弱いつながりは転職に有効なのか？ / Weak Ties and Job Change

■イベント
conference, on computer science for enterprise
https://ccse.jp/2019/

■登壇概要
タイトル：弱いつながりは転職に有効なのか？

登壇者：DSOC R&Dグループ 西田貴紀

▼Sansan Builders Box
https://buildersbox.corp-sansan.com/

Transcript

1. 
   
   Dynamic Network Signatures of Labor Flows: Evidence from a Large Business Social Network
   Takanori Nishida
   (Sansan Inc., Tokyo, Japan)
   Lav R. Varshney
   (University of Illinois at Urbana-Champaign)
   Yoshiki Ishikawa
   (Habitech, Inc., Tokyo, Japan)
   

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2. Motivation
   
   
   
   
   ( )(
   

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3. Strength of Weak Ties Hypothesis
   

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4. Bird’s-Eye View
   Static
   Dynamic
   Online Offline (Face to Face)
   
   
   
   
   
   
   

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5. 
   
   
   
   

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6. Data Visualization ~Dawn of Innovation~
   0 1 2 0 2
   

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7. Data
   Eight
   #'*/2015,1"2017,12"
   )3 /%&. &.Eight21 0!(
   +-$1
   

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8. User Profile
   
   
   

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9. Longitudinal Dataset (Unbalanced Panel Data)
   1st wave
   2nd wave
   3rd wave
   Jul 2015 Jan 2016 Jul 2016
   Jan 2017
   Jul 2017
   6 months 6 months
   T
   T-1
   T-2
   T
   T-1
   T-2
   6 months
   T
   T-1
   T-2
   6 months
   
   

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10. Empirical Definition of Weak ties and Strong Ties
    
    T-2 T-1 T
    
    =Δ Clustering coefficient
    = # of New Bridging Ties
    
    Ties in same community
    Bridging Ties
    

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12. 
    
    

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13. Empirical Model
    
    ̈
    "#$
    = &' ̈
    (#$)* /$),
    + ̈
    .#$
    /ℎ121 ̈
    345
    = 345
    − 7
    34 (within transformation),8
    34
    = 1/: ∑4<=
    > 345
    
    
    W W
    W - -
    W W 1 2T
    : ; ( ) W
    

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14. Results
    ) *-
    10
    .) *-
    T-1 T
    T-2
    (
    R-squared:0.114
    Num. obs.: 417,428
    - Standard errors in parentheses
    - ***p < 0.001, **p < 0.01, *p < 0.05
    ) ( ( 0 -
    

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15. Discussion
    
    
    -
    
    
    -
    
    

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