Suffolk has made use of polling methodologies that combine "traditional" statewide probability sampling with additional nonprobability sampling of "bellwether" districts, making use of this technique in its 2008 New Hampshire primary polls for WHDH, among other races.David Paleologos & Elizabeth J. Wilson, "Use of Bellwether Samples to Enhance Pre-Election Poll Predictions: Science and Art," American Behavioral Scientist (April 2011), vol. 55 no. 4 (published online before print February 28, 2011), pp. 390-418. doi:10.1177/0002764211398068. By the year 2011, the firm's "bellwether predictions have matched election outcomes in 33 of 36 cases, a 'hit rate' of 92%."
