2023 - JAMB Economics Past Questions and Answers - page 2

If commodities X and Y are substitutes, their cross elasticity of demand will be positive. Substitutes are goods that can be used in place of each other. When the price of one substitute (e.g., X) increases, the demand for the other substitute (e.g., Y) tends to increase as consumers shift their preference. As a result, the cross elasticity of demand is positive.

Buying Treasury securities from commercial banks is an example of expansionary monetary policy. When a central bank, like the Central Bank of Nigeria, buys Treasury securities, it injects money into the banking system. This increase in the money supply can lead to lower interest rates, increased lending, and stimulate economic activity. 

Lowering income taxes, increasing the discount rate, and increasing the reserve ratio are typically associated with contractionary monetary policies to reduce the money supply and cool down an overheated economy.

Macroeconomics focuses on the following units in an aggregative manner: household, firms, government, corporate sector, and external sector.

Macroeconomics looks at the overall performance and behaviour of the entire economy by examining aggregate variables such as GDP, unemployment rate, inflation rate, and overall economic output. 

Overpopulation is often caused by low literacy rates. Low levels of education and literacy can contribute to high birth rates because of a lack of awareness and access to family planning methods. This, in turn, can lead to overpopulation.

While factors such as emigration, disease, war and conflicts can impact population dynamics, low literacy rates are a key factor contributing to overpopulation by influencing family planning and awareness.

A persistent rise in the prices of inputs will lead to cost-push inflation. Cost-push inflation occurs when the cost of production increases, leading producers to raise prices to maintain their profit margins.

If the prices of inputs such as labour, raw materials, or energy consistently rise, businesses may pass on these increased costs to consumers in the form of higher prices for goods and services. This is a key characteristic of cost-push inflation.

In the context of exchange rates, depreciation refers to a decrease in the value of a domestic currency relative to a foreign currency. So, when the price of the domestic currency falls in terms of a foreign currency, it is referred to as depreciation.

The multiplier is a measure of the ratio of the change in an endogenous variable (such as output or income) to the change in an exogenous variable (such as autonomous spending).

The multiplier concept is often used in economics to analyze the effects of changes in spending on the overall economy.

When an individual's money income increases while prices remain constant, they have the ability to purchase more goods and services. This increase in purchasing power is represented by an outward shift of the budget line on a graph, indicating that more combinations of goods and services are now affordable.

So, an increase in money income with constant prices results in an outward shift in the budget line.

The Authority of Heads of State and Government is the highest body in the Economic Community of West African States (ECOWAS) organogram. This body consists of the heads of state and government of the member countries and is responsible for making decisions on major issues within the organization.

The quantity of a commodity that a consumer is willing and able to buy at a particular time is referred to as "demand." Demand is a fundamental concept in economics, representing the desire, willingness, and ability of consumers to purchase a certain quantity of a good or service at a given price and during a specific period.