A quick update to show the impact of the Wallabies win on the model. (With England vs Wales still to play this weekend)
I expect most big moves like this are an over-correction and that over time things move half way back to where they were, but that doesn't mean the new numbers are any more wrong than the old numbers.
The upshot is, the tournament is wide open. It isn't New Zealand vs the field any more.
Potential World Champions:
Wales - 33%
+6 Chance (runner-up 19%
-6)
New Zealand -
25% -19 Chance (and for runner-up 21%
-3)
Ireland - 16%
+3 Chance (runner-up 13%
-2)
South Africa -
11% +4.0 Chance (runner-up 17%
+2)
England - 9.5%
+1.5 Chance (runner-up 14%
NC)
Australia -
4.5% +4.0 Chance (runner-up 11%
+7)
Scotland - 0.2%
+0.1 Chance (runner-up 1.6%
+0.2)
Japan - 0.2%
+0.2 Chance (runner-up 1.6%
+1.0)
France - 0.2%
+0.2 Chance (runner-up 1.2%
+0.2)
Fiji - <0.1% +<0.1 Chance (runner-up 0.1% NC)
And a 0.1% NC Chance the runner-up will be Argentina
Another thing - Scotland and Japan both have a 51% chance of qualifying for a QF.
Pool A is a pool of death! Ireland, Scotland and Japan are all individually more likely than not to progress, but one of them has to fall short.
(Ireland's chance of progressing is 98.2%, Samoa 0.3%)
EDIT: Potential World Champions post Eng v Wal
Changes are vs last week
We now have the top 5 teams within 2.23 RP of each other and each with a >10% chance to win.
New Zealand -
26% -18 Chance (and for runner-up 19%
-5)
Wales - 25%
-2 Chance (runner-up 20%
-5)
Ireland - 18%
+5 Chance (runner-up 14%
-1)
England - 14%
+6.0 Chance (runner-up 16%
+2)
South Africa - 12%
+5.0 Chance (runner-up 17%
+2)
Australia -
5.0% +4.0 Chance (runner-up 10%
+6)
Scotland - 0.3%
+0.2 Chance (runner-up 1.6%
+0.2)
France - 0.2%
+0.2 Chance (runner-up 1.2%
+0.2)
Japan - 0.2%
+0.2 Chance (runner-up 1.2%
+0.6)
Fiji - <0.1% +<0.1 Chance (runner-up 0.1% NC)
And a 0.1% NC Chance the runner-up will be Argentina
Also note that unless England has a draw vs Wales next week or Ireland the week after, one of those 3 will *officially* top the rankings table. NZ's position at the top couldn't be much more tenuous than that.
(HT @The Alpha Bro )