The article explores how banks create money during different economic times. By studying Russian banks from 2004 to 2015, the researchers found that banks tend to create more money when the economy is doing well, which can make economic ups and downs more extreme. They looked at different types of banks, like state-owned and foreign banks, and found that they all behave similarly in terms of creating money. The researchers also discovered that banks create more money than they lend out during good times, which can make economic fluctuations stronger.