The article investigates how having too much debt can harm a country's ability to invest in its own growth. The researchers studied 18 Asian countries from 2000 to 2015 using data from the World Development Indicators. They found that when a country's debt reaches a certain level, it can actually hinder investment instead of helping it, creating a paradox known as debt overhang. This means that having too much debt can hold back a country's economic development.