Suppose that disposable income, consumption, and saving in some country are $800 billion, $700 billion, and $100 billion, respectively. next, assume that disposable income increases by $80 billion, consumption rises by $56 billion, and saving goes up by $24 billion.
a. what is the economy’s mpc?

The mpc is the marginal propensity to consume and is the ratio of the increase of spent money over increase in income so in this case the consumption rises by $56 billion and the disposable income by $80 billion so the mpc would be 56/80=0.7.

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Suppose that disposable income, consumption, and saving in some country are $800 billion, $700 billion, and $100 billion, respectively. next, assume that disposable income increases by $80 billion, consumption rises by $56 billion, and saving goes up by $24 billion. a. what is the economy’s mpc?

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Suppose that disposable income, consumption, and saving in some country are $800 billion, $700 billion, and $100 billion, respectively. next, assume that disposable income increases by $80 billion, consumption rises by $56 billion, and saving goes up by $24 billion.
a. what is the economy’s mpc?