Circular flow of income: two-sector model

Correct answer: A. The balance between leakage and injection may remain

Explanation: In a simple two-sector economy, saving is a leakage from the spending stream because it is not immediately spent on currently produced consumption goods. Investment is an injection because it adds expenditure to the circular flow. If saving and investment both increase by the same amount, the additional leakage can be matched by the additional injection, so the balance between leakages and injections may remain intact, assuming other conditions are unchanged.

Correct answer: B. Pressure of falling sales

Explanation: When household income is constant, a higher saving ratio means that a smaller proportion of that income is used for current consumption. Since household consumption is an important source of firms’ sales in a two-sector economy, reduced consumption expenditure can lower aggregate demand for firms’ goods. Consequently, firms may face pressure from falling sales, although the final outcome can also depend on investment expenditure.

Correct answer: A. Sales fall, then output falls, then demand for factor services falls

Explanation: A decline in firms’ sales indicates weaker demand for their output. If this weakness persists, firms may reduce production to avoid unsold inventories. Lower planned production reduces the need for labour, land, capital and entrepreneurial services, so firms’ demand in the factor market may decline. This is the relevant transmission sequence in the simple two-sector model.

Correct answer: A. Factor income falls, then purchasing power falls, then consumption demand falls

Explanation: Factor income consists of wages, rent, interest and profit received by households for supplying factor services. When this income falls, household purchasing power generally decreases. Households may then reduce their consumption expenditure, which lowers demand for goods and services in the product market. Thus, the sequence in option A correctly explains the transmission from the factor market to the product market.

Correct answer: A. The net effect of the investment injection and the fall in consumption

Explanation: Investment is an injection into the circular flow because it creates additional expenditure on capital goods and production capacity. A fall in household consumption is a reduction in spending and therefore works in the opposite direction. The overall change in demand and income cannot be determined without comparing their magnitudes. It will depend on the net effect of the increase in investment and the decrease in consumption.

Correct answer: A. The relationship between saving and investment

Explanation: In the basic two-sector model, households save part of their income and firms undertake investment expenditure. Introducing a financial market shows how household saving can be channelled to firms, directly linking the leakage of saving with the injection of investment. This permits analysis of the saving-investment relationship and the conditions required for equilibrium in the circular flow.

Correct answer: B. Factor market

Explanation: The factor market is where households supply the services of land, labour, capital and entrepreneurship to firms. Firms demand these services and pay wages, rent, interest and profit in return. Therefore, the opposite movements of factor services and factor payments specifically identify the factor market, not the product market.

Correct answer: B. Product market

Explanation: The product market is the market in which firms sell final goods and services to households. Households purchase these products by making consumption expenditure, while firms receive the corresponding revenue. Thus, goods moving to households and consumption spending moving to firms represent the two sides of the product market.

Correct answer: A. Firms' output generates factor income, and household income is spent on products

Explanation: In the simplified two-sector economy, firms produce goods and services by using factor services supplied by households. Payments for those services become household income. Households then spend that income on firms’ output, creating firms’ sales revenue. This circular process explains the equality of output, income and expenditure when measured consistently.

Correct answer: A. The normal relationship between output and income

Explanation: In the basic two-sector model, firms’ production uses factor services and generates factor payments to households. These payments constitute household factor income. Therefore, a rise in output normally has to be consistent with a corresponding movement in income. If output increases but factor payments do not, measurement, timing, classification or an omitted income flow should be checked.

Correct answer: A. Another expenditure source or investment has been included

Explanation: In a model containing only household consumption and firms’ sales of consumer goods, household consumption expenditure should correspond to firms’ receipts from those sales. If total receipts are larger, the diagram may also include firms’ investment expenditure or another spending source. Taxes, imports and a breakdown of real flow do not follow necessarily from the stated information.

Correct answer: A. The two sides of the same monetary flow appear unequal

Explanation: In the two-sector circular flow, firms’ payments for factor services are the same income received by households. Wages, rent, interest and profit paid by firms become factor income for households. Therefore, unequal amounts indicate a possible error in measurement, timing, classification or omitted information. The difference does not by itself prove that the government or foreign sector is involved.

Correct answer: A. Factor services from households to firms and goods from firms to households

Explanation: Real flows consist of physical factor services and physical goods or services, rather than money payments. Households supply labour, land, capital and entrepreneurial services to firms, while firms supply produced goods and services to households. These two opposite movements together form both directions of real flow in the simple two-sector model.

Correct answer: B. Factor payments from firms to households and consumption expenditure from households to firms

Explanation: Money flow refers to payments made in monetary terms. Firms pay households for factor services through wages, rent, interest and profit. Households then pay firms for goods and services through consumption expenditure. These two opposite monetary movements are the complete money flow in the simple two-sector model, whereas the other options mainly describe real or foreign-sector flows.

Correct answer: A. Households may have saved more

Explanation: Household income is divided between consumption and saving. If income rises but households save the additional income instead of spending it on firms’ goods and services, consumption expenditure may remain unchanged. Consequently, firms’ sales need not increase immediately. Saving is therefore a valid explanation within an extended two-sector flow that includes household saving.

Correct answer: A. Whether firms actually increased output and factor demand

Explanation: Higher sales receipts do not automatically prove that domestic factor income has risen at the same moment. Sales may reflect inventory sales, previously produced goods, price changes or output produced without a proportional increase in factor use. The first analytical step is therefore to check whether firms actually increased current production and demand for household-supplied factors.

Correct answer: A. The flow is explained between households and firms without including the foreign sector

Explanation: The basic two-sector model contains only households and firms. Households supply factor services to firms and receive wages, rent, interest and profit; they then spend income on firms’ final goods and services. Since government and foreign transactions are excluded, the circular flow is self-contained and closed within these two sectors. Therefore, option A is correct.

Correct answer: A. Identify them as transactions outside the basic two-sector flow

Explanation: The basic two-sector model includes only households and firms and normally excludes the government and foreign sectors. Taxes and government purchases are government-sector transactions, while exports are transactions with the foreign sector. They may be relevant in a broader three-sector or open-economy model, but they must be identified separately when analysing the basic two-sector flow. Hence, option A is correct.

Correct answer: A. Demand for products

Explanation: Factor services such as labour, land, capital and entrepreneurship are used by firms to produce goods and services. Firms demand these inputs because consumers demand the resulting products. Thus, the demand for factor services is derived demand: it depends on the demand for the final goods and services that the factors help produce. Therefore, option A is correct.

Correct answer: A. Households’ factor income

Explanation: Households earn factor income by supplying labour, land, capital and entrepreneurship to firms. This income gives them purchasing power, which they use to buy final goods and services produced by firms. Consequently, household factor income supports product demand and also helps complete the circular flow of money between households and firms. Hence, option A is correct.

Correct answer: A. The flow of factor payments

Explanation: In the two-sector model, households supply factor services to firms, and firms pay wages, rent, interest and profit in return. If firms require fewer factor services, the direct payment made to households for those services may decline. Household consumption could also be affected later through lower income, but the immediate and direct flow weakened is factor payments. Taxes and exports are outside the basic two-sector model. Therefore, option A is correct.

Correct answer: A. The continuity of the circular money flow

Explanation: When households buy firms’ products, the firms receive sales revenue. In the normal circular flow, firms use this revenue to pay households for factor services, creating household income that supports further consumption. If the revenue does not return as factor payments, the connection between product-market receipts and factor income is interrupted. Thus, continuity of the circular money flow is disturbed. Option A is correct.

Correct answer: A. Consumption expenditure from households to firms

Explanation: Household income is the purchasing power used to buy goods and services from firms. If households choose not to consume, their consumption expenditure falls, and firms receive less revenue from product sales. This may later reduce production and related factor payments, but the flow directly weakened by the stated decision is consumption expenditure from households to firms. Hence, option A is correct.

Correct answer: A. Factor services create output; output creates income; income creates consumption expenditure

Explanation: The two-sector circular flow links households and firms through real and monetary transactions. Households provide factor services, firms use them to produce output, and payments for those services generate household income. Households then spend income on firms’ goods and services, creating consumption expenditure and sales revenue. This connected sequence is represented by option A.

Correct answer: A. The real exchange of goods and factor services

Explanation: The money flow records monetary payments such as wages, rent, interest, profit, and consumption expenditure. However, it does not by itself show the physical movement of factor services from households to firms or goods and services from firms to households. Therefore, analysis of the real flow remains incomplete. Option A is correct.