Université de Neuchâtel

Modeling latent variables in economics and finance

Bluteau, Keven ; Ardia, David (Dir.) ; Boudt, Kris (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2019 ; 2758.

The subject of unobservable variables encompasses this thesis. These latent (i.e., unobservable) variables must be inferred using statistical models or observable proxies. The objectives of my doctoral thesis are to develop and test new statistical models to infer these variables and link them to the analysis and improvement of economic and financial decisions. In my first essay, I tackle...

Université de Neuchâtel

Essays on the globalization of firm ownership

Zhang, Xiqian ; Salva, Carolina (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017 ; 2671.

This dissertation is constituted of three distinct chapters. The first chapter seeks to resolve a recent debate on whether sovereign wealth funds(SWFs) have non-financial objectives and politically distort firm performance. I find that, once stake size is considered, previous belief that SWFs would affect firm performance should be reformulated. SWFs rarely seek an influential stake in listed...

Université de Neuchâtel

Energy service contracting : an economic perspective

Klinke, Sandra ; Farsi, Mehdi (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018 ; 2672.

Energy service contracting consists in the outsourcing of energy-related services to a contractor, an Energy Service Company (ESCO), through a long-term contract. This business model has been deemed, in the literature, a promising market-based instrument to foster the deployment of renewable energy and energy conservation projects. This thesis examines empirically the determinants of adoption of...

Université de Fribourg

Machine learning with screens for detecting bid-rigging cartels

Huber, Martin ; Imhof, David

(Working Papers SES ; 494)

We combine machine learning techniques with statistical screens computed from the distribution of bids in tenders within the Swiss construction sector to predict collusion through bid-rigging cartels. We assess the out of sample performance of this approach and find it to correctly classify more than 80% of the total of bidding processes as collusive or non-collusive. As the correct...

Université de Fribourg

Simple Statistical Screens to Detect Bid Rigging

Imhof, David

(Working Papers SES ; 484)

The paper applies simple statistical screens to a bid-rigging cartel in Switzerland, and shows how well the screens detect it by capturing the impact of collusion on the discrete distribution of the bids. In case of bid rigging, the support for the distribution of the bids decreases involving a lower variance, illustrated by the coefficient of variance and the kurtosis statistic. Furthermore,...

Université de Fribourg

Econometric tests to detect bid-rigging cartels: does it work?

Imhof, David

(Working Papers SES ; 483)

This paper tests how well the method proposed by Bajari and Ye (2003) performs to detect bidrigging cartels. In the case investigated in this paper, the bid-rigging cartel rigged all contracts during the collusive period, and all firms participated to the bid-rigging cartel. The two econometric tests constructed by Bajari and Ye (2003) produce a high number of false negative results: the tests do...

Institut de recherche et de documentation pédagogique (IRDP)

Documents informatifs et indicateurs de l'Espace romand de la formation : année 2015

Pagnossin, Elisabetta ; Matei, Alina ; Armi, Franca

(IRDP : Institut de recherche et de documentation pédagogique ; 16.1)

Le dossier IRDP – année 2015 a dix sections et trente-deux sous-sections. Après des informations générales sur le système éducatif romand, on trouve des informations sur les élèves de la scolarité obligatoire et des données sur l’environnement pédagogique et sur l’organisation scolaire. Le sixième chapitre est consacré aux informations sur les compétences et les évaluations,...

Haute école pédagogique du canton de Vaud

Facteurs de risque face à la réussite scolaire des élèves migrants : remise en question dans le contexte de la politique d'intégration de l'école secondaire I (scuola media) du canton du Tessin

Pancaldi, Giorgia ; Laffranchini Ngoenha, Moira (Dir.)

Mémoire de master : Haute école pédagogique du canton de Vaud, 2015 ; mp6417.

L’école secondaire I du Tessin est une école unique qui se propose, comme l'indique la Loi de l’école tessinoise de 1990, de corriger les écarts socioculturels et réduire les obstacles qui compromettent la formation des élèves. Depuis les années 1990, le public scolaire est devenu de plus en plus hétérogène du point de vue des nationalités, de la langue et de l’origine...

Université de Fribourg

Screening for bid-rigging - does it work?

Imhof, David ; Karagök, Yavuz ; Rutz, Samuel

(Working Papers SES ; 468)

This paper proposes a method to detect bid-rigging by applying mutually reinforcing screens to a road construction procurement data set from Switzerland in which no prior information about collusion was available. The screening method is particularly suited to deal with the problem of partial collusion, i.e. collusion which does not involve all firms and/or all contracts in a specific data set,...