What are the methods, features & difficulties of the national income estimation of Bangladesh?

There are two ways to calculate the methods, features & difficulties of the national income of any country or nation, including Bangladesh.

1. The first is the census of production method.
   
2. The other is called the census of income method.
   

The census of production method mentioned above is a full breakdown of the variety of products that the nation has produced by the country during a calendar year.

When this is  added together to obtain what we call the Gross National Product (GNP).

The census of income method is slightly different, as this involves creating a census to calculate all the income earned by the nation during a calendar year.