
You don't need to be a physicist to know that Sir Isaac Newton's first law of motion is: "Objects at rest tend to stay at rest unless acted upon."
This is Newton's description of inertia — and it's also a law referenced recently at the Center for Retirement Research, by research fellow, Geoffrey T. Sanzenbacher, who is also a professor of economics at Boston College. Sanzenbacher unpacked recent research on how inertia can affect retirement savings efforts.