Publications des institutions partenaires
Constrained Expectation-Maximization Algorithm for Stochastic Inertial Error Modeling: Study of Feasibility
Stochastic modeling is a challenging task for low-cost sensors which errors can have complex spectral structures. This makes the tuning process of the INS/GNSS Kalman filter often sensitive and diffcult. For example, first-order Gauss-Markov processes are very often used in inertial sensor models. But the estimation of their parameters is a non-trivial task if the error structure is...
Institution partenaire
English / 01/01/2011
Generalized Method of Wavelet Moments
This paper presents a new estimation method for the parameters of a model generating times series. Given some conditions on the form of the power spectral density associated to the process, it is possible to indirectly recover pa- rameter estimates from wavelet variances (WV) associated to the process. We propose an optimization criterion based on a standardized distance between the...
Institution partenaire
English / 01/01/2011
Statistical modelling of radio audience data: a parametric approach
In this thesis, we develop models to analyze zero-inflated truncated heavy-tailed dependent data to fit radio audience data in Switzerland. These models are able to explain, by means of covariates, both the probability of observing a positive outcome and the mean of the positive outcomes, which respectively correspond to the audience indicators of reach and of time spent listening....
Institution partenaire
English / 01/01/2011
Robust VIF Regression
The sophisticated and automated means of data collection used by an increasing number of institutions and companies leads to extremely large datasets. Subset selection in regression is essential when a huge number of covariates can potentially explain a response variable of interest. The recent statistical literature has seen an emergence of new selection methods that provide some...
Institution partenaire
English / 01/01/2011
Explaining grassland biomass - the contribution of biodiversity and climate depends on fertilisation and mowing frequency
Institution partenaire
English / 01/01/2011
Economic Aspects and Social Drivers of Land Degradation
Institution partenaire
English / 01/01/2011
Improving Modeling of MEMS-IMUs Operating in GNSS-denied Conditions
Stochastic modeling is a challenging task for lowcost inertial sensors whose errors can have complex spectral structures. This makes the tuning process of the INS/GNSS Kalman filter often sensitive and difficult. We are currently investigating two approaches for bounding the errors in the mechanization. The first is an improved modeling of stochastic errors through the superposition...
Institution partenaire
English / 01/01/2011
Acute appendicitis: prospective evaluation of a diagnostic algorithm integrating ultrasound and low-dose CT to reduce the need of standard CT.
To evaluate an algorithm integrating ultrasound and low-dose unenhanced CT with oral contrast medium (LDCT) in the assessment of acute appendicitis, to reduce the need of conventional CT.
Institution partenaire
English / 01/01/2011
Social Network Analysis and Qualitative Comparative Analysis: Their mutual benefit for the explanation of policy network structures
By switching the level of analysis and aggregating data from the micro-level of individual cases to the macro-level, quantitative data can be analysed within a more case-based approach. This paper presents such an approach in two steps: In a first step, it discusses the combination of Social Network Analysis (SNA) and Qualitative Comparative Analysis (QCA) in a sequential mixed-...
Institution partenaire
English / 01/01/2011
A New Measure of Tariff Preference Margins Adjusted for Import and Domestic Competition
This paper provides a new theoretically-derived measure of preference margins at the product level, that takes into account competition across exporters as well as competition with domestic producers on a given market. This indicator is derived for differentiated goods under imperfect competition, in a frame-work extended from Ottaviano, Tabuchi and Thisse (2002). We compute our...
Institution partenaire
English / 01/01/2011
Specialized organizations and ambidextrous clusters in the open innovation paradigm
By comparing Lucent Technologies and Cisco Systems over twenty years, one illustrates that a firm that outsources exploration through an Acquisition and Development (A&D) strategy of start-ups and exploitation specialization can be more innovative and competitive than an ambidextrous organization. The success of an A&D strategy depends on the embeddedness of the firm in the...
Institution partenaire
English / 01/01/2011
Time-varying risk premium in large cross-sectional equity datasets
Institution partenaire
English / 01/01/2010
Dining in the dark: the importance of visual cues for food consumption and satiety
How important are visual cues for determining satiation? To find out, 64 participants were served lunch in a “dark” restaurant where they ate in complete darkness. Half the participants unknowingly received considerably larger “super-size” portions which subsequently led them to eat 36% more food. Despite this difference, participants’ appetite for dessert and their subjective...
Institution partenaire
English / 01/01/2010
Can there ever be too many options? A meta‐analytic review of choice overload
The choice overload hypothesis states that an increase in the number of options to choose from may lead to adverse consequences such as a decrease in the motivation to choose or the satisfaction with the finally chosen option. A number of studies found strong instances of choice overload in the lab and in the field, but others found no such effects or found that more choices may...
Institution partenaire
English / 01/01/2010
Who opposes immigrants’ integration into the labor market ? The Swiss case
Institution partenaire
English / 01/01/2010
Explaining fiscal balances with a simultaneous equation model of revenue and expenditure: a case study of Swiss cantons using panel data
Institution partenaire
English / 01/01/2010
The Doha Round and Market Access for LDCs: Scenarios for the EU and US Markets
Least developed countries (LDCs) hoped that the DOHA round would bring them greater market access in the Organization for Economic Cooperation and Development countries than for non-LDCs. Using HS-6 tariff level data for the United States and the EU for 2004, this paper estimates that, once the erosion from preferential access into the EU to non-LDCs is taken into account, LDCs have...
Institution partenaire
English / 01/01/2010
Measures of export diversification
How export patterns vary across time and countries has become a subject of intense descriptive analysis in recent years. The originality of our work is to compute usual diversification indices using a very large and disaggregated dataset on exports. Export data is from UNCTAD’s COMTRADE database at the HS6 level (4’991 lines).
Institution partenaire
English / 01/01/2010
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