > AqTime-TIME STEP/2 :AND: time <= AqTime+TIME STEP/2, 1, 0)

PULSE(AqTime,TIME STEP)

Tom

[Filipe]

Tom,

It's working!

Thank you