Archive for October, 2010

Tradeoffs in estimation under Respondent-Driven Sampling, and Chernoff faces

Wednesday, October 6th, 2010

Recently I have been working hard on finalizing the paper that we are writing with my advisor Joe Blitzstein about estimation under Respondent-Driven Sampling (RDS). Specifically, the paper aims to develop general intuition about how the process works on networks with different topologies, and what are the driving factors of current estimators' performance (or lack thereof).

To do this, we simulated many networks belonging to one of three main types (homophily, rich-gets-richer and inverse homophily), simulated many RDS processes of different configurations on each, and compared performance of the well-established Volz-Heckathorn (VH) estimator, and plain vanilla mean as point estimators under each scenario. Among other findings, it has turned out that the VH estimator underperforms the plain mean on the considered class of homophily networks, and prevails in some other cases. (more…)