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BIG DATA in a small world Alessandro Panconesi Informatica.

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Presentation on theme: "BIG DATA in a small world Alessandro Panconesi Informatica."— Presentation transcript:

1 BIG DATA in a small world Alessandro Panconesi Informatica

2 THE STARS

3 PEOPLE

4 The INTERNET is an observatory on Crowds

5 A Paradigm Shift

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7 COMPUTATIONAL SOCIAL SCIENCE?

8 A CLASSIC REVISITED

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16 Outcome 30% of the letters reached the target Average (median) chain length was roughly six

17 Conjectures Take any two people in the world, and they will be connected by a very short chain of acquaintances

18 A matter of scale 300

19 A matter of scale 300 60,000

20 A matter of scale 300 60,000 230,000,000

21 A matter of scale 300 60,000 750,000,000 230,000,000

22 A matter of scale 300 60,000 750,000,000 230,000,000 Non trivial computational issues

23 MORE PREDICTIVE POWER?

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26 Google Flu Trends Nature 457, 1012-1014 (2009)

27 DENGUE FEVER

28 Quack Oil?

29 More Evidence Movies Hits Stocks? …

30 ETHICAL ISSUES

31 No one would have believed in the first years of the XXI century that this world was being watched keenly and closely by awesome computing and financial powers; that as people busied themselves about their various concerns they were scrutinised and studied, perhaps almost as narrowly as a person with a microscope might scrutinise the transient creatures that swarm and multiply in a drop of water. … Adapted from The War of the Worlds by H.G.Wells

32 All'inizio del XXI secolo nessuno avrebbe mai creduto che il nostro pianeta fosse sotto osservazione da parte di entità cibernetico-finanziarie di inimmaginabile potenza e che mentre l'umanità si affaccendava nella sua quotidianità i suoi movimenti venivano osservati da vicino da occhi cupidi, allo steso modo in cui i batteri che pullulano e si moltiplicano sono studiati attentamente al microscopio… Adapted from The War of the Worlds by H.G.Wells

33 FINAL REMARKS Paradigm shift in the social sciences? Computational Statistics (more predictive power) Hybrid science: data processing CANNOT be naïve New algorithms are the key Ethical caveats apply (privacy etc)

34 THANKS


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