- Market analysis, business, and economic research (19)
- Business analysis (76)
- Business economic service (42)
- Business research service (187)
- Economic research (126)
- Market analysis or research (1020)
- Merger, acquisition, and reorganization research (52)
- Opinion research (22)
- Research services, except laboratory (630)
- Survey service: marketing, location, etc. (443)
- Educational research (134)
- Sociological research (4)
