Departamento Fundamentos Análisis Económico I
Universidad del País Vasco
Av. Lehendakari Aguirre 83
Institutional Affiliation: University of the Basque Country
NBER Working Papers and Publications
|November 2018||Non-Randomly Sampled Networks: Biases and Corrections|
with Chih-Sheng Hsieh, Stanley I. M. Ko, Trevon Logan: w25270
This paper analyzes statistical issues arising from non-representative network samples of the population, the most common network data used. 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 if 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 then propose a methodology, adapting post-stratification weighting approaches to networked contexts, which enables researchers to recover several network-level statistics and reduce th...