In this guide you'll find some of our most-used resources for researching industries. Keep in mind that gathering information about an industry can be very different each time you do it. Sometimes, you may be researching a large industry, with many companies who are publicly-owned, like the auto, airline, and retail industry. In this case, you'll probably find a lot of information that you'll need to sift through. Other times, when researching small industries with just a few companies or companies that are mostly privately-owned (such as the wooden toy industry or bagged ice industry) you may need to try all of these sources to put together a picture of what's going on in the industry and how it operates.
I usually recommend when doing industry research that you start by finding out what classification number the U.S. Government has assigned to that industry. They collect a lot of data about industries and make it available for free to everyone.