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Find the OLS estimators for the parameters using the matrices above.
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- (Econmetrics) Q.1 How can you test for general misspecification of model if it would have only (any of) two independent variables?Assign the figure with the correct correlation coefficients. Possible coefficients: 0.99, 0.58, -0.10, -0.63 Graph A 14 12- 10- 14 Graph B 12- 8- 10- 8. 0- 4- -2 -4- -6- -8 0- 4 8. 14 Graph C 12- 2 Graph D 10- 8- -2- 6- -4- 4- -6- 24 -8- -10- 8 2. 6422. You are interested in the effect of a factory being inspected on whether it reduces its pollution output. There's a variable "number of reported violations" that you have. When the number of reported violations goes from 9 to 10, the probability of being inspected jumps from 20% to 60%. Average pollution levels decrease from 600k Imetric tons of CO2 to 500k metric tons going from 9 to 10 violations as well. What is the fuzzy regression discontinuity estimate of the effect of inspections on air pollution levels?
- 8. Which of the following best describes the linear probability model? The model is the application of the linear multiple regression model to a binary dependent variable The model is an example of probit estimation The model is another form of logit estimation The model is the application of the multiple regression model with a binary variable as at least one of the regressors OOThe table to the right contains price-demand and total cost data for the production of projectors, where p is the wholesale price (in dollars) of a projector for an annual demand of x projectors and C is the total cost (in dollars) of producing x projectors. Answer the following questions (A) - (D). (A) Find a quadratic regression equation for the price-demand data, using x as the independent variable. X 270 360 520 780 The fixed costs are $. (Round to the nearest dollar as needed.) ITTI y = (Type an expression using x as the variable. Use integers or decimals for any numbers in the expression. Round to two decimal places as needed.) Use the linear regression equation found in the previous step to estimate the fixed costs and variable costs per projector. The variable costs are $ per projector. (Round to the nearest dollar as needed.) (C) Find the break even points. The break even points are (Type ordered pairs. Use a comma to separate answers as needed. Round to the nearest integer as…quiz 1 (page 1 of 5) 105 econ مبادئ في الاقتصاد الرياضی ش 2 و ش elearning yu.edu.jo Question 1 Not yet answered Question 3 Marked out of 1.00 Not yet answered Marked out of 1.00 **Assume that you have the following equations: Simplify the following expression: 3X(8x+9)- X(X+7) 4P+4Q=16 2P-Q=2 The equilibrium price is: O a. 23x2 + 20X O a. P=5 O b. X2-30X O b. P=6 O c. 25X2 + 32X Oc. P-2 d. 21X2-24X O d. P-4 e. None of the above O e. None of the above Clear my choice Clear my choice Next page Next page Quiz navigation Quiz navigation 12 31 4 ...
- Question 19 Lot's say you run a simulation and figure out that your sample bs one of the likely sampies that could have come from a DGP of 0. What would that mean? • A That is a good sign. Our model is good and probably explains a lot of variation. • B This is a bad sign for our model because a DGP of 0 means there is no relationship between the explanatory and outcome variable. • C This does not mean anything for our model. We have to run supernova to find out about how good our model is. • Dit depends on what our b Type Markdown and LaTeX: a Question 20 14 MacBook Pro(1.4) Consider the following IS-LM model: I Y=C+I+G C=100+0.4(Y-T) I= 150 +0.2Y - 4,000r r = 0.01 with G = 200 and T = 100. (a) Derive the IS curve and draw it in an appropriate diagram. (b) Calculate the equilibrium values of Y, C, I and r. (c) What is the impact of decreasing government spending to G' = 180 in terms of the new equilibrium value Y"? (d) Suppose the central bank decides it wants to counteract the restrictive fiscal policy. What exactly (i.e. we look for graphical and numerical answers) can the central bank do in order to keep equilibrium output at the value obtained for Y in (b)?2 In the simple linear regression model y = Bo + Bjx + u, suppose that E(u) + 0. Letting a, = E(u), show that the model can always be rewritten with the same slope, but a new intercept and error, where the new error has a zero expected value. 3 The following table contains the ACT scores and the GPA (grade point average) for eight college stu- dents. Grade point average is based on a four-point scale and has been rounded to one digit after the decimal. Student GPA ACT 1 2.8 21 2 3.4 24 3 3.0 26 4 3.5 27 3.6 29 6 3.0 25 7 2.7 25 3.7 30 (i) Estimate the relationship between GPA and ACT using OLS; that is, obtain the intercept and slope estimates in the equation GPA = B, + B¡ACT. Comment on the direction of the relationship. Does the intercept have a useful interpretation here? Explain. How much higher is the GPA predicted to be if the ACT score is increased by five points? (ii) Compute the fitted values and residuals for each observation, and verify that the residuals (approximately) sum…
- Consider the figure below that shows the relationship between advertising expenditure (on the x-axis) and sales revenue (on the y-axis). Which one of the following statements is TRUE? Sales Revenue 3000 2500 2000 1500 1000 500 0 0 20 Ad Dollars vs Sales Revenue 40 60 80 Ad Dollars Spent 100 120 ● 140 A linear model overpredicts sales revenue at lower levels of advertisement expenses. The R2 value with a linear specification will be higher than that with a quadratic specification. With a quadratic specification, we find an increasing marginal productivity of advertisement. With a liner specification, we find an increasing marginal productivity of advertisement.Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the curves about the given axis. y = cos(xx/2), y = 0, 0sxs 1 about the y-axis1. Suppose you observe (y, x₁,x2,...,k) for N observations. For each observation i, the model is yi Bo + B1x1i + B₂x2i + + BkXki + €į. Write the model out in matrix form. What are the dimensions of Y, X, B, €? =