Some experts have concerns about the way the new CDC data were collected and analyzed.

WSJ: Autism Diagnoses Up Sharply

Schering says there were problems with the way the data from the study were collected and analyzed, and that it needed all this time to fix those problems.

FORBES: Fix It, Fred

After the analysis of data collected by the city but never combined and analyzed, they were issuing vacate orders on more than 70 percent of the buildings they inspected.

FORBES: What's to be Done about Big Data?