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From |
"Andre pierre" <hcpats@hotmail.fr> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Question on data manipulation |

Date |
Fri, 21 Oct 2005 11:48:08 +0200 |

Dear Stata users,

I have a question, for which the answer might be simple, but I did not find it yet.

I am working on a datset that contains information on innovating firms. My question might be more understandable with the following example:

Firm 1 has 3 innovations (A, B and C). A and B have one caracteristic in common (x); B and C have another caracteristic in common (g), while Innovation D does not have the same caracteristic as any of the other innovations.

I would like to create a dummy that takes the value one if an invention by a given firm has at least one caracteristic in common with one of the other innovations by the the same firm. My question is how can I get this dummy?

Firm; innovation; carateristic; dummy

1; A; x; 1

1; A; y; 1

1; A; z; 1

1; B; x; 1

1; B; g; 1

1; C; g; 1

1; D; f; 0

Thanks,

André

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**Follow-Ups**:**Re: st: Question on data manipulation***From:*Susanne und Ulrich Kohler <suli.kohler@web.de>

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