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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?
Socio Economic conditions of country also affect the sales forecasting. They may include total national income per capita income standard of living of the masses, education, inflat
elasticity concept in policy formulation
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The Tastee Bakery Company supplies a bakery product to many supermarkets in a metropolitan area. The company wishes to study the effect of shelf display height employed by the supe
explain the nature and scope of economics.
The marginal rate of substitution (MRS) quantifies the quantity of one good a consumer will sacrifice to get more of the other good. – It is calculated by the slope of the indif
What is the impact of microeconomics on economy?
a) Consider the following flows (in thousand of people) between the various labour market states in a particular month: UE = 240 000; UNLF = 180 000; EU = 190 000; NLFU = 220 000
Determinants of the price elasticity of demand are explained below: 1. Number of close substitutes present within the market - The more and closer substitutes available in the
explain why policies for promoting market competition are desireable
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