st: Question regarding "multiple responses"

[Sehee Han <seheeking@gmail.com>]

Hello,
I have a question regarding "multiple responses". I know that stata's
mrtab command can deal with multiple responses (by a regular variable)
but is it possible for the mrtab command, or for any of stata's
commands, to deal with multiple responses (by multiple responses)?
For example, let's say I have two multiple choice questions.
Which of the following conferences have you participated in? (Check
all that apply)
1. Economics 2. Sociology 3. Engineering


And secondly, how did you learn about the conferences you have
participated in? (Check all that apply)
1. Father 2. Mother 3. Professor 4. Friend


Using the responses, I would like to make a 2-way table showing
"multiple response by multiple response".


Many thanks.
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