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Warsaw 2009: Presentations and short courses

The Internet sample

Session: Selection Bias in Panel Research (II)

Author:

Elzbieta Getka-Wilczynska; Warsaw School of Economics, Poland

Abstract:

In this presentation Poisson processes and basic methods of the reliability theory are proposed to interpretation, definition and analysis some stochastic properties of process of Internet data collection. At first, the notion of uncontrolled sample is introduced and random size of it is
defined as a counting process. At the second, the process of Internet data collection is considered as a life test of the population surveyed. The events which appear in Internet survey are interpreted as a lifetime, arrival, death of the element of the population and the basic characteristics
of reliability of the length of the population lifetime are described, calculated and estimated by using the notions and methods of the reliability theory.