NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Jaromír Kovářík

Departamento Fundamentos Análisis Económico I
Universidad del País Vasco
Av. Lehendakari Aguirre 83
Spain

E-Mail: jaromir.kovarik@ehu.eus
Institutional Affiliation: University of the Basque Country

NBER Working Papers and Publications

November 2018Non-Randomly Sampled Networks: Biases and Corrections
with Chih-Sheng Hsieh, Stanley I. M. Ko, Trevon Logan: w25270
This paper analyzes statistical issues arising from networks based on non-representative samples of the population. We first characterize the biases in both network statistics and estimates of network effects under non-random sampling theoretically and numerically. Sampled network data systematically bias the properties of observed networks and suffer from non-classical measurement-error problems when applied as regressors. Apart from the sampling rate and the elicitation procedure, these biases depend in a non-trivial way on which subpopulations are missing with higher probability. We propose a methodology, adapting post-stratification weighting approaches to networked contexts, which enables researchers to recover several network-level statistics and reduce the biases in the estimated ne...
 
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