Introduction -- Energy security : the current approaches of scholarship -- U.S.-Russia energy ties -- U.S.-Azerbaijan energy diplomacy : BTC and beyond -- Russia-Germany energy cooperation -- The Ukraine conflict : a game-changer? -- Conclusions and policy recommendations : away from resource...

This paper investigates the degree of total factor productivity convergence for the German electricity and gas firms. We use different approaches to compute the productivity level and several old and new panel unit root tests from the second generation to check the existence of a convergence...