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

Dominant strategy, In a one-shot game, if you advertise and your rival adve...

In a one-shot game, if you advertise and your rival advertises, you will each earn RM5 million in profits.  If neither of you advertises, your rival will make RM4 million and you w

Income elasticity of demand, Aside from the price of a product and its subs...

Aside from the price of a product and its substitutes, another significant element of demand for a product is consumer's income. As noticed previously, relationship between demand

Describe the meaning of managerial economics, MEANING OF MANAGERIAL ECONOMI...

MEANING OF MANAGERIAL ECONOMICS Managerial economics which is used synonymously with business economics is a branch of economics which deals with application of microeconomic ana

Will you make any profits in the short run, Problem 1: Using relevant e...

Problem 1: Using relevant examples, discuss the pricing strategies that firms can use to capture value from their customers. Problem 2: You are a manager in a perfectl

What is the advantage of mixed economy system, Benefits are: 1) People...

Benefits are: 1) People can create their own decisions 2) The government has limited control, which is good for arrangement 3) Gives freedoms like Enterprise, ownership,

Williamson model, williamson model and managerial discretion about its obje...

williamson model and managerial discretion about its objective and statement of problem

Government spending multiplier, Now, let's modify our model a bit. Let's ad...

Now, let's modify our model a bit. Let's add a fourth sector of spending so that Y = C + I + G + X n with X = X o and M = M = f (Y). Will this change, by itself, increase, decrea

Meaning of desire for a commodity, Desire for a commodity This validat...

Desire for a commodity This validates that a want or a desire doesn't develop into a demand except it is supported by the ability and willingness to acquire it. For example, a

Methods of demand forecast which rely on quantitative data, Methods which r...

Methods which rely on quantitative data: Rule-based forecasting Data mining Quantitative analogies Discrete event simulation Neural networks Extrapo

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