I am currently a member of 40 LinkedIn groups mostly targeted at Master Data Management, Data Quality and Data Matching.

As I have noticed that some groups covers the same topic I wondered if they have the same members.

So I did a quick analysis.

With Master Data Management the largest groups seems to be:

• Master Data Management Interest Group with 2.818 members.
• MDM – Master Data Management with 2.333 members.

Using the LinkedIn Profile Organizer I found that 907 are members at both groups. This is not as many as I would have guessed.

With Data Quality the largest groups seems to be:

• Enterprise Data Quality with 784 members.
• The Data Quality Association (former European Data Quality Network) with 753 members.

Using the LinkedIn Profile Organizer I found that 189 are members at both groups. This is not as many as I would have guessed despite the renaming of the last group.

As for Data Matching I have founded the Data Matching group. The group has 235 members where:

• 77 are members in the two large Master Data Management groups also.
• 80 are members in the two large Data Quality groups also.

Also this is not as many as I would have guessed.

You may find many other similar groups on my LinkedIn profile – among them:

• Data Quality Pro.com with 252 members (main site has +2.000 members)
• Obsessive-Compulsive Data Quality (OCDQ) with 154 members (blog has heaps of visitors)