Business Economics

Consumer Equilibrium through Indifference Curve

What is the indifference curve approach? And tell the Consumer equilibrium through the Indifference Curve Analysis.

Meaning of Indifference curve:- An indifference curve is that line of points which shows different combinations of two commodities which yield equal satisfaction to the consumer.

Definition

According to the leftwich:- “A single indifference curve shows the different combinations of X and Y two commodities that yield equal satisfaction for the consumer and he/she doesn’t want to change in his situation”.

In other words:- The combination Each of points on the price line of the indifference curve represents equal satisfaction to the consumer on the indifference curve for two commodities. Consumer Equilibrium through Indifference Curve

Consumer’s Equilibrium Through Indifference Curve Analysis

Every consumer would like to get maximum satisfaction out of his given expenditure. A consumer may find out his position with the help of indifference curve as to how much he should spend his limited income on the different goods so that he may get maximum satisfaction.

In other words:- Consumer’s equilibrium refers to that situation in which he is not willing to make any change on expenditure with his given income and given prices.

Assumption
  1. Prices of the goods are constant.
  2. Income of consumers is also constant.
  3. Consumers know the price of all things.
  4. Consumers can spend his income in small quantities.
  5. Market contains perfect competition.
  6. Goods are classify as divisible.
CONSUMER’S EQUILIBRIUM

The consumer’s equilibrium is found at the tangent of the price line and a convex on the indifference curve. Consumer Equilibrium through Indifference Curve

Two Main Conditions Of Consumer’s Equilibrium are

  • Price line should be tangent to indifference curve on price line
  • Indifference curve should be convex to the point of origin.

Price line should be tangent to indifference curve on price line.

  1. AB is a price line.
  2. IC1, IC2, IC3 are indifference curves.
  3. A consumer can buy any of the combination, C, D and E apple and Oranges shown on the price line AB.
  4. He can’t get any combination on IC3 as it is away from price line AB.
  5. He can buy combinations of those goods which are only on the price line AB for getting maximum equal satisfaction.
  6. Out of C, D and E combinations, the consumer will be in equilibrium at combination D ( 2 Apple + 4 Oranges ) because at this point the price line ( AB ) is tangent to the highest indifference curve IC2.
  7. The consumer can also buy C or E combinations as well but these will not give him maximum satisfaction being situated on lower indifference curve IC1.
  8. It means the consumer’s equilibrium is a point that tangent on the price line and of the indifference curve.

B) Indifference curve must be convex to the origin

It is the second condition of equilibrium that represents the indifference curve must be convex to the point of origin. It means that the marginal rate of substitution of good X for good Y should be diminishing. If there is a point of consumer equilibrium of consumer, the indifference curve will be concave and not convex to the origin, then it will not be a permanent position of equilibrium. Consumer Equilibrium through Indifference Curve

  • AB is a price line.
  • IC is an indifference curve.
  • At point ‘E’ the marginal rate of substitution and price ratio of apples and oranges are equal. But point E is not a permanent equilibrium point because at this point, the marginal rate of substitution increases instead of diminishing.
  • In other words, at point E, the indifference curve is concave to its point of origin ‘O’ so it is a violation of the second condition of equilibrium. Consumer Equilibrium through Indifference Curve
  • So permanent equilibrium will not be permanent at point E.
  • Thus, the consumer is in equilibrium at point E1 on IC1 indifference Curve.
  • At point E1, Price line AB is tangent to IC1 Curve. Which is convex to the points of origin on the indifference curve.

Conclusion:- Thus, as per the above analyst consumer can be in equilibrium in the two conditions, when price line should be tangent to the indifference curve and Indifference curve must be convex to the origin. Consumer Equilibrium through Indifference Curve. You can download the syllabus of Business Economics on the official website of Gndu.

In summary, indifference curve analysis provides a more realistic and refined approach to understanding consumer behavior Compared to utility cardinal measurement, emphasizing preferences, trade-offs, and rational decision-making.  Consumer Equilibrium through Indifference Curve

Important questions of Business Economics of BCom-lI sem

Law of Diminishing Marginal Utility 

Assumption and Exception of Marginal Utility 

Consumer Equilibrium through Indifference Curve

Assumption of marginal utility analysis

Tell the Assumption and Exception of Marginal Utility.

Definition of utility:- Want Satisfying power of a good is called utility. It denotes a quality in a commodity or service by virtue of which our wants are satisfied.

According to Hibbdon, “Utility is the quality of a good that satisfies a want”.

Meaning of Marginal Utility

Meaning of Marginal Utility:- The change that takes place in the total utility by the consumption of an additional unit of a commodity is called marginal utility.

For Example:- By consumption of the first cup of tea you get 15 units of utility and by the consumption of the second cup of tea your total utility goes up to 25 units. It means, the consumption of a second cup of tea has added 10 units = 25-15 of utility to the total utility. So here the difference of 10 units of utility of consumption is called marginal utility.

Definition of Marginal Utility:- “Marginal utility is the addition made to the total utility in consumption by consuming one more unit of commodity and that difference lies in the previous and successive unit of a consumption.” is called marginal utility.

Assumptions of Marginal Utility Theory

The theory of marginal utility, particularly the Law of Diminishing Marginal Utility, is based on several key assumptions:

  1. Rational Consumer: The consumer acts rationally and aims to maximize total utility within their budget.
  2. Cardinal Measurement of Utility: Utility can be measured in numerical units (utils), making comparisons possible.
  3. Constant Marginal Utility of Money: The purchasing power of money remains constant throughout the consumption process.
  4. Independent Utility of Goods: The utility derived from one good does not affect the utility of another.
  5. Homogeneous Units of Consumption: Each unit of the good consumed is identical in size, quality, and utility.
  6. Continuous Consumption: Consumption occurs without long breaks to ensure consistency in utility measurement.
  7. Reasonable Consumption Range: The law applies only within a normal range of consumption and does not hold for extreme cases like addiction or necessities.

These assumptions provide the foundation for marginal utility analysis, helping explain consumer behavior and decision-making in economics. Assumption of marginal utility analysis 

Exceptions to the Law of Diminishing Marginal Utility

While the Law of Diminishing Marginal Utility states that additional consumption of a good reduces its extra satisfaction, there are several exceptions where this may not hold:

  1. Hobbies and Collectibles: Items like stamps, rare coins, and art may provide increasing satisfaction as a collection grows.
  2. Addictive Goods: Products like alcohol, drugs, or gambling may create increasing utility due to psychological dependence.
  3. Knowledge and Education: Gaining more knowledge often leads to greater interest and satisfaction rather than diminishing utility.
  4. Money: Many argue that utility from money does not diminish significantly, as higher income can offer more choices and security. Assumption of marginal utility analysis 
  5. Prestige or Status Goods (Veblen Goods): Luxury brands and designer items may increase in desirability as consumption rises, contradicting the law.
  6. Rare or Unique Experiences: Traveling to exotic locations or experiencing new adventures may provide continuous or increasing satisfaction. Assumption of marginal utility analysis 
  7. Initial Lack of Appreciation: Sometimes, individuals need time to develop a taste for certain goods, such as classical music or fine wine, leading to increasing utility over time. Assumption of marginal utility analysis 

These exceptions highlight cases where consumer behavior deviates from the traditional marginal utility theory, often influenced by psychological, social, or economic factors. Assumption of marginal utility analysis. You can check the syllabus of Business Economics on the official website of Gndu.

Conclusion of Marginal Utility

The concept of marginal utility explains how consumer satisfaction changes with each additional unit of a good or service consumed. It follows the Law of Diminishing Marginal Utility, which states that as consumption increases, the additional satisfaction (marginal utility) derived from each extra unit gradually decreases.

Most Important Question of Marginal Utility 

Law of Diminishing Marginal Utility.

Assumption of marginal utility analysis

Measures of price elasticity of demand

Meaning of Price Elasticity

Price elasticity of demand denotes the ratio at which the demand contracts with the rise in price and extends with a fall in price. So there is an inverse relationship between price and demand of a good. Price elasticity of demand is represented with the minus (–) Sign. It can be understand with the help of following formula.

Example :- Rise in price by 10 percent is followed by a decrease in demand by 20 percent. Measures of price elasticity of demand 

Definition of Price Elasticity of Demand

By Dr. Marshall, “Elasticity of demand is defined as the percentage change in the quantity demanded divided by the percentage change in the price”. Measures of price elasticity of demand 

Degrees of Price Elasticity of Demand

Price elasticity of demand is for all goods, at different prices are not always the same for always. It may be more or less. So in economics, the study of the concept of elasticity of demand is divided into five degrees. Which are the following.

(1). Perfectly Elastic

(2). Perfectly Inelastic

(3). Unit Elastic

(4). More than unit Elastic

(5). Less than unit Elastic

(1). Perfectly Elastic Demand:- A perfectly elastic demand is that due to which a little change in price will cause an infinite change in demand. As a little price rise causes demand to fall in demand to zero and a little fall in price causes an infinite demand for goods. So under Perfect Competition, the demand curve of firms is perfectly elastic. Measures of price elasticity of demand 

DD Represents a perfectly elastic demand curve. As it is parallel to the OX- axis. As if prices rise a little from 4 to 5 then demand goes on zero. And at the same price 4 a consumer can buy 10 units or 30 units as many units as he desires.

(2). Perfectly Inelastic Demand:- A perfectly inelastic demand is one which a change in price causes no change in demand is called inelastic demand. Such a type of demand is concerned with the essential things of life such as salt, sugar, clothes and flour. Measures of price elasticity of demand 

When price is 0 to 2, 0 to 4 and 0 to 6 but demand remains constant at all prices is called perfectly inelastic demand. Measures of price elasticity of demand 

(3). Unitary Elastic Demand:- Unitary Elastic demand is that which shows an equal percentage change in demand with the same percent change in price of a good is called unitary Elastic Demand. Example- A 10% change in price rise of a good then the same 10% of the demand will decline of the same good whose demand rises. And Reverse this. Measures of price elasticity of demand 

In the graph we can see that price goes up OT to OP then at the same time demand declines ON to OM at the same percentage 10%.

(4). Greater than Unitary Elastic:- It is a demand in which a greater change in demand caused a less price decline. Example if price falls 5% then demand increases by 20% and reverse this. In other words if the price rises a little but compared to it demand will decline more percentage as compared to rise price. Measures of price elasticity of demand 

As we see in the graph that price goes down from OP to OT by 5%. But Demand goes up by 20% is called the Greater than Unitary elastic demand.

(5). Less than Unitary Elastic demand:- it is that demand of goods which percentage demand responses less than the price more is called Less than Unitary Elastic demand. Example:- When price falls by 5 percent accompanied by 3 percent extends a demand of a good. Measures of price elasticity of demand 

When price falls more than a percentage than demand goes on it is called less than unitary demand. Measures of price elasticity of demand 

Measurement of Price Elasticity of Demand

There are five methods of measurement of price elasticity of demand. Which are as.

  1. Total Expenditure Method
  2. Proportionate Method
  3. Point Elasticity Method
  4. Arc Elasticity Method
  5. Revenue Method

(1). Total Expenditure Method:- This method was developed by Dr. Marshall. This method tells us how much and in what direction the total expenditure has changed as a result of a change in the price of a good. This method shows us three stages of expenditure due to the change in price as follows.

  • Unity Elasticity Demand:- When the total expenditure remains constant due to the fall or rise in the price of a good.
  • Greater than Unity Elastic Demand:- When total expenditure rises due to the price fall. And total expenditure goes down due to the price rise of a good.
  • Less than a Unity Elastic Demand:- When total expenditure goes down due to the fall in price of a good. And reverse Total expenditure goes up due to the rise in price of a good.

Now, we can understand this total expenditure with the change in price with the following example.

Elasticity of Demand

Price

Total Expenditure

Unity

Rise

Fall

Unchanged

Unchanged

Greater than Unity

Rise

Fall

Down

Up

Less than Unity

Rise

Fall

Up

Down

(2). Proportionate Method:- This is the second method of price elasticity method. Which shows proportionate change in demand is divided by the proportionate change in price. This can be understood with the following formula.

Ed= (-) Proportionate change in demand for good -x

Proportionate change in price of a good -x

(3). Point Elasticity Method:- This method can be measured with the help of demand curve. Which shows change in demand with the changes in price change. As at every point of price it shows different demand. So such changes of price denote different demands of the same good for which price has been changed. All these points are different prices as well as different demand due to the change in price level of the same good.

Example throughout the graph we can understand as at point A, price elasticity of demand where op is a price and oq is a quantity demanded. Another point C, where Op1 is the price for the same good and OQ1 is a quantity demanded for the same good. Measures of price elasticity of demand 

(4). Arc Elasticity:- arc elasticity method can be used when a little change occurs in price as well as little change in demand. It can be understood with the following graph arc.

  • There are three as A, B and C demand points on the demand curve.
  • When we see points A and B where the price OP and Demand at OQ on the point A of Demand Curve.
  • But when price falls a little from OP to OP1 in results of which demand also rises a little by OQ to OQ1.
  • And the same occurred on the point C, where we can see when Price rises from the OP2 to OP1 then demand falls a little from OQ2 to OQ1.
  • So we find in the graph the Arc between the two points as A and C.

So, Price elasticity of demand of an arc is called arc Elasticity of Demand.

(5). Revenue Method

This is the fifth method of price elasticity of method. Revenue is earned by the firm by selling its products. Assume that a firm sells 10 products and the firm gets 50 rupee as a revenue. This is called total revenue of the firm as 50 rupees. When we divide total revenue by the number of total sold units we get the average revenue. When we divide 50 rupees by 10 units of products, we get the average here =5. Measures of price elasticity of demand 

If firms sell 11 products and total revenue goes up with the firm as 55. Now we can find the marginal revenue is 55-50 = 5.

Marginal Revenue = 5

So the price of elasticity under the Revenue Method is measured with the help of Marginal revenue. Measures of price elasticity of demand 

Revenue has been shown on OY -axis and quantity demanded on OX-axis. AB is average revenue and Demand Curve and AN is marginal Revenue Curve. At point P on (Average Revenue) demand Curve. You can check the syllabus of Business Economics on the  official website Gndu.

Conclusion:-

Price elasticity of demand (PED) is a crucial concept in economics that measures how the quantity demanded of a good or service responds to changes in its price. Goods with elastic demand experience significant changes in quantity demanded when prices fluctuate, while inelastic goods show little responsiveness to price changes. Measures of price elasticity of demand 

Understanding price elasticity helps businesses and policymakers make informed decisions regarding pricing strategies, taxation, and revenue generation. Firms can use this concept to maximize profits by adjusting prices based on consumer sensitivity, while governments can predict the impact of taxes on goods and services.

In conclusion, price elasticity of demand is an essential tool for analyzing market behavior. It provides insights into consumer purchasing patterns, assists in strategic decision-making, and helps in predicting the economic impact of price changes on different products and industries. Measures of price elasticity of demand 

Important other questions of Business Economics

Law of Diminishing Utility 

Assumption and Exception of Diminishing Utility 

Equilibrium of consumer under Indifference Curve 

Measures of price elasticity of demand