The Rural Income Maintenance Experiment (1979) used sample subjects from the Midwest and the South (Iowa and North Carolina) to measure the effect of alternative tax rates and minimum guarantees upon the work behavior of rural male heads of households. Three contingent aspects of job change behavior were examined: the impacts of support on subjects' probabilities of changing employers (241 subjects employed at the pre-enrollment interviews), their duration of unemployment (165 subjects employed at the pre-enrollment interview who subsequently left that employer), and their selection of new jobs (133 subjects employed at the pre-enrollment interview and the 8th quarterly who changed employers 1 or more times). No additive effects of support payments on changing employers were evidenced. However, relative to similar control group subjects, experimentals who initially had desirable positions were less likely to change employers than were those with less desirable positions. Time of unemployment was longer among subjects who expected less gain upon re-employment than among those who expected greater income gains. Those whose prior jobs were undesirable tended to take new jobs less desirable in terms of status and job satisfaction. Those subjects who had good jobs before tended to obtain better positions than similar controls. Experimentals with secondary earners in the family and a higher guarantee level tended to find jobs with more status and earnings. Findings were compared with the results of the New Jersey-Pennsylvania Graduated Work Incentive Experiment. (Author/CM)