Causes & Consequences of Deflation (Cambridge (CIE) O Level Economics)

Revision Note

Steve Vorster

Written by: Steve Vorster

Reviewed by: Jenna Quinn

Demand-side Deflation

  • Deflation occurs when there is a fall in the average price level of goods/services in an economy as measured by the consumer price index (CPI)

    • Deflation only occurs when the percentage change in prices falls below zero % 

  • Deflation can be caused by either demand-side or supply-side factors

    • The two different causes of deflation have very different consequences for the economy 

Demand-side deflation (bad deflation) 

  • Demand-side deflation is caused by a fall in total (aggregate) demand in the economy

  • Total (aggregate) demand is the sum of all expenditure in the economy as measured by the real gross domestic product (rGDP)

    • rGDP = Consumption (C) + Investment (I) + Government spending (G) + Net Exports (X-M)

  • If any of the four components of rGDP decrease, there will possibly be a decrease in the total demand in the economy leading to a decrease in the general price level

    • Demand-side deflation has occurred

The Consequences of Demand-side Deflation

Unemployment

Consumers Lose Confidence

Debt

  • With a decrease in output, fewer workers are required and so unemployment increases

  • With falling output and rising unemployment, households lose confidence choosing to save instead of spend

  • Consumption falls and rGDP reduces even more

  • Debt feels more burdensome as the value of any debt is worth more

  • Real cost of borrowing increase as real interest rates rise when the price level falls e.g. if interest rates are 1.5% and the inflation rate is –1.5%, then the real interest rate is 3%

Firms Lose Confidence

Bankruptcies 

Exports

  • Falling output and falling prices cause firms to lose confidence and so they delay investment, further reducing rGDP

  • Falling output and falling prices reduce the profits of firms

  • Some firms will be unable to continue and will go out of business

  • Persistently falling prices can prove attractive to foreigners and the level of exports may increase (this helps offset some of the reduction in rGDP)

Supply-side Deflation

  • Supply-side deflation is caused by increases in the productive capacity of the economy

    • This is brought about by any increase in the quantity/quality of the factors of production

    • It effectively creates a condition of excess supply in the economy

    • General price levels fall

    • National output (rGDP) increases 
       

The Consequences of Supply-side Deflation

Unemployment

Consumers Gain Confidence

Debt

  • With a decrease in costs, the output of firms increases

  • More workers are required and so unemployment falls

  • With rising output and falling price levels, households become more confident and consumption increasing - increasing rGDP even more

  • Debt still feels more burdensome as the value of any debt is worth more  

Firms Gain Confidence

Exports 


  • Rising output and falling costs of production cause firms to gain confidence and increase investment, thereby increasing rGDP

  • Persistently falling prices boosts international competitiveness and exports increase

 

Examiner Tips and Tricks

Falling prices caused by a recession are not good for an economy. In this scenario, national output is falling which means that fewer workers will be required to produce goods/services so unemployment will increase.

Falling prices caused by an increase in supply are good for an economy. In this scenario, national output is rising which means that more workers will be required to produce goods/services so unemployment will decrease.

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Steve Vorster

Author: Steve Vorster

Expertise: Economics & Business Subject Lead

Steve has taught A Level, GCSE, IGCSE Business and Economics - as well as IBDP Economics and Business Management. He is an IBDP Examiner and IGCSE textbook author. His students regularly achieve 90-100% in their final exams. Steve has been the Assistant Head of Sixth Form for a school in Devon, and Head of Economics at the world's largest International school in Singapore. He loves to create resources which speed up student learning and are easily accessible by all.

Jenna Quinn

Author: Jenna Quinn

Expertise: Head of New Subjects

Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.