The economic contributions of the chemical industry are numerous, though often overlooked in traditional analyses that consider only the direct jobs and output of the industry. As discussed more thoroughly in the 2013 Guide to the Business of Chemistry
, the business of chemistry directly creates hundreds of thousands of jobs. In addition to the jobs created directly by the industry, additional jobs are supported by the purchases of the chemical industry and by the subsequent expenditure-induced activity. The chemical industry paid its employees wages and salaries and purchased supplies and services (including transportation, contract workers, warehousing, maintenance, accounting, etc.). These supplier businesses, in turn, made purchases and paid their employees, thus generating several rounds of economic spending and re-spending generated by the chemical industry.