Prices may differ between regional markets if transport capacities are limited. We develop a new approach to determine to which extent such differences stem from limited participation in cross-border trader, i.e. lack of integration, rather than from bottlenecks. This approach considers both...

The seasonal demand for natural gas requires supply flexibility. This "swing" is now largely provided in northwestern Europe by indigenous production. Declining reserves will increase the dependency on imports from far-off sources, which are less flexible. Hence, flexibility must be provided by...