GDP and Welfare

The real output per capita index is calculated by adjusting the real GDP index for the population index: (120 ÷ 110) × 100 = 109.09, approximately 109. Thus option A is correct. Option C ignores population growth, option B is a rough but less accurate value, and option D incorrectly multiplies the two indices. The calculation shows that total real output grew faster than population.

Additional fuel purchases and vehicle repairs involve market transactions and can increase measured expenditure and GDP, particularly when they represent final services or replacement activity. Congestion simultaneously imposes lost working or leisure time, stress, pollution, and extra vehicle wear. These costs may reduce welfare even as recorded spending rises. Therefore option B is correct; the other choices are either absolute, incorrect, or misuse the idea of intermediate goods.

Real output per capita equals real GDP divided by population. Initially it is 200 billion divided by 100 million, or 2,000 units per person. Finally it is 210 billion divided by 110 million, about 1,909 units per person. Although total real GDP rises by 5%, population rises by 10%, so output per person falls. Hence option B is correct.

GDP records the market value of mineral extraction as current production, but conventional GDP does not fully subtract the loss of the natural asset being depleted. Extraction can therefore raise measured GDP while reducing future productive capacity and harming sustainability. A welfare assessment must consider resource depletion, environmental damage and future generations, so option C is the appropriate conclusion.

The governing accounting principle is that GDP adds the market value of final goods and services, without subtracting every social cost. Pollution-producing activity can raise GDP through its sale, and later cleanup services can also raise GDP through their payment. Thus measured GDP may increase even though environmental damage has occurred; it is not a complete measure of net welfare. Option D is correct.

Real GDP is obtained by dividing nominal GDP by the price index, with the relevant base scaling understood. Suppose nominal GDP is initially 100 and the price index is 100; after equal 25% rises they become 125 and 125. The ratio remains 125/125 = 1, just as 100/100 = 1. Thus the exact change in real GDP is zero, so option B is correct.

The gross-net distinction is central: net domestic product equals GDP minus consumption of fixed capital, commonly called depreciation. Depreciation represents the value of machinery, buildings and other fixed capital used up during production. By deducting this amount, NDP indicates the output remaining after maintaining the capital stock, so it can be more informative for sustainability than GDP. It does not, however, capture every environmental cost.

Real GDP per capita is an average, so it can rise without benefiting every group equally. If most additional income goes to high-income households while food, housing or other necessities become more expensive for poor households, their real purchasing power and living standard may decline. Distributional effects and group-specific costs are therefore essential in welfare analysis. Option A describes this situation.

The relevant concept is per-capita growth: when rates are small, growth in output per person is approximately real GDP growth minus population growth. Thus, 7% − 2% = 5%. The exact calculation is (1.07 ÷ 1.02 − 1) × 100, which is about 4.90%, confirming the approximation. Therefore A is correct; B adds the rates, C multiplies or miscombines them, and D ignores output growth.

Exact per-capita growth is calculated by dividing the output growth factor by the population growth factor and subtracting one: (1.08 ÷ 1.04 − 1) × 100. The result is approximately 3.846%, or 3.85%. Therefore option B is correct. Four percent is only the small-rate subtraction approximation; twelve percent adds the rates, and two percent does not follow from the given factors.

GDP measures recorded market production, whereas welfare also includes health and environmental conditions. In the short run, costly pollution-control technology can raise firms’ costs and slow measured output growth. However, cleaner air may reduce illness, medical burdens, and lost working days, creating social benefits that GDP does not fully record. Therefore, option D correctly separates measured production from broader welfare; the other options wrongly assume that cost automatically determines total welfare.

Average income is an aggregate measure and can rise even when some people lose jobs or face insecure incomes. Welfare analysis must therefore examine how income and employment are distributed, whether households have income security, and whether growth is inclusive. Unemployment has social and economic costs but is not simply added to GDP. Option A is correct; options B, C, and D either misuse national accounts or ignore distributional effects.

Real GDP records the inflation-adjusted value of market production, not every aspect of people’s well-being at work. Safer workplaces, better job quality, and lower injury risk can increase workers’ satisfaction and security even if output remains unchanged. Thus welfare may rise without a rise in real GDP. Option B is correct; unchanged welfare, falling GDP, or a purely price-level effect does not logically follow from improved safety.

Government vaccination is a non-market service because it is supplied without a directly observed market price. In national accounting, such government services are generally valued by the cost of production, including relevant employee compensation, medicines, supplies, and other operating inputs. The absence of user payment does not mean that output is zero. Therefore option C is correct; happiness is a welfare outcome, not the accounting valuation method.

Real GDP per capita is most informative about material production when prices are reasonably stable and major non-market conditions do not change sharply. If income distribution and environmental quality remain broadly stable, changes in output per person provide a useful, though incomplete, indication of material welfare. Option D states these conditions. The other situations introduce pollution, reconstruction spending, or missing distributional information, which weakens the indicator.

GDP counts market expenditure on hospital and medical services, so fewer admissions can reduce some recorded production and make GDP growth slower. Welfare can nevertheless improve because people experience better health, fewer days of illness, lower treatment burdens, and greater productive time. Spending is not identical to well-being. Hence option A is correct, while the other choices incorrectly assume that lower medical spending must reduce welfare.

GDP is valuable because it measures the market value of current production, but it is not a complete measure of welfare. A balanced assessment should consider real GDP per capita together with income distribution, environmental quality, health, education, safety, and leisure. Option B uses GDP appropriately while adding relevant social indicators. The other options either reject a useful measure or draw excessive conclusions from nominal GDP or exports alone.

The governing concept is the limitation of GDP as a welfare measure and the treatment of defensive expenditure. Polluting production can add to measured market output, while paid cleanup services can also add to GDP because they are newly produced services. However, cleanup may merely repair damage caused by pollution rather than create a comparable improvement in welfare. Thus GDP may rise from both activities even while net welfare remains doubtful. Cleanup is not automatically excluded, and pollution does not always improve welfare.

The governing concept is that GDP per person measures average production or income, not how that income is shared. If real per capita GDP is equal, the country with a more equal distribution is more likely to provide broader access to goods and services, so option C is correct. Option A reverses the welfare implication, B ignores inequality, and D treats population size as decisive when the comparison is per person.

The governing distinction is between nominal GDP, measured at current prices, and real GDP, which removes the effect of general price changes. If nominal growth mainly reflects inflation, purchasing power and physical output may not improve, so option D is correct. Options A, B, and C describe changes that can support welfare more directly, although GDP alone still cannot capture every welfare dimension.

National income accounting generally records market transactions with observable monetary values, while unpaid household production is usually outside measured GDP. Replacing a paid cleaner with a family member can therefore reduce recorded GDP even though the cleaning service continues and household welfare may change little. Thus option A is correct; the other choices claim impossible or unnecessarily absolute effects.

Real output per person equals real GDP divided by population. Using the growth rates, the approximate change is (1.07/1.09) − 1, which is about −1.8 percent. Since population grows faster than real output, real output per person falls, making option B correct. Options C and D are mathematically impossible, while A contradicts the comparison of growth rates.

GDP records the monetary value of many market transactions, but it usually omits or incompletely values unpaid household services. It also does not automatically subtract pollution, resource depletion, or other environmental damage. Therefore option C identifies both limitations. Options A, B, and D are false descriptions of national accounting and do not address the combined welfare problem.

GDP captures the value of additional market production, but it is not a complete social welfare account. A welfare assessment should compare the project’s output and income gains with displacement, lost livelihoods, disruption, and other social costs. Hence option D is correct. Option A counts only the benefit, B counts only one financial cost, and C wrongly ignores a major consequence.

Per capita GDP is an average economic indicator; it does not guarantee good health, education, personal safety, or equal access to public services. If these human-development conditions are weak, welfare can remain low despite high average income, so option A is correct. Options B, C, and D describe conditions that generally support welfare rather than reduce it.