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[ECO454] All the followings are sources of deviation in parameter model estimation exception ____________.
constant variable

[ECO454] Economic _______ describes the way in which economic variables are interelated.
model

[ECO454] Which of the followings is not among the stages of eeconometric research?
hypothesis

[ECO454] The stages involved in expressing economic relationships between variables in mathematical form is called ____________?
model formulation

[ECO454] One of the assumptions about error term in econometric  is that the error term has ____________?
zero mean

[ECO454] Given an econometric model C= a +bY + u; what does 'u' stands for?
error term

[ECO454] A model is a __________ representation of a real world process.
simplified

[ECO454] There is posibility of error of _______ when magnitudes relating to individual data are sumed up.
aggregate

[ECO454] The following are  good properties of econometric model except?
linear bias

[ECO454] In the following econometric model Y= a +bX + U; what does 'b' stands for?
coefficient