GEMPACK imposes no size restrictions if you have:
GEMPACK does impose a size limit on the model you can solve in two cases:
The limits in both these cases are the same, and are shown below. Notice that the limits are substantially enlarged for the April 2009 Release 10.0-001 of GEMPACK. If you are running a model-specific EXE file created by someone else who used an earlier GEMPACK version, the previous lower limits apply.
In older GEMPACK documentation, the limits below were described as defining "medium-sized" models.
| Limit | Value for GEMPACK Release 10.0 and earlier |
Value for April 2009 GEMPACK Release 10.0-001 and later |
| Total number of (components of) endogenous variables (condensed or backsolved) |
30,000 | 75,000 |
| Total number of (components of) variables (exogenous and endogenous, condensed or backsolved) |
35,000 | 120,000 |
| Total number of (components of) condensed endogenous variables |
10,000 | 35,000 |
| Total number of (components of) condensed variables (exogenous and endogenous) |
16,000 | 70,000 |
| Number of nonzeros in the Left Hand Side (LHS) Matrix (for any step of the simulation) |
75,000 | 175,000 |
| Total number of reals and integers used for coefficients (pre-simulation and updated), plus those used to store simulation results |
250,000 | 300,000 |
| Maximum no of sectors in typical single region model | 40 | 40 |
| Maximum size for standard GTAP model | 9 sectors 9 regions |
12 sectors 12 regions |
Note: Most GEMPACK models are made more compact by omitting, substituting, or backsolving some variables. Variables which are neither omitted, substituted or backsolved are called condensed. The limits above include only condensed and (in some cases) backsolved variables.
See also
Different versions of GEMPACK
Table comparing different versions of GEMPACK