This paper deals with the analysis of structural breaks in the context of fractionally integrated models. We assume that the break dates are unknown and that the different sub-samples possess different intercepts, slope coefficients and fractional orders of integration. The procedure is based on linear regression models using a grid of values for the fractional differencing parameters and least...

Entering a state of anxious anticipation triggers widespread changes across large-scale networks in the brain. The temporal aspects of this transition into an anxious state are poorly understood. To address this question, an instructed threat of shock paradigm was used while recording functional MRI in humans to measure how activation and functional connectivity change over time across the sali...

We examine the efficiency-based arguments for second-best optimal health insurance with multiple treatment goods and multiple time periods. Correlated shocks across health care goods and over time interact with complementarity and substitutability to affect optimal cost sharing. Health care goods that are substitutes or have positively correlated demand shocks should have lower optimal patient ...

This paper presents a new approach for the automatic assignment of document event-time periods. This approach consists of extracting temporal information from document texts, and translating it into temporal expressions of a formal time model. From these expressions, we are able to approximately calculate the event-time periods of documents. The obtained event-time periods can be useful for bot...

This paper addresses the problem of scheduling realtime dwells in multi-function phase array radar systems. To keep track of targets, a radar system must meet its timing and energy constraints. We propose a new task model for radar dwells to accurately characterize their timing parameters. We develop an algorithm of transforming every dwell task as a semi-period task so the dwell task can meet ...

Objectives Large, simple, pragmatic, low-risk, maintenance treatment trials may seem straightforward to design, run and analyse. However, if trial case record forms (CRFs) are completed infrequently, the reliability of patient recall over these long time-periods is questionable, especially when recording individual incidences and severity of toxicities of specific interest to the trial. It is e...