学术交流信息如下：

主讲人一：张恒国

题目：Study on the Dynamic Development of Advanced Digital Technology

摘要：To study advanced digital technology (ADT), this research constructs a multilayer heterogeneous evolutionary game network. The behaviour of heterogeneous enterprises is dynamically described by differential equations on a scale-free network, and an enterprise learning network was established. Heterogeneous consumer behaviours were dynamically described by differential equations on the small-world network, and a consumer contagion network and threshold network were established. In the network, consumer choice behaviour affects market demand, market demand affects enterprise profit, and enterprise profit affects enterprise game behaviour. Government policies affect both consumer and enterprise behaviour. The evolutionary game mechanism is formed in such a cycle among the enterprise network, the consumer network and the government policy, which jointly affects the dynamic diffusion of ADT. The simulation results show that subsidy policy promotes technology diffusion more significantly than tax policy before consumer behaviour stabilizes. After consumer behaviour stabilized, both tax and subsidy policies significantly promoted technology diffusion.

主讲人二：张进峰

题目： 区域协调发展、财政金融政策与贫困地区农民增收

摘要：随着区域协调发展战略的推进，中国已完成脱贫攻坚的阶段性目标，取得了国家级贫困县全部摘帽的成就。这期间，扶贫政策经历了诸多变化，贫困地区农民收入也有了大幅提高。随之而来的问题是，财政金融政策在贫困地区农民增收过程中是否起到了预期的作用？本文通过构建空间杜宾模型系统分析了全国648个贫困县2008年~2017年财政政策和金融政策对农民收入的影响，并讨论了区域和政策异质性。研究发现，在整个样本期内，贫困地区农民收入在县域层面存在正的空间相关性；财政政策和金融政策对贫困县农民收入具有积极的促进作用，而且在农民增收过程中均有正向的空间溢出效应。异质性分析结果表明，财政政策的影响力度呈现出显著的区域特征，而金融政策对农民增收的影响在精准扶贫时期更加突出。

主讲人三：叶海云

题目：存在暴力的竞争经济

摘要：本文在Arrow-Debreu 1954年研究的竞争经济中引入暴力，发现在引入暴力前后均衡的性质迥异：即使在引入暴力前均衡是唯一的、Pareto有效的和公平的，在引入暴力后，均衡不但是不确定的、没有效率的和极不公平的，而且均衡时任何人都可能丧失选择权。虽然自觉地控制暴力的使用程度能够改善资源配置，但当多人具有暴力时，会出现道德互信的问题。在引入暴力前，供给和需求决定价格。但在引入暴力后，如果无节制地使用暴力，则价格是不确定的；如果有节制地使用暴力，则供给、需求和暴力的使用程度三方才能决定价格。