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Oksana_A [137]
3 years ago
5

A natural experiment is a chance occurrence that mimics a randomized controlled trial. In order to analyze causal effects from n

atural experiments, economists make use of a statistical method known as instrumental variables, in which one variable from a natural experiment is used as an instrument for a particular independent variable of interest. Assume the independent variable of interest is x1 and the dependent variable in a regression is y. Which of the following represent necessary characteristics of a suitable instrument?
a. The instrument has at least 200 observations
b. The instrument is correlated with
c. The instrument has a conditional mean of zero
d. The instrument does not directly influence y, except through
Business
1 answer:
babymother [125]3 years ago
4 0

Answer: b. The instrument is correlated with x1.

d. The instrument does not directly influence y, except through x1.

Explanation:

Based on the information given in the question, the necessary characteristics of a suitable instrument include:

• The instrument is correlated with x1.

• The instrument does not directly influence y, except through x1.

Some of the criteria for an instrument variable are the fact that it should have a causal effect on independent variable and also the dependent variable isn't directly affected except through the independent variable which is x1 in this scenario.

Therefore, the correct option are B and D.

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The market for corn in Brazil has a large number of sellers and there is no difference in the products sold by each seller. As t
LenaWriter [7]

Answer:

Option (b) is correct.

Explanation:

In a market condition of pure competition, there are large number of buyers and sellers of the product. The sellers in this market condition are behaving like a price taker.

If a single firm wants to increase the price of the product then as a result the demand for their product is reduced or become zero.

There are some characterstics of the firms under pure competition market condition:

(i) They are selling homogeneous products.

(ii) Price taker firms

(iii) Large no. of buyers and sellers

 

8 0
3 years ago
Lauren makes $150 a day as a bank clerk. she takes two days off work without pay to fly to another city to attend the concert of
Juli2301 [7.4K]
The two days Lauren doesn't receive pay would be $150 × 2 = $300
Add on the cost of transportation & lodging: $300 + $250 = $550
Finally, add the cost of the concert ticket: $550 + $50 = $600

The opportunity cost of Lauren's decision to attend the concert is $600.
8 0
3 years ago
Chuck offers $240,000 for a house. The seller turns down the offer but says she will sell the house for $260,000. However, Chuck
qaws [65]

Answer:

Chuck must be less than $260,000

Explanation:

The economic decision rule is: Do it if that marginal benefit exceeds the marginal cost and Since Chuck was unwilling to purchase the house at $260,000, we can deduce that the marginal benefit of purchasing the house must be less than $260,000 due to the fact that the seller turns down the offer but says she will sell the house for $260,000.

6 0
3 years ago
The CFO of company ABC wants to give every employee a 3% raise, but would like a report to confirm if this is possible. Write an
katrin [286]

Answer:

For such a report , the sql query required would be:

SELECT emp_id, curr_salary, curr_salary*1.03 AS inc_salary FROM Employee;

Explanation:

For such a report , the sql query required would be:

SELECT emp_id, curr_salary, curr_salary*1.03 AS inc_salary FROM Employee;

In the above  sql query  employee id is emp_id , curr_salary is the current salary column.  "curr_salary*1.03" is been made because an increment of 3% means salary + salary*3% , that is , salary*1.03.

4 0
3 years ago
If conversion costs are added evenly throughout the production process and the unit have made it 50% of the way through the prod
mestny [16]

Answer: C. 50%

Explanation:

From the above question, If conversion costs are added evenly throughout the production process and the unit have made it 50% of the way through the production process then the percentage completion for conversion costs is 50%

3 0
3 years ago
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