Spatial Pricing Policies Reconsidered: Monopoly Performance and Location

This paper reexamines the welfare implications of three pricing regimes (mill, uniform, and discriminatory) for a monopoly. Assuming linear demand and constant marginal costs, I show that with the introduction of endogenous location choice, uniform delivered pricing may provide the highest social welfare when demands in different markets are sufficiently heterogeneous; whereas discriminatory pricing always dominates uniform pricing when demands in different markets are similar.     

贵州安顺鲍屯乡村水利工程农业景观保护的范例

2011年,联合国教科文组织亚太遗产保护委员会在泰国曼谷授予中国贵州安顺鲍屯明代水利工程保护项目亚太遗产保护“卓越奖”。这是亚太遗产保护的年度最高奖项,共有10个国家34个项目参与竞争。评委会对这一乡村水利工程保护项目的评价是：     

Sow One Seed, Gain One More Life

The meadow on the highland is as broad as an ocean, yet it is also as quiet as a painting, without the limitation of a frame. It seems more natural and lively than a painting. It is as simple as the clear eyes of a Tibetan sheep, reflecting the rippling green grass and the scent of the soil as carried by the breeze. This scent followed me all the way as I followed spring＇s progress across the highland and as we drove deeper into the wide prairie in the County of Hongyuan. A Tunnel Enclosure in Camouflaged Clothing On average, Hongyuan is more than 3600 meters above sea level and is mainly involved in animal husbandry. It is the only county largely inhabited by Tibetans in the Prefecture of Aba. There is a vast area （777,200 ha.） of lush native grassland, 91.8 percent of the whole county. ＂Tashi Delek, welcome my reporter＂ said Tsepudan, Chairman of the Karlama Village Committee in the Township Village of Achok in the County of Hongyuan. He greeted me with smiles. He looked tall and strong in his traditional Tibetan robe, with a large-screen cell phone at his waist. ＂What＇s the fence for＂ I asked in curiosity. Before me was a huge fenced paddock. ＂A tunnel enclosure, they helped us build it,＂ said Tsepudan, pointing towards our companions （Professor Li Jian, and Professor Tang Cheng from the Southwest University for Nationalities, as well as Mr. Liu Gang from the Sichuan Prairie Institute）. Made of steel, the tunnel enclosure is shaped in a hexagon, 10 meters long. At first sight, it seems to be without any technical content. Actually, it contains a certain delicacy in its awkwardness. It saves a lot of labor and time when it is used to give an injection or medicine, or shear sheep, weighs something, or transport yaks and sheep. The Southwest University for Nationalities, the Sichuan Prairie Institute and local herdsmen produced it together, including its design, site selection and construction. Eight national     

抗战前南京国民政府防空建设初探

1927年4月南京国民政府建立后,并无立即进行防空建设,直到九一八事变与一二八事变之后,才意识到防空建设的重要性,并开始加强该方面的建设。为此,南京国民政府不但创办防空学校、建立全国性的防空协会及在全国各大城市组织防空展览和举行防空演习等一系列加强防空宣传教育的措施,而且还完善防空设施,如组建防空监视哨以构建防空情报网、加强灯火管制与组建防空部队等,这些措施在一定程度上为抗战初期减少国力的损失与人员的伤亡做出了积极贡献,在我国防空建设史上具有十分重要的历史地位。     

遵义乡贤宦泽民述略

宦泽民第遵义名门、沙滩文化重要的学者宦懋庸之孙。从晚清留学日本,投身辛亥革命,参加护国运动,桑梓从教十余年。一生勇于奉献,尽职尽责,算得上是贵州一位有作为的乡贤,值得后世效法。