Explanation​:
To determine GDP, the expenditure approach sums the expenditure of all sectors of the economy: spending on capital by firms, plus spending on domestic goods and services by households, the government, and foreign consumers, minus domestic spending on foreign goods and services.

$GDP=C+I+G+(X-M)$

Choices A and D are incorrect because saving and taxes are never included in GDP. Choice B is incorrect because the equation calculates net exports incorrectly.

Explanation​:
Short-run equilibrium occurs at the intersection of AD and SRAS. Long-run equilibrium occurs when AD = SRAS = LRAS. Therefore, at point $A$, the economy is in short-run equilibrium only.

Explanation​:
Choice D incorrectly describes speculative demand for money. It suggests that money has inherent value and that people speculate on the appreciation of money itself. However, speculative demand for money occurs when people anticipate a change in interest rates and prefer to hold money over interest-bearing assets.
Choice A describes the transactions motive.
Choice B describes the precautionary motive.
Choice C describes the speculative motive.

Explanation​:
Interventionist supply-side policies may be a burden on the government budget but they often lead to a more equitable distribution of income, and less economic inequality.

Choices A, C, and D are possible drawbacks of such policies: they are expensive and may place an unsustainable burden on national debt, they involve long time-lags, and the increased government spending may create inflationary pressures in the economy.

Explanation​:
Statement I is incorrect because an increase in interest rates will lead to higher borrowing costs and a higher reward for saving, resulting in decreased investment expenditure and consumption, thus decreasing AD, not SRAS.

Statement II is incorrect because lower consumer confidence will lead to lower consumption expenditure and decreased AD, not SRAS.

Statement III is correct because higher costs of production across the economy will shift the SRAS curve to the left.

Statement IV is correct because an increase in indirect taxes will also raise the costs of production for businesses and thus shift SRAS to the left.

Explanation​:

Leakages involve income earned that is not spent on domestic goods and services. Leakages include: saving, taxes, and import spending.

Export revenue is an injection into the circular flow, not a leakage.

Therefore, choices A, C, and D are incorrect because export revenue is an injection, not a leakage.

Explanation​:
Choice D is the correct answer because it shows that the equilibrium price level would increase without any increase in the equilibrium GDP level. This occurs when the economy has reached the full employment real GDP and there are no unused factors of production. Increasing AD causes inflation without any growth to real GDP.

Choice A is incorrect because it shows a scenario of growth without any inflation.
Both choices B and C depict a scenario of growth with inflation where both the equilibrium APL and real GDP increase.

Explanation​:
There is often a conflict between achieving economic growth and environmental sustainability. The pursuit of better economic well-being for citizens and increased efficiency of the economic system does not always guarantee environmental sustainability.

Economic growth is often accompanied by job creation and improvements in the standard of living of many citizens, so choices A and B are likely to be true. Economic growth often means an increase in total output produced by the economy, which involves the use of more resources and the production of more waste, so choice C is likely to be true.

It is least likely that economic growth is accompanied by decreases in greenhouse gas emissions, and thus choice D is the least likely to be true.

Explanation​:

The following are adjustments made to GDP to allow for more accurate comparisons over time and between countries:

• • Adjustment for inflation: converts nominal figures into real figures
• • Adjustment for nationality: converts GDP to GNI
• • Adjustment for population size: converts total figures into per capita figures

While inflation, nationality, and population size are commonly adjusted for, there is no commonly used national income measure that adjusts for inequality (Choice D). While it is useful to measure income inequality and use it to compare between countries, it is not necessarily relevant to GDP calculations and adjustments.

Explanation​:
Current expenditure refers to government spending on goods and services within the year.

Choice A is wrong, as it is an example of capital expenditure—government spending to expand the economy's productive capacity.

Choices C and D are wrong, as they are examples of transfer payments.

Explanation​:
Statement I is a strength of market-based supply-side policies: they make the economy more efficient and competitive, which improves the allocation of resources.

Statement II is another strength of market-based supply-side policies. Removing restrictions from free market activities is less costly than interventionist supply-side policies.

Statement III is a constraint of market-based supply-side policies, as they can lead to a more unequal distribution of income, and deregulation may increase market failures, negatively impacting the environment.

Statement IV is a strength of interventionist supply-side policies, rather than market-based supply-side policies.

Explanation​:
Choice A is the correct answer by definition. Quantitative easing is a process where a central bank buys long-term government bonds (and other financial assets) from commercial banks (other financial institutions) and credits their accounts with electronic reserves as digital entries held by the commercial banks at the central bank.

Explanation​:
An excise tax is a tax paid on specific commodities like cigarettes or petrol. It is a tax on expenditure, therefore it is an indirect tax.

Options A, B, and D are examples of direct taxes.

• Option A: as it is a tax on the wealth of an individual.
• Option B: as it is a tax on the income of companies.
• Option D: as it is the tax on the income of individuals.

Explanation​:
An increase in the corporate tax rate will decrease AD by decreasing investment in the economy.

Choices B and D redistribute income in a way that should increase consumption, as the marginal propensity to consume for lower-income households tends to be higher.

Choice C is wrong, as increasing government spending directly increases AD.

Explanation​:
A shift of the SRAS curve to the left constitutes a negative supply shock and will push the economy into a period of stagflation, where the economy is experiencing both inflation and recession. As a result, the inflation rate rises and the unemployment rate rises as well.

Choice A would be the result of AD shifting rightward.

Choice B would be the result of AD shifting leftward.

Choice D would be the result of SRAS shifting rightward.

Explanation​:
When AD decreases (AD to AD1​), the economy will be producing below its full-employment level of output: this is known as a recessionary gap.

During a recessionary gap, unemployment rises as businesses lay off workers in response to decreasing aggregate demand.

Choice A would be correct if AD shifted rightward.

Choice C would be correct if SRAS shifted leftward.

Choice D is not possible, as rising unemployment is a defining characteristic of a recession.

Explanation​:
Closing an inflationary gap requires a decrease in AD, and increasing income tax and reducing the money supply are both contractionary policies, making D the correct answer.

Choices A, B, and C include expansionary policies, which do not close inflationary gaps.

Explanation​:
A decrease in aggregate demand will create a recessionary gap and push the economy into recession. This creates cyclical unemployment, which is caused by a decrease in overall aggregate demand, and so businesses decrease their demand for labor.

Choices A, C, and D are also types of unemployment, but they are not caused by a decrease in aggregate demand.

Explanation​:
Budget deficits are financed through borrowing, which will $\text{‘}$crowd out$\text{’}$ private investment. Increased government borrowing makes loanable funds scarcer, driving up their price (interest rates).

Choices A, B and C are wrong, as sustained budget deficits increase AD and therefore the level of economic activity, resulting in:

• decreased net exports (X-M), which move the country towards a current account deficit
• increased inflation
• decreased unemployment

Statement II is incorrect because personal income tax cuts fall under market-based supply-side policies relating to incentives, rather than encouraging competition.

Statement III is correct because removing barriers to trade will allow foreign businesses to compete with domestic businesses. This competition incentivises domestic firms to be more efficient.

Statement IV is incorrect because abolishing minimum wages falls under market-based supply-side policies that are aimed at making the labour market more flexible rather than policies to encourage competition.

Explanation​:
The goals of a central bank are focused on achieving short-term economic stability. These objectives include achieving low and stable inflation, implementing inflation targeting (choice A), reducing unemployment rates (choice B), and minimizing fluctuations in the business cycle (choice D).

Choice C is the correct answer because it is usually attributed to the goal of the executive branch of government and not the central bank.

Explanation​:
Statement I is incorrect. Discretionary spending refers to changes in spending that require a decision to be made by the government. Such changes are not automatic.

Statement II is correct. Progressive taxation and unemployment benefits act as automatic stabilisers. In countries with a more progressive income tax and a larger welfare state, the impact of automatic stabilisers will be more significant.

Statement III is correct. Automatic stabilisers make the business cycle less volatile, keeping the growth rate lower in $\text{‘}$boom$\text{’}$ periods.