安徽应对刘易斯拐点的对策建议

劳动力供应由过剩向短缺转变、工资开始上涨的时点即＂刘易斯拐点＂。由于中国经济的持续发展,以及计划生育政策效应,青壮年劳动力供给已开始出现供不应求现象,工资普遍上涨,中国＂刘易斯拐点＂已经悄然到来。＂刘易斯拐点＂对于经济、社会发展、转型具有标志性意义,安徽是传统农业、劳动力大省,应抓住机遇,顺势而为,积极应对。     

Using Empirical Point Elasticities to Teach Tax Incidence

Using point elasticities rather than using either arc elasticities or slopes of demand and supply curves provides the best method for teaching students about the economic impacts of excise taxes. Not only does a point-elasticity approach simplify theoretical analysis of tax impacts, but it also allows instructors to take advantage of publicly available empirical estimates of demand and supply elasticities to show students how theoretical results can be applied to real-world tax policy issues. To illustrate these advantages, the authors use several available estimates of point elasticities of demand and supply of raw sugar to calculate the economic impacts of a recently proposed penny-per-pound tax on raw cane sugar grown in the Florida Everglades.     

原油降凝剂的研究进展

本文概述了原油降凝剂的发展概况、作用原理和近年来的发展趋势以及今后应重点解决的问题。     

激光点焊技术在通风槽板制造中的应用

本文主要介绍激光点焊技术在大型电机通风槽板加工过程中的应用,分析了激光点焊中主要加工参数对焊接质量的影响。并对现有通风槽板的几种加工工艺方法进行分析和比较。     

Putting the learning curve in context

In implementation of change, people learn new ways of doing things, develop new skills, and adopt new organizational routines. This paper applies learning curve theory to implementation by developing a system dynamics model that includes two extensions to classic learning curve theory. First, the model includes a required output level for the individual. Second, the model includes a budget constraint on time that forces a choice between an old and a new way to achieve the output. Doing work the new way builds experience, increasing productivity and thus favoring continued use of the new skill, but model analysis demonstrates that this reinforcing process works to favor the new skill only at relatively high levels of productivity. Otherwise, the same process is a vicious cycle, driving out the new skill. The model exhibits a mode of behavior in which learning begins and then stalls and another mode in which the new skill becomes the preferred one. The paper identifies the tipping point between these two modes and characterizes the transition problem: Learning by doing is a dynamic process, a transition from use of an old way to a new way that requires accumulating experience beyond a threshold.     

Forecasting the business cycle using survey data

Regular business survey data are published as percentages of firms predicting higher, equal or lower values of some reference variable. Time series of such percentages do not fit production data too well. Univariate models often produce forecasts which are just as accurarate. Still, surveys contain anticipative judgement which, when combined with univariate modeling and proper filtering, may produce a good indicator for business cycle turning points. The way survey data are transformed so as to fit statistics on production seems not to be of much importance. A case study of the Finnish forest industry is offered as an example.     

我国房地产业发展周期与拐点探析

我国房地产发展周期已到繁荣阶段的中后期，虽然不少地方的房价还在涨，但有的地方房价已开始大涨后的下降，这预示房地产发展周期的拐点即将出现，应引起政府决策层的高度重视，以未雨绸缪。     

道德教育应以“中间层次”人群作为切入点

道德教育既是理论问题 ,更是一个重大的实践问题 ,文章从道德教育理论与中国现实情况相结合上 ,力求以新的视角 ,提出进一步加强和改进道德教育的思路。文章分析道德教育必须从“中间层次”人群作为切入点这一新思路的理论依据和相应的措施。     

丁家屋子地区孔店组高凝油增产措施选层技术

文章通过对丁家屋子地区孔店组高凝油测试资料进行分析，将储层分为四类，并对每类储层的试油工艺及效果进行了分析，找到了增产措施选层原则。     

一类泛函脉冲微分方程周期正解的存在性

利用Krasnoselskii不动点定理,讨论一类带参数的泛函脉冲微分方程多个周期正解存在的充分条件,在f(x)和I_k(x) 均为非超线性和非次线性的条件下,得到该类微分方程多个周期正解存在的一些新结果。