Natural gas end–use and electric generator prices
 Domestic and Canadian natural gas wellhead prices
 Domestic natural gas production
 Canadian natural gas imports and production
  Lease and plant fuel consumption
  Pipeline fuel use
  Pipeline and distribution tariffs
  Interregional natural gas flows
  Storage and pipeline capacity expansion
  Supplemental gas production

 Natural gas demands
 Domestic and Canadian natural gas supply    curves
 Mexican and liquefied natural gas imports and    exports    
 Macroeconomic variables
 Associated-dissolved natural gas production

 Historical consumption patterns
 Historical flow patterns
 Rate design specifications
 Company-level financial data
 Pipeline and storage capacity and    utilization data
 Historical end-use prices
 State and Federal tax parameters
 Pipeline and storage expansion cost    data
 Supplemental gas production