1. Introduction 2. Direct Economic Impact of the Value Chain of a Marcellus Shale Gas Well 3. Economic Impact Analysis on Washington County, PA 4. Economic Impact Analysis on Northeast PA Counties 5. Marcellus and the State of Pennsylvania 6. Marcellus and the State of West Virginia 7. Barnett, Eagle Ford, and the State of Texas 8. Communities under the Boom of Shale Gas Development 9. Origins and Consequences of State-level Variation in Shale Regulation: The Cases of Pennsylvania and New York 10. Balance between Economics and Environment: a Shale Gas Perspective.