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Université de Neuchâtel

Imputation of income variables in a survey context and estimation of variance for indicators of poverty and social exclusion

Graf, Eric ; Tillé, Yves (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2014 ; 2440.

This Phd thesis proposes to develop a method of imputation for income variables allowing direct analysis of the distribution of such data, particularly the estimation of complex statistics such as indicators for poverty and social exclusion as well as the estimation of their precision. In an introduction chapter we present the Swiss Survey on Income and Living Conditions (SILC) which we...

Université de Neuchâtel

Firm value and risk management in credit agreements

Marami, Ali ; Dubois, Michel (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2014 ; 2441.

In this dissertation, I analyze the proxies used in literature as the determinants of firm value to identify the core variables in modeling firm value. Using these variables, I evaluate the impact of interest rate derivatives on firm value. More specifically, I find that interest rate derivatives imposed in credit agreements has a positive impact on firm value in contrast to those used...

Université de Neuchâtel

Standardising Visual Control Devices for Tsetse Flies : Central and West African Species Glossina palpalis palpalis

Kaba, Dramane ; Zacarie, Tusevo ; M'Pondi, Alexis Makumyaviri ; Njiokou, Flobert ; Bosson-Vanga, Henriette ; Kröber, Thomas ; McMullin, Andrew ; Mihok, Steve ; Guerin, Patrick M

In: PLoS Neglected Tropical Diseases, 2014, vol. 8, no. 1, p. e2601

Background: Glossina palpalis palpalis (G. p. palpalis) is one of the principal vectors of sleeping sickness and nagana in Africa with a geographical range stretching from Liberia in West Africa to Angola in Central Africa. It inhabits tropical rain forest but has also adapted to urban settlements. We set out to standardize a long-lasting, practical and cost-effective visually attractive...

Université de Neuchâtel

Respect du délai en cas de recours mal adressé

Bohnet, François

In:, 2015, no. Janvier, p. 1-4

Université de Neuchâtel

Parasitoid recruitment to the globally invasive chestnut gall wasp Dryocosmus kuriphilus

Aebi Alexandre ; Schönrogge, Karsten ; Melika, George ; Alma, Alberto ; Bosio, Giovanni ; Quacchia, Ambra ; Picciau, Luca ; Abe, Yoshihisa ; Moriya, Seichii ; Yara, Kaori ; Stone, Graham N

In: Galling Arthropods and Their Associates: Ecology and Evolution, 2006, p. 103-121

The chestnut gall wasp Dryocosmus kuriphilus is a global pest of chestnut (Castanea). Established as a pest in the mid 20th century in Japan, Korea and the USA, this species has now reached Europe. Successful deployment of a biocontrol agent, Torymus sinensis, in Japan has led to its early release in Italy. Here we provide the first overview of the natural enemies associated...

Université de Neuchâtel

Morphological and Molecular Diversification of Asian Endemic Difflugia tuberspinifera (Amoebozoa, Arcellinida) : A Case of Fast Morphological Evolution in Protists?

Gomaa, Fatma ; Yang, Jun ; Mitchell, Edward A.D ; Zhang, Wen-Jing ; Yu, Zheng ; Todorov, Milcho ; Lara, Enrique

In: Protist, 2015, vol. 166, no. 1, p. 122-130

Planktonic arcellinid testate amoebae exhibit a broad-range of morphological variability but it is currently unclear to what extent this variability represents phenotypic plasticity or if it is genetically determined. We investigated the morphology and phylogenetic relationships of three endemic east-asian Difflugia taxa 1) the vase-shaped D. mulanensis, 2) and a spinose and a...

Université de Neuchâtel

The role of the bacterial community in the nutritional ecology of the bulb mite Rhizoglyphus robini (Acari: Astigmata: Acaridae)

Zindel, Renate ; Ofek, Maya ; Minz, Dror ; Palevsky, Eric ; Zchori-Fein, Einat ; Aebi, Alexandre

In: The FASEB Journal, 2013, vol. 27, no. 4, p. 1488-1497

The biology of many arthropods can only be understood when their associated microbiome is considered. The nutritional requirements of the bulb mite Rhizoglyphus robini Claparede (Acari: Astigmata: Acaridae) in the laboratory have been shown to be very easily satisfied, and in the field the mites prefer fungus-infected over uninfected plants. To test whether symbiotic bacteria facilitate the...

Université de Neuchâtel

Arthropod symbioses : a neglected parameter in pest- and disease-control programmes

Zindel, Renate ; Gottlieb, Yuval ; Aebi, Alexandre

In: Journal of Applied Ecology, 2011, vol. 48, no. 4, p. 864–872

1. Arthropods are important players in biological control as pests, control agents and transmitters of invertebrate diseases. Arthropods are frequently infected with one or several micro-organisms, serving as micro-ecosystems in which multiple interactions can take place. These micro-organisms include disease agents and symbiotic micro-organisms. The latter are usually vertically...