Methyl methacrylate (MMA) acrylamide (AA) system was studied in radical conventionally and nonconventionally initiated polymerization reaction with respect to the 'bootstrap' effect using the penultimate model propagation kinetics of vinyl copolymerization. For this, two different methods, the Nelder-Mead simplex method and a scanning method have been adapted for the determination of r l, r'l, r2, r~ parameters without constraints to the reactivities of the monomers used. Among the penultimate r-parameters the ranges of their statistically equivalent values have been determined. Good agreement of the calculated copolymer microstructure with results on the experimental basis for styrene acrylonitrile monomer system proves the reliability of the calculation procedures. The triad fractions of the MMA AA copolymer calculated on the basis of the penultimate model showed that the penultimate model does not provide any better representation of the copolymerization of MMA with AA than the previously discussed terminal model. Spectral analysis of the triads in copolymer is proposed to verify the right kinetic model as well as the applicability of the 'bootstrap' model for the monomer system. ~,