We discuss specification of regression models for using migration data to infer the living standards of different regions, and for observing how much of the standard of living is determined by economic opportunities versus non-pecuniary amenities. We estimate a regression using Canadian data from 1976-95, which results in rankings of the provinces with respect to overall living standards and am...

Amongst many fundamental factors affecting environmental protection, such as environmental policy, investment and technology, environmental investment has been the bottleneck for long constraining the development of environmental protection in China. Current situation in three aspects has highlighted the bottleneck problem. Firstly, China is still facing a severe environmental status. It takes ...

laparoscopic surgery is now an integral part of the operative repertoire. single-incision laparoscopic surgery (sils) is a new technique developed for performing operations without a visible scar. pneumoperitoneum, as a necessary precondition of laparoscopic procedures, represents the restriction of the surgeon's freedom of movement and can lead to rare but typical complications. the single inc...

hydatid cyst is a zoonotic disease that is common in the mediterranean region. thoracic wall, rib or extrapulmonary intrathoracic localization of the cysts is very rare. giant extrapulmonary intrathoracic hydatid cysts can lead to both diagnostic and treatment difficulties and can be confused with tumor. we present a case of a hydatid cyst with thoracic wall involvement mimicking tumor. we conf...

PURPOSE This article provides a historical overview of the emergence of assisted living in the United States over a 25-year period to identify goals and key concepts that underpinned the emerging form of care. DESIGN AND METHODS The method is historical analysis based on records and my own personal experiences in conceptualizing and implementing assisted living in Oregon and nationwide. RES...