According to domestic relevant essays and works on this crime , related discussions mainly concentrated on this crime ' s composition characteristic , the form of crime intention and its time of emerging , the asserting of the purpose of illegal possession , the distinction between contract swindling and civil disputation , etc . there is fewer discussions on the concept , the difference between swindling and fraud , the nature of the behavior that swindle intention produced while the effective contract is fulfilled , the evaluation and analysis of the clause of the crime , etc . the author studied related essays and works carefully , then combining the theory of the contract lav and criminal law , to discuss the concepts of this crime , the judicial confirmation of this crime , the evaluation and analysis of the clause of the crime , etc . aiming at casting a brick to attract a jade 从国内有关本罪研究的论文与专著来看，相关论述主要集中在本罪的构成特征，犯罪故意的形式与产生时间，非法占有目的的认定，合同诈骗与民事纠纷的区别等方面，而对本罪的概念，欺诈与诈骗的区别，在有效合同履行过程中产生犯意进而诈骗之行为如何定性，本罪条文评析等方面，尚探讨不多。笔者在较详尽地研读有关论文、专著的基础上，结合合同法理论与刑法理论，就合同诈骗罪的概念与特征、司法认定、条文评析等方面展开论述，旨在抛砖引玉。
First of all , this part sets up the information searching model of venture investment company ' s choosing projects under the condition of asymmetric information , then this part demonstrates the limitation of information searching and provides the thought of information risk prevention by contriving efficient contract . secondly , this part analyzes 3 information asymmetry in managers " market in venture capital investment , then provides some policy suggestion to develop the managers " market of our country . also , this part sets up a dual principal - agent model , and makes some conclusions by mathematical induction 首先建立了非对称信息条件下风险投资公司项目选择的信息搜索模型，论证了信息搜索的局限性，提出了通过有效合同设计的方案来防范信息风险的思路；其次，对我国风险投资的经理人市场的三大信息不对称进行了分析，提出了发展我国经理人市场的政策建议；再次，构建了风险投资运作过程中的双重委托代理模型，通过数理推导得出了相关结论。
Due to the protection to the reliance interests , the safety of transaction not only refers to ratify the conduct of transaction validation , secure the benefit of performance , but also refers to the safety of reliance interests in the process of signing a contract before the formation of contract 这是因为信赖利益损失并不是信赖合同有效而合同无效所致的损失。在构成要件上，信赖利益赔偿的成立与合同是否有效并无联系，信赖利益损失中的额外缔约费用并不能从有效合同的履行中得到补偿。
Whether they are valid or notmust be decided by courts or arbitration organs when disputing parties havedifferent opinions in terms of their nature ; but not anybody at any time hasentitled to sue for the invalidation of a contract ; some invalidation contractsbecome validation ones after the replacement of an invalidation law action byvalidation one , after agreement by the contract party or third party , owing tospecific provisions or beyond limitation 无效合同是一种事实状态，但合同利害关系人对合同效力认定不一致时，必须经由法院或仲裁机关确定后才无效；并非任何人在任何时候都能对合同请求无效；有的本来无效的合同在经过转换、承认、特别规定以及超过诉讼时效后，会成为有效合同。
