Sökning: "Xavier de Luna"
Visar resultat 1 - 5 av 16 avhandlingar innehållade orden Xavier de Luna.
1. Prediction Methods for High Dimensional Data with Censored Covariates
Sammanfattning : While access to data steadily increases, not all data are straight-forward to use for prediction. Censored data are common in several industrial scenarios, and typically arise when there are some limitations to measuring equipment such as for instance concentration measuring equipment in chemistry or signal receivers in signal processing. LÄS MER
2. Active and healthy ageing in Europe : significance of social relationships
Sammanfattning : Background: Social relationships have important roles in achieving active and healthy ageing. Social relationships are dynamic across the life course. A myriad of contextual and individual (e.g. LÄS MER
3. Observed score equating with covariates
Sammanfattning : In test score equating the focus is on the problem of finding the relationship between the scales of different test forms. This can be done only if data are collected in such a way that the effect of differences in ability between groups taking different test forms can be separated from the effect of differences in test form difficulty. LÄS MER
4. Studying earnings trajectories as functional outcomes
Sammanfattning : In this thesis, we present methods for studying patterns of income accumulation over time using functional data analysis. This is made possible by the availability of large-scale longitudinal register data in Sweden. LÄS MER
5. Modeling financial volatility : A functional approach with applications to Swedish limit order book data
Sammanfattning : This thesis is designed to offer an approach to modeling volatility in the Swedish limit order market. Realized quadratic variation is used as an estimator of the integrated variance, which is a measure of the variability of a stochastic process in continuous time. LÄS MER