我国农民专业合作社发展的瓶颈问题与突破之策

本文从我国农民专业合作社的发展状况入手,深入分析了影响和制约它们发展壮大的几个瓶颈问题。在此基础上,从发展现代农业和建设新农村的要求出发,提出了农民专业合作社建立健全内部运作机制、提高产业化经营程度、缓解资金困难问题和加大政策支持的具体措施。     

企业响应科技专项政策的资源利用机制探析

政策资源利用机制是企业响应科技专项政策效果的关键环节,将政策响应和资源利用引入复杂适应系统进化过程中,重点分析了资源获取和利用的过程演化机制。基于复杂适应系统和多主体建模方法,依托Swarm仿真平台分析了企业响应科技专项政策的资源利用情况、响应过程中的瓶颈控制点和阶段性规律,指出企业技术创新组件的非关键部门剥离、政策资源集中配置和转化经验积累具有重要作用,最后,提出了相应的对策建议。     

桂林特色旅游产品开发的探讨

桂林是闻名遐迩的风景游览城市,也是国务院公布的第一批国家历史文化名城,旅游资源极为丰富。在经济快速发展的今天,如何尽快将桂林建设成为具有特色的国际旅游名城,是一个十分值得研究的问题。本文简述了桂林旅游资源的特色,分析了桂林特色旅游产品开发的现状及其存在的一些问题,并且提出了桂林特色旅游产品的开发构想。     

In search of advice for participants in matching markets which use the deferred-acceptance algorithm

Many centralized entry-level labor markets use the firm-proposing deferred-acceptance (DA) algorithm to compute the matching that is implemented among workers and firms. We propose a definition of the strategic options a worker faces in the DA-algorithm. Then we develop a theory to advise workers who distinguish between the firms from which they believe not to receive a proposal, the firms from which they might receive a proposal, and the firms from which they certainly receive a proposal. If a worker is not able to deduce which new proposals she receives after having rejected others, then it is not profitable for her to submit a list that reverses the true ranking of any two acceptable firms. Furthermore, it is not beneficial for her to include a firm in her submitted list that is unacceptable to her.     

On Limits of Uniquely Best Linear Estimators

In a general linear model, it is shown that all admissible linear estimators are limits of linear estimators that are uniquely best at some point in an extended parameter set. The principal result shows that a linear estimator that is uniquely best at a pointW ₂ among multiple linear estimators that are best at a pointW ₁ is the limit of uniquely best estimators at points approachingW ₁ along the line joiningW ₁ andW ₂. Research supported in part by U.S.A.F. Aerospace Research Laboratories under contract F33615-71-C-1463, summer 1973, and in part by Grant DMS-9104811 from the National Science Foundation.     

Security prices in a production economy with durable capital

Security prices and physical stocks of capital are determined jointly in a rational expectations economy as functions of a set of exogenous stochastic factors. Investors employ firm marginal productivity of capital to allocate savings across firms. Firm capital stocks adjust to exogenous shocks across many periods. Security price functions in period t are derived in the cases of constrained and unconstrained firm capital in t. The risk premia in security returns include two sets of terms. One set, corresponding to traditional asset pricing models, relates cash flows directly to the stochastic factors. The second set captures interfirm effects which arise because firm capital in each period t is durable.     

Possible explanations of no-synergy mergers and small firm effect by the Generalized Capital Asset Pricing Model

The Sharpe-Lintner Capital Asset Pricing Model (CAPM) and the General Capital Asset Pricing Model (GCAPM) suggested by Levy (1978), Merton (1987), and Markowitz (1989) are compared and analyzed. Under the GCAPM we obtain the following main results: 1) the value additivity principle breaks down, which explains mergers and acquisitions; 2) beyond a certain limit, the profit from additional merger is negative; and 3) in a GCAPM equilibrium, small firms earn an abnormal profit in comparison to what is predicted by the CAPM. These results, which are indeed observed in the market, are fully consistent with the GCAPM, but are in contradiction to the CAPM.     

常用信号处理芯片综述

本文对较常用的通用信号处理器件和专用信号处理器件系列，主要性能指标，特点及应用作了综合介绍。     

About some formalisms of interaction Phase transition models in economics?*

The aim of the present work is to scrutinise the economic use of phase transitions formalisms and to assess their relevance. The formal correspondence between the issue of micro-macro passage when agents are interacting and the physics problem of phase transition is first set out. The second section presents two formal tools likely to be associated with these problems and to exhibit the typical phenomena of phase transition. It is then possible to highlight the key points upon which the phase transition phenomena in these formal representations rely, and then to assess the relevance of their economic “counterparts” associated with these crucial characteristics. A more general appraisal of these formalisms for economics is finally sketched.     

日本倒产法制改革

日本倒产法制是对应近代经济结构在明治维新后确立的。随着经济的发展和变化,尤其是上世纪90年代的经济萧条,很多实体性和程序性制度规定暴露出陈旧、僵化、低效特征。经济复苏的要求成为推动日本倒产法制改革的契机和动力,日本从1999年开始实行倒产法制改革,其中包括创设民事再生制度,修改公司更生制度,实行新破产制度,引入新的特别清算制度。改革已经取得了较为明显的成效,但日本将倒产法制作为产业再生的工具,有可能触动倒产法自身存在的基础。因此对于日本倒产法制改革的长期效应仍需不断审视。