Originally Posted by DeltaBetaBaby
I have been thinking through the math on this, and it seems that, to maximize placements, they should use the same calculations as in RFM, but substitute in each chapter's bed quota for the "calculate quota" step used on other campuses. However, I have a feeling that's not what is happening here. Does anyone know how the number of invites are decided?
(For example, if your bed quota is 25, and you have historically had a 50% return rate, you should be allowed to invite 25*3/.5 = 150 women to pref.
Let's go through a full example. Say there are three chapters: chapter A has a bq of 25, B has a bq of 25, C has a bq of 50, and C has a bq of 50. Their return rates for pref have historically been 50%, 50%, 100%, and 100%, respectively. After prefs, PNM's choose a chapter at random (i.e. there is an equal chance of all possible ranking orders on their bid card).
So, we have room for 150 women in the three chapters. We'd expect that all four chapters can invite 150 women, and each PNM will go to C, D, and their choice of A or B. Three rounds of parties, each PNM has a full schedule, and each PNM ends up with a bid.
Now, let's say that C instead invites 200 women to their prefs. There are now 200 women attending prefs, but only 150 bids available. 50 women will go bidless, because group C has 200 women at their parties, but only 50 bids to give out, and the other 150 women can not be absorbed by the other three chapters.
I chose neat numbers to make the math easy, but I am fairly convinced that the RFM logic still works with a bed quota system, and I am unclear on whether it is used at IU.)
|