Is Oprah Contagious? Identifying Demand Spillovers in Online Networks

Collective dynamics of ‘small-world’ networks

Duncan J. Watts, Steven H. Strogatz · Nature · 1998 · 43.2K citations

Engineering, Organization Studies, Sociology +14

The central role of the propensity score in observational studies for causal effects

Paul R. Rosenbaum, Donald B. Rubin · Biometrika · 1983 · 31K citations · Full text

Public Health, Biostatistics, Causal Inference +16

Sample Selection Bias as a Specification Error

James J. Heckman · Econometrica · 1979 · 28.9K citations

Social Sciences, Economics, Behavioral Economics +16

The Structure and Function of Complex Networks

Michael Newman · SIAM Review · 2003 · 18.7K citations · Full text

Engineering, Sociology, Complex Systems +16

The Strength of Weak Ties: A Network Theory Revisited

Mark Granovetter · Sociological Theory · 1983 · 8.2K citations

Social Sciences, Organization Studies, Social Influence +11