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Re: st: A question about binary outcomes

From   C Engelbrecht <>
Subject   Re: st: A question about binary outcomes
Date   Wed, 29 Sep 2010 08:41:47 -0700

Thank you Austin, for your reply. However I'm not sure clogit or
asclogit is appropriate here, because each auction has different set
of bidders, so the alternatives are changing. I checked out clogit and
asclogit, and it seems that you need a pre-specified set of
alternatives, such as presidential candidates, or travel modes.

For instance, (this is a reverse auction, only one winning seller in
each auction)

Auctionid, buyerid, sellerIsChosen(Y),sellerid, sellercharacteristics

Sorry I wasn't clearer in my initial post and thank you for any
suggestions you can provide.

Thank you!

On Tue, Sep 28, 2010 at 9:44 PM, Austin Nichols <> wrote:
> C Engelbrecht <>:
> See help clogit
> and help asclogit
> for starters.
> On Wed, Sep 29, 2010 at 12:07 AM, C Engelbrecht <> wrote:
>> I'm not sure if Probit / Logit is the appropriate model here, and I
>> hope someone can give me some suggestions.
>> Suppose we have a competitive auction process. A, B, C,... F all place
>> bids in an auction hosted by Z. Z can only pick one. Now I want to
>> study what drives that choice. Currently I am modeling it as a binary
>> choice, i.e. for each bid (A, ..., F) the outcome is either winning or
>> not winning. But this seems to disregard the fact that only one of
>> them can be winning. Is this an unnecessary concern? If not, how would
>> you suggest addressing it?
>> Many thanks,
>> Charlie
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