Despite valiant efforts over nearly five decades, attempts to determine the
IMF over a complete mass range for galactic field stars and in open clusters
have proved difficult. Infrared imaging observations of extremely young
embedded clusters coupled with Monte Carlo modeling of their luminosity
functions are improving this situation and providing important new
contributions to our fundamental knowledge of the IMF and its universality in
both space and time.Comment: 6 pages, 2 figures to appear in "The IMF@50", Kluwer Academic Press,
eds. C. Corbelli, F. Palla, & Hans Zinnecke