In a study examining the relationship between pay raises, expectations, and performance, a researcher at UC Berkeley's Haas School of Business found that police performance declined sharply when officers lost in arbitration over their wages.<br><br><a href='http://www.haas.berkeley.edu/news/20061219_mas.html' target='_blank'>http://www.haas.berkeley.edu/news/20061219_mas.html</a><br><br>