Isoquants
	The possible combinations of inputs that will produce given level of output can be defined as isoquant:
An isoquant; a curve that shows the efficient
Combination of labor and capital that can produce a
Single (iso) level of output (quantity).Thus,
            Q = (Lp + KP)1/P                        (2 - 12)
	The marginal rate of technical substitution for a CES isoquant is :
                          MRTS = - (L/K)P-1               (2 - 13)
	At every point on a CES isoquant, the constant elasticity of substitution is:
              ?So, efficiency involves that isoquants do not cross.