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

Real rigidities in the labour market, Real Rigidities in the Labour Market ...

Real Rigidities in the Labour Market   New Keynesian  theories of the labour market help in explaining  the existence of involuntary unemployment. The theories also attempt to

Decrease in demand - effect on equilibrium price, Decrease in Demand ...

Decrease in Demand At the initial equilibrium price P 1 , quantity demanded falls from q 1 to q d .  But the quantity supplied is still q 1 at this price.  Hence, this

Types of price elasticity of demand, Types of Price Elasticity of demand ...

Types of Price Elasticity of demand   a)     Perfectly inelastic demand Demand is said to be perfectly inelastic if changes in price have no the quantity demanded so

Factors affecting size of national income, Factors affecting the size of  N...

Factors affecting the size of  National Income The size of nation's income depends upon  the quantity and quality of the factor endowments at its disposal. A nation will be ri

Explain about the pricing analysis, Explain about the Pricing analysis ...

Explain about the Pricing analysis Microeconomic methods are employed to examine lots of pricing decisions. This includes transfer pricing, price discrimination, joint product

What are the concept of managerial economics, Concept of Managerial Economi...

Concept of Managerial Economics The discipline of managerial economics deals with characteristics of economics and tools of analysis that are used by business enterprises for dec

#, Illustrate the application of economic theory to some business problems

Illustrate the application of economic theory to some business problems

Real rigidities in the credit market, Real Rigidities in the Credit Market ...

Real Rigidities in the Credit Market How imperfections in the goods markets enable firms  to  set  prices  so  as to  generate  price  rigidities,  e.g.,  because of countercy

Describe the application of economic theories, Describe the Application of ...

Describe the Application of economic theories Pertinent business decisions necessitate an unambiguous understanding of the environmental and technical conditions under which bu

Find out lowest efficiency wage and value , A risk-neutral agent's working ...

A risk-neutral agent's working life has two periods. In each period, the agent can provide high effort (at personal cost $2,000) or low effort (at zero personal cost). In a given p

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