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We use our vertical Milky Way disc model together with Galaxia to create mockobservations of stellar samples in the solar neighbourhood. We compare these tothe corresponding volume complete observational samples of dereddened andbinary accounted data from Hipparcos and the Catalogue of Nearby Stars.Sampling the likelihood in the parameter space we determine a new fiducial IMFconsidering constraints from dwarf and giant stars. The resulting IMFobservationally backed in the range from 0.5 to 10 Msun is a two slope brokenpower law with -1.49 +- 0.08 for the low mass slope, a break at 1.39 +- 0.05Msun and a high mass slope of -3.02 +- 0.06. The Besancon group also convergingto a similar IMF even though their observational sample being quite differentto ours shows that the forward modelling technique is a powerful diagnostic totest theoretical concepts like the local field star IMF.

Towards a fully consistent Milky Way disc model - III. Constraining the initial mass function