Error in estimating an Exponential Trend

[vksf]

I am using Eviews 8 and I am getting an overflow/error message when I am estimating an exponential trend. I have typed the following equation under the quick tab using LS. (r is the independent variable and t=1,2,... is the time trend) Please find my workfile attached.
r c(1)*exp(c(2)*t)

It would be great if someone could help with this problem

[EViews Gareth]

You're missing an equals sign

[vksf]

Thanks Gareth. Even with the = it does not work.
I've even tried typing ls r = c(1)*exp(c(2)*t) in the command window

[vksf]

I redid the exercise and it says "Near Singular Matrix Error. Regressors may be perfectly collinear"

[startz]

Try typing

Code: Select all

c=0.5

before you do the estimate

[vksf]

Thanks but does this solve the singularity issue? What is the basis for selecting c?

[EViews Gareth]

Just choose something other than zero. It should remove the singularity error.