What happens to central banks under pressure?

Key Takeaways

Political pressure on central banks can lead to severe economic instability and high inflation.
Central bank independence is vital for long-term economic stability, shielding monetary policy from short-term political interests.
Approximately 40% of central banks faced political pressure between 2010 and 2018, often to lower interest rates.
Losing central bank independence can quickly erode trust, while regaining it requires decades of sustained effort.

Scholar Carolina Garriga notes that presidential pressure in Argentina led to spiraling inflation and currency devaluation.
Similar political pressure in Turkey resulted in an 80% inflation rate.
Garriga observes early signs of central bank independence erosion in the U.S., akin to patterns seen in Belarus, Zimbabwe, and Hungary.
Known negative economic consequences include increased inflation volatility and loss of credibility.

The concept of central bank independence gained traction globally over the last 50 years to shield monetary policy from short-term political interests.
Carolina Garriga's research analyzes central bank laws from 1970 to 2023 across 192 countries.
Her work examines factors like appointment terms and the breadth of central bank objectives, noting broader objectives can invite political interference.
Countries with less independent central banks, such as Belarus and Venezuela, experienced higher inflation and economic volatility.

Law professor Lev Menand is refining the definition and measurement of central bank independence.
Menand, with IMF economists Tobias Adrian and Ashraf Khan, is developing a new index using central bank statutes and official surveys.
Existing indices are criticized for flawed assumptions, such as overemphasizing governor tenure without considering removal protections.
The research team decided against allowing central banks to lend directly to the government for a high independence score.

Lev Menand's team refined central bank independence metrics by distinguishing short-term versus long-term lending.
They do not give credit for legal features undermined by loopholes, requiring multiple criteria to be met simultaneously for independence.
The 10 updated metrics focus on de jure (legal) independence, but a noted shortcoming is the omission of de facto (actual behavior) independence.
A strong legal culture and enforcement are emphasized as vital, as statutes without adherence become practically meaningless.

Economist Carola Binder focuses on de facto independence, analyzing central banks' actual actions rather than just their rules.
Binder identified 2018 as a key year for increased politicization, including President Trump's critical tweets about the Fed.
Her analysis of 2010-2018 data found approximately 10% of central banks globally faced political pressure annually.
Between 2010 and 2018, roughly 40% of central banks faced pressure, most commonly to lower interest rates, correlating with higher inflation.

Once lost, regaining central bank independence is a difficult and lengthy process.
The destruction of institutional trust can happen quickly, but rebuilding it takes decades.
The U.S. Federal Reserve took years and economic hardship to regain credibility after succumbing to political pressure in the 1970s under President Nixon.