Assignment 3 2025
Unique #:
Due Date: 13 August 2025
Detailed solutions, explanations, workings
and references.
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, 1. INTRODUCTION
Understanding why unemployment can persist even when people are willing to work
is a key question in economics. One important explanation comes from Keynesian
economics, which argues that involuntary unemployment can happen when wages
and prices do not adjust quickly enough to changes in economic conditions. This
condition is known as wage and price rigidity. In simple terms, it means that wages
and prices can remain stuck, even when the economy needs them to change. This
can cause mismatches in the labor market, where people want to work but
employers are not hiring.
This essay explores the idea that wage and price rigidities are necessary for
Keynesian economics to explain why involuntary unemployment exists. It begins with
a look at Keynes’s original theory, then examines the orthodox Keynesian school,
and finally considers the contributions of New Keynesian economics. The goal is to
explain how these different schools of thought understand wage and price rigidity
and how it relates to real-world unemployment.
2. CONCEPT OF WAGE AND PRICE RIGIDITY
2.1. Understanding Wage Rigidity
Wage rigidity means that wages do not adjust quickly when there are changes in the
economy. One major form is downward wage rigidity, where it is hard for employers
to reduce wages even when demand for labour falls. This happens for many
reasons. Workers do not like pay cuts and may resist through strikes or quitting.
Labour unions also play a role by negotiating fixed wages in contracts. Government
rules like minimum wage laws can stop wages from falling below a certain level.
Social norms and fairness also matter, as employers fear losing morale and
productivity if they cut pay.
2.2. Understanding Price Rigidity
Price rigidity means that the prices of goods and services do not change quickly in
response to changes in supply and demand. One reason is menu costs, which are
the costs of changing prices, like printing new menus or re-labelling products. Firms
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