DM: Market Basket Analysis: request for references, algorithms & softwar

[Van den Poel, Dirk]

Dear readers,

I am looking for techniques to perform a market basket analysis. This
problem involves the identification of what products are purchased
together by consumers. In essence it is an association problem. Can
anyone point to a technical discussion of the algorithms (references)
used to perform such an analysis?
Currently, I only found this functionality in SAS Enterprise miner. 
But
since our access to this software is still limited, I would like to 
ask
whether anyone knows of other implementations (maybe even
free/shareware)?

Thank you very much for any related feedback,

Dirk Van den Poel
K.U.Leuven / Department of Applied Economics
Naamsestraat  69
B-3000  Leuven
Belgium
Email: dirk.vandenpoel@econ.kuleuven.ac.be