What can
The concept of "cultural diffusion"can best be described as?

Cultural diffusion is the spread of cultural beliefs and social activities from one group of people to another. The mixing of world cultures through different ethnicities, religions, and nationalities has only increased with advanced communication, transportation, and technology.

Explanation:

Leakages from the spending stream include savings, taxes and imports. Injections include investment spending, government spending and exports. When leakages equal injections, total spending will equal total output and the macroeconomy will be in equilibrium.