In this work we propose a modern statistical approach to the analysis and modeling of online auction data. Online auction data usually arrive in the form of a set of bids recorded over the duration of an auction. We propose the use of modern statistical methods, and especially functional data analysis and smoothing, that preserve the entire temporal dimension in place of currently used methods ...

In the literature two approaches of productivity analyses can be found, namely the neoclassical approach and the frontier approach. Neoclassical analysis weights inputs by value shares, a procedure that requires data on factor input shares or prices. This approach imputes productivity growth to factors, but cannot distinguish a movement towards the efficiency frontier and a movement of the latt...

Functional data analysis (FDA) — the analysis of data that can be considered a set of observed continuous functions — is an increasingly common class of statistical analysis. One of the most widely used FDA methods is the cluster analysis of functional data; however, little work has been done to compare the performance of clustering methods on functional data. In this paper a simulation study c...

In this paper, we investigate two stochastic perturbations of the metamorphosis equations of image analysis, in the geometrical context of the EulerPoincaré theory. In the metamorphosis of images, the Lie group of diffeomorphisms deforms a template image that is undergoing its own internal dynamics as it deforms. This type of deformation allows more freedom for image matching and has analogies ...

We develop a statistical framework, based on functional data analysis, for testing the hypothesis of the predictability of shapes of intraday price curves. We derive test statistics based on signs of the scores of the functional principal components. We establish its asymptotic properties under the null and alternative hypotheses, and demonstrate via simulations that it has excellent finite sam...

background: acute promyelocytic leukemia (apl) is a unique subtype of acute leukemia. apl is a curable disease; however, drug resistance, early mortality, disease relapse and treatment-related complications remain challenges in apl patient management. one issue underlying these challenges is that the molecular mechanisms of the disease are not sufficiently understood. materials and methods: in ...