A mathematical model was developed of military enlistment behavior based on the principle of occupational choice. A quality adjustment, applicable to all labor markets, was incorporated into the model in estimating the supply of volunteers. It was assumed that the greater the excess supply of volunteers, the greater the average quality of recruits. The adjusted supply curve took into account variations in the average quality of those who enlisted in the Air Force as a correction for unobserved variations in the excess supply. The increasing elasticity of supply with regard to the military-civilian earning ratio indicates that the universal military pay increases enacted by Congress will provide for an adequate supply of Air Force volunteers. Direct estimation of a supply curve on the observed values for employment by excluding a quality adjustment, when in fact excess supply exists, leads to an underestimation of the true elasticity of supply. Five tables present the data. (Author/AG)