报告题目一： Asymmetric Effects of Monetary Policy on Firm Scale in China: A Quantile Regression Approach

时间：2018年12月27日上午10:40-11:20

地点：南校区院系楼152会议室

主办单位：数学与统计学院

报告人：方丽婷 博士

报告人简介：方丽婷，厦门大学经济学院计划统计系应用经济学（统计学）博士，福州大学管理科学与工程博士后科研流动站管理学（金融工程方向）专业博士后，美国纽约州立大学访问学者，硕士生导师。现任福州大学经济与管理学院统计系教师，入选 2018 年度福建省高校杰出青年科研人才培育计划。

内容简介：This study explores asymmetric effects of monetary policy on firm scale at different firm size levels. Using panel data of non-financial Chinese listed firms between 2011 and 2016, we find that Chinese firms respond to raising benchmark lending interest rates and deposit reserve requirements by decreasing their scales as predicted by monetary transmission mechanisms. Our quantile regression results also indicate that larger firms respond more strongly to both policy instruments by adjusting their scales to a larger degree compared to smaller firms. In addition, we find that state-owned-enterprises react less strongly to monetary policy changes than their privately controlled counterparts at all firm size distribution. Our results also suggest that the impact of monetary policy on firm scale is stronger after the policy reform allowing commercial banks more leeway to set their interest rates. Overall, our results indicate that firm heterogeneity and regulatory environment affect the effectiveness of monetary policy in influencing firm behavior.

报告题目二： Stability analysis of the split-step theta method for nonlinear regime-switching jump systems

时间：2018年12月27日上午11:20-12:00

地点：南校区院系楼152会议室

主办单位：数学与统计学院

报告人：李光洁 博士

报告人简介：李光洁，华南理工大学应用数学博士，主要研究领域：随机微分方程、稳定化、数值模拟以及动力系统。

内容简介：This paper investigates the stability of the split-step theta (SST) method for a class of nonlinear regime-switching jump systems--neutral stochastic delay differential equations (NSDDEs) with Markov switching and jumps. As we know, few results on the stability of numerical solutions for NSDDEs with Markov switching and jumps. The purpose of this paper is to enrich conclusions in such respect. It first devotes to show that the trivial solution of the NSDDE with Markov switching and jumps is exponentially mean square stable and asymptotically mean square stable under some suitable conditions. If the drift coefficient also satisfies the linear growth condition, it then proves that the SST method applied to the NSDDE with Markov switching and jumps shares the same conclusions with the exact solution. Moreover, a numerical example is demonstrated to illustrate the obtained results.