Chief Data Scientist Summit 2013, San Diego, California, USA

2. Data Science of Love

3. The eHarmony Difference › Who we are
~45% Tech

4. The eHarmony Difference › Who we are
~45% Tech
~15% Customer Care

5. The eHarmony Difference › Who we are
~45% Tech
~15% Customer Care
~10% Marketing

6. The eHarmony Difference › Compatibility Matching System®

7. The eHarmony Difference › Compatibility Matching System®
Compatibility Matching
System®

8. The eHarmony Difference › Compatibility Matching System®
Compatibility Matching
System®
1
Compatibility
Matching

9. The eHarmony Difference › Compatibility Matching System®
Compatibility Matching
System®
1 2
Compatibility Affinity
Matching Matching

10. The eHarmony Difference › Compatibility Matching System®
Compatibility Matching
System®
1 2 3
Compatibility Affinity Match
Matching Matching Distribution

11. The eHarmony Difference

12. The eHarmony Difference › Compatibility Matching System®
1 2 3
Compatibility Affinity Match
Matching Matching Distribution

13. The eHarmony Difference › Compatibility Matching System®
1 2 3
Compatibility Affinity Match
Matching Matching Distribution

14. Compatibility Matching › Relationship Questionnaire
› Personality
› Values
› Attitudes
› Beliefs

15. Compatibility Matching › Obstreperousness

16. Compatibility Matching › Romantic

17. Compatibility Matching › 29 Dimensions®

18. Compatibility Matching › 29 Dimensions®

19. The eHarmony Difference › Compatibility Matching System®
1 2 3
Compatibility Affinity Match
Matching Matching Distribution

20. The eHarmony Difference › Compatibility Matching System®
Layers on Top of
Compatibility Matching
1 2 3
Compatibility Affinity Match
Matching Matching Distribution

21. Affinity Matching ›

22. Affinity Matching ›
61 21

23. Affinity Matching ›
61 21
3000

24. Affinity Matching ›
61 21
3000

25. Affinity Matching ›

26. Affinity Matching ›
… … …

27. Affinity Matching › Distance
Prob(
)

28. Affinity Matching › Distance

29. Affinity Matching › Height difference
Prob(
) 4
-­‐
8
in
cm

30. Affinity Matching › “Attractiveness”
Prob(
)

31. Affinity Matching › Zoom level

32. Affinity Matching › Zoom level

33. Affinity Matching › Zoom level

34. Affinity Matching › Food preference
25% -­‐1% -­‐24% 20% 13%
9% -­‐5% -­‐27% 7% 0%
-­‐12% -­‐21% -­‐42% -­‐19% -­‐23%
19% 0% -­‐28% 28% 10%
9% -­‐11% -­‐35% 11% 44%

35. Affinity Matching › Food preference
25% -­‐1% -­‐24% 20% 13%
9% -­‐5% -­‐27% 7% 0%
-­‐12% -­‐21% -­‐42% -­‐19% -­‐23%
19% 0% -­‐28% 28% 10%
9% -­‐11% -­‐35% 11% 44%

36. Affinity Matching › Prob( | data)
~40M
registered
users
...
...
~10^3
aCributes
?
~10^8
matches
per
day
~10^8
daily

37. Affinity Matching › Prob( | data)
data
large
sparse
redundant dense
complex
non-­‐linear
(freetext) moderate
#features
vowpal
wabbit gradient
boosted
decision
trees
?

38. Affinity Matching › Domain Specific Language
...
...
...
??
DSL
embarassingly
parallel

39. The eHarmony Difference › Compatibility Matching System®
1 2 3
Compatibility Affinity Match
Matching Matching Distribution

40. The eHarmony Difference › Compatibility Matching System®
Delivering the right
matches at the right
time to as many people
as possible across the
entire network.
1 2 3
Compatibility Affinity Match
Matching Matching Distribution

41. Match Distribution › Graph optimization

42. Match Distribution › Graph optimization

43. Match Distribution › Graph optimization
2 2

44. Match Distribution › Graph optimization
2 1 2

45. Match Distribution › Graph optimization
2 Prob( 1 | data) 2

46. Match Distribution › Graph optimization
2 Prob( 1 | data) 2

47. Match Distribution › Graph optimization
2 Prob( | data) 2

48. Match Distribution › Graph optimization
2 Prob( | data) 2

49. Guided
Resulting Customer Experience › Communication

50. Guided
Resulting Customer Experience › Communication

51. Guided
Resulting Customer Experience › Communication
? !

52. Resulting Customer Experience › Success!

53. Resulting Customer Experience › Success!

54. eHarmony Results › The eHarmony Impact
2005
90
eHarmony Members
Married Every Day *
* According to a Harris Interactive survey for eHarmony

55. eHarmony Results › The eHarmony Impact
2005 2007
236
eHarmony Members
Married Every Day *
* According to a Harris Interactive survey for eHarmony

56. eHarmony Results › The eHarmony Impact
2005 2007 2009
542
eHarmony Members
Married Every Day *
* According to a Harris Interactive survey for eHarmony

57. @petricek linkedin.com/in/petricek