主题：Negative Interest Rates on Central Bank Digital Currency
主讲人：贾鹏飞 南京大学
主持人：王彬 暨南大学
时间：2024年10月18日（周五）下午14:00-15:30
地点：暨南大学石牌校区经济学院大楼（中惠楼）102室
摘要
Paying negative interest rates on central bank digital currency (CBDC) becomes increasingly relevant to monetary operations, since several major central banks have been actively exploring both negative interest rate policy and CBDC after the Great Recession. This paper provides a formal analysis to evaluate the macroeconomic impact of negative interest rates on CBDC through the lens of a neoclassical general equilibrium model with monetary aggregates. In the benchmark model, agents have access to two types of assets: CBDC and productive capital. The demand for digital currency is motivated by a liquidity constraint. I show that paying negative interest on CBDC induces agents to save less and consume more via a substitution effect. A drop in savings in turn causes a fall in capital investment, subsequent output, and real money balances. To clear the money market, the price level increases. I then extend the model to include government bonds which deliver a positive return. This allows me to study a non-trivial portfolio effect: when the government pays a negative interest rate on CBDC, the tax on agents' capital spending increases, inducing a decrease in capital investment and an increase in government bonds in agents' portfolio. Such a policy causes a drop in investment and output. However, there is a transitory decline in the price level due to a flight to quality.
主讲人简介
贾鹏飞，现任南京大学商学院经济学系副教授，英国曼彻斯特大学经济学博士，英国高等教育研究院副研究员。曾在国际清算银行货币经济研究部做短期研究工作。主要研究领域为宏观经济学，货币经济学，央行数字货币，宏观审慎政策，财政政策，以及国际金融。研究成果发表在European Economic Review、Macroeconomic Dynamics、Journal of Macroeconomics、B.E. Journal of Macroeconomics、Economics Letters、《经济研究》《数量经济技术经济研究》《财贸经济》《中国软科学》《中国社会科学内部文稿》等国内外学术期刊，论文被《高等学校文科学术文摘》、人大复印报刊资料全文转载。主持和参与多项国家自然科学基金和国家社会科学基金项目。研究成果获教育部第九届高等学校科学研究优秀成果奖（人文社会科学）二等奖，吉林省第十三届社会科学优秀成果奖一等奖，江苏省第十七届哲学社会科学优秀成果奖二等奖，第六届洪银兴经济学奖。
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校对| 王 彬
责编| 彭 毅
初审| 李仲达
终审发布| 何凌云
（来源：暨南大学经济学院微信公众号）
