[경제학기본3] 경제학 짱박사의 경제학원론 기본강의_3장 수요,공급 그리고 시장의균형(1)

This video is a lecture by Professors Lee Jun-gu and Lee Chang-yong on Chapter 3 of Principles of Economics, explaining supply, demand, and market equilibrium. Key points include: Demand Demand represents how much a consumer is willing to buy at a given price [00:10]. Generally, as prices fall, quantity demanded increases, a phenomenon known as the law of demand [01:46]. The demand curve represents the relationship between price and quantity demanded and is generally downward sloping [01:58]. Quantity demanded is measured as the flow (volume) over a specific period [03:38]. The height of the demand curve represents the amount consumers are willing to pay, or marginal benefit [05:44]. A shift along the demand curve represents a change in quantity demanded due to a change in the price of the product. A shift along the demand curve itself represents a change in demand due to changes in factors other than price (such as income or the price of related goods [07:23]). The demand curve for the entire market can be calculated by horizontally summing the demand curves of individual consumers [10:37]. Elasticity of Demand Elasticity of demand represents the sensitivity of quantity demanded to price changes [12:18]. Price elasticity of demand is calculated as the ratio of the percent change in quantity demanded to the percent change in price [13:18]. A higher price elasticity of demand indicates a more sensitive response to price changes, while a lower price elasticity indicates a less sensitive response [12:54]. Price elasticity of demand varies depending on the nature of the product (necessity vs. luxury), the availability of substitutes, the consumer's share of income, and the consideration period [27:20]. Income elasticity of demand represents the sensitivity of quantity demanded to changes in income and is used to distinguish between normal goods (increasing demand as income increases) and inferior goods (increasing demand as income increases) [32:40]. Cross-demand elasticity of demand measures the effect a price change of one good has on the quantity demanded of another good, and is used to identify the relationship between substitutes (positive value) and complements (negative value) [36:29]. Supply Supply represents how much a producer is willing to sell for a given price [40:37]. Generally, as price increases, quantity supplied increases, a phenomenon known as the law of supply [40:46]. The supply curve represents the relationship between price and quantity supplied and is generally upward sloping [40:55]. The height of the supply curve represents the minimum amount a producer is willing to receive, or cost [41:12]. The quantity supplied is affected not only by the price of the good itself, but also by factors such as the prices of factors of production and the level of technology [43:53]. The supply curve for the entire market can be obtained by horizontally summing the supply curves of individual producers [45:35]. Elasticity of Supply Elasticity of supply measures the sensitivity of quantity supplied to price changes [47:27]. Price elasticity of supply is calculated as the ratio of the change in quantity supplied to the change in price [47:38]. Price elasticity of supply varies depending on factors such as the change in cost due to changes in output, the ease of switching between factors of production, and the consideration period [49:39]. This lecture explains the basic concepts of supply and demand, elasticity, and how to derive market-wide demand and supply curves. ===================================================================================================== Sample lectures for lectures 1-5, and from lecture 6 onward, are for members of the Jjang Doctor Economics Level Membership. Join the channel to enjoy the benefits.    / @sunkujang   #Economics #Economics #LeeJoonGoo