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Topics; marginal revenue, elasticity, indifference curve, consumer surplus & producer surplus, equilibrium market, short run adjustment and long run adjustment,own price elasticity of demand, income elasticity of demand, cross-price elasticity of demand, elastic part and inelastic parts, unit elastic, substitute & complements,consumer choice, rational consumer, ranking principle, more is better principle, choose the best available bundles.
Learn:
1. Own price elasticity on demand; if elasticity is less than minus 1, it is elastic which means price sensitive when price is increase, demand is decresed, market renuve is decrese, and if elasticity is more than minus 1, it is inelastic which means price insensitive, when price is increase, the demand is decrease market revenue is increase, if elasticity is minus 1, which means unit elastic and market revenue is constant no change,
2. Income elasticity on demand if the elasticity is more than 0, which means when income increase, the demand is increased, the product is normal good, furthermore if elasticity is more than 1, the good is luxuries good, otherwise the good is necessaires. if the elasticity is less than 0, which means when income increase, the demand is decreased, the product is inferior goods.
3. Cross price goods; if the elasticity is more than 0, which means the increase of product A price trigger the demand of B increase; if elasticity is less than 0, which means the increase of product A price leads to the demand of Product B decrease,
4. revenue equals price times quantity. Marginal revenue equals the change of revenue divided by demand ( X axis)