Iowa ranks high in its manufacturing and logistics sectors, compared with other states, but fares poorly in areas such as tax climate and global reach, according to a report by Ball State University's Center for Business and Economic Research in Indiana. The report gave Iowa a grade of A for manufacturing and B for logistics, but a D-minus for tax climate and D for global reach. The Ball State center looked at each state's advanced manufacturing employment as a share of total manufacturing employment in 2013. Data show that nationally, STEM (science, technology, engineering and mathematics) and white-collar jobs are growing in the advanced manufacturing sector, while blue-collar occupations have declined.