The term “mid-term break” is frequently attributed to the half at schools—a short vacation season for students. However, as one of Irish poet Seamus Heaney’s poem, it represents a new period, characteristic transition from situation another. Through this autobiographical poem narrating his brother Christopher's death, Heaney presents moment which may happen anyone, far away emotions possible, w...

It has been suggested that existing estimates of the long-run impact of a surprise move in income may have a substantial upward bias due to the presence of a trend break in 1970s (1350s) and 1980s (1360s) gross domestic product (contained oil) data of Iran. This article shows that the statistical evidence does not warrant abandoning the no-trend-break null hypothesis at the 5% significance leve...

We consider the problem of modeling a long-memory time series using piecewise fractional autoregressive integrated moving average processes. The number as well as the locations of structural break points and the parameters of each regime are assumed to be unknown. A four-step procedure is proposed to find out the break points and to estimate the parameters of each regime. Its effectiveness is s...

This paper considers the problem of constructing confidence sets for the date of a single break in a linear time series regression. We establish analytically and by small sample simulation that the current standard method in econometrics for constructing such confidence intervals has a coverage rate far below nominal levels when breaks are of moderate magnitude. Given that breaks of moderate ma...

Recently, a laser scanner has been receiving more attention as a useful tool for real-time 3D data acquisition, and various applications such as city modelling, DTM generation and 3D modelling of cultural heritage were proposed. However, robust filtering for distinguish onand off-terrain points from point cloud 3D data collected by airborne laser scanner is still issues. In particular, filterin...