Abstract While there is substantial documentation of the growth in part-time employment, there are relatively few studies which address the uneven distribution of part-time workers across economic sectors. This paper examines the effects of relative labor costs, industry attributes and job task characteristics, and industry computer use on employment ratios of part-time to full-time workers across 155 industries. Results show that industry compensation, particularly health-care provision, has a significant effect on the distribution of part-timers across economic sectors. Conditions which increase the cost of turnover are negatively associated with the use of part-time labor; whereas, industry job attibutes which facilitate supervision are positively associated with industry use of part-time workers. Computer use does not have a uniform effect. Industry part-time employment ratios are examined with a logistic regression which takes into account simultaneity of supply and demand by estimating instruments for the endogenous variables.