At last the influence of the current income distribution disparity of chinese inhabitants was analyzed , and the kaldor ' s model was revised . accordingly , the middle income could prevent the polarization and promote the development of economy were demonstrated by economical means 通常认为中等收入阶层在经济增长中具有防止两极分化、促进社会发展的稳定性作用，作者利用构建的新模型，首次用经济学原理剖析了这种稳定性作用的根源。
Secondly , this paper systematically analyzed the current status of cluster of private - run business at chongqing city , and the results showed that the formation of clusters was a reasonable consequence of the development of private - run businesses at chongqing city 其次,用集群理论和相关经济学原理对重庆民营企业集群现状进行了系统的分析,表明以集群形式发展是重庆民营企业的必然选择,并重点指出了当前重庆民营企业集群发展存在的问题。
Abstract : this paper applies economy principle to analyzing the principal - agent model between client and property management c ompany , the model is applied to putting forward three kinds of solutions con tributing to solving the problems in present expenses collection of propert y management company 文摘:运用经济学原理分析了物业管理公司与业主之间的委托-代理关系模型，并运用模型对目前物业管理收费中存在的问题提出了三种解决思路。
From a perspective of the destruction on mine environment and its harness problem from coal exploitation , this paper aims to set up and carries out the concept of scientific development , using the ecological economy principle and recycle economic theory to direct the synthetical development and utilization of coal 本文透视煤炭开发对矿山环境的破坏与治理问题，旨在树立和落实科学发展观，应用生态经济学原理和循环经济理念，指导煤炭综合开发利用。
In 1890 , alfred marshall has integrated fruits of economics research ever since adam smith into a masterpiece book principles of economics . his idea of value equilibrium based upon costs of production and marginal utility theories is still the central guiding principal in market resources allocation research 1890年，马歇尔对经济学产生以来，主要是亚当?斯密以来的经济学发展进行过一次综合，他的《经济学原理》一书，是古典经济学的集大成之作。
By analyzing the financing composition of smes , the article puts forward to the measures to solve the financing difficulty of smes , describes the economics theory of guarantee and analyzes the current difficulties of guarantee company and measures to solve these difficulties 本文通过对中小企业融资结构的分析，提出了解决中小企业融资难的方法和措施，阐述了信用担保的经济学原理，并结合四川省中小企业信用担保体系的建立，分析担保机构目前的困难和解决办法。
Based on research progress on economic value of ecosystem services , taking shenzhen for instance , the authors analyze the functions of ecosystem services such as conditioning climate , fixing carbon and releasing oxygen , preserving soil , keeping waterhead , purifying environment , and restraining noises . economic values of all the six kinds of ecological service functions are calculated 综述国内外生态系统服务功能价值评估相关研究进展，以深圳市为例，运用生态经济学原理与方法，阐释了生态系统调节气候固碳释氧保持土壤涵养水源净化环境和减弱噪声等生态服务功能，对其经济价值进行评估。
