national investment References national investment economics Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: multiplier…of a change in total national investment on the amount of total national income. It equals the ratio of the change in total income to the change in investment. Read More…of a change in total national investment on the amount of total national income. It equals the ratio of the change in total income to the change in investment. Read More