Help with error 70, equation.var pair dimensions do not match.

GAMS
1

Hi,

I am trying to solve a mcp model. I am getting error 70. Pl suggest
what needs to be done. I have looked through the guide but i could not
find information about how to declare such equations in model
statement with mcp.

FOC(I, t)…
C(I) - p(I,t) + q(I, t) =e=0 ;

Defp(I, J, t)…q(I, t) =e= (10/3) - (2/3)*P(I, t) + (1/3)*P(J, t) ;

Model Cournot /FOC.p, Defp.q/; (I am getting error here saying
dimensions of equ.var pair do not match)

Thanks
Ashu
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2

The model as written is not square which is why the matching complains.
The point it that FOC is over the set (I,t) as is the variable P (so
FOC.p is ok)
but Defp is over the set (I,J,t) and is matched to the variable q
which runs over (I,t) so the matching cannot be done - too many
equations or not enough variables.

Cheers, Michael Ferris

On Jun 25, 2009, at 12:17 AM, ashu wrote:

Hi,

I am trying to solve a mcp model. I am getting error 70. Pl suggest
what needs to be done. I have looked through the guide but i could not
find information about how to declare such equations in model
statement with mcp.

FOC(I, t)…
C(I) - p(I,t) + q(I, t) =e=0 ;

Defp(I, J, t)…q(I, t) =e= (10/3) - (2/3)*P(I, t) + (1/3)*P(J, t) ;

Model Cournot /FOC.p, Defp.q/; (I am getting error here saying
dimensions of equ.var pair do not match)

Thanks
Ashu



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3

Thanks a ton Michael.

On Jun 25, 11:12 am, Michael Ferris wrote:

The model as written is not square which is why the matching complains.
The point it that FOC is over the set (I,t) as is the variable P (so
FOC.p is ok)
but Defp is over the set (I,J,t) and is matched to the variable q
which runs over (I,t) so the matching cannot be done - too many
equations or not enough variables.

Cheers, Michael Ferris

On Jun 25, 2009, at 12:17 AM, ashu wrote:

Hi,

I am trying to solve a mcp model. I am getting error 70. Pl suggest
what needs to be done. I have looked through the guide but i could not
find information about how to declare such equations in model
statement with mcp.

FOC(I, t)…
C(I) - p(I,t) + q(I, t) =e=0 ;

Defp(I, J, t)…q(I, t) =e= (10/3) - (2/3)*P(I, t) + (1/3)*P(J, t) ;

Model Cournot /FOC.p, Defp.q/; (I am getting error here saying
dimensions of equ.var pair do not match)

Thanks
Ashu
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