This paper explores the existence of 3 equilibria for symmetric 2-individual 2-good CES/LES pure exchange economies. For certain parameterizations in the economies, we show analytically that there are no more than 3 e...This paper explores the existence of 3 equilibria for symmetric 2-individual 2-good CES/LES pure exchange economies. For certain parameterizations in the economies, we show analytically that there are no more than 3 equilibria. We generalize our analytical results of existence of 3 equilibria for a wide range of parameterizations. Then we provide examples of 3 equilibria and parameter zones of 3 equilibria for CES and CES/LES economies.展开更多
Primitive neuroectodermal tumors （PNETs）, derived from the primitive neural crest, are highly malignant and mainly exist in the central nervous system （CNS）, chest wall, lower extremities, trunk, kidney, and orbit...Primitive neuroectodermal tumors （PNETs）, derived from the primitive neural crest, are highly malignant and mainly exist in the central nervous system （CNS）, chest wall, lower extremities, trunk, kidney, and orbit but rarely in the spine. Though multidisciplinary treatments have been well established as the standard therapy for intracranial PNETs, little is known about the optimal treatment strategy and therapeutic results for intraspinal PNETs. The following report illustrates the operative and non-operative management of an extradural PNET at the level of L5 in a young girl.展开更多
基金Supported by National Social Science Foundation of China 2007(07AJL002)National Natural Science Foundation of China(70825003, 70972001)
文摘This paper explores the existence of 3 equilibria for symmetric 2-individual 2-good CES/LES pure exchange economies. For certain parameterizations in the economies, we show analytically that there are no more than 3 equilibria. We generalize our analytical results of existence of 3 equilibria for a wide range of parameterizations. Then we provide examples of 3 equilibria and parameter zones of 3 equilibria for CES and CES/LES economies.
文摘Primitive neuroectodermal tumors （PNETs）, derived from the primitive neural crest, are highly malignant and mainly exist in the central nervous system （CNS）, chest wall, lower extremities, trunk, kidney, and orbit but rarely in the spine. Though multidisciplinary treatments have been well established as the standard therapy for intracranial PNETs, little is known about the optimal treatment strategy and therapeutic results for intraspinal PNETs. The following report illustrates the operative and non-operative management of an extradural PNET at the level of L5 in a young girl.
