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

Supply and demand, Discuss some of the effects of the economic downturn on ...

Discuss some of the effects of the economic downturn on supply, demand, inferior goods, complimentary goods, substitute goods, and price. words accepted#

Explain about managerial economies, Q. Explain about Managerial Economies? ...

Q. Explain about Managerial Economies? Large scale production makes possible the division of managerial functions. So there exists a production manager, a finance manager, asal

Price elasticity of demand, Price Elasticity of Demand Is the respons...

Price Elasticity of Demand Is the responsiveness of the quantity demanded to changes in price; its co-efficient is Pe d    =  Proportionate change in quantity demanded

Pigou effect, The pigou effect, also called the real balance effect, is nam...

The pigou effect, also called the real balance effect, is named after the well known Cambridge school economist Arthur Cecil pigou who had first clearly formulated the relationship

Explain supernormal equilibrium, Q. Explain Supernormal Equilibrium? S...

Q. Explain Supernormal Equilibrium? Supernormal Equilibrium: E is the point of stable equilibrium as MC = MR and MC cuts the MR from below.   Figure: Supernormal Equ

Demand forecasting methods, Prediction markets:   These are speculative mar...

Prediction markets:   These are speculative markets fashioned with the intention of making predictions. Assets which are produced possess an ultimate cash worth bound to a specific

Elasticity, The acme paper company lowers its price of envelopes (1000 cou...

The acme paper company lowers its price of envelopes (1000 count) from $6to $5.40.

Eating a certain amount, Jeremy is an economics learner who loves hamburger...

Jeremy is an economics learner who loves hamburgers. He could eat any number of them for dinner, but he gets a really bad stomach ache after eating a certain amount. In fact, his u

Difficulties in using fiscal policy, Difficulties in using fiscal policy ...

Difficulties in using fiscal policy There are several problems involved in implementing fiscal policy.  They include: Theoretical problems Monetarists and the Keynesia

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