About: http://webisa.webdatacommons.org/163341928

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	And there can not be any empirical evidence for the accuracy of policy preference polls because there is no way to measure public opinion other than by polls.
http://www.w3.org/ns/prov#wasQuotedFrom	econlib.org