We update our analysis of top LinkedIn Groups for Analytics, Big Data, Data Mining, and Data Science. The largest groups grow faster than smaller ones, the number of discussions is growing, but engagement and comments are declining. Are groups reaching saturation?
Next Gen Market Research (NGMR) 23,954 members, 5% growth
SAS Analytics & BI 23,641 members, 22% growth
Pattern Recognition, Data Data Mining, Machine Intelligence 20,092 members, 46% growth
We note that the 6 largest groups (in bold above, each with over 35,000 members), were in the same order as on Mar 31, 2014.
While the overall growth rate slowed down, as expected, the 6 largest groups grew at an annual rate of 57%, faster than the bottom 24 groups (32%) - see Fig 1.
Fig. 1: Top LinkedIn groups in Analytics, Big Data, Data Mining, Data Science, 2013-14 growth for top 6 vs bottom 24 groups.
Here are 10 groups with the fastest annualized growth (Nov 25, 2013 to Oct 31, 2014)
Data Mining, Statistics, Big Data, and Data Visualization: 87%
Data Scientists: 82%
Big Data and Analytics: 81%
KDnuggets Analytics and Data Mining: 73%
Predictive Analytics Network (PAN): 62%
Advanced Business Analytics, Data Mining and Predictive Modeling: 58%
BIG DATA Professionals - Architects Scientists Analytics Experts: 56%
Machine Learning and Data Science (former Data Science Central): 53%
Big Data | Analytics | Strategy | Finance | Innovation: 49%
The chart below shows group growth vs group size. Color corresponds to growth rate in 2014 vs 2013 - redder is faster, bluer is slower. Group name abbreviations are in the table below.
Fig. 2: Top LinkedIn Analytics, Big Data, Data Science Groups, Nov 2014: size vs growth
The two main measures of group activity are discussions (posts)/week and comments/week.
The figure below compares the average group size with discussions and comments/week.
We note that although group size and discussions are growing, the absolute number of comments is actually steadily declining, perhaps because members are feeling overwhelmed with too many posts.
Fig. 3: Top 30 LinkedIn Analytics, Big Data groups, 2013-2014,
Average size, comments/week, discussions/week
Since these numbers clearly depend on the group size, it is more interesting to compare them relative to group size (per 1000 members). The next figure shows that both comments and discussions relative to group size are declining.
Fig. 4: Top 30 LinkedIn Analytics, Big Data groups, 2013-2014,
Average size, comments/week, discussions/week per 1000 members
The chart below shows group comments/week per 1,000 members vs group discussions/week per 1,000 members. Group name abbreviations are in the table below. Since the distributions of comments and discussions are very asymetrical, we use median values of rather than average.
Fig 5: Top 30 LinkedIn Analytics, Big Data groups, Mar - Oct 2014,
comments/week vs discussions/week per 1000 members
4 Quadrants: Active, Commenting, Posting, and Passive For better separation of groups, both axes are on logarithmic scale
The median lines on each dimension create 4 quadrants:
Active: both discussions and comments above median:
Big Data and Analytics;
BIG DATA Professionals;
Data Mining, Statistics, Big Data, and Data Visualization;
Next Gen Market Research (NGMR); PAN; RDataMining;
Commenting: comments above median, discussions below median:
Advanced Analytics, Predictive Modeling & Statistical Analyses;
Advanced Business Analytics, Data Mining and Predictive Modeling;
Machine Learning Connection;
Research Methods and Data Science;
Posting: comments below median, discussions/posts above median:
Business Intelligence Tools;
Data & Text Analytics Professionals;
Machine Learning & Data Science (former DSC);
Global Analytics Network;
SAS & Analytics Users;
Passive (both comments and posts below median):
Big Data ASFI;
Business Intelligence & Analytics Group;
Data Mining Technology;
Healthcare Data Mining and Modeling;
Lavastorm Analytics Community Group; PMML;
SAS Analytics & BI;
The groups with the highest comments/week per /1000 members:
Data Scientists, 1.7
KDnuggets Analytics/ Data Mining/ and Data Science, 1.41
The groups with the highest discussions/week per /1000 members:
KDnuggets Analytics/ Data Mining/ and Data Science, 9.41
Data Scientists, 7.08
Big Data and Analytics, 2.99
The details are in the table with below, with groups ordered by the number of members.
The growth, comments, and discussions are in
green font if that value is 25% above median,
in red if 25% below median, and in black otherwise.
We note that there are 7 "triple green" groups, that are at least 25% above median on all 3 key parameters: growth, comments, and discussions:
Big Data and Analytics
Data Mining, Statistics, Big Data, and Data Visualization
BIG DATA Professionals - Architects Scientists Analytics Experts
Predictive Analytics Network (PAN) (PAN)
KDnuggets Analytics, Data Mining, and Data Science
Table 1: Top 30 LinkedIn Analytics, Big Data, Data Mining, and Data Science groups. Comments and Discussions are for period Mar - Oct 2014.