[Forum SIS] Avviso di seminario .:. Prof. Lucio Barabesi, Univ. di Siena

[Maria Giovanna Ranalli]

Martedì 14 Febbraio ore 12
Dipartimento di Economia, Finanza e Statistica, Aula 201
Università degli Studi di Perugia
.: Lucio Barabesi, Dipartimento di Economia Politica e Statistica, Università di Siena :.
.: Properties of design-based estimation under stratified spatial sampling :. 

Abstract
The estimation of the total of an attribute defined over a continuous
planar domain is required in many applied settings, such as in ecology,
forestry and stereology. If the design-based approach is considered, the
scheme for the placement of the sample sites over the domain is fundamental
in order to implement the survey. In real situations, tessellation-based
schemes and stratification-based schemes are often adopted. In the present
communication, the properties of the spatial total estimator under these
types of schemes are considered. In particular, it is shown that these
schemes give rise to unbiased spatial total estimators which are
“superefficient” with respect to the estimator based on the uniform
placement of independent sample sites over the domain. In addition, the
large-sample normality of the estimators and the variance estimation issues
are discussed. 


cordialmente

M. Giovanna Ranalli

~ Dipartimento di Economia, Finanza e Statistica
~ Sezione di Statistica
~ Via Pascoli
~ Universita' degli Studi di Perugia
~ 06123 Perugia - Italy

~ Tel +39 075 5855245
~ Fax +39 075 5855950
~ url: www.stat.unipg.it/~giovanna