How to Determine whether Regional Markets are Integrated? Theory and Evidence from European Electricity Markets

Gebhardt, Georg; Höffler, Felix (April 2008): How to Determine whether Regional Markets are Integrated? Theory and Evidence from European Electricity Markets. SFB/TR 15 Discussion Paper No. 236

Abstract

Prices may di er between regional markets if transport capacities are limited. We develop a new approach to determine to which extent such di erences stem from limited participation in cross-border trader rather than from bottlenecks. We derive a theoretical integration benchmark for the typical case where transportation markets clear before the product markets, using Grossman's (1976) notion of a rational expectations equilibrium. We compare the benchmark to data from European electricity markets. The data reject the integration hypothesis: Capacity prices contain too little information about spot price di erential; this indicates that well informed traders do not engage in cross-border trade.

• Item Type: Paper (Discussion Paper)
• Keywords: Market integration, electricity markets, interconnector,competition policy, rational expectations equilibrium
• Faculties: Special Research Fields > Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems; Special Research Fields > Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems > A4 - Unvollständige Verträge, Marktinteraktion und soziale Vergleichsprozesse; Special Research Fields > Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems > B3 - Unternehmenskontrolle, Unternehmensfinanzierung und Effizienz
• Subjects: 300 Social sciences > 330 Economics
• JEL Classification: G14, D84, L94
• Language: English