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We show how to match quark models to the 1/Nc expansion of QCD. As an examplewe discuss in detail the mass operator of orbitally excited baryons and matchit to the one-gluon exchange and the one-boson exchange variants of the quarkmodel. The matching procedure is very general and makes use of thetransformation properties of states and operators under S_N^{orb} \timesS_N^{sp-fl}, the permutation group acting on the orbital and spin-flavordegrees of freedom of N quarks.

Excited Baryons in Large Nc QCD: Matching the 1/Nc expansion to quark models using the permutation group S_N