matrix operations via GAMS Embedded Python: multi-regional Input-Output tables

Wassily Leontief in front of an IO table, credit:NYU

Inverting a dense matrix

GAMS allows running pieces of Python code as part of a GAMS model. Unfortunately, the interface is rather low-level and inefficient.  Usually "low-level" is associated with high-performance, but in the Python world, this is not the case. Here is an example.