发展县域经济促进农民增收

该文重点从调整经济结构、发展工业经济、特色经济、民营经济和创新体制等五个方面进行论述,试图探讨一条以科学发展观为指导的发展县域经济的新路.     

A variety-increasing view of the development of the semiconductor industry in Taiwan

The development of the semiconductor industry depends on its interactions with the environment. Developing countries face more constraints and the environmental interactions seem more complicated. The development process of the semiconductor industry could be better understood with regard to the interactions and social changes. This study proposes a variety-increasing viewpoint based on the concepts of variety increasing and internal learning to analyze the developmental experience of the semiconductor industry in Taiwan. The result shows that the development of Taiwanese semiconductor industry is a continuous variety-increasing process, which is achieved by searching and establishing successful associations in an increasingly wider and complex environment. Implications on the ongoing development of Taiwan's semiconductor industry and the development experiences of other East Asian countries are discussed.     

公有制内按生产要素分配实现形式探析

一般理论认为,按生产要素分配主要体现在非公有制领域和公有制领域内劳动者收入来源的多样性上.但事实上,随着我国劳动力市场的发展和完善,按生产要素分配在公有制领域内将有更大的作用空间.其具体实现形式之一,即为公有制范围内劳动收入由V+Vm构成,而且对企业利润(M)中分配后的剩余部分,仍可实行按生产要素分配,而后者是建立国有资产保值增值机制的一种新思路.     

Symmetry and order in the portfolio allocation problem

Summary. This research studies the role of multivariate distribution structures on random asset returns in determining the optimal allocation vector for an expected utility maximizer. All our conclusions pertain for the set of risk averters. By carefully disturbing symmetry in the distribution of the, possibly covarying, returns, we ascertain the ordinal structure of the optimized allocation vector. Rank order of allocations is also established when a permutation symmetric random vector is mapped into the returns vector through location and scale shifts. It is shown that increased dispersion in the vectors of location and scale parameters benefit, ex-ante, investors as does a decrease in the rank correlation coefficient between the location and scale parameter vectors. Revealed preference comparative static results are identified for the location and scale vectors of asset returns. For most issues addressed, we arrive at much stronger inferences when a safe asset is available. Received: August 8, 2000; revised version: January 8, 2001     

砼偏心受压构件折减系数计算公式的几个注解

根据弹性稳定理论,对当量弯矩折减系数Cm的计算公式的应用范围作了进一步说明,并确定了其应用范围.同时,考虑砼偏心受压构件的弹塑性性能,推导了新的公式,与原有的公式比较,具有同样的精确度,由于考虑了砼材料的变形模量,因此其结果更接近实际.     

Development Dynamics: Economic Integration and the Demographic Transition

This paper examines the influence of economic integration—widening of the trading area—on economic development and the demographic transition. Economies produce with different technologies depending on their scale. Greater integration between regions (greater extensive scale) is instrumental in changing rates of return, which generates an industrial revolution and provokes changes in child bearing behavior. The demographic transition follows from the mortality response to income and birth response to greater scale. The model is calibrated and simulated using historical data from Europe. Historical evidence is cited to support the idea that integration precedes the dramatic rise in economic growth rates.     

Monotonicity of Rank Statistics in some Non–parametric: Testing Problems

For some non–parametric testing problems (one–sided two–sample problem, k –sample trend problem, testing independence against positive dependence) a partial ordering, denoted by ≥, over the alternatives is defined. This partial ordering expresses the strength of the deviation from the null–hypothesis. All familiar rank tests turn out to become more powerful under "increasing" alternatives; that is, all familiar rank statistics preserve the ordering stochastically in samples whenever it is present between underlying distributions. As a tool, the sample equivalence of ≥ is introduced as a partial ordering over pairs of permutations. Functions, defined on pairs of permutations, which preserve this ordering are studied.     

Distinguishing external from internal scale effects: The case of public infrastructure

The recent applied production theory literature focusing on the economic performance of firms has increasingly recognized the importance of scale effects on costs and therefore efficiency. These scale effects may include short run returns due to fixity of privately demanded inputs (i.e., capital, long run internal returns to scale, and external factors affecting costs. Since these different types of scale effects can be thought of as shifts in and movements along cost curves, the different cost effects of such factors can be identified in a framework which explicitly takes them into account in the definition ofscale.In this article we formalize such a framework, and then use it to measure short run, long run (internal) and external scale effects from fixity of private capital, nonconstant returns to scale and public infrastructure. We then use these measures to identify the impacts of these different scale factors on productivity growth. The focus on public infrastructure as an important external scale factor is motivated by the current theoretical and policy interest in this issue; we show how a structural production theory model provides a rich basis for the analysis of the cost effects of infrastructure investment.     

庭院经济是我国21世纪农民增收的新亮点

当代庭院经济具有广泛的经济、生态、社会效益,是广大农民增产增收、摆脱贫困和走向富裕的重要途径。文章在分析了庭院经济发展的优势与劣势的基础上,提出了庭院经济的发展思路。     

从聚丙烯装置的高速建设看未来我国丙烯市场压力

近年来，随着我国国民经济的持续高速发展，我国聚丙烯市场消费量逐年较大幅度上升。为了满足国内对聚丙烯日益增长的需求，聚丙烯业界将投资高度集中在聚丙烯装置建设方面，分别采用独资、合资方式建设聚丙烯装置，国内已掀起新一轮聚丙烯建设高潮。在未来4～5年，我国将有8套世界级规模的聚丙烯装置投产，合计能力达到2．19～2．34Mt／a，聚丙烯装置的高速建设无疑对其原料丙烯的供应带来一定的压力。文章分析了丙烯行业状况，未来丙烯市场可能出现的供不应求趋势以及相应的解决方案。