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Big Blue buys SPSS

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SR Millis-3

Big Blue buys SPSS

http://www.marketwatch.com/story/ibm-to-buy-spss-inc-in-12-billion-cash-deal-2009-07-28

Scott R Millis, PhD, ABPP (CN,CL,RP), CStat, CSci
Professor & Director of Research
Dept of Physical Medicine & Rehabilitation
Dept of Emergency Medicine
Wayne State University School of Medicine
261 Mack Blvd
Detroit, MI 48201
Email: [hidden email]
Tel: 313-993-8085
Fax: 313-966-7682

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Gyorgy Bea

methodology problem - suggestions are very much appreciated

Hi All,

I have the following problem. Respondents are asked which of the following categories have bought on their last shopping trip:

Category 1
Category 2
Category 3
Category 4
Category 5

Than they are asked to specify for each category what exactly have they bought:

Category 1
    Subcategory 1
    Subcategory 2
    Subcategory 3
    Subcategory 4
    Subcategory 5
      ....
    Subcategory N1

Category 2
    Subcategory 1
    Subcategory 2
    ....
    Subcategory N2
    etc.

I would like to see which Subcategories are bought together, inside and across the main categories.
All the answers are binaries, 1 indicating the presence and 0 the absence of the item.

It is the first time I face this kind of problem, so I'm a bit lost....
What do you think would be the best analysis for this? Maybe factor or cluster analysis?

Any suggestion is highly appreciated.

Thanks,
Beata

Spousta Jan

Re: methodology problem - suggestions are very much appreciated

Hi Beata,

start with http://en.wikipedia.org/wiki/Market_basket_analysis - it will lead you further. There is a lot of literature about it - look at Amazon.com etc., and there is a lot of software, too (http://www.spss.com/software/modeling/modeler/ and many others).

Best regards,

Jan

From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Gyorgy Bea
Sent: Tuesday, July 28, 2009 6:21 PM
To: [hidden email]
Subject: methodology problem - suggestions are very much appreciated

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Gyorgy Bea

Re: methodology problem - suggestions are very much appreciated

Hi Jan,

Thanks a lot for the recommendations, they were really helpful. :-)

Best regards,

Beata

From: Spousta Jan <[hidden email]>
To: [hidden email]
Sent: Wednesday, July 29, 2009 10:14:38 AM
Subject: Re: methodology problem - suggestions are very much appreciated

Hi Beata,

Best regards,

Jan

_____________

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