For Neiman Marcus, the theory was that the partnership would let it capture the value-oriented shopper without having to set up its own outlet like Nordstrom Rack.

FORBES: Department Store Pricing -- No Easy Task (Part 4 Of 4)

In 1919 German physicist Albert Betz published a theory that no turbine can capture more than 60 percent of the kinetic energy in wind.

FORBES: New Zealander Pitches Mindblowing Idea