Coming out of the previous argument on the efficacy of football managers, comes a nice little podcast from the University of Warwick on changes made in managerial practice. That is all dinky and possibly not as significant as Dr Sue Bridgewater thinks, however the stats she presents us with the stark stat of 678 managerial changes in the four English leagues in the last thirteen years. Which in average (and hey, we know averages mean nothing in this game) means every club changes its manager every two years or less. Worth eighteen minutes of your time.