Social Media. May 19th 2018. Data Driven Innovation 2018. Engineering Department, Univeristy of Roma Tre

1. Detecting and predicting life
events from online user activities
Daniele Miorandi
CEO, U-Hopper
daniele.miorandi@u-hopper.com

2. So, what is a life event?

7. “A major event in a personal life that will
trigger a process of reconsidering current
behaviour”
(van der Waerden et al, 2003)

8. Formalising life
events
based on Holmes-Rahe stress scale
1. Death of spouse (100)
2. Divorce (73)
3. Marital separation (65)
4. Jail term (63)
5. Death of close family member
(63)
6. Personal injury or illness (53)
7. Marriage (50)
8. Fired at work (47)
9. Marital reconciliation (45)
10. Retirement (45)

9. Why bother?

10. Life events have a deep effect on the individual’s
spending habits and purchase patterns
Knowledge on life events opens up opportunities
for up- and cross-selling

11. How to do it?
Explicit
surveys, interviews
Implicit
monitoring behaviour

12. Detect and predict the occurrence of
life events based on social media
user activities
Our goal:

13. Feasible?

14. Feasibility - The Tech side
Model-based AI-based
+
socio-demographics
context
social media actions

15. Model-based
• You build a model of how users react to
the occurrence of an event on social
media
• Join new groups on Facebook?
• Follow new accounts on Twitter?
• Post help requests?
• Pictures on Instagram?

16. AI-based
• You create an annotated training set
(timeline/occurrence of life event)
• Let ML do the job

17. AI-based (under the hood)
Raw content
(text, images,
hashtags,
groups etc.)
Enriched
content
Entity extraction,
categorisation,
sentiment, automated
image annotation
Relevance
(with accuracy)
Classifier

18. AI-based - looking for changes
• Looking for behavioural changes
—> Looking for changes in
activity patterns
• Analysing the frequency of posts
focussed on a given life events
(and the reaction of the user’s
social network)
0
17.5
35
52.5
70
Jan Mar May Jul Sep Nov

19. AI-based: Issues
• Diversity
• Different people, different age groups, different cultures etc. behave wildly different when it
comes to sharing life events related information
• Different behaviour on different social media platforms
• Holds also for model-based approaches
• Data
• For training classifiers
• For benchmarking purposes
• For performance evaluation

20. Which precision/recall can be achieved?

21. Feasibility - The legal side
Is it legal?
What about GDPR?
Is it ethical?

22. GDPR?
• We are dealing with the processing of personal information (Art. 4
GDPR)
• The user must express explicit consent (Art. 5 GDPR)
• This does not fall within special categories of personal data (Art. 9
GDPR)
• We use personal information for automated, individual decision-
making, including profiling (Art. 22 GDPR)

23. Compliance with GDPR
Social login as a handler for informed consent

24. Summary
• Life event detection and prediction from social media activities is
feasible
• It can comply with GDPR, but informed consent to be handled with
care
• Science&Tech: Missing reference dataset and benchmarks
• Innovation&Business: Missing empirical validation of value for
marketers
To know more: daniele.miorandi@u-hopper.com