EC-0005 Lecture Notes - Lecture 2: Time Series, Dependent And Independent Variables, Natural Experiment

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28 Jan 2018

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The scientific method is the name for the ongoing process that economists and other scientists use to: develop models of the world, evaluate those models by testing them with data. Models and data: a model is a simplified description of reality, scientific models are used to make predictions that can be checked with empirical evidence. Empirical evidence - consists of facts that are obtained through observation and measurement: also called data. Hypotheses- are predictions (typically generated by a model) that can be tested with data. The mean - the sum of all the different values divided by the number of values. Median - this value is calculated by ordering the number from least to greatest and then finding the value half-way through the list. Causation - occurs when one thing directly affects another. Correlation - means that two variables tend to change at the same time. Positive correlation - implies that two variables tend to movie in the same direction.

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1. Scarcity in economics means: we do not have sufficient resources to produce all the goods and services we want. the wants of people are limited. there must be poor people in rich countries. shortages exist in nearly all markets. You like to read Vogue and Sports Illustrated. You have only $5 to spend, so you only buy Sports Illustrated. The statement that best represents this economic concept is: resources are scarce. the real cost of something is what you must give up to get it. positive economics explains how the economy actually works. economic models are used to answer âwhat ifâ questions. . If the state government allocates additional spending on education, the opportunity cost is: zero. the dollar amount of the additional spending. considered only if additional taxes need to be raised to fund the spending. measured in terms of the best alternative use for that money. For a student that owns his or her own home and doesn't plan to live in the dorm the cost of going to college is: tuition and the cost of housing. tuition, the cost of housing, and the cost of books. tuition, the cost of books, and forgone income. forgone income only. Keynesian economics stressed: the importance of total spending. the self-correcting power of free markets. the long run. that the Depression should run its course to bring down the high cost of living. The economic policy that uses changes in government spending and taxes to affect the overall spending in the economy is known as: a tax-and-spend policy. monetary policy. fiscal policy. free-trade policy. When building a model, economists: simplify reality in order to highlight what really matters. attempt to duplicate reality in all of its complexity. ignore the facts and instead try to determine what the facts should be. are careful to avoid the scientific method. Which is a normative statement? The minimum wage has not kept pace with inflation. The minimum wage is an important tool in fighting poverty and should be increased. The minimum wage can create higher unemployment for teens and unskilled workers. A higher minimum wage is expected to increase the price of a fast-food cheeseburger. Which is an example of a positive statement? The poverty rate should be 4%. A high rate of economic growth is a more important economic goal than a low rate of unemployment. The federal government pays for 46% of U.S. health care costs. Everyone in the country should be covered by national health insurance. Economists may disagree about policies because they: may approach the issue using the same sets of values. may use different economic models. enjoy disagreeing with each other. only consider issues in positive economics.

Can you solve them and tell me if youre sure 100% 100% 100%

Question 1 (1 point)

If two variables move together but are otherwise unrelated, we have

Question 1 options:

a fallacy of composition.

an econometric model.

a spurious correlation.

an efficiency problem.

evidence of a weak correlation but strong causation.

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Question 2 (1 point)

The Latin expression "ceteris paribus": is essential in ______.

Question 2 options:

collecting data.

identifying sunk costs.

evaluating theories.

recognizing scarcity.

developing spurious relationships.

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Question 3 (1 point)

Opportunity cost is best defined as

Question 3 options:

marginal cost minus marginal benefit.

the time spent on an economic activity.

the value of the best forgone alternative.

the monetary cost of an economic decision.

marginal cost plus marginal benefit.

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Question 4 (1 point)

A cost that cannot be recovered at the time a decision is being made is termed a(n)

Question 4 options:

marginal cost.

scarcity cost.

sunk cost.

average cost.

opportunity cost.

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Question 5 (1 point)

If the marginal costs of 1, 2, and 3 hours of talking on the phone are $50, $75, and $105, then the total costs are

Question 5 options:

$50, $150, and $315.

$50, $41.67, and $115.

$50, 125, and $230.

$50, $175, and $405.

impossible to calculate with information given.

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Question 6 (1 point)

In general, individuals should specialize in producing those goods for which they

Question 6 options:

can produce more quickly than others.

can produce less quickly than others.

have the lowest opportunity cost compared to others.

have the highest opportunity cost compared to others.

have an average opportunity cost.

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Question 7 (1 point)

The extra benefit that comes from an extra unit of activity is called the _________ of the activity.

Question 7 options:

benefit

marginal benefit

marginal cost

average benefit

reservation benefit

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Question 8 (1 point)

The marginal benefit of an activity is the

Question 8 options:

same as the total benefits of the activity.

total benefit divided by the level of the activity.

change in the activity divided by the change in benefits.

extra benefit associated with an extra unit of the activity.

total benefit divided by the change in the level of the activity.

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Question 9 (1 point)

The fundamental problem that is studied in economics is that

Question 9 options:

consumers have limited wants in the face of unlimited resources.

markets should function without government interference.

Canada is too wealthy.

consumers have unlimited wants in the face of limited resources.

there are unlimited resources.

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Question 10 (1 point)

The range of topics, or issues, that fit within the definition of economics is

Question 10 options:

limited to market activities, e.g., buying soap.

limited to individuals and firms.

extremely wide, requiring only the ideas of choice and scarcity.

limited to governments and nations.

very limited.

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Question 11 (1 point)

When economists make predictions using the framework of a given economic model, it is usually based on

Question 11 options:

personal experiences.

important relationships between particular variables.

mathematical abstractions.

political implications.

the profit-maximizing objective.

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Question 12 (1 point)

The cost of spending an evening partying instead of studying economics is

Question 12 options:

the resulting decrease in the test score in Economics.

the time spent at the party.

the score of the test.

the cost of the textbook.

university tuition.

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Question 13 (1 point)

As one progresses from a one-person economy to a large, multi-person economy, the shape of production possibilities curve changes from

Question 13 options:

downward sloping to upwards sloping.

linear to convex (bowed into the origin).

concave (bowed out from the origin) to linear.

convex (bowed into the origin) to concave (bowed out from the origin).

linear to concave (bowed out from the origin).

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Question 14 (1 point)

Which is NOT a sunk cost?

Question 14 options:

Monthly rent of $1,000 contractually specified in a one-year lease.

An insurance premium of $50 per year, paid last month.

An attorney's retainer of $50,000 per year.

A worker's wage of $15 per hour.

A non-refundable deposit for a tender.

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Question 15 (1 point)

"We should support government intervention because the market produces undesirable outcomes" is an example of

Question 15 options:

positive economics.

normative economics.

comparative economics.

negative economics.

formative economics.

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EC-0005 Lecture Notes - Lecture 2: Time Series, Dependent And Independent Variables, Natural Experiment

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