This was the first indication of the campaign, a sign announcing a speech and meet-and-greet with Musavi in Yazd. As advertisement for Musavi got more numerous in the coming weeks and still none appeared for Ahmadinezhad, there were two explanations. One is that the system is dumping Ahmadinezhad because he's a screw-up and the other is that he doesn't need to put up advertisements because he knows he's going to win and the powers that be are just trying to make things look competitive. Both possibilities have a degree of truth. Additionally I heard that 'for the system' it was important to have a sitting president ousted after only four years. What underlines these ideas is that the government is corporatist and that vibrant competition happens within certain parameters. Similar to Israel, but not as constrained.