Software for Learning and for Doing Statistics

The community of statisticians and statistics educators should take responsibility for the evaluation and improvement of software quality from the perspective of education. The paper will develop a perspective, an ideal system of requirements to critically evaluate existing software and to produce future software more adequate both for learning and doing statistics in introductory courses. Different kinds of tools and microworlds are needed. After discussing general requirements for such programs, a prototypical ideal software system will be presented in detail. It will be illustrated how such a system could be used to construct learning environments and to support elementary data analysis with exploratory working style.     

Institutional design and the closure of public facilities in transition economies

As part of the reforms of their systems for financing and delivering health care, many transition economies, particularly in central and eastern Europe, have adopted national insurance funds that are institutionally separate from ministries of health. Most of these countries have also grappled with the problem of restructuring the delivery system, especially the need to reduce hospital capacity. Although improving the performance of medical care providers through a shift from passive budgeting to explicitly incentive mechanisms is important, why this change in financial relations between the government and providers could not be implemented simply by reforming the role of health ministries is not obvious. This paper presents an explicit rationale for the separation of powers between the regulator (the ministry of health) and the financing body (the insurance fund), based on the inability of a single agency to commit to closing hospitals. JEL classification: L51, P20, P35, I18.     

Robustness to the unavailability of data in block designs

We present general results for finding or boundingt _maxB , the maximum number of arbitrary whole blocks of observations which can be removed from a block design, and still leave all of the elementary treatment contrasts estimable. The block sizes may be larger than the number of treatments. The results are applied to BBDs, reinforced BIBDs and BBDs, BTIBDs, and a series of variance balanced incomplete block designs with two block sizes. Also given for most of these designs, are results fort _max, the maximum number of arbitrary, scattered observations that can become unavailable, and still leave all of the elementary treatment contrasts estimable.The work was undertaken while Dr. Whittinghill was visiting Ohio State University, and supported by a grant from the Natural Sciences Division, Colby College, Waterville, Maine.     

生态旅游的绿色设计研究——以杭州西湖西进为例

本文以杭州西湖西进为例,阐明了发展生态旅游的关键是进行旅游区及旅游设施的绿色设计,同时指明了生态旅游绿色设计的基本原理及方法。     

中国期权市场运作规则的制定与验证研究

笔者以郑商所期权核心规则制定和期权模拟测试结果为例进行分析。介绍中国期权市场运作研究项目背景,研究期权市场的重要功能、期权市场与期货市场关系,探讨中国期权上市的可行性以及如何进一步做好期权上市准备工作、加快上市步伐等实际运作问题。     

解析线在园林景观设计中的形式表达

线是园林景观设计中一个重要的视觉造型元素。就景观设计中线的涵义、形态视觉特性等方面进行论述,并通过应用实例来阐述景观设计中线的几种表达方式,不同"线"的造型要素在不同应用情况下产生的不同景观效果。     

新生代农民工参与养老保险约束条件及路径设计

新生代农民工作为一个庞大的社会群体进入城市,推动着中国工业化、城市化进程加快,他们有着强烈的市民化需求却因养老保险的缺失而严重受阻,不但有损新生代农民工切身利益,也不利于和谐社会构建。基于新生代农民工养老保险构建过程中所面临的各种约束,应以新生代农民工可持续就业为核心、以政府为主导、以土地流转为途径、以自身保障意识为前提的发展模式,确保新生代农民工养老效益得到有效保障。     

IOS移动平台互动绘本的设计

绘本随着计算机软硬件的发展和无线网络技术的进步,正由纸质图书形式向数字化屏式过渡,其自身可以根据故事的画面与技术手段相结合,从而产生新的绘本形态---互动绘本。在这种应用背景的推动下,指出纸质绘本的优缺点,调查分析IOS移动平台互动绘本发展的前景与优势,从研究互动绘本的设计特征着手,探讨互动绘本设计在数字技术支撑下的设计要素与设计方法,可对互动绘本的设计与发展有所借鉴,并实现其艺术价值与市场应用价值。     

Crowding-out effect of the current food stamp subsidy scheme

We construct a model to illustrate that the current food stamp subsidy scheme fails to achieve its stated aim due to the crowding-out effect. More specifically, if the household income is sufficiently low, only a corner solution exists, and a full subsidy is needed.     

浅谈路桥设计构思的一体化

提高公路的舒适性需要进行路桥一体化设计,减少、甚至消除路桥过渡段沉降速度不一致导致的问题,提高路桥可靠性和安全性。