Last week in the Tracking Down Free Market Research post, Laura revealed one of our secrets to finding expensive market research reports using Google. Here's another trick to use when you aren't lucky enough to find the entire research report. Look for excerpts of that report, especially charts and graphs, highlighted in PowerPoint presentations. You can look in SlideShare, where you will find lots of presentations posted, but don't limit yourself just to that site. Do an advanced Google search and limit to the specific presentation file types or just add the shortcut filetype:PPT or filetype:PPTX to your keywords. Here's an example of a slide about the US Biodiesel Market that features a graph from Euromonitor International: