代写计量经济学导论 Econ 107代写 econometrics代写

Introductory econometrics – Econ 107

45 points

代写计量经济学导论 Q2. [ 8 points ] Anna and John disagree on which econometric model can better predict the stock market volatility. Anna thinks that both COVID-19

Q1. [ 10 points ]

Suppose that demand function for Pfizer COVID-19 vaccine is given below:

Q = αI^βP^δ

Where Q is the quantity demand in units, P is the price in $, I is income, α is a constant, and δ and β are coefficients.

1. How do you estimate the demand above using OLS? Please interpret the coefficients β and δ? 代写计量经济学导论

2. Given the regression results, please answer a, b, and c:

δ = -0.5    S.E_δ = -0.5

Β = 1.2    S.E_β = 0.2 

R² = 0.8    N =30 

Where S.E is the standard error and N refers to the number of observations?

a. Test whether the demand is perfectly inelastic using a 5% significance level? (hint: use t-test)

b. Test whether the vaccine is a normal good or not using a 5% significance level? (hint: use t-test)

c. Test that δ= 0 and β= 0 using a 5% significance level? (hint: use F-test)

Q2. [ 8 points ] 代写计量经济学导论

Anna and John disagree on which econometric model can better predict the stock market volatility. Anna thinks that both COVID-19 and interest rate don’t not affect the stock market volatility since June 2020. So anna included inflation, GDP, and investors sentiment as the main independent variables for her model. However, John strongly believes that, in addition to Anna’s variables, COVID-19 and interest rate both have a significant impact on the stock market. Running a regression on 30 trading days, Anna estimated residuals SSR = 220 and John’s residuals = 200. Use the F-test to see which model fits the data?

Q4. [ 10 points ] 代写计量经济学导论

Suppose that the U.S unemployment rate is given by the model below:

Where Unemp is the unemployment rate ( %), d is a dummy variable that takes 1 for male and 0 for female, Edu is the education level, Skill stands for skills, Age and is the individual age in years.

a. Explain the dummy variable coefficient?

b. Given the same education level, skills, and age among male and female, what is the expected unemployment rate for male and for female?

c. If both male and female workers have 4 years of education, 2 skills, and 40 years old, what is the expected unemployment rate for male and for female?

Q5. [ 9 points ] 代写计量经济学导论

The regression below represents the impact of price and advertising on the quantity sold:

a. Are the price and advertising significant at 1% level? Please explain.

b. Is the model valid? Please explain.

c. F = 50.269, Show to calculate this number?

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