The TGAS model now under development is a useful tool to undertake further sensitivity analysis and evaluation on tight sands gas. This paper addresses the issue of economic rent and its implication for early resource development. The analysis of economic rents at the Uinta and Liceance Basins in the Rocky Mountains and the Edwards Lime and Cotton Valley regions of Texas indicates that the greatest near-term development potential appears to be in the Rockies and Texas--despite the preponderance of tight gas assumed by NPC to exist in the Northern Great Plains. The use of risk analysis in estimating resource economics is shown to be particularly important to the RandD community.