db.u

For the standalone function, see mario.calc_u().

Calculate commodity-by-activity use coefficients from use flows and activity production.

\[u=U\operatorname{diag}(X_a)^{-1}\]

Inputs#

U: use flows, with commodity rows and activity columns.

Xa: activity production, indexed like the columns of U.

Result#

Commodity nodes on rows and activity nodes on columns. Each column is expressed per unit of output of its activity.

Calculation details#

The same formula applies under IT and PT. A zero entry in Xa has inverse zero and sets the corresponding coefficient column to zero.

Example#

import mario

db = mario.load_test("SUT", tech_assumption="IT")
result = db.resolve("u")
# Dotted access requests the same block:
result = db.u

Use resolve for scenario selection and recomputation options. Existing targets are reused. The other SUT equations are listed in Resolvable Matrices and Blocks.