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The purpose of this paper is to provide theoretical justification for some existing methods for constructing confidence intervals for the sum of coefficients in autore-gressive models. We show that the methods of Stock (1991), Andrews (1993), and Hansen (1999) provide asymptotically valid confidence intervals, whereas the subsam-pling method of Romano and(More)
OBJECT The aim of this study was to examine the effect of postoperative external-beam radiation therapy (EBRT) on disease-specific survival in patients with nonbenign meningiomas. METHODS The Surveillance, Epidemiology, and End Results (SEER) database from 1988 to 2007 was queried for cases of resected Grades II (atypical) and III (malignant) meningioma.(More)
BACKGROUND Diffuse-type gastric cancer is observed in approximately one-third of gastric cancers, yet the optimal treatment remains controversial. In the recently published Intergroup 0116 trial, a subgroup analysis demonstrated a lack of a long-term survival benefit for adjuvant chemoradiation therapy among patients with diffuse-type gastric cancer. (More)
This paper suggests a new state space approach to analysis of stock return predictability. Acknowledging that expected returns and expected dividends are unobservable, the Kalman filter technique is used to extract them from the observed history of realized dividends and returns. This approach explicitly accounts for the variation in expected dividend(More)
Cranial irradiation is an effective treatment modality for both primary and metastatic brain tumors, yet it induces cognitive decline in a substantial number of patients. At present, there are no established methods for neuroprotection. Recent investigations have revealed a link between radiation-induced cognitive dysfunction and the loss of neural(More)
5 5 Some of today's most pressing and complex issues are rooted in the subversion of our environment. Establishing solutions to the looming threat of climate change, sea level rise, and the mass destruction of global ecosystem services begs the widespread assistance from policymakers and scientists to bring about action from all. The Natural Resources(More)
The purpose of this study was to assist with resource planning by examining the pattern of physician utilization of imaging procedures for lymphoma patients in a dedicated oncology hospital. The proportion of imaging tests ordered for routine follow up with no specific clinical indication was quantified, with specific attention to CT scans. A 3-month audit(More)
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