The undersigned is a user of the individual data matrices (microdata files) corresponding to the studies:

distributed by ARCES/CIS. The undersigned undertakes to keep the data confidential in accordance with current law, that is:

• The data shall not be used for any purposes other than research.
• No attempt shall be made to identify the individuals surveyed.
• No copies of the individual data shall be distributed to third-parties, in whole or in part.
• Access to the data shall not be given to any researcher who has not signed this document.
• Data shall always be published together.

Name	ID Number	Position	Signature