What makes a good economist or policymaker?
According to Dani Rodrik, the famous international economist and author, it is only with the correct understanding of economic models and the right application, that economics can be used to improve the world.
You can spend years learning different models and theories in economics, but knowing when and how to use these concepts is what takes you from student to master. This is particularly true when you move from textbooks into the real world.
Economics gives you a range of tools to solve many of life's problems. Sometimes there are too many options to choose from.
Unfortunately, for some countries (like Nigeria), their leaders make the wrong choices. Take a recent example. Under the guise of "protectionist policies", Africa's largest economy closed its land borders for over a year. Despite this being a well documented economic strategy, it was not the right application.