| Venture capitalists provide funding and resources to start-ups to help them succeed in the competitive marketplace.However,information asymmetry in venture capital often results in moral hazards,such as fraud,embezzlement of funds,and insider trading,which may lead to investment losses and project failure.In order to protect the interests of investors to the greatest extent,it is necessary for venture capitalists to establish an effective supervision mechanism to monitor the behavior and decision-making of entrepreneurs while investing in start-ups.Effective supervision mechanisms can help venture capitalists identify potential moral hazards in time and take measures to avoid agency losses.Additionally,it can assist enterprises in correcting improper behavior and decision-making,ensuring they are headed in the right direction for healthy long-term growth.This is of great significance for the healthy development and long-term stability of the venture capital market.This thesis focuses on a venture capital project involving a venture capitalist and a venture entrepreneur.Starting with a differential game model of venture capital,the speculative behavior of venture entrepreneurs and the supervision behavior of venture capitalists are quantified and integrated into the model.The optimal decision of the two parties is obtained under three situations: cooperation,without considering the supervision mechanism,and considering the supervision mechanism respectively.The value of the supervision mechanism in the entire process of venture capital operation is also discussed.Furthermore,this thesis extends the differential game model to a stochastic differential game model,combining stochastic analysis theory to consider the influence of random factors on the equilibrium results in practice.This extension makes the model and conclusions more applicable to real-world situations.Additionally,this thesis conducts a comparative analysis of the two models to explore whether the introduction of random factors has an impact on the previous conclusions.By solving the HJB equation and conducting numerical simulations,we find that:(1)There exists an optimal effort level for entrepreneurial entrepreneurs,as well as an optimal effort level,optimal supervision ratio and optimal comprehensive supervision punishment for venture capitalists;(2)The supervision mechanism can effectively prevent speculative behavior of entrepreneurs and encourage them to work harder.Venture capitalists also need to pay more efforts and costs to carry out supervision activities;(3)The supervision mechanism can significantly improve the long-term income of entrepreneurs;(4)When not accounting for random factors,the supervision mechanism can effectively improve the total return of venture capitalists.However,when taking into account random factors,the total return of venture capitalists may decrease;(5)Entrepreneurial speculation can damage the reputation and returns of the entire venture capital project.The introduction of a supervision mechanism can effectively address this issue. |