Construction of an explanatory model, Managerial Economics

Assignment Help:

Q. Construction of an explanatory model?

Construction of a sample:  To apply multiple regression a large sample is generally essential (ideally between 2,000 to 15,000 individuals).

Note that for time series data, much less is required.

Data collection: Reliable data should be collected, either from a monitoring system or from a questionnaire survey or from a combination of both.

Calculation of coefficients:  Coefficients can be calculated comparatively easily, by using statistical software which is both accessible and affordable to PC users.

Test of the model:  The model aims to explain as much of the variability of observed changes as possible. To check how useful a linear regression equation is, tests can be performed on the square of correlation coefficient r. This tells us what percentage of variability in the y variable can be explained by the x variable. A correlation coefficient of 0.9 would demonstrate that 81% of the variability in Y is captured by variables X1-k used in the equation. The part which remains unexplained represents the residue (ε). So the smaller the residue better is the quality of model and its adjustment. Analysis of residues is a very significant step: it's at this stage that one sees the degree to that the model has been adapted to phenomena one wants to explain. It is residue analysis which also enables one to tell whether the tool has made it possible to estimate effects in a reasonable way or not. If significant anomalies are detected, regression model must not be used to estimate effects and original causal model must be re-examined, to see if further predictive variables can be introduced.


Related Discussions:- Construction of an explanatory model

Convertible national currencies, Convertible National Currencies Curre...

Convertible National Currencies Currencies are convertible when holders can freely exchange them for other currencies. There are several advantages in using a particular natio

Neo-classical view, The neo-classical view The neo-classical view is t...

The neo-classical view The neo-classical view is that market forces are the best directors of the economy.  Positive attempts by the government it is argued inevitably make th

Demand for money, Demand for money   The demand for money is a more d...

Demand for money   The demand for money is a more difficult concept than the demand for goods and services.  It refers to the desire to hold one's assets as money rather tha

Operate a mixed economy, Problem 1: All economies of the world can be s...

Problem 1: All economies of the world can be said to be ‘mixed', to a greater or lesser degree, in that there is no economy where there is no state activity and no economy wher

Explain about cardinal utility, Q. Explain about Cardinal utility? A me...

Q. Explain about Cardinal utility? A measure of utility or satisfaction derived from consumption of services and goods which can be measured using an absolute scale. Cardinal u

Proportion of income spent on a commodity, Q. Proportion of Income Spent on...

Q. Proportion of Income Spent on a Commodity? Another characteristic that has an impact on the elasticity of demand for a commodity is proportion of income that consumers use u

Theories of the firm, Define Williamson''s Model of Managerial Discretion p...

Define Williamson''s Model of Managerial Discretion practice?

Circular flow of income and expenditure, The Circular Flow of Income and Ex...

The Circular Flow of Income and Expenditure This is an economic model illustrating the flow of payments and receipts between domestic firms and domestic households. The househo

Explain how the firm can produce the same output, A firm is employing 100 h...

A firm is employing 100 hours of labor and 50 tons of cement to produce 500 blocks. Labor costs Rs 4 per hour and cement costs Rs 12 per ton. For the quantities employed MPL = 3 an

Short run output and price, SHORT RUN OUTPUT AND PRICE In monopolistic...

SHORT RUN OUTPUT AND PRICE In monopolistic competition, it's the product differentiation that permits its price without losing sales.  Due to brand loyalty consumers will c

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd