顺酐国内外生产现状与发展趋势

世界顺酐工业正由苯法合成向正丁烷法合成转变，正丁烷法的生产能力已占顺酐总生产能力的80%，我国顺酐消费需求发展迅速，生产工艺仍以苯法为主，我国应立足于苯法生产，并做好向正丁烷法转变的技术准备，不断改进工艺淘汰小规模不经济顺酐装置，增强竞争能力。     

The Consumer Life Cycle

The field of consumer education needs conceptual frameworks to organize the growing body of existing knowledge and to point to needed research. The use of the familiar life cycle variable for this purpose is proposed. Generalizations, based upon a review of the literature, are offered about the characteristics, typical product and service purchases, marketplace concepts and knowledge, marketplace skills, typical marketplace problems and level of resources of different life cycle stage categories.     

西海岸楼市的“三级跳”

在房地产界有句名言：＂轮子带动房子。＂这里的＂轮子＂指的就是交通,当一个地方的交通条件变得通畅无阻时,房价就会随之上涨。如果我们回顾一下西海岸房地产的发展状况,就会发现,随着胶州湾隧道开工、贯通和今年上半年的即将通车,西海岸楼市已经和即将完成＂三级跳＂。     

小商品市场发展的国际依托、学术论争与战略操作:浙江证据

浙江省义乌市国际贸易综合改革试点总体方案(以下简称义乌试点)已获国务院批复,义乌试点必须充分发挥义乌小商品批发市场在全球分工协作体系中的独特作用。在探索现代流通新方式方面,大胆探索,实现体制机制的创新与突破,为我国加快转变外贸发展方式,形成经济全球化条件下参与国际经济合作与竞争的新优势提供新动力。     

Variety,Globalization, and Social Efficiency

The standard formal presentation of the Dixit‐Stiglitz‐Krugman (DSK) model of monopolistic competition with a constant‐elasticity‐of‐substitution (CES) utility function supposes a sufficient number of firms so that the elasticity of demand facing each variety is approximated by a constant elasticity of substitution. Such a formulation forces economies of scale to be frozen so that firm size never changes. We use a Bertrand‐Nash interpretation of the equilibrium that allows the elasticity of demand facing each variety to depend on the number of varieties, thus allowing the gains from globalization to reflect both the increase in variety and the exploitation of economies of scale. We also develop a precise expression for per capita real income with any number of sectors and examine the age‐old question of the socially optimal number of varieties.     

Lessons from My School

This article presents analyses of the National Assessment Program – Literacy and Numeracy (NAPLAN) data and data on other indicators that are made available through the My School website. There are large differences across states and types of schools (independent, Catholic and government) in the Year 3 NAPLAN outcomes, though the differences across states tend to diminish as outcomes for later years of study are examined. Some schools are shown to consistently have academic outcomes better than their characteristics would otherwise indicate; conversely, other schools are shown to consistently have academic outcomes below the levels their characteristics would otherwise indicate. Few of these differences are statistically significant.