The original, 2x2x2 model was derived with restrictive assumptions, partly for the sake of mathematical simplicity.

To sum up the neo classical growth model of Meade is based on certain restrictive and unrealistic assumptions.

To be logically correct, some restrictive assumptions are needed.

However, if we drop the highly restrictive assumptions of Luxemburg, equilibrium is possible.

There are less restrictive assumptions that could still keep visitors at home.

However, extremely restrictive (and often unrealistic) assumptions have had to be adopted in order to make the problem amenable to theoretical analysis.

In traditional game theory, some very restrictive assumptions on prisoner behaviour are made.

The existence of a global Hamiltonian circle action on appears to be a restrictive assumption.

This is a less restrictive assumption than the classical one, as it allows for the presence of heteroscedasticity or other effects in the measurement errors.

This model was the precursor to all modern growth models and differed only in its restrictive assumption of fixed proportions in production.