Inflation and the cost of living
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Para educadores: diapositivas de la lección, apuntes de repaso listos para usar sobre Inflation and the cost of living (Economics, The National Economy) — úsalos en tu lección, o presenta el tema como una actividad interactiva de clase que tus aprendices juegan como un juego en vivo.
Apuntes de la lección
What is inflation?
- Inflation is a sustained rise in the general price level, not every individual price. Disinflation is a falling inflation rate: +8% to +2% still means prices rise, just more slowly. Deflation is a sustained decline in the general price level; one discounted product is insufficient.
- Fictional annual index 100 to 108 gives 8% inflation, then to 110.16 gives 2%. A later 2% fall gives 107.9568. Prices remain above the initial level despite later deflation. Distinguish percentage changes from index-point changes and levels from rates.
Fictional price levels and inflation
Measuring inflation
- CPI combines consumer-price changes with expenditure weights reflecting aggregate spending patterns. ONS updates basket coverage and weights; the official methodology is more detailed than a classroom fixed-basket example. A household’s own spending pattern can give a different experience.
- Annual index growth is (new index − old index)/old index × 100. From 120 to 126, inflation is 5%, not six percent. The UK government-set policy target is 2% CPI inflation, separate from observed inflation. CPIH additionally includes owner-occupier housing costs and Council Tax; the measures are not interchangeable.
Measure the change correctly
Causes
- Demand-pull pressure occurs when spending grows faster than available capacity can support. Cost-push pressure can arise from relevant unit-cost increases or reduced supply, depending on pass-through, productivity, margins and demand. A one-off relative-price shock differs from persistent acceleration.
- Imported inflation can reflect foreign price rises or depreciation raising domestic-currency import costs, with invoice currency, contracts and hedging affecting timing. Wage-price feedback is possible when wages, prices and expectations reinforce each other, but a single wage increase does not prove a spiral.
Distinguish inflation pressures
Consequences
- Unindexed money incomes and cash balances lose purchasing power when relevant prices rise faster than income or returns. Indexed incomes and different asset returns change the result. Firms may face uncertainty or menu costs; export competitiveness depends on relative inflation and exchange-rate conditions.
- Unexpected inflation can lower the real burden of a fixed nominal debt, but variable rates, indexation, income losses and higher living costs may offset this. Borrowers can lose overall, and savers or pensioners are not uniform groups. Assess each stated income, asset, liability and contract rather than assigning every group one inevitable outcome.
Assess the stated position
Controlling inflation
- Demand restraint through higher relevant interest rates or fiscal measures can ease inflation pressure with lags and conditions. It can also reduce activity and employment. Monetary policy does not directly create more energy or repair lost supply, although it can affect spending and expectations.
- Feasible supply improvements may reduce costs or expand capacity but take time and resources. Consider persistence, credibility, distribution and trade-offs. Low predictable positive inflation can reduce deflation risk and aid adjustment; it is not a fixed price level. Lower inflation alone does not mean earlier high prices reverse.
Policy must address the mechanism
Real vs nominal
- Nominal amounts use current money terms. Real comparisons adjust for the relevant price measure and period: real growth factor = nominal growth factor / price growth factor. Wage +3% with prices +5% gives 1.03/1.05 − 1 ≈ −1.90%, despite a higher nominal wage.
- A deposit paying 1% nominal with relevant inflation 4% has real return 1.01/1.04 − 1 ≈ −2.88% before any tax or fees. Subtracting the percentages gives an approximation, not the exact finite ratio. Personal spending patterns can differ from the selected index.
Fictional real-value calculations
A two-item fixed-basket calculation
- Fictional quantities remain 10 food units and 5 energy units. Initial prices £2 and £4 give costs £20 plus £20 = £40. New prices £2.20 and £5 give costs £22 plus £25 = £47. Basket inflation = 7/40 × 100 = 17.5%.
- Each category had half the initial spending weight. Food prices rise 10% and energy 25%, so the base-weighted change is 0.5 × 10% + 0.5 × 25% = 17.5%. The official CPI uses broader coverage, updates and detailed aggregation methods; this is an original simplified example.
Fictional fixed basket
Household cost-of-living comparisons
- Aggregate consumer inflation does not describe every household’s exact price exposure. Spending shares, location, contractual costs and access to substitutes differ. A larger share spent on fast-rising essentials can increase the household’s price pressure.
- Judge living-standard effects alongside disposable income, indexed or unindexed receipts, debt rates and fixed commitments over the same period. Inflation can fall while affordability remains difficult because the price level is still high relative to resources.
Compare household exposure
Diapositivas
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Preguntas de práctica
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1.What is the CPI?
Easy- Athe Consumer Prices Index
- BCentral Price Indicator
- CConsumer Profit Index
- DCost Payment Index
2.What is deflation?
Easy- Aa rise in prices
- Ba rise in output
- Ca fall in output
- Da sustained fall in the general price level
3.What CPI inflation target does the UK government set for the monetary-policy framework?
Easy- A5%
- B10%
- C2%
- D0%
4.What is demand-pull inflation?
Easy- Ano change
- Bprice pressure when aggregate spending grows faster than available capacity
- Cprices rise due to costs
- Dprices fall
5.What is cost-push inflation?
Easy- Aprice pressure from higher relevant production costs or reduced supply
- Bdemand rises
- Csupply rises
- Dprices fall
6.Which could cause cost-push inflation?
Easy- Aa rise in consumer spending
- Ba fall in taxes
- Clower interest rates
- Da rise in oil prices
7.Which could cause demand-pull inflation?
Easy- Aa rise in wages in a single firm
- Ba rise in energy costs
- Clower interest rates boosting spending
- Da rise in raw material costs
8.What is imported inflation?
Easy- Ano inflation
- Binflation caused by higher import prices
- Cinflation from domestic wages
- Ddeflation
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