The study looked at how trade openness, investment, and economic growth are connected in Bangladesh from 1980 to 2006. By using advanced statistical tests, the researchers found that there is a long-term relationship between trade openness, national income growth, and total investment. They also discovered that economic growth influences investment, trade openness affects economic growth, and trade openness impacts investment. These findings support the idea that economic growth is linked to investment and trade openness, but go against the idea that trade openness directly affects investment.