政府投资乘数的简单分析
Simple Analytics of the Government Investment Multiplier
AI总结:
本文利用新凯恩斯模型研究公共基础设施投资的影响,通过将其重构为马尔可夫链开发出通用求解方法,为正常时期及不同持续时间的流动性陷阱情景提供了统一分析框架,并发现常用校准下的乘数随陷阱持续时间发散。
摘要:
投资公共基础设施有何影响?我们用新凯恩斯模型回答此问题。我们将模型重构为马尔可夫链,并开发了一种通用求解方法,将零利率下限内外的现有方法作为特例包含在内。我们的框架为公共基础设施的贡献提供了一个简单表达式。我们表明,它提供了一个统一框架来研究公共投资在三种情景下的影响:$(i)$ 正常时期 $(ii)$ 短暂流动性陷阱 $(iii)$ 持久流动性陷阱。我们发现,常用的校准会导致乘数随陷阱持续时间而发散。
英文摘要:
What are the effects of investing in public infrastructure? We answer this question with a New Keynesian model. We recast the model as a Markov chain and develop a general solution method that nests existing ones inside/outside the zero lower bound as special cases. Our framework delivers a simple expression for the contribution of public infrastructure. We show that it provides a unified framework to study the effects of public investment in three scenarios: $(i)$ normal times $(ii)$ short-lived liquidity trap $(iii)$ long-lived liquidity trap. We find that calibrations commonly used lead to multipliers that diverge with the duration of the trap.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。