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Université de Neuchâtel

Handling auxiliary variables in survey sampling and nonresponse

Vallée, Audrey-Anne ; Tillé, Yves (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2019.

This manuscript is dedicated to the use of auxiliary information in survey sampling and nonresponse. We are interested in the integration of auxiliary variables in sampling methods and in the treatment of nonresponse to improve the efficiency and the precision of surveys. We also deal with the calculation of the precision of estimators. Indeed, variances rapidly become difficult to calculate when...

Université de Neuchâtel

Estimation of a counterfactual wage distribution using survey data

Anastasiade, Mihaela-Cãtãlina ; Tillé, Yves (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Wage discrimination based on gender is a debated topic nowadays. While wage discrimination is prohibited by the Universal Declaration of Human Rights, studies show that women are systematically paid less than men. Wage discrimination is defined as the fact that two groups sharing the same characteristics and performing the same tasks are paid differently. However, this definition is not easy to...

Université de Neuchâtel

Random sampling with repulsion

Wilhelm, Matthieu ; Tillé, Yves (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

In this thesis, we explore the concept of repulsion and exploit it to develop new sampling designs. The first chapter is a review of the literature about sampling in finite population and consists of two distinct parts. In the first one, we suggest three principles as guidelines for designing a survey: randomization, overrepresentation and restriction. In the second part, we review the...

Université de Neuchâtel

Histogram-Based Interpolation of the Lorenz Curve and Gini Index for Grouped Data

Tillé, Yves ; Langel, Matti

In: The American Statistician, 2012, vol. 66, no. 4, p. 225-231

In grouped data, the estimation of the Lorenz curve without taking into account the within-class variability leads to an overestimation of the curve and an underestimation of the Gini index. We propose a new strictly convex estimator of the Lorenz curve derived from a linear interpolation-based approximation of the cumulative distribution function. Integrating the Lorenz curve, a correction can...

Université de Neuchâtel

New tests for departures from random behavior in spatial memory experiments

Tillé, Yves ; Newman, Jonathan A ; Healy, Susan D

In: Animal Learning & Behavior, 1996, vol. 24, no. 3, p. 327-340

We present statistical tests for departures from random expectation in spatial memory tasks. We consider two common protocols for spatial memory experiments. In the first one, subjects are allowed to search a fixed number of sites. In the second protocol, subjects are allowed to search until they achieve a fixed number of successes. In either of these protocols, the subjects involved may or may...

Université de Neuchâtel

Estimation de la précision d’évolutions dans les enquêtes répétées, application à l’enquête suisse sur la valeur ajoutée

Qualité, Lionel ; Tillé, Yves

In: Techniques d’enquête, 2008, vol. 34, no. 2, p. 193-201

Nous proposons une méthode pour estimer la variance des estimateurs des évolutions qui prend en compte toutes les composantes de ceux-ci : le plan de sondage, le traitement des non-réponses, le traitement des grosses entreprises, la corrélation de la non-réponse d’une vague à l’autre, l’effet dû à l’utilisation d’un panel, la robustification et le calage au moyen d’un...

Université de Neuchâtel

New methods to handle nonresponse in surveys

Hasler, Caren ; Tillé, Yves (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2015.

This document focuses on nonresponse in sample surveys. Mainly, methods to handle nonresponse in complex surveys are proposed. The first chapter of this document introduces concepts and notation of survey sampling and nonresponse. The second chapter proposes an algorithm for stratified balanced sampling for populations with large numbers of strata. The third chapter of this document presents a...

Université de Neuchâtel

Variance estimation of changes in repeated surveys and its application to the Swiss survey of value added

Qualité, Lionel ; Tillé, Yves

In: Survey Methodology, 2008, vol. 34, no. 2, p. 173-181

We propose a method for estimating the variance of estimators of changes over time, a method that takes account of all the components of these estimators: the sampling design, treatment of non-response, treatment of large companies, correlation of non- response from one wave to another, the effect of using a panel, robustification, and calibration using a ratio estimator. This method, which...

Université de Neuchâtel

Application of Fast SAS Macros for Balancing Samples to the Selection of Addresses

Chauvet, Guillaume ; Tillé, Yves

In: Case Studies in Business, Industry and Government Statistics (CSBIGS), 2007, vol. 1, no. 2, p. 173-182

This article introduces the method of balanced sampling and explains how to apply it to the selection of addresses in the context of the French census. SAS macros which perform the analysis are presented. The exposition is accessible to readers with at least an intermediate statistics level. Prior exposure to sampling ideas is useful but not strictly necessary..

Université de Neuchâtel

Dix années d’échantillonnage équilibré par la méthode du cube : une évaluation

Tillé, Yves

In: Techniques d’enquête, 2011, vol. 37, no. 2, p. 233-246

Le présent article propose un examen et une évaluation de l’échantillonnage équilibré par la méthode du cube. Il débute par une définition de la notion d’échantillon équilibré et d’échantillonnage équilibré, suivie par un court historique du concept d’équilibrage. Après un exposé succinct de la théorie de la méthode du cube, l’accent est mis sur les aspects...