Angola 12th Grade National Examination — Introduction to Economics (Introdução à Economia)

What is the fundamental economic problem that forms the core object of study in economic science?

• AThe scarcity of productive resources relative to unlimited human wants and needs
• BThe total elimination of unemployment through mandatory state employment programs
• CThe exclusive regulation of international trade balances and foreign exchange reserves
• DThe mechanical distribution of equal monetary income to all households in a society

In the economic classification of human needs, how are primary (vital) needs distinguished from secondary (cultural/social) needs?

• APrimary needs are essential for biological survival (food, water, basic shelter), whereas…
• BPrimary needs can only be satisfied by public goods provided by the State, whereas second…
• CPrimary needs are completely unlimited in scope, whereas secondary needs disappear perman…
• DPrimary needs require financial capital to be fulfilled, whereas secondary needs require…

Which of the following pairs correctly illustrates the distinction between an economic good and a free good?

• AA bottled mineral water container (scarce, requires human labor and has a price) versus a…
• BA public highway with no tolls (free good) versus a private hospital consultation (econom…
• CA commercial bank loan (free good) versus a treasury bill issued by the central bank (eco…
• DAgricultural fertilizer imported under a subsidy (free good) versus domestic crude oil (e…

In the national accounts system and the circular flow of income, what is the primary economic function of the institutional sector 'Households' (Famílias)?

• AFinal consumption of goods and services and the supply of productive factors (especially…
• BThe production of non-financial commercial goods and services exclusively for profit maxi…
• CThe centralized emission of legal tender currency and regulation of national interest rat…
• DThe collection of compulsory fiscal revenue to redistribute national income through publi…

In the macroeconomic circular flow diagram between Households and Non-Financial Enterprises, how do the 'Real Flow' and 'Monetary Flow' interact?

• AThe real flow transfers factor services (labor) to firms and finished goods to households…
• BThe real flow consists entirely of bank loans and credit cards, while the monetary flow c…
• CBoth real and monetary flows travel in the exact same physical direction from households…
• DThe monetary flow represents only international foreign aid, while the real flow represen…

What is the economic definition of 'Opportunity Cost' (Custo de Oportunidade)?

• AThe value of the best alternative sacrificed or forgone when an economic decision is made
• BThe total accounting sum of all direct financial cash expenditures incurred during a tran…
• CThe depreciation value of physical fixed assets recorded at historical purchase prices
• DThe statutory tax rate imposed on luxury goods by the national revenue administration

An agricultural enterprise in Huambo operates along a linear Production Possibility Frontier (PPF). With its available land and labor, it can produce either 500 tonnes of maize and 0 tonnes of beans, or 0 tonnes of maize and 250 tonnes of beans. What is the opportunity cost of producing 1 additional tonne of beans?

• A2.0 tonnes of maize
• B0.5 tonnes of maize
• C250 tonnes of maize
• D1.0 tonne of maize

Why is the standard Production Possibility Frontier (FPP) typically concave (bowed outward) with respect to the origin?

• ABecause productive resources are specialized and not perfectly adaptable to the productio…
• BBecause technological progress is legally prohibited from benefiting more than one indust…
• CBecause consumer demand decreases as more units of a good are produced according to the l…
• DBecause the total supply of physical currency in the banking system is held strictly cons…

On an economy's Production Possibility Frontier (PPF), how are a point inside the curve, a point on the curve, and a point outside the curve interpreted?

• AInside: productive inefficiency or underutilization of resources; On the curve: full prod…
• BInside: maximum possible economic growth; On the curve: high structural inflation; Outsid…
• CInside: unattainable production targets; On the curve: monopolistic exploitation; Outside…
• DInside: trade surplus; On the curve: budget deficit; Outside: balanced international paym…

In classical and neoclassical economic theory, what are the four fundamental factors of production (fatores de produção)?

• ALand (natural resources), Labor, Capital, and Entrepreneurship (organization/initiative)
• BCurrency, Gold reserves, Commercial credit, and Fiscal taxation
• CRaw materials, Advertising, Bank deposits, and Import tariffs
• DConsumer demand, Inflation, Foreign exchange rates, and Public debt

Which of the following correctly pairs each factor of production with its corresponding economic remuneration (income payment)?

• ALabor → Wage; Land → Rent; Capital → Interest; Entrepreneurship → Profit
• BLabor → Interest; Land → Profit; Capital → Wage; Entrepreneurship → Rent
• CLabor → Dividend; Land → Royalty; Capital → Tax; Entrepreneurship → Wage
• DLabor → Rent; Land → Subsidy; Capital → Profit; Entrepreneurship → Interest

A cassava processing plant in Malanje has fixed machinery and varies its workforce. Output data is: 1 worker produces 10 tonnes; 2 workers produce 25 tonnes; 3 workers produce 45 tonnes; 4 workers produce 60 tonnes; 5 workers produce 70 tonnes. At which worker does the plant first experience Diminishing Marginal Returns?

• AThe 4th worker
• BThe 2nd worker
• CThe 3rd worker
• DThe 5th worker

What is the mathematical and geometric relationship between Marginal Product (MP) and Average Product (AP) in the theory of short-run production?

• AWhen MP > AP, Average Product is rising; when MP < AP, Average Product is falling; and th…
• BWhen MP > AP, Average Product is falling rapidly toward zero
• CThe MP curve intersects the AP curve exclusively at the origin (zero output)
• DAverage Product is always strictly greater than Marginal Product at all levels of product…

Every economic system must answer three fundamental questions arising from resource scarcity. What are these three questions?

• AWhat to produce, How to produce, and For whom to produce?
• BWhy to tax, Where to export, and When to print currency?
• CHow much profit to declare, Which bank to borrow from, and Who to employ?
• DWhat legal system to adopt, How to enforce contracts, and Which currency to peg?

How does a Centrally Planned Economy (Economia de Direção Central) fundamentally differ from a Free Market Economy (Economia de Mercado)?

• AIn a centrally planned economy, the State owns most means of production and determines al…
• BIn a centrally planned economy, consumer sovereignty completely dictates production quota…
• CIn a market economy, all commercial enterprises are strictly prohibited from generating p…
• DIn a centrally planned economy, inflation and unemployment are automatically eliminated b…

What is the primary distinction between Microeconomics and Macroeconomics?

• AMicroeconomics studies the behavior and decision-making of individual economic agents (co…
• BMicroeconomics deals exclusively with agricultural production, whereas Macroeconomics stu…
• CMicroeconomics focuses on international diplomatic treaties, whereas Macroeconomics is re…
• DMicroeconomics applies only to developing economies like Angola, whereas Macroeconomics a…

Which of the following statements represents a 'Positive Economic Statement' rather than a 'Normative Economic Statement'?

• A'An increase in the central bank policy rate (Taxa BNA) by 200 basis points tends to incr…
• B'The government of Angola ought to allocate 30% of the national budget exclusively to sec…
• C'The Value Added Tax (IVA) rate should be completely abolished to make consumer goods fai…
• D'The minimum wage in the agricultural sector is too low and must be doubled immediately b…

A provincial government in Angola has a fixed capital budget of 100 billion AOA. It can build either 4 modern general hospitals (costing 25 billion AOA each) or 20 technical secondary schools (costing 5 billion AOA each). If the provincial government decides to build 3 hospitals and 5 schools, what is the opportunity cost of building the 3rd hospital?

• A5 technical secondary schools
• B20 technical secondary schools
• C1 technical secondary school
• D25 billion AOA in physical cash

In capital theory and national accounting, how is Net Investment (Investimento Líquido) calculated from Gross Investment (Investimento Bruto / FBCF)?

• ANet Investment = Gross Investment minus Depreciation (Consumption of Fixed Capital)
• BNet Investment = Gross Investment plus Total Direct Corporate Taxes
• CNet Investment = Gross Investment multiplied by the National Bank Reserve Ratio
• DNet Investment = Gross Investment divided by the Annual Consumer Price Index

In economics, what is the distinction between 'Final Consumption' (Consumo Final) and 'Intermediate / Productive Consumption' (Consumo Intermédio)?

• AFinal consumption satisfies human needs directly (e.g. a household eating bread), while i…
• BFinal consumption occurs only in the public sector, while intermediate consumption occurs…
• CFinal consumption involves only durable capital goods, while intermediate consumption inv…
• DFinal consumption is recorded as a tax deduction, while intermediate consumption is legal…

According to the fundamental Law of Demand (Lei da Procura), what is the relationship between the price of a good and the quantity demanded, assuming ceteris paribus?

• AAn inverse (negative) relationship: as the price of the good rises, the quantity demanded…
• BA direct (positive) relationship: as the price of the good rises, the quantity demanded i…
• CA constant horizontal relationship: quantity demanded remains invariant regardless of pri…
• DAn exponential relationship: quantity demanded doubles for every unit price increase

Which of the following events will cause a rightward shift in the market demand curve for domestically produced rice in Angola?

• AA significant increase in the price of imported pasta (a close substitute good)
• BA general decrease in the average disposable income of consumers, assuming rice is a norm…
• CA substantial decrease in the market price of domestic rice itself
• DA widespread consumer preference shift away from grains toward imported dairy products

What is the crucial economic difference between a 'change in quantity demanded' and a 'change in demand'?

• AA change in quantity demanded is a movement along a fixed demand curve caused solely by a…
• BA change in quantity demanded is caused exclusively by changes in national income tax rat…
• CA change in quantity demanded shifts the supply curve, while a change in demand changes t…
• DThere is no difference; both terms are completely synonymous in microeconomic theory

According to the Law of Supply (Lei da Oferta), how does a producer typically respond to an increase in the market price of their product, ceteris paribus?

• ABy increasing the quantity supplied to the market, because higher prices improve profit m…
• BBy completely stopping production until prices return to their historical baseline
• CBy reducing the quantity supplied to create artificial consumer shortages
• DBy reducing wages paid to workers in exact proportion to the price increase

Which of the following factors will cause a rightward (outward) shift in the market supply curve for manufactured building materials in Luanda?

• AA technological innovation that significantly lowers unit production costs and improves e…
• BA substantial increase in the cost of imported raw materials and industrial electricity t…
• CThe introduction of a new heavy indirect excise tax on local industrial production
• DThe bankruptcy and permanent market exit of several major manufacturing factories

In a competitive market for vegetable oil in Benguela, the market demand function is Q_d = 1200 - 40P and the market supply function is Q_s = 200 + 60P, where P is the price in thousands of AOA. What are the equilibrium price (P^*) and equilibrium quantity (Q^*)?

• AEquilibrium Price = 10 thousand AOA; Equilibrium Quantity = 800 units
• BEquilibrium Price = 14 thousand AOA; Equilibrium Quantity = 640 units
• CEquilibrium Price = 8 thousand AOA; Equilibrium Quantity = 880 units
• DEquilibrium Price = 12 thousand AOA; Equilibrium Quantity = 720 units

If the prevailing market price in a competitive market is set above the equilibrium price, what condition arises and how does a free market naturally restore equilibrium?

• AAn excess supply (surplus) emerges; unsold inventories accumulate and producers cut price…
• BAn excess demand (shortage) emerges; buyers bid prices up until the government sets a leg…
• CA permanent state of zero demand occurs that forces all firms into immediate bankruptcy
• DThe market demand curve automatically rotates until it becomes vertical

When the price of a public transport ticket in Luanda increases from 150 AOA to 180 AOA (a 20% increase), the daily number of passenger trips falls from 50,000 to 45,000 (a 10% decrease). What is the Price Elasticity of Demand (PED) and how is this demand categorized?

• APED = -0.50; Inelastic demand (|PED| < 1)
• BPED = -2.00; Elastic demand (|PED| > 1)
• CPED = -1.00; Unitary elastic demand (|PED| = 1)
• DPED = -0.10; Perfectly inelastic demand (PED = 0)

If a pharmaceutical company in Angola sells an essential, life-saving medication for which there are no substitutes, what is the most likely Price Elasticity of Demand (PED) and graphical representation of its demand curve?

• AHighly inelastic (or perfectly inelastic, PED approaching 0), represented by a steep or n…
• BHighly elastic (PED > 5), represented by a completely horizontal demand curve
• CUnitary elastic (PED = -1.0), represented by a standard 45-degree linear line
• DPositive elastic (PED > +2.0), represented by an upward-sloping demand curve

A telecommunications provider analyzes the demand for mobile data packages and finds that demand is price elastic (|PED| = 1.8). If the company raises its prices by 15%, what will happen to its Total Revenue (TR = P × Q)?

• ATotal Revenue will decrease, because the percentage drop in quantity demanded (27%) will…
• BTotal Revenue will increase by exactly 15%, because price changes always dominate quantit…
• CTotal Revenue will remain completely unchanged due to the law of conservation of revenue
• DTotal Revenue will double, because higher prices automatically expand corporate market sh…

An econometric study in Luanda determines that when household real incomes rise by 10%, the quantity demanded of low-grade canned fish falls by 6%. What is the Income Elasticity of Demand (YED) and how is this good classified?

• AYED = -0.60; Inferior good (Bem Inferior)
• BYED = +0.60; Normal necessity good (Bem Normal de 1.ª Necessidade)
• CYED = +1.60; Luxury good (Bem de Luxo / Superior)
• DYED = 0.00; Neutral good (Bem Neutro)

If the Cross-Price Elasticity of Demand (XED) between Good X (coffee) and Good Y (tea) is +1.4, what is the economic relationship between these two goods?

• AThey are substitute goods (bens sucedâneos/substitutos): an increase in the price of tea…
• BThey are complementary goods (bens complementares): an increase in the price of tea cause…
• CThey are independent goods with zero economic relationship
• DThey are public collective goods provided exclusively by the state administration

When the price of artisanal bricks rises from 100 AOA to 125 AOA (a 25% increase), local brickmakers increase their production from 20,000 to 30,000 bricks per month (a 50% increase). What is the Price Elasticity of Supply (PES) and how is supply categorized?

• APES = +2.00; Price elastic supply (PES > 1)
• BPES = +0.50; Price inelastic supply (PES < 1)
• CPES = +1.00; Unitary elastic supply (PES = 1)
• DPES = +0.25; Perfectly inelastic supply (PES = 0)

If the government imposes a legal Maximum Price (Price Ceiling / Preço Máximo) on essential food products strictly below the market equilibrium price, what is the inevitable economic consequence in the market?

• AA persistent market shortage (excess demand), queuing, and the emergence of informal/blac…
• BAn immediate excess supply (surplus) that forces warehouses to discard unsold food
• CAn automatic outward shift of the market supply curve that eliminates all production costs
• DA rapid increase in tax revenue collected by the national tax administration

Under the Angolan agricultural support policy, the government establishes a Minimum Guaranteed Price (Price Floor / Preço Mínimo) for domestic grain producers above the free market equilibrium price. What market outcome occurs if the government does not purchase the resulting output?

• AAn excess supply (surplus) of grain, where farmers produce more than commercial consumers…
• BA severe shortage of grain in all urban distribution centers
• CA complete collapse of total agricultural revenue for all farming households
• DAn automatic reduction of the price to zero values

In the microeconomic theory of the firm, what characterizes the 'Short Run' (Curto Prazo) as opposed to the 'Long Run' (Longo Prazo)?

• AIn the short run, at least one factor of production is fixed (e.g. factory building size)…
• BThe short run is legally defined as exactly 30 calendar days, while the long run is exact…
• CIn the short run, firms make zero accounting profits, while in the long run, all firms be…
• DIn the short run, prices are fixed by law, while in the long run, supply curves are compl…

A textile workshop in Viana incurs Total Fixed Costs (TFC) of 500,000 AOA per month. When it manufactures 1,000 shirts, its Total Variable Costs (TVC) equal 1,500,000 AOA. What are the Total Cost (TC), Average Fixed Cost (AFC), and Average Total Cost (ATC) for 1,000 shirts?

• ATC = 2,000,000 AOA; AFC = 500 AOA/shirt; ATC = 2,000 AOA/shirt
• BTC = 1,000,000 AOA; AFC = 1,500 AOA/shirt; ATC = 1,000 AOA/shirt
• CTC = 2,500,000 AOA; AFC = 250 AOA/shirt; ATC = 2,500 AOA/shirt
• DTC = 1,500,000 AOA; AFC = 500 AOA/shirt; ATC = 1,500 AOA/shirt

A manufacturing firm's Total Cost function is TC = 100 + 20Q + 2Q^2. What is the incremental cost when output expands from 10 to 11 units?

• A62 AOA
• B42 AOA
• C22 AOA
• D100 AOA

What economic phenomenon occurs when a firm doubles all its productive inputs in the long run and its total output increases by more than double, resulting in declining Long-Run Average Cost (LRAC)?

• AEconomies of Scale (Economias de Escala / Rendimentos Crescentes à Escala)
• BDiseconomies of Scale (Deseconomias de Escala)
• CConstant Returns to Scale (Rendimentos Constantes à Escala)
• DThe Law of Diminishing Marginal Returns in the short run

Which of the following sets of conditions uniquely defines a market in Perfect Competition (Concorrência Perfeita)?

• AAtomicity of buyers and sellers, homogeneous product, free entry and exit, perfect inform…
• BA single dominant seller, differentiated products, insurmountable barriers to entry, and…
• CA small number of mutually interdependent firms engaging in aggressive brand advertising…
• DMany small firms producing branded, differentiated goods with full control over market su…

In microeconomic analysis, why does a Pure Monopoly (Monopólio) typically produce less output and charge a higher price than a competitive industry, resulting in a Deadweight Loss (Perda de Eficiência Social)?

• ABecause the monopolist faces a downward-sloping market demand curve and maximizes profit…
• BBecause the monopolist is legally mandated to operate at minimum Average Total Cost
• CBecause the monopolist cannot determine its own selling price and must accept world marke…
• DBecause monopolists are exempt from the law of diminishing returns

What is the defining structural characteristic of an Oligopoly (Oligopólio) market, such as the mobile telecommunications or commercial banking sector in Angola?

• AStrategic mutual interdependence among a small number of dominant firms, where each firm'…
• BComplete absence of barriers to entry allowing thousands of micro-enterprises to enter da…
• CProduction of completely identical agricultural commodities with no branding or advertisi…
• DA market in which one public or private firm supplies the entire industry without strateg…

How does Monopolistic Competition (Concorrência Monopolística) achieve long-run equilibrium for a typical firm?

• AFreedom of entry and exit leads new firms to enter if economic profits exist, shifting ex…
• BFirms form permanent cartels that legally prohibit new competitors from ever entering the…
• CFirms expand production until marginal cost drops to zero, generating infinite economic p…
• DThe State nationalizes all firms and fixes prices strictly at average variable cost

A competitive beverage manufacturer in Bengo sells juice bottles at the market price of P = 500 AOA. The firm's Marginal Cost is given by MC = 100 + 4Q, and its Average Total Cost at the profit-maximizing output is ATC = 380 AOA. What is the firm's profit-maximizing output (Q^*) and its Total Economic Profit (Π)?

• AOptimal Output = 100 units; Total Profit = 12,000 AOA
• BOptimal Output = 125 units; Total Profit = 15,000 AOA
• COptimal Output = 80 units; Total Profit = 9,600 AOA
• DOptimal Output = 150 units; Total Profit = 18,000 AOA

Under what condition should a firm in the short run choose to shut down immediately (encerrar atividade no curto prazo) rather than continue operating at a loss?

• AWhen the market price is strictly less than the minimum Average Variable Cost (P < AVC_mi…
• BWhen the market price is strictly less than Average Total Cost (P < ATC) but greater than…
• CWhenever the firm incurs any positive accounting tax obligation to the state revenue serv…
• DWhen total fixed costs exceed total variable costs in its accounting ledger

What is the standard macroeconomic definition of Gross Domestic Product (Produto Interno Bruto - PIB)?

• AThe total market value of all final goods and services produced within the geographic bor…
• BThe total monetary value of all financial assets and shares traded on the national stock…
• CThe sum total of all foreign currency remittances sent home by citizens living abroad
• DThe total accumulated stock of physical public infrastructure built since national indepe…

What is the relationship between Gross Domestic Product (PIB) and Gross National Product / Gross National Income (PNB / RNB)?

• APNB = PIB + Net Primary Income from the Rest of the World (Rendimentos Primários Líquidos…
• BPNB = PIB minus Total Domestic Household Consumption Expenditure
• CPNB = PIB multiplied by the National Central Bank Currency Reserve Ratio
• DPNB and PIB are strictly identical by definition in all open and closed economies

In national accounting, what distinguishes a 'Gross' macroeconomic aggregate (e.g. PIB, PNB) from a 'Net' aggregate (e.g. PIL, PNL)?

• ANet aggregates subtract Consumption of Fixed Capital / Depreciation (Amortizações/Consumo…
• BNet aggregates subtract all direct income taxes paid by private citizens to the state
• CNet aggregates include informal underground economy estimates, while Gross aggregates exc…
• DGross aggregates are calculated in US Dollars, while Net aggregates are calculated in Kwa…