Adding an external sector to the Keynesian income-expenditure model implies that for equilibrium, in terms of leakages and injections Group of answer choices planned saving cannot not be equal to planned investment if the sum of taxation and imports is diiferent from the sum of government expenditure and exports planned saving must equal planned investment but the budget balance and/or the trade balance cannot be equal to zero it is not necessary for planned saving and planned investment to be equal but exports must be equal to imports it is not necessary for planned saving and planned investment to be equal but if they are unequal then either the budget or the trade balance must be equal to zero.

n the simple two-sector Keynesian income-expenditure model with no government or external sector, assuming actual and planned saving are always equal, when aggregate output is less than aggregate planned expenditureGroup of answer choicesany unplanned change in inventories will be negativeactual investment is greater than planned investmentplanned saving is greater than planned investmentactual saving is equal to planned investment

In the Keynesian income-expenditure model, equilibrium income is necessarily equal to a multiple ofGroup of answer choicesthe exogenous component of planned aggregate expenditure which is partly dependent on the autonomous component of taxation when government is includedthe autonomous component of consumption, regardless of whether the economy is closed or openthe sum of investment, government expenditure and net exportsnone of the other alternatives are correct.

In the open-economy Keynesian income-expenditure model which includes a government sector with endogenous taxation, which of the following statements could apply to the process of adjustment towards an equilibrium?Group of answer choicesAn increase in government expenditure, without any changes in investment or exports must generate a matching change in the sum of saving, taxation and imports.An increase in investment by itself will generate a rise in saving, imports and taxation via changes in the level of income.An increase in injections would cause a matching increase in withdrawals because of the resulting change in the level of income occurring through the multiplier.All of the other statements are correct.

Consider the Keynesian income-expenditure model with a government sector but no foreign sector. Assume that taxation is partly endogenous and dependent on the level of income. Suppose that the government increases expenditure by $200 million and reduces the exogenous component of taxation by $100 million. Taking the budget balance as being equal to total taxes less government expenditure, which of the following statements is correct?Group of answer choicesThe equilibrium level of income will increase and at the new equilibrium level of income the government’s budget balance will be worse off by $300 million compared with its initial level.If the level of private sector investment is unchanged, then the equilibrium level of income will also be unchanged.The effect on equilibrium income will be equivalent to $300 multiplied by the government expenditure multiplier.The equilibrium level of income will increase and at the new equilibrium level of income, if the government’s budget balance is worse off compared with its initial level, it will be worse off by something less than $300 million.

Consider the open-economy Keynesian income-expenditure model. Comparing the effect of an exogenous increase in government expenditure with that of an exogenous increase in exports, ceteris paribus, the increase in government expenditure willGroup of answer choicesbring about a smaller change in equilibrium income and a worse outcome for the trade balancebring about a larger change in equilibrium income but a better outcome for the trade balancebring about the same change in equilibrium income but a better outcome for the trade balancebring about the same change in equilibrium income but a worse outcome for the trade balance.