Labor economists have extensively researched the determinants of earnings. Invest-ment in human capital, measured in years of education, and on the job training aresome of the most important explanatory variables in this research. You decide toapply earnings functions to the field of sports economics by finding the determinantsfor baseball pitcher salaries. You collect data on 455 pitchers for the 1998 baseballseason and estimate the following equation using OLS and heteroskedasticitv-robust standard errors:
Ln (Eami) = 12.45 + 0.052 x Years + 0.00089 x Innings + 0.0032 x Saves
(0.08) (0.026) (0.00020) (0.0018)
- 0.0085 x ERA, R^2 = 0.45, SER = 0.874
(0.0168)
where Earn is annual salary in dollars, Years is number of years in the major leagues, Innings is number of innings pitched during the career before the 1998 season, Saves is number of saves during the career before the 1998 season, and ERA is the earned run average before the 1998 season.
A) What happens to earnings when the pitcher stays in the league for one additional year? Compare the salaries of two relievers, one with 10 more saves than the other. What effect does pitching 100 more innings have on the salary' of the pitcher? What effect does reducing his ERA by 1.5? Do the signs correspond to your expectations? Explain.
B) Are the individual coefficients statistically significant? Indicate the level of significance you used and the type of alternative hypothesis you considered.
C) Although you are quite impressed with the fit of the regression, someone suggests that you should include the square of years and innings as additional explanatory variables. Your results change as follows:
Ln (Eami) = 12.15 + 0.160 x Years + 0.000268 x Innings + 0.0063 x Saves
(0.05) (0.039) (0.00030) (0.0010)
-0.0584 x ERA - 0.0165 x Years - 0.00000045 x Innings
(0.0165) (0.0026) (0.00000012)
R^2 = 0.69, SER = 0.666
What is her reasoning? Are the coefficients of the quadratic terms statistically significant? Are they meaningful?
D) Calculate the effect of moving from two to three years, as opposed to from 12 to 13 years.
E) You also decide to test the specification for stability across leagues (National League and American League) by including a dummy variable for the National League and allowing the intercept and all slopes to differ. The resulting F-statistic for restricting all coefficients that involve the National League dummy variable to zero, is 0.40. Compare this to the relevant critical value from the table and decide whether or not these additional variables should be included.

Answer:

Kindly check explanation for other solutions

Years, Inning and saves are statistically significant ; ERA is not.

Step-by-step explanation:

Earning for staying one additional year :

Multiply slope value of years * 1 = 0.052 * 1 * 100 % = 5.2% (earning increases by 5.2%)

Relives with 10 more saves :

10 * 0.0032 * 100% = 3.2% (earning increases by 3.2%)

Having 100 more innings :

100 * 0.00089 * 100% = 8.9%

If ERA is reduced by 1.5 ; earning will increase by (0.0085*100)% * 1.5 = 1.275%

B.) At 5% level of confidence :

α = 1.64

Years = 0.052/0.026=2

Inning = 0.00089/0.00020 = 4.45

Saves = 0.0032/0.0018 = 1.78

ERA = 0.0085/0.0168 = 0.51

Years, Inning and saves are statistically significant as they are greater than α ; As for ERA, it is not statistically significant (0.51 < 1.64)

Last year, your salary was $33,975. This year, your boss tells you your salary will be $34,960. What percent raise (change) did you receive? Round your answer to the nearest tenth of a percent.

Hey guy good morning How are you today can you please help me with my number seven question please I will mark you brainly ?

PRETTY PLS HELPPPP!/ Kyle has a storage box that is 2 ft. long, 3 ft. high, and has a volume of 12 ft. 3 . Myla has a storage box that is 4 ft. high, 2 ft. long, and has a volume of 16 ft. 3 . What are the widths of Kyle and Myla's boxes? Explain how you know.

Is it a cylinder or a sphere?

Candice bought 3 shirts. Each shirt cost the same amount and was discounted by $3.66.
Candice paid a total of $62.31 before tax. How much did each shirt cost before the discount?
А $19.55
B
$20.77
С
$24.43
D
$28.09

The sum of 10 and hans savings is 49. Use the variable h to represent Hans savings.

8 players shared 3 bottles of water equally. what fraction did each player get?

Answer y + 7 = 18 show your work

Elijah bought a new car for $25,000. He paid
$5,000 up front and then $600 per month. How
many months will it take Elijah to pay off the car?

Mr.Nolan paid $36.95 for each adult shirt and $23.95 for each youth shirt he bought.Mr.Nolan bought 2 adult shirts and 5 youth shirts.

Help. Please and a few others are

Coin Calculation plz help

PLS HELP!!
PLSSSSSSSSSSSSSSS!!!!!

You roll a die twice. What is the probability of rolling a number greater than 1 and then rolling a 6?​

is this a reflection over the x-axis, y-axis, or neither? ​

Alternate exterior angles ​

Write an expression for " x divided by nine".

Please help!!

10 POINTS

20
Select the correct answer.
Jane planted a marigold sapling in her garden and recorded its growth every week. The plant's height, in inches, is modeled by the function hig),
where x is the number of weeks since Jane planted the sapling.

Is 0.36279979176191 rational or irrational

What is the area of this trapezoid?

If x2 = 10, what is the value of x? O I/10 O120 05 O +20​

After 1 year, $1,000 deposited in a savings account with simple interest had earned $30 in interest. What was the interest rate?

You brought a $5 gift card and 5 stuffed animals. You spent a total of $30. How much did each stuffed animal cost

which is typically true regarding loan repayments A. The higher interest rate you receive the lower the total repayment. B. The quicker you pay off the loan to lower the total repayment. C. The quicker you pay off the loan the higher the total repayment. D. The time you take to pay off the loan does not affect the total amount of repayment.

180 divided by 280 is equal to?​

Evaluate the expression [(18 ÷ 2 + 54 ÷ 9) × 2] × 2.
PLEASE EXPLAIN I KNOW ITS 60

there are 16 students working on a project if each student need 1/4 stick of clay are needed in all?

question 3 and 4
- 10 points

Bailey is comparing two squares. The first square has an area of 144 cm2, and the second square has an area of 81 cm2. What is the difference in the side lengths of the two squares?

Look at the figure below.



Choose all the names that describe the figure.

A. square
B. rhombus
C. rectangle
D. trapezoid

E. quadrilateral
F.parallelogram