Examples of Normal Inferior and Giffen Goods
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Complementarity and Demand Theory: from the 1920S to the 1940S Jean-Sébastien Lenfant
Complementarity and Demand Theory: From the 1920s to the 1940s Jean-Sébastien Lenfant To cite this version: Jean-Sébastien Lenfant. Complementarity and Demand Theory: From the 1920s to the 1940s. History of Political Economy, Duke University Press, 2006, 38 (Suppl 1), pp.48 - 85. 10.1215/00182702-2005- 017. hal-01771852 HAL Id: hal-01771852 https://hal.archives-ouvertes.fr/hal-01771852 Submitted on 19 Apr 2018 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Complementarity and Demand Theory: From the 1920s to the 1940s Jean-Sébastien Lenfant The history of consumer demand is often presented as the history of the transformation of the simple Marshallian device into a powerful Hick- sian representation of demand. Once upon a time, it is said, the Marshal- lian “law of demand” encountered the principle of ordinalism and was progressively transformed by it into a beautiful theory of demand with all the attributes of modern science. The story may be recounted in many different ways, introducing small variants and a comparative complex- ity. And in a sense that story would certainly capture much of what hap- pened. But a scholar may also have legitimate reservations about it, because it takes for granted that all the protagonists agreed on the mean- ing of such a thing as ordinalism—and accordingly that they shared the same view as to what demand theory should be. -
Labour Supply
7/30/2009 Chapter 2 Labour Supply McGraw-Hill/Irwin Labor Economics, 4th edition Copyright © 2008 The McGraw-Hill Companies, Inc. All rights reserved. 2- 2 Introduction to Labour Supply • This chapter: The static theory of labour supply (LS), i. e. how workers allocate their time at a point in time, plus some extensions beyond the static model (labour supply over the life cycle; household fertility decisions). • The ‘neoclassical model of labour-leisure choice’. - Basic idea: Individuals seek to maximise well -being by consuming both goods and leisure. Most people have to work to earn money to buy goods. Therefore, there is a trade-off between hours worked and leisure. 1 7/30/2009 2- 3 2.1 Measuring the Labour Force • The US de finit io ns in t his sect io n a re s imila r to t hose in N Z. - However, you have to know the NZ definitions (see, for example, chapter 14 of the New Zealand Official Yearbook 2008, and the explanatory notes in Labour Market Statistics 2008, which were both handed out in class). • Labour Force (LF) = Employed (E) + Unemployed (U). - Any person in the working -age population who is neither employed nor unemployed is “not in the labour force”. - Who counts as ‘employed’? Size of LF does not tell us about “intensity” of work (hours worked) because someone working ONE hour per week counts as employed. - Full-time workers are those working 30 hours or more per week. 2- 4 Measuring the Labour Force • Labor Force Participation Rate: LFPR = LF/P - Fraction of the working-age population P that is in the labour force. -
Chapter 8 8 Slutsky Equation
Chapter 8 Slutsky Equation Effects of a Price Change What happens when a commodity’s price decreases? – Substitution effect: the commodity is relatively cheaper, so consumers substitute it for now relatively more expensive other commodities. Effects of a Price Change – Income effect: the consumer’s budget of $y can purchase more than before, as if the consumer’s income rose, with consequent income effects on quantities demanded. Effects of a Price Change Consumer’s budget is $y. x2 y Original choice p2 x1 Effects of a Price Change Consumer’s budget is $y. x 2 Lower price for commodity 1 y pivots the constraint outwards. p2 x1 Effects of a Price Change Consumer’s budget is $y. x 2 Lower price for commodity 1 y pivots the constraint outwards. p2 Now only $y’ are needed to buy the y' original bundle at the new prices , as if the consumer’s income has p2 increased by $y - $y’. x1 Effects of a Price Change Changes to quantities demanded due to this ‘extra’ income are the income effect of the price change. Effects of a Price Change Slutskyyg discovered that changes to demand from a price change are always the sum of a pure substitution effect and an income effect. Real Income Changes Slutsky asserted that if, at the new pp,rices, – less income is needed to buy the original bundle then “real income ” is increased – more income is needed to buy the original bundle then “real income ” is decreased Real Income Changes x2 Original budget constraint and choice x1 Real Income Changes x2 Original budget constraint and choice New budget constraint -
Unit 4. Consumer Behavior
UNIT 4. CONSUMER BEHAVIOR J. Alberto Molina – J. I. Giménez Nadal UNIT 4. CONSUMER BEHAVIOR 4.1 Consumer equilibrium (Pindyck → 3.3, 3.5 and T.4) Graphical analysis. Analytical solution. 4.2 Individual demand function (Pindyck → 4.1) Derivation of the individual Marshallian demand Properties of the individual Marshallian demand 4.3 Individual demand curves and Engel curves (Pindyck → 4.1) Ordinary demand curves Crossed demand curves Engel curves 4.4 Price and income elasticities (Pindyck → 2.4, 4.1 and 4.3) Price elasticity of demand Crossed price elasticity Income elasticity 4.5 Classification of goods and demands (Pindyck → 2.4, 4.1 and 4.3) APPENDIX: Relation between expenditure and elasticities Unit 4 – Pg. 1 4.1 Consumer equilibrium Consumer equilibrium: • We proceed to analyze how the consumer chooses the quantity to buy of each good or service (market basket), given his/her: – Preferences – Budget constraint • We shall assume that the decision is made rationally: Select the quantities of goods to purchase in order to maximize the satisfaction from consumption given the available budget • We shall conclude that this market basket maximizes the utility function: – The chosen market basket must be the preferred combination of goods or services from all the available baskets and, particularly, – It is on the budget line since we do not consider the possibility of saving money for future consumption and due to the non‐satiation axiom Unit 4 – Pg. 2 4.1 Consumer equilibrium Graphical analysis • The equilibrium is the point where an indifference curve intersects the budget line, with this being the upper frontier of the budget set, which gives the highest utility, that is to say, where the indifference curve is tangent to the budget line q2 * q2 U3 U2 U1 * q1 q1 Unit 4 – Pg. -
Demand Demand and Supply Are the Two Words Most Used in Economics and for Good Reason. Supply and Demand Are the Forces That Make Market Economies Work
LC Economics www.thebusinessguys.ie© Demand Demand and Supply are the two words most used in economics and for good reason. Supply and Demand are the forces that make market economies work. They determine the quan@ty of each good produced and the price that it is sold. If you want to know how an event or policy will affect the economy, you must think first about how it will affect supply and demand. This note introduces the theory of demand. Later we will see that when demand is joined with Supply they form what is known as Market Equilibrium. Market Equilibrium decides the quan@ty and price of each good sold and in turn we see how prices allocate the economy’s scarce resources. The quan@ty demanded of any good is the amount of that good that buyers are willing and able to purchase. The word able is very important. In economics we say that you only demand something at a certain price if you buy the good at that price. If you are willing to pay the price being asked but cannot afford to pay that price, then you don’t demand it. Therefore, when we are trying to measure the level of demand at each price, all we do is add up the total amount that is bought at each price. Effec0ve Demand: refers to the desire for goods and services supported by the necessary purchasing power. So when we are speaking of demand in economics we are referring to effec@ve demand. Before we look further into demand we make ourselves aware of certain economic laws that help explain consumer’s behaviour when buying goods. -
Giffen Behaviour and Asymmetric Substitutability*
Tjalling C. Koopmans Research Institute Tjalling C. Koopmans Research Institute Utrecht School of Economics Utrecht University Janskerkhof 12 3512 BL Utrecht The Netherlands telephone +31 30 253 9800 fax +31 30 253 7373 website www.koopmansinstitute.uu.nl The Tjalling C. Koopmans Institute is the research institute and research school of Utrecht School of Economics. It was founded in 2003, and named after Professor Tjalling C. Koopmans, Dutch-born Nobel Prize laureate in economics of 1975. In the discussion papers series the Koopmans Institute publishes results of ongoing research for early dissemination of research results, and to enhance discussion with colleagues. Please send any comments and suggestions on the Koopmans institute, or this series to [email protected] ontwerp voorblad: WRIK Utrecht How to reach the authors Please direct all correspondence to the first author. Kris De Jaegher Utrecht University Utrecht School of Economics Janskerkhof 12 3512 BL Utrecht The Netherlands. E-mail: [email protected] This paper can be downloaded at: http:// www.uu.nl/rebo/economie/discussionpapers Utrecht School of Economics Tjalling C. Koopmans Research Institute Discussion Paper Series 10-16 Giffen Behaviour and Asymmetric * Substitutability Kris De Jaeghera aUtrecht School of Economics Utrecht University September 2010 Abstract Let a consumer consume two goods, and let good 1 be a Giffen good. Then a well- known necessary condition for such behaviour is that good 1 is an inferior good. This paper shows that an additional necessary for such behaviour is that good 1 is a gross substitute for good 2, and that good 2 is a gross complement to good 1 (strong asymmetric gross substitutability). -
Price Theory – Supply and Demand Lecture
Price Theory Lecture 2: Supply & Demand I. The Basic Notion of Supply & Demand Supply-and-demand is a model for understanding the determination of the price of quantity of a good sold on the market. The explanation works by looking at two different groups – buyers and sellers – and asking how they interact. II. Types of Competition The supply-and-demand model relies on a high degree of competition, meaning that there are enough buyers and sellers in the market for bidding to take place. Buyers bid against each other and thereby raise the price, while sellers bid against each other and thereby lower the price. The equilibrium is a point at which all the bidding has been done; nobody has an incentive to offer higher prices or accept lower prices. Perfect competition exists when there are so many buyers and sellers that no single buyer or seller can unilaterally affect the price on the market. Imperfect competition exists when a single buyer or seller has the power to influence the price on the market. The supply-and-demand model applies most accurately when there is perfect competition. This is an abstraction, because no market is actually perfectly competitive, but the supply-and-demand framework still provides a good approximation for what is happening much of the time. III. The Concept of Demand Used in the vernacular to mean almost any kind of wish or desire or need. But to an economist, demand refers to both willingness and ability to pay. Quantity demanded (Qd) is the total amount of a good that buyers would choose to purchase under given conditions. -
1. Consider the Following Preferences Over Three Goods: �~� �~� �~� � ≽ �
1. Consider the following preferences over three goods: �~� �~� �~� � ≽ � a. Are these preferences complete? Yes, we have relationship defined between x and y, y and z, and x and z. b. Are these preferences transitive? Yes, if �~� then � ≽ �. If �~� then � ≽ �. If �~� then �~� and � ≽ �. Thus the preferences are transitive. c. Are these preferences reflexive? No, we would need � ≽ � � ≽ � 2. Write a series of preference relations over x, y, and z that are reflexive and complete, but not transitive. � ≽ � � ≽ � � ≽ � � ≽ � � ≽ � � ≻ � We know this is not transitive if � ≽ � and � ≽ � then � ≽ �. But � ≻ �, which would contradict transitivity. 3. Illustrate graphically a set of indifference curves where x is a neutral good and y is a good that the person likes: We know that this person finds x to be a neutral good because adding more x while keeping y constant (such as moving from bundle A to D, or from B to E), the person is indifferent between the new bundle with more x and the old bundle with less x. We know this person likes y because adding more y while keeping x constant (such as moving from bundle A to B, or from D to E), the person is strictly prefers the new bundle with more y than the old bundle with less y. 4. Draw the contour map for a set of preferences when x and y are perfect substitutes. Are these well-behaved? Explain why or why not. We know these are perfect substitutes because they are linear (the MRS is constant) We know they are strictly monotonic because adding Y while keeping X constant (moving from bundle A to bundle B), leads to a strictly preferred bundle (� ≻ �). -
Chapter 4 Individual and Market Demand
Chapter 4: Individual and Market Demand CHAPTER 4 INDIVIDUAL AND MARKET DEMAND EXERCISES 1. The ACME corporation determines that at current prices the demand for its computer chips has a price elasticity of -2 in the short run, while the price elasticity for its disk drives is -1. a. If the corporation decides to raise the price of both products by 10 percent, what will happen to its sales? To its sales revenue? We know the formula for the elasticity of demand is: %DQ E = . P %DP For computer chips, EP = -2, so a 10 percent increase in price will reduce the quantity sold by 20 percent. For disk drives, EP = -1, so a 10 percent increase in price will reduce sales by 10 percent. Sales revenue is equal to price times quantity sold. Let TR1 = P1Q1 be revenue before the price change and TR2 = P2Q2 be revenue after the price change. For computer chips: DTRcc = P2Q2 - P1Q1 DTRcc = (1.1P1 )(0.8Q1 ) - P1Q1 = -0.12P1Q1, or a 12 percent decline. For disk drives: DTRdd = P2Q2 - P1Q1 DTRdd = (1.1P1 )(0.9Q1 ) - P1Q1 = -0.01P1Q1, or a 1 percent decline. Therefore, sales revenue from computer chips decreases substantially, -12 percent, while the sales revenue from disk drives is almost unchanged, -1 percent. Note that at the point on the demand curve where demand is unit elastic, total revenue is maximized. b. Can you tell from the available information which product will generate the most revenue for the firm? If yes, why? If not, what additional information would you need? No. -
An Analysis of the Supply of Open Government Data
future internet Article An Analysis of the Supply of Open Government Data Alan Ponce 1,* and Raul Alberto Ponce Rodriguez 2 1 Institute of Engineering and Technology, Autonomous University of Cd Juarez (UACJ), Cd Juárez 32315, Mexico 2 Institute of Social Sciences and Administration, Autonomous University of Cd Juarez (UACJ), Cd Juárez 32315, Mexico; [email protected] * Correspondence: [email protected] Received: 17 September 2020; Accepted: 26 October 2020; Published: 29 October 2020 Abstract: An index of the release of open government data, published in 2016 by the Open Knowledge Foundation, shows that there is significant variability in the country’s supply of this public good. What explains these cross-country differences? Adopting an interdisciplinary approach based on data science and economic theory, we developed the following research workflow. First, we gather, clean, and merge different datasets released by institutions such as the Open Knowledge Foundation, World Bank, United Nations, World Economic Forum, Transparency International, Economist Intelligence Unit, and International Telecommunication Union. Then, we conduct feature extraction and variable selection founded on economic domain knowledge. Next, we perform several linear regression models, testing whether cross-country differences in the supply of open government data can be explained by differences in the country’s economic, social, and institutional structures. Our analysis provides evidence that the country’s civil liberties, government transparency, quality of democracy, efficiency of government intervention, economies of scale in the provision of public goods, and the size of the economy are statistically significant to explain the cross-country differences in the supply of open government data. Our analysis also suggests that political participation, sociodemographic characteristics, and demographic and global income distribution dummies do not help to explain the country’s supply of open government data. -
The Law of Demand Versus Diminishing Marginal Utility
University of California, Berkeley Department of Agricultural & Resource Economics CUDARE Working Papers Year 2005 Paper 959R The law of demand versus diminishing marginal utility Bruce R. Beattie and Jeffrey T. LaFrance Copyright © 2005 by author(s). DEPARTMENT OF AGRICULTURAL AND RESOURCE ECONOMICS DIVISION OF AGRICULTURE AND NATURAL RESOURCES UNIVERSITY OF CALIFORNIA AT BERKELEY Working Paper No. 959 (Revised) THE LAW OF DEMAND VERSUS DIMINISHING MARGINAL UTILITY by Bruce R. Beattie and Jeffrey T. LaFrance In Press: Review of Agricultural Economics (September 2005) Copyright © 2005 by the authors. All rights reserved. Readers may make verbatim copies of this document for noncommercial purposes by any means, provided that this copyright notice appears on all such copies. California Agricultural Experiment Station Giannini Foundation of Agricultural Economics September, 2005 THE LAW OF DEMAND VERSUS DIMINISHING MARGINAL UTILITY Bruce R. Beattie and Jeffrey T. LaFrance Abstract Diminishing marginal utility is neither necessary nor sufficient for downward sloping demand. Yet upper-division undergraduate and beginning graduate students often presume otherwise. This paper provides two simple counter examples that can be used to help students understand that the Law of Demand does not depend on diminishing marginal utility. The examples are accompanied with the geometry and basic mathematics of the utility functions and the implied ordinary/Marshallian demands. Key Words: Convex preferences, Diminishing marginal utility, Downward sloping demand JEL Classification: A22 • Bruce R. Beattie is a professor in the Department of Agricultural and Resource Economics at The University of Arizona. • Jeffrey T. LaFrance is a professor in the Department of Agricultural and Resource Economics and a member of the Giannini Foundation of Agricultural Economics at the University of California, Berkeley. -
1 Economics 100A: Microeconomic Analysis Fall 2001 Problem Set 4
Economics 100A: Microeconomic Analysis Fall 2001 Problem Set 4 (Due the week of September 24) Answers 1. An inferior good is defined as one of which an individual demands less when his or her income rises and more when his or her income falls. A normal good is defined as one of which an individual demands more when his or her income increases and less when his or her income falls. A luxury good is defined as one for which its demand increases by a greater proportion than income. A necessary is defined as one for which its demand increases by a lesser proportion than income. The same good can be both normal and inferior. For instance, a good can be normal up to some level of income beyond which it becomes inferior. Such a good would have a backward-bending Engel curve. 2. (a) Table 2. Percentage Allocation of Family Budget Income Groups A B C D E Food Prepared at Home 26.1 21.5 20.8 18.6 13.0 Food Away from Home 3.8 4.7 4.1 5.2 6.1 Housing 35.1 30.0 29.2 27.6 29.6 Clothing 6.7 9.0 9.8 11.2 12.3 Transportation 7.8 14.3 16.0 16.5 14.4 (b) All of them. (c) Food away from home, clothing and transportation. (d) Food prepared at home and housing. (e) The graph below depicts the Engel curve for food away from home (a luxury good). (f) The graph below depicts the Engel curve for food prepared at home (a necessity good).