The aim of this paper is to analyze academic achievement of a cohort of students enrolled in 2001 at the Faculty of Economics of the University of Bologna by using a latent growth model for longitudinal data. The basic idea of this approach is that individuals differ in their growth over time...

The paper provides an overview of techniques and methods in time series modeling and decompositions with focus on business cycle, models for seasonality, the moving holiday component, the trading-day component and the irregular component.

In this paper we provide an overview of some trend models formulated for global and local estimation. Global trend models are based on the assumption that the trend or nonstationary mean of a time series can be approximated closely by simple functions of time over the entire span of the series....