for the past few years dartmouth business professor sydney finklelstein has been tracking the nation's worst c.e.o.'s. tom hudson recently spoke with him, and begins our three-part look at the nation's worst chief executives, and why they made finkelstein's list. >> school of business at dartmouthith us tonight in new york. sydney, nice to see you and welcome. you have four of the worst c.e.o.'s of the year, beginning with number 4, mark pincus, manager of zynga that relies on facebook for its success. what brought mark to your list. >> facebook and zynga announced they would go their separate ways and no longer be tied in and you can guess who that will affect more, facebook or zynga. one executive manager after anotheras lftnd that is always something i have seen as one of the reason warnings signs of something going wrong. along the way acquisition was made for $180 millujjy didn't take them more than half a year to write down 50% of the value of that acquisition. so it really look like a company that is floundering and mark pincus along the way ended out cashing out as quickly as p