Why Regional Input-Output Analysis

In the present paper an attempt has been made to answer the following important questiong:

(a) Are input-output coefficients invariant over the regions?

(b) Are input-output coefficients invariant over time?

(c) Is there 'size of sector' effect on input-output coefficients?

Alternatively, in statistical parlance, the object of our analysis is to test the following three null hypotheses corresponding to (a), (b) and (c) respectively:

(i) There is no regional effect on input-output coefficients.

(ii) There is no temporal effect on input-output coefficients.

(iii) There is no 'size of sector' effect on input-output coefficients.