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Dissertations / Theses on the topic 'CLUSTER VARIANCE'

Author: Grafiati

Published: 11 September 2023

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1

Akdemir, Deniz. "Components Of Response Variance For Cluster Samples." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1206044/index.pdf.

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Measures of data quality are important for the evaluation and improvement of survey design and procedures. A detailed investigation of the sources, magnitude and impact of errors is necessary to identify how survey design and procedures may be improved and how resources allocated more efficiently among various aspects of the survey operation. A major part of this thesis is devoted to the overview of statistical theory and methods for measuring the contribution of response variability to the overall error of a survey. A very common practice in surveys is to select groups (clusters) of elements

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2

You, Zhiying. "Power and sample size of cluster randomized trials." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2009r/you.pdf.

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Park, Misook. "Design and Analysis Methods for Cluster Randomized Trials with Pair-Matching on Baseline Outcome: Reduction of Treatment Effect Variance." VCU Scholars Compass, 2006. http://hdl.handle.net/10156/2195.

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4

Dunning, Allison. "Comparing Bootstrap and Jackknife Variance Estimation Methods for Area Under the ROC Curve Using One-Stage Cluster Survey Data." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1849.

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The purpose of this research is to examine the bootstrap and jackknife as methods for estimating the variance of the AUC from a study using a complex sampling design and to determine which characteristics of the sampling design effects this estimation. Data from a one-stage cluster sampling design of 10 clusters was examined. Factors included three true AUCs (.60, .75, and .90), three prevalence levels (50/50, 70/30, 90/10) (non-disease/disease), and finally three number of clusters sampled (2, 5, or 7). A simulated sample was constructed for each of the 27 combinations of AUC, prevalence

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5

Randriatsiferana, Rivo Sitraka A. "Optimisation énergétique des protocoles de communication des réseaux de capteurs sans fil." Thesis, La Réunion, 2014. http://www.theses.fr/2014LARE0019/document.

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Pour augmenter la durée de vie des réseaux de capteurs sans fil, une solution est d'améliorer l'efficacité énergétique des protocoles de communication. Le regroupement des nœuds du réseau de capteurs sans fil en cluster est l'une des meilleures méthodes. Cette thèse présente propose plusieurs améliorations en modifiant les paramètres du protocole de référence LEACH. Pour améliorer la distribution énergétique des "cluster-heads", nous proposons deux protocoles de clustering centralisés k-LEACH et sa version optimisée k-LEACH-VAR. Un algorithme distribué, appelé e-LEACH, est également proposé po

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Diaz, Acosta Beatriz. "Experiments in Image Segmentation for Automatic US License Plate Recognition." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9988.

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License plate recognition/identification (LPR/I) applies image processing and character recognition technology to identify vehicles by automatically reading their license plates. In the United States, however, each state has its own standard-issue plates, plus several optional styles, which are referred to as special license plates or varieties. There is a clear absence of standardization and multi-colored, complex backgrounds are becoming more frequent in license plates. Commercially available optical character recognition (OCR) systems generally fail when confronted with textured or poorly c

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Piana, Clause Fátima de Brum. "Regionalização para o cultivo do feijão no Rio Grande do Sul com base na interação genótipo x ambiente." Universidade Federal de Pelotas, 2009. http://repositorio.ufpel.edu.br/handle/ri/2081.

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Made available in DSpace on 2014-08-20T14:06:15Z (GMT). No. of bitstreams: 1 Tese_ Clause_Fatima_ Piana.pdf: 1906168 bytes, checksum: 6bfd8bec615dee869166bbd0c0269e0d (MD5) Previous issue date: 2009-03-13<br>In Brazil, common bean (Phaseolus vulgaris L.) is cultivated in a range of ecologically differentiated environments. For being a culture highly influenced by the environment variation, its average productivity in the Country is unstable and low. An origin of this variation of productivity is the genotype x environment interaction, which has been one of the largest impediments for o

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Sartorio, Simone Daniela. "Aplicações de técnicas de análise multivariada em experimentos agropecuários usando o software R." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-06082008-172655/.

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O uso das técnicas de análise multivariada está reservado aos grandes centros de pesquisa, µas grandes empresas e ao ambiente acad^emico. Essas técnicas s~ao muito interessantes porque utilizam simultaneamente todas as variáveis respostas na interpretação teórica do conjunto de dados, levando em conta as correlações existentes entre elas. Uma das principais barreiras para a utilização dessas técnicas é o seu desconhecimento pelos pesquisadores interessados na pesquisa quantitativa. A outra dificuldade é que a grande maioria de softwares que permitem esse tipo de análise (SAS, MINITAB, BMDP, ST

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9

Dimitrakopoulou, Vasiliki. "Bayesian variable selection in cluster analysis." Thesis, University of Kent, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.594195.

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Statistical analysis of data sets of high-dimensionality has met great interest over the past years, with great applications on disciplines such as medicine, nellascience, pattern recognition, image analysis and many others. The vast number of available variables though, contrary to the limited sample size, often mask the cluster structure of the data. It is often that some variables do not help in distinguishing the different clusters in the data; patterns over the samp•.l ed observations are, thus, usually confined to a small subset of variables. We are therefore interested in identifying th

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10

Rastelli, Riccardo, and Nial Friel. "Optimal Bayesian estimators for latent variable cluster models." Springer Nature, 2018. http://dx.doi.org/10.1007/s11222-017-9786-y.

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In cluster analysis interest lies in probabilistically capturing partitions of individuals, items or observations into groups, such that those belonging to the same group share similar attributes or relational profiles. Bayesian posterior samples for the latent allocation variables can be effectively obtained in a wide range of clustering models, including finite mixtures, infinite mixtures, hidden Markov models and block models for networks. However, due to the categorical nature of the clustering variables and the lack of scalable algorithms, summary tools that can interpret such samples ar

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11

McClelland, Robyn L. "Regression based variable clustering for data reduction /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/9611.

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12

Orr, Anton D. "Improving cluster analysis with automatic variable selection based on trees." Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/44639.

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Approved for public release; distribution is unlimited<br>Clustering is an algorithmic technique that aims to group similar objects together in order to give users better understanding of the underlying structure of their data. It can be thought of as a two-step process. The first step is to measure the distances among the objects to determine how dissimilar they are. The second, clustering, step takes the dissimilarity measurements and assigns each object to a cluster. We examine three distance measures proposed by Buttrey at the Joint Statistical Meeting in Seattle, August 2006 based on clas

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13

Olson, Christopher. "Entropy as a Criterion for Variable Reduction in Cluster Data." Thesis, North Dakota State University, 2012. https://hdl.handle.net/10365/26760.

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Entropy is a measure of the randomness of a system state. This quantity gives us a measure of uncertainty that is associated with each particular observation belonging to a specific cluster. We examine this property and its potential use in analyzing high dimension datasets. Entropy proves most interesting in identifying possible dimensions that do not contribute meaningful classification to the clusters present. We can remove the dimension(s) found which are the least important and generalize this idea to a procedure. After identifying all the dimensions that should be eliminated from the dat

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14

Call, Scott. "Long-Period Variable Stars in the Globular Cluster NGC 6553." Bowling Green State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626973295690519.

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15

Hodder, Philip Jeremy Crichton. "A search for faint variable stars in the globular cluster M71." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28830.

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A 67" x 104" area of the metal-rich globular cluster M71 was searched for variable stars using 73 CCD frames. Using mean B and V values a colour-magnitude diagram down to V ≈ 22 is constructed. Four variables were discovered, with two more stars classed as possible candidates for variability. Phase diagrams and real time light curves are presented for all variables. One variable blue straggler (or SX Phe star) has been discovered with a period of 0.d05181. Values for the mass depend on the pulsation mode assumed for this star - (0.90 ± 0.13)M. for the first overtone mode, and (1.57 ± 0.22)M. f

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Weldrake, David Thomas Fredrick, and weldrake@mpia-hd mpg de. "Giant Planets and Variable Stars in Globular Clusters." The Australian National University. Research School of Astronomy and Astrophysics, 2005. http://thesis.anu.edu.au./public/adt-ANU20050616.191315.

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Over the last decade, 135 extrasolar planets have been discovered, the vast majority found by ongoing radial velocity searches. Of the stars sampled in these searches, 1% have `Hot Jupiter' planets associated with them. Having masses equivalent to Jupiter yet orbital periods of only a few days, this new class of planet is clearly unlike anything in our Solar System.¶ Hot Jupiters present us with an intriguing prospect. If the orientation of the planetary orbit is close to edge-on, the planet will periodically transit across the face of its star, resulting in a small drop in brightness. This t

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17

Weldrake, David Thomas Frederick. "Giant planets and variable stars in globular clusters /." View thesis entry in Australian Digital Theses Program, 2005. http://thesis.anu.edu.au/public/adt-ANU20050616.191315/index.html.

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18

Smitka, Michael Thomas. "Analysis of the Halo Globular Cluster M30 and its Variable Stars." Bowling Green State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1182382804.

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19

Pellegrin, Kyle S. "Long Period Variable Stars in the Globular Cluster M5 (NGC 5904)." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1595605798891894.

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20

Cameli, Cinzia <1988&gt. "Investigation of genetic risk variants for nicotine dependence and cluster headache." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/8583/1/Cinzia_Cameli_PhD_Thesis.pdf.

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The main focus of my PhD has been the analysis of rare and common variants in genetic susceptibility to two complex traits: nicotine dependence (ND) and cluster headache (CH). Firstly, we conducted a genetic study to investigate the role of genetic variation at CHRNA7 and CHRFAM7A in smoking phenotypes, and to test the hypothesis that 7nAChR variation may modulate the efficacy of varenicline in smoking cessation. The study was performed on 408 regular tobacco smokers, recruited at smoking cessation centers, including 142 individuals treated with varenicline. We determined the CHRNA7 and CHRF

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21

Abdel-Rasoul, Mahmoud Hisham. "A Variance Estimator for Cohen’s Kappa under a Clustered Sampling Design." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1308329295.

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22

Xue, Jianhong. "What drives a knowledge-based industry to cluster? : a latent variable analysis /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1426116.

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23

Kager, Elisabeth. "Pulsation Properties of Long Period Variable Stars in Globular Cluster NGC 6553." Bowling Green State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1277148078.

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24

Cardona, Velasquez Gustavo Adolfo. "Properties of Bright Variable Stars in Unusual Metal Rich Cluster NGC 6388." Bowling Green State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1308577583.

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25

Al-Trad, Anas. "Optimized Composition of Parallel Components on a Linux Cluster." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-86204.

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We develop a novel framework for optimized composition of explicitly parallel software components with different implementation variants given the problem size, data distribution scheme and processor group size on a Linux cluster. We consider two approaches (or two cases of the framework). In the first approach, dispatch tables are built using measurement data obtained offline by executions for some (sample) points in the ranges of the context properties. Inter-/extrapolation is then used to do actual variant-selection for a given execution context at run-time. In the second approach, a cost

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26

Abbas, Mohamad. "A search for Long-Period Variable Stars in the Globular Cluster NGC 6496." Bowling Green State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1308597257.

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27

Husband, Paul W. Jr. "Identification and Characterization of Long Period Variable Stars in the Globular Cluster M69." Bowling Green State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1499418711065308.

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28

Drury, Jason Andrew. "Observing variable stars and open clusters in the nominal Kepler superstamps." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/24143.

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Asteroseismology, the study of stellar interiors by measuring changes in the brightness of a star, has taken off over the last decade thanks to the unprecedented quantity and quality of photometric data from space telescopes such as Kepler and CoRoT. Open clusters are particularly important, providing ideal targets for understanding stellar evolution through ensemble analyses. These stars are believed to have common ages and metallicities, constraining the parameters affecting their evolution mainly to their mass. This thesis presents an analysis of the open cluster members and the surroundin

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29

Ibberson, Mark Robert. "Genomic organisation and polymorphism of the human T cell receptor variable alpha gene cluster." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321749.

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30

Lipkovich, Ilya A. "Bayesian Model Averaging and Variable Selection in Multivariate Ecological Models." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/11045.

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Bayesian Model Averaging (BMA) is a new area in modern applied statistics that provides data analysts with an efficient tool for discovering promising models and obtaining esti-mates of their posterior probabilities via Markov chain Monte Carlo (MCMC). These probabilities can be further used as weights for model averaged predictions and estimates of the parameters of interest. As a result, variance components due to model selection are estimated and accounted for, contrary to the practice of conventional data analysis (such as, for example, stepwise model selection). In addition, variable acti

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31

De, Marchi Fabrizio. "Variable stars and planetary transit search in super metal-rich open clusters." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3427100.

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This PhD thesis presents the analysis of a large sample of photometric data relative to the super metal-rich open clusters NGC6791 and NGC6253. The main goal of the surveys was the search for extrasolar planets using the transits method. I contributed to the extrasolar planet search by making numerical simulations in order to estimate the number of expected transiting planets. Moreover I analyzed the entire sample of light curves in order to find variable stars. I discovered 260 new variable stars in the field of NGC6791 and 597 in the field of NGC6253. The classification of all va

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Aljassim, Mohammad A. "A 6-Year Study of Long Period Variable Stars in the Globular Cluster NGC 6388." Bowling Green State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1499442952467274.

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33

Machin, Graham. "Cataclysmic variables in globular clusters and low mass X-ray binaries." Thesis, University of Oxford, 1990. http://ora.ox.ac.uk/objects/uuid:9cddbf39-034d-4d33-ad98-eecbe9bd60a7.

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34

Jacunov, Vít. "Využití vícekriteriálního hodnocení variant pro obnovu (zajištění) serverové infrastruktury ve vybraném podniku." Master's thesis, Vysoká škola ekonomická v Praze, 2016. http://www.nusl.cz/ntk/nusl-203820.

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The aim of this master's thesis is to select a suitable option to replace outdated hardware equipment of the company RR Donnelley Prague s.r.o.. In the theoretical part, terms 'virtualization', 'cloud' and their models are explained. Next, RR Donnelley Prague is described and the current situation in terms of hardware infrastructure and outsourced services is analysed. The practical part contains a recommendation of possible solutions of the situation described and, particularly, a selection of criteria assessed and a multi-criteria evaluation of proposed solutions. To estimate weights of the

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35

Dean, Nema. "Variable selection and other extensions of the mixture model clustering framework /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/8943.

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36

Asvany, Oskar. "Experiments with Ions and Clusters in a variable temperature 22-pole ion trap." Doctoral thesis, Universitätsbibliothek Chemnitz, 2004. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200400785.

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In this work, 22-pole ion trap machines have been applied to investigate protonated water clusters H+(H2O)n (n=4..10) and ionic hydrocarbons CHn+ (n=2..5) at low temperatures. Protonated water clusters H+(H2O)n play an important role in atmospheric chemistry and in interstellar space. The Taipei 22-pole ion trap machine has been applied to kinetic and spectroscopic investigations of these clusters produced from a supersonic expansion in a corona discharge source. Using low-pressure He buffer gas for collisional thermalization, refrigeration of the ion trap by liquid nitrogen allows a good cont

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Barry, Amanda Nell. "Spectroscopic studies of the human copper chaperone for superoxide dismutase : probing the active cluster with selenocysteine variants." Full text open access at:, 2007. http://content.ohsu.edu/u?/etd,258.

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38

Colman, Isabel Lily. "Pixels, photometry, and population studies: variable stars across four years of Kepler data." Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/22429.

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In this thesis, we focus on studies of variable stars across four years of data from NASA's Kepler mission. We present an analysis of oscillating red giants from which exhibit anomalous peaks in their amplitude spectra. We use close analysis of Kepler pixel data to confirm the source of these anomalous peaks. By analysing the distribution of the population across the Kepler field of view, we find that we are observing two populations, of contamination by a line-of-sight background or foreground binary system, and of physical associations in potential triple systems. Using similar population an

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Peng, Wei. "Improving Nitrogen Management in Corn- Wheat-Soybean Rotations Using Site Specific Management in Eastern Virginia." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/29485.

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Nitrogen (N) is a key nutrient input to crops and one of the major pollutants to the environment from agriculture in the United States. Recent developments in site-specific management (SSM) technology have the potential to reduce both N overapplication and underapplication and increase farmers' net returns. In Virginia, due to the high variability of within-field yield-limiting factors such as soil physical properties and fertility, the adoption of SSM is hindered by high grid﷓sampling cost. Many Virginia corn-wheat-soybean farms have practiced generating yield maps using yield monitors

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40

Aigner, Johanna 1981. "Genetical, structural and functional characterization of the human BTNL gene cluster." Doctoral thesis, Universitat Pompeu Fabra, 2013. http://hdl.handle.net/10803/127222.

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La família B7 de proteïnes és àmpliament reconeguda per jugar un paper important en els processos inflamatoris mitjançant l'alteració de la capacitat de resposta de les cèl•lules T. La unió d’aquestes proteïnes als seus receptors situats a la superfície de cèl•lules T pot promoure (per exemple, B7-1, B7-2, ICOS- L) o inhibir (per exemple, PD-L1, PD-L2, B7-H3, B7x) l'activació, la proliferació, la maduració i la producció de citoquines en cèl•lules T . A més, s’ha identificat l’expressió de diversos membres d’aquesta família de proteïnes tant en diferents tipus de tumors com en el microambient

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Hillwig, Todd C. "Analysis of the radial profile emissivity of accretion disks in cataclysmic variables." Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/941346.

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42

Lamertz, Larissa [Verfasser], and Jürgen [Gutachter] Scheller. "Klassisches, trans- und cluster-signaling durch HIL-6 und membrangebundene HIL-6 (mbHIL-6) Varianten und Identifizierung von neuen konstitutiven gp130 Varianten / Larissa Lamertz ; Gutachter: Jürgen Scheller." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2019. http://d-nb.info/1176806807/34.

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Milne, Peter. "The Variable Pronunciations of Word-final Consonant Clusters in a Force Aligned Corpus of Spoken French." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31139.

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This thesis project examined both schwa insertion and simplification following word-final consonant clusters in a large corpus of spoken French. Two main research questions were addressed. Can a system of forced alignment reliably reproduce pronunciation judgements that closely match those of a human researcher? How do variables, such as speech style, following context, motivation for simplification and speech rate, affect the variable pronunciations of word-final consonant clusters? This project describes the creation and testing of a novel system of forced alignment capable of segmenting rec

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Figuera, Jaimes Roberto Jose. "High-precision time-domain astrophysics in crowded star-fields with ground based telescopes : globular clusters and the mitigation of the atmospheric turbulence." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/13673.

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We carried out a three year (2013-2015) observational campaign at the Danish 1.54-m Telescope at the ESO observatory at La Silla in Chile in which we obtained ~1000 astronomical images in the field of 11 Galactic globular clusters. The selection of these stellar systems was focused mainly on the visibility of the targets and their relevant physical properties available in the catalogues, among them were considered the density, variable stars known, colour-magnitude diagrams, and luminosity. The telescope was equipped with an electron-multiplying CCD (EMCCD) with the aim of taking very short ex

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Johnson, Jay. "Identification of National Survey of Student Engagement (NSSE) socialization variable clusters that predict private midwestern college persistence." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5513.

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Thesis (Ed. D.)--University of Missouri-Columbia, 2008.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on July 27, 2009) Includes bibliographical references.

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Corradin, Olivia G. "Impact of DNA Variants in the Regulatory Circuitry of Gene Expression inHuman Disease." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1427988486.

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47

Gomes, Kátia Regina Maruyama. "Padrão de expressão gênica e localização tecidual no rato de um novo membro do Cluster gênico da enzima conversora da angiotensina I: variante-4." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/5/5131/tde-28012009-162314/.

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O sistema renina-angiotensina (SRA) é de fundamental importância para a manutenção da homeostasia cardiovascular. A enzima conversora de angiotensina I (ECA) é um elemento crítico na cascata de ativação das diversas substâncias ativas do SRA. Evidências obtidas em nosso laboratório por análise de genômica comparativa e confirmadas através de clonagem de segmentos de cDNA sugerem que esta família de proteínas está incompleta. Nossos dados apontam para existência de duas novas isoformas da ECA, que aqui denominaremos Variante-3 (Var-3) e Variante-4 (Var-4), localizadas no mesmo locus da ECA. Nes

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48

Azevedo, Bárbara Brzezinski. "Agrupamento de trabalhadores com perfis semelhantes de aprendizado utilizando técnicas multivariadas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/96638.

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A manufatura de produtos customizados resulta em variedade de modelos, redução no tamanho de lotes e alternância frequente de tarefas executadas por trabalhadores. Neste contexto, tarefas manuais são especialmente afetadas por conta do processo de adaptação do trabalhador a novos modelos de produtos. Este processo de aprendizado pode ocorrer de maneira distinta dentro de um grupo de trabalhadores. Assim, busca-se o agrupamento dos trabalhadores com perfis similares de aprendizado, monitorando a formação de gargalos em linhas de produção constituídas por dissimilaridades de aprendizado em proce

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Gay, Emilie. "Détection d'agrégats spatiaux dans le cas d'une variable continue : application à un indicateur de l'infection mammaire chez les bovins." Clermont-Ferrand 1, 2006. http://www.theses.fr/2006CLF1MM03.

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La détection des agrégats est une problématique d'importance en épidémiologie. Les méthodes de détection d'agrégats ont essentiellement été développées pour des maladies mesurées par des variables dichotomiques (cas/témoins). Or, dans le cas des infections mammaires des bovins, la maladie est évaluée par le score cellulaire, variable continue qui est une expression de la numération leucocytaire du lait. En conséquence, l'objectif de la thèse a consisté à développer des méthodes de détection d'agrégats spatiaux adaptées aux variables continues, afin d'analyser la répartition spatiale du score c

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ANGINO, SIRIA. "The importance of being clustered." Doctoral thesis, Luiss Guido Carli, 2017. http://hdl.handle.net/11385/201133.

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(I A Few-Cluster-Robust Test for Weak Instruments) - ABSTRACT - In the usual IV regression models, the quality of estimation and inference dra- matically depends on the relevance of the set of instruments. To test such condition, most empiricists rely on the first-stage F-statistic as suggested by Stock and Yogo (2005a). However, this method is not valid for clustered data, especially when there are few clusters. Recently, weak instrument-robust methods for inference have been proposed, but none of them deals with the latter case. In this paper, we propose a simple method to perform inf

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