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Problem:
(a) Why is an error term added to a regression and explain its importance in the OLS procedure?
(b) Suppose we have a linear equation with a constant term, one explanatory variable and an error term, show in details the steps required, using the OLS procedure, to derive the estimates of the constant term and that of the coefficient of the explanatory variable.
(c) Suppose a researcher wants to test whether the returns on a company stock (y) show unit sensitivity to two factors (factor x2 and factor x3) among three considered. The regression is carried out on 144 monthly observations. The regression is: Yt = β1 + β2x2t + β3x3t + β4x4t+ ut
i) What are the restricted and unrestricted regressions?
ii) If the two RSS are 502.4 and 302.8 respectively, perform an F-test of the restriction, showing all the required steps.
(d) How are the t-test and the F-test related and describe in which cases they cannot be applied?
Illustrate the measurement of inputs and outputs in production technology? Measurement of Inputs and Outputs in Production Technology This is generally most satisfactory to
is economics a positive science
Change in consumer and producer surplus from price controls * Observations: - The loss is equal to area B + C. - The change in surplus = (A - B) + (-A - C) = -B - C -
Money facilitates market activities and is essential in complex market systems. With money people can avoid the problems associated with coincidence of wants. Between, these pro
On Valentine's Day, the price of roses increases by more than the price of greeting cards. Why? (Hint: Consider what makes roses and cards different and how that difference might
1. The marginal benefit (demand) curve for pollution for an industry is P=100-4*Q, where Q is emissions in tons. The current emissions tax (price) for pollution is $40/ton. Regu
1. Discuss how banks make money, and are structured in respect to Asset, Liability and Capital Management – give examples.
alternative theories of trade
Explain what the phrase “price rationing” means. Price rationing is the method by which the market system assigns goods and services to consumers while quantity demanded exceeds
(i) How do we measure economic growth and why do we need economic growth? (ii) What can governments do to stimulate economic growth and create jobs? (provide some current exampl
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