Two - thirds of the calendar years produced returns of more than 20 % or less than — 10 %. (moneysense.ca)
In most cases, it's simply impossible to tell whether or not the ad is producing return on investment. (lawyerist.com)
As a result, a tidal power scheme may not produce returns for many years, and investors may be reluctant to participate in such projects. (americanbuilt.us)