Alfred Marshall taught us that they work together as in the two blades of scissors, but I guess that was primarily in a micro-economic context.

FORBES: We Need Demand, Not Protectionism

The crime spree spanned across a wide swath of Southern California, prompting several police agencies, including the FBI and US Marshall Service, to form a joint investigative task force.

WSJ: L.A. Authorities Announce $1 Million Reward for Ex-Officer Christopher Dorner

First, compositing supervisor Marshall Krasser reminds us that in order to truly convey the number of layers in each of these shots, these slide shows would have to be ten times longer and far more detailed.

FORBES