Panel companies do a great job of profiling their members for common attributes. Need to survey Hispanics under 30 years old? No problem. Need to survey divorced college graduates? No problem. Need upper-income parents? Again, no problem!
But what if you need to survey moms who took their child to the museum in the past 6 months? Or, you need upper income households that listen to Sirius XM satellite radio? With target groups like these, things start to get a little more complicated.