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Scientist
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Try to understand the world
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Policy Advisors
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Try to improve the world
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A Model
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An abstraction, a simplified version of reality, easy to comprehend, makes accurate predictions, built on assumptions. ACCURATE PREDICTIONS ARE THE TEST OF A MODEL.
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Economist
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Formulate Assumptions.
Assumptions simplify the world
Economist use model to study economic issues
Assumptions simplify the world
Economist use model to study economic issues
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Ceteris Paribus
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All other factors remain unchanged (Holding something constant)
Every decision made is by holding something constant
Every decision made is by holding something constant
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Adam Smith
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Father of Modern economics
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Exports
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Produced domestically and sold abroad
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Imports
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Produced abroad and sold domestically
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Absolute Advantage
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The ability to produce a good using fewer inputs than other producer.
(Producing a ton of wheat uses 10 labor hours in the US vs. 25hrs in Japan.) ( the US has an absolute advantage.
(Producing a ton of wheat uses 10 labor hours in the US vs. 25hrs in Japan.) ( the US has an absolute advantage.
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Comparative Advantage
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the ability to produce a good at a lower opportunity cost than another producer
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Consumption Goods
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Used up in less than a year
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Scarcity
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Limited resources
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Scarce resources
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Factors of production
Land, Labor, Capital, Entrepreneurship, Technology
Land, Labor, Capital, Entrepreneurship, Technology
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Interdependence
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One fo the principles of economics:
1. Trade can make everyone better off.
1. Trade can make everyone better off.
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The Production Possibilities Frontier (PPF):
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A graph that shows the combinations of two goods the economy can possibly produce given the available resources and the available technology.
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Two measures of the cost of a good
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Two countries can gain from trade when each specializes in the good it produces at lowest cost.
Absolute advantage measures the cost of a good in terms of the inputs required to produce it.
Recall: Another measure of cost is opportunity cost.
Absolute advantage measures the cost of a good in terms of the inputs required to produce it.
Recall: Another measure of cost is opportunity cost.
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product market
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the market in which households purchase the goods and services that firms produce
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factor market
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market in which firms purchase the factors of production from households
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circular flow diagram
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a visual model of the economy that shows how dollars flow through markets among households and firms
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Suppose that Charles, an economist from a research institute in Texas, and Dina, an economist from a school of industrial relations, are arguing over government bailouts. The following dialogue shows an excerpt from their debate:
Dina: Thanks to recent financial crises, the concept of bailouts is a hot topic for debate among everyone these days.
Charles: Indeed, it's gotten crazy! A government bailout of severely distressed financial firms is unnecessary because free markets will properly price assets.
Dina: I don't know about that. Without a bailout of severely distressed financial firms, the economy will experience a deep recessi
Dina: Thanks to recent financial crises, the concept of bailouts is a hot topic for debate among everyone these days.
Charles: Indeed, it's gotten crazy! A government bailout of severely distressed financial firms is unnecessary because free markets will properly price assets.
Dina: I don't know about that. Without a bailout of severely distressed financial firms, the economy will experience a deep recessi
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There are two main reasons that economists tend to disagree: differences in values and differences in scientific judgments. In this case, the economists disagree due to differences in scientific judgments because they disagree about a factual matter: the type of policy needed to keep the economy functioning smoothly during a period of financial distress. In contrast, disagreement due to differences in values reflect differing assessments on fairness or equity.
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Despite their differences, with which proposition are two economists chosen at random most likely to agree
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While many economic questions are open to debate, the field is largely in agreement on some points. For example, two economists chosen at random are most likely to agree that tariffs and import quotas generally reduce economic welfare. Indeed, one survey that 93% of economists agree with this proposition. It would be harder to find two randomly chosen economists who both agree with either of the other propositions.
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Microeconomics
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is the study of how prices and quantities are determined through interactions between buyers and sellers (individuals and firms) in individual markets. Therefore, microeconomists are more likely to create models to analyze the decisions of firms (such as pricing) and those of consumers (such as shopping choices), as well as how government policies affect those decisions.
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Macroeconomics
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is the study of factors that affect the entire economy. Therefore, macroeconomists tend to create models to analyze how aggregate phenomena such as growth, inflation, and unemployment respond to policy decisions of governments and central banks, changes in aggregate spending or savings, and supply or demand shocks.
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The effect of government regulation on a monopolist's production decisions
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MICRO
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The effect of a large government budget deficit on the economy's price level
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MACRO
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A consumer's optimal choice when buying a flat-screen TV
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MICRO
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Based on this model, households earn income when firms purchase factors in factor markets
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In the circular-flow model of an economy, households own all the factors of production. Households earn their income when firms purchase or rent these factors of production to use them to produce goods and services. Firms, in turn, earn revenue when households buy goods and services.
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Which of the following is true regarding this economic model?
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While simple, the circular-flow diagram can still be useful for the purposes of modeling how dollars and resources move throughout an economy
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Based on this model, firms earn revenue whenhouseholds purchasegoods and services in product markets.
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The shape of Japan's production possibilities frontier (PPF) should reflect the fact that as Japan produces more cars and fewer trucks, the opportunity cost of producing each additional car remains constant .
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Suppose Japan produces only trucks and cars. The resources that are used in the production of these two goods are not specialized—that is, the same set of resources is equally useful in producing both cars and trucks.
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The shape of Bulgaria's production possibilities frontier (PPF) should reflect the fact that as Bulgaria produces more tablets and fewer cars, the opportunity cost of producing each additional tabletincreases .
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Suppose Bulgaria produces only cars and tablets. The resources that are used in the production of these two goods are specialized—that is, some resources are more suitable for producing cars than tablets, whereas others are more suitable for producing tablets than cars.
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