Jon, as always I really enjoy your data and perspective. I would like to get your opinion on what was going on between the years of approximately 1975 and 1983 on the number of NCAA average field goal attempts. I notice that the NCAA data is rather smooth and shallow sloped before and after that time. However, there was a fairly steep drop of approximately 68 to 58 attempts on goal. That doesn't sound like a huge drop but it certainly gives the appearance of being out of character with changes in other similar time frames.
The only significant thing I can put my finger on it Rupp's departure in 72 meaning that his influence would be lost from 72-73 onward. And from personal observation, I can say that coaches were shifting their philosophy from pushing the ball offensively to very aggressive defense and higher percentage shot selection around that time. The three point shot didn't account for the dip as that did not come into play until the mid to late 80's. Now the dunk came back into the picture in the mid 70's but I wouldn't have figured it would have exerted a downward pressure on number of attempts on goal.
Is it possible that Rupp's departure was so strongly felt by the game? Could his retirement have actually caused a trend toward the "defense first" mindset? Surely not, but I thought it was an interesting trend in the data for that 8 years.
In general I don't think one can attribute an overall change to a single coach, no matter how influential. Remember the red dots in the charts are for the overall NCAA average, which at any given time could represent the average of between 200 and over 300 schools.
Again, here's the chart showing FGA over time.
The chart showing possessions per game doesn't go back as far but does capture the time frame in question and shows a similar trend.
If you look at just the blue dots (UK) then coach Hall did retain the pace at least until 1976, but it slowly dropped thereafter in concert with the NCAA average.
Why the slowing of pace during that time, I don't know. There were a few things going on at the time, including widespread integration of teams (i.e. much more significant than the tokenism that occurred before even among schools that had been signing black players).
I think that the game itself was getting rougher, which in part can be attributed to people like Coach Hall among others who were emphasizing strength and conditioning along with defense.
Of course as mentioned, you also have people like Dean Smith who were using stall tactics etc. which certainly didn't help matters.
As you can see from the charts, the drop in pace was finally arrested in the mid-80's, in concert with the adoption of the shot clock and three-point line, and there was a brief uptick in the early 90's but that has since dropped down to some of the lowest levels seen in modern history (if not before).
That's why you hear a constant rattle among some (including myself BTW) that the NCAA needs to take some pretty drastic steps to clean up the game and make it more appealing. Some of the proposed steps made in the past few years look to be promising, but they need to see them through.