The article looks at why some countries put restrictions on moving money in and out, and what happens when they do. They found that countries with low income, lots of government control, and dependent central banks are more likely to have these restrictions. Other factors include how the exchange rate is managed, trade imbalances, and how open the economy is. When countries have capital controls, they tend to have higher inflation and lower real interest rates. However, there isn't a clear link between these controls and economic growth, although countries with high black market prices tend to grow slower.