text_combined: add price discovery sites williams launches ue web site cross commodity pricing tulsa based williams monday launched ue cross commodity price index spot future energy prices companion web based energynewslive com similar dow jones equity markets williams ue offer equivalent benchmark overall price energy measuring price average eight individual commodities electricity natural gas unleaded gasoline heating oil ethane propane residual fuel jet fuel site includes information pricing trends including national spot ue forward ue regional ue commodity quotes well daily weekly monthly commentary included site energypulse feature dr dennis brien director energy policy university oklahoma energypulse airs every friday williams energynewslive site offers analysis trends energy pricing impact economy energy williams ue introduced year ago energynewslive debuted williams said tested refined site company market activity also reviewed energy information administration said williams view site visit www williams ue com