Subject: natural gas production vince - i spoke with roy kass of the energy information agency this morning . apart from clarifying the timeliness , or lack thereof , of the published state - specific wellhead production estimates , he indicates their scientists find severe weather in the fields ( freezes , hurricanes ) to be a far more significant issue in production , and in wellhead prices , than is severe weather in the northeast , for instance . also , he agrees with you as to there being strictly increasing marginal costs in production , there being a rich texture of wells in terms of their efficiency , technologies , maintenance and investment issues . clayton