This means that something else has to go: you might use vacation days, you might reserve specific evenings and weekend hours, and you might have to inform family and friends that you will not be around as much.

FORBES: Balancing A Job and Side Business, Part 1: Time and Energy

To be specific it is excess reserve accounts at the Federal Reserve, which in the modern world are actually electronic.

FORBES: Congress' Money Vault

In the specific case of the Federal Reserve, its dual mandate requires it to focus on price stability and maximum employment.

FORBES: Deflationary PPI Questions Effectiveness Of Bernanke's QE