Goette, Lorenz (contributor); Huffman, David (contributor) - 2006
: raising the piece rate has zero effect on total daily effort. Previous studies have speculated that changes in motivation over … the course of the workday, caused by the increase in the piece rate, may lead to this result, but have relied on data …: they work significantly harder in early hours of work, but significantly less hard later on, with a net effect of zero on …