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[quote=Anonymous][quote=Anonymous][quote=Anonymous]Found this more detailed description of the Denver system, which is designed by the same team and has been described as the model for the DC system:

http://www.aplusdenver.org/_docs/FINAL_TC%20Letter%20to%20Denver%20Community%20Members.pdf

Can't cut and paste properly, but the algorithm steps are described in page 4 of that pdf.  Key things I took away

The lottery is run for each school, based on the ranking of the students of that school.  So all the students who ranked that school #1 are run through the lottery and randomly assigned.  Then the students who ranked it #2 are slotted in below them, etc.

This also helps:

http://media.nola.com/education_impact/photo/diagram-enrollment-041512jpg-aea0b995c0aa929b.jpg

That's the New Orleans system.  It seems to me to imply a lottery for each school individually.

These are all designed according to the so-called "Deferred Acceptance Algorithm", which goes back to 1962.  It's commonly accepted to be the best way to do this sort of thing.

[/quote]

As a followup, the system is being designed by these people:

http://www.iipsc.org/index.htm

It's chair is Alvin Roth, who won the Nobel Prize in economics for his work in this area.  I have a hunch they know what they are doing.

http://www.nytimes.com/2012/10/16/business/economy/alvin-roth-and-lloyd-shapley-win-nobel-in-economic-science.html?pagewanted=all[/quote]

Oh, I  agree that the company designing the algorithm knows what it is doing. I just don't have faith that the DC representatives understand it or are able to communicate how it will work with the public, which is key to making your lottery selections.

And to the PP who insisted that this is the same lottery as last year, just with more schools, I really don't think that is correct.[/quote]

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