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小国的“益处”:欧洲货币联盟中的宽松财政政策

The “Benefits” of being small: Loose fiscal policy in the European Monetary Union
Journal of Public Economics · 2024 · Lamar Crombach、Frank Bohn、Jan‐Egbert Sturm

中文摘要

独立中央银行通常会抵消原本会使通货膨胀率升至目标水平以上的正向财政冲击。在一个理论模型中,我们表明,在货币联盟内,由于统辖联盟整体的中央银行必须将所有成员国的财政政策纳入考量,这一机制意味着其对单个成员国财政冲击的反应较弱。模型强调,鉴于小成员国对联盟总体通货膨胀率的影响只是边际性的,中央银行对其财政冲击的反应尤其微弱。在实证分析中,我们利用选举的外生变动,表明欧洲中央银行对较大国家财政冲击的反应更为强烈。随后,我们提供证据表明,小国会利用这一点:与大国相比,小国在选举年份更倾向于实施财政扩张。在扩展分析中,我们从理论和实证两方面讨论了为何在危机时期小国与大国之间的这种差异会消失。

Abstract

Independent central banks typically counteract positive fiscal shocks that would otherwise increase the inflation rate above the target. In a theoretical model, we show that, in a monetary union, this mechanism implies weaker responses to national fiscal shocks because the overarching central bank must account for the fiscal policies of all members. The model highlights that the response is especially weak for small members, given their marginal impact on the union’s aggregate inflation rate. Empirically, we exploit the exogenous variation in elections to show that the European Central Bank reacts more vigorously to fiscal shocks from larger countries. We then provide evidence that small countries take advantage of this; they engage more in fiscal expansions during election years than large countries. In an extension, we discuss, both theoretically and empirically, why the difference between small and large countries disappears in times of crisis.
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