Microeconomics Models and Theories

Microeconomics is concerned with the economic decisions and actions of individuals and firms. Within the broad church of microeconomics, there are different theories that emphasise certain assumptions and expectations of economic behaviour. The most important theory is neo-classical theory, which places emphasis on free-markets and the assumption individuals are rational and seek to maximise utility. …

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Causes of business cycle

causes-business-cycle

The business or trade cycle relates to the volatility of economic growth, and the different periods the economy goes through (e.g. boom and bust). There are many different factors that cause the economic cycle – such as interest rates, confidence, the credit cycle and the multiplier effect. Some economists also point to supply side explanations, …

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Dynamic Efficiency

dynamic-efficiency

Definition of Dynamic Efficiency Dynamic efficiency is concerned with the productive efficiency of a firm over a period of time. A firm which is dynamically efficient will be reducing its cost curves by implementing new production processes. Dynamic efficiency will enable a reduction in both SRAC and LRAC. Diagram showing dynamic efficiency Therefore dynamic efficiency …

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The impact of a falling exchange rate

effect-of-devaluation-flow

A look at the economic impact of a fall in the exchange rate (termed depreciation or devaluation)  A fall in the exchange rate is known as a depreciation in the exchange rate (or devaluation in a fixed exchange rate system). It means the currency is worth less compared to other countries. When there is a …

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Policies to reduce a current account deficit

A current account deficit occurs when the value of imports (of goods/services/inv. incomes) is greater than the value of exports. Policies to reduce a current account deficit involve: Devaluation of exchange rate (make exports cheaper – imports more expensive) Reduce domestic consumption and spending on imports (e.g. tight fiscal policy/higher taxes) Supply side policies to …

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The Natural Rate of Unemployment

NAIRU-natural-rate

Definition: The natural rate of unemployment is the rate of unemployment when the labour market is in equilibrium. It is unemployment caused by structural (supply-side) factors. (e.g. mismatched skills) Diagram showing the natural rate of unemployment The natural rate of unemployment is the difference between those who would like a job at the current wage …

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Profit Maximisation

profit-maximisation

An assumption in classical economics is that firms seek to maximise profits. Profit = Total Revenue (TR) – Total Costs (TC). Therefore, profit maximisation occurs at the biggest gap between total revenue and total costs. A firm can maximise profits if it produces at an output where marginal revenue (MR) = marginal cost (MC) Diagram …

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Macroeconomic objectives and conflicts

macroeconomic-objectives

A look at the main macroeconomic objectives (economic growth, inflation and unemployment, government borrowing) and possible conflicts between these different macro-economic objectives. The main macro-economic objectives Economic growth – positive and sustainable growth (The UK, long-run trend rate is around 2.5%) Low inflation (UK target 2% +/-1) – Low unemployment / Full employment (e.g. around …

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