Whatever the reason, this effective tool is here to stay.

WHITEHOUSE: Unleashing Innovation & Deepening Democracy Through Prizes | The White House

But that is no reason not to use this tool to contribute to addressing this problem.

WSJ: Diamond and Saez: High Tax Rates Won't Slow Growth

Recognition is a key tool in employee retention programs for a reason: people need more than constructive feedback and positive affirmation.

FORBES: 5 Ways Leaders Rock Employee Recognition

For that reason, music has become a proven and powerful tool for marketers, which to some extent may explain the increasing interest in Spotify.

FORBES: Spotify Is Helping Brand Managers Change Their Tune

Here's what chemistry students know: For some reason, Caesar's dying breath, his last exhalation, has become a classic teaching tool in high school and college.

NPR: Commemorate Caesar: Take a Deep Breath!