1] Prof Kenneth E Boulding, “Macroeconomics deals, not with individual quantities as such but with the aggregates of these quantities, not with individual incomes but with national income, not with prices but with the price level, not with individual output but with the national output”.
“Macroeconomics theory is that part of the subject which deals with the great aggregates and the averages of the system rather than with particular items in it and attempts to define these aggregates in a useful manner and to examine their relationship”.
2] Professor Gardener Ackley, “Macroeconomics concerns itself with such variables as the aggregate volume of the output of an economy, with the extent to which its resources are employed, with the size of the national income, with the general price level”.
3] J.L.Hansen, “Macroeconomics is that branch of economics which considers the relationship between large aggregated such as the volume of employment, total amount of savings, investment, national income etc”
4] The Economist’s Dictionary of Economics defines Macroeconomics as “The study of whole economic systems aggregating over the functioning of individual economic units. It is primarily concerned with variables which follow systematic and predictable paths of behaviour and can be analysed independently of the decisions of the many agents who determine their level. More specifically, it is a study of national economies and the determination of national income.”
5] Prof Carl Shapiro, “Macroeconomics deals with the functioning of the economy as a whole.”
6] “Macroeconomics theory is that part of the subject which deals with the great aggregates and the averages of the system rather than with particular items in it and attempts to define these aggregates in a useful manner and to examine their relationship”.