how do you calculate the consumption function 
the consumption function can be calculated using a simple formula c a md where c is the consumer spending a is autonomous consumption spending regardless of income levels m is the marginal propensity to consume the amount of additional income needed to spend on goods and services rather than saving it and d is the amount of real disposable income required who introduced the consumption function the consumption function was introduced by economist john maynard keynes he is known as the father of modern macroeconomics and the founder of keynesian economics this branch of economics suggests that governments should be actively involved in their economies rather than let their economies fall under the free market keynes said government spending can be used as a tool to cut back on weakness in the economy 