The NYTimes reports that the flies in the men’s-room urinals of the Amsterdam airport have been enshrined in the academic literature on economics and psychology. The flies — images of flies, actually — were etched in the porcelain near the urinal drains in an experiment in human behavior. After the flies were added, “spillage” on the men’s-room floor fell by 80 percent.
More at http://www.timebackmanagement.com/blog/flies_in_the_urinals

More at http://www.timebackmanagement.com/blog/flies_in_the_urinals