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Det gör vi genom två sammankopplade undersökningar; en om regenternas resemönster och en utifrån lokalt nätverksbyggande bland härskande skikt (1356-1360, 1434-1436 & 1470-1520), där även ofrälse aktörer och kvinnor återfinns.

Warr et al (2010) applied ‘useful exergy’ methodology to the study of long-run energy transitions in four developed economies: Japan, Austria, US and UK.

They find firstly that aggregated primary energy to ‘useful exergy’ efficiencies increased significantly in the last century, but stabilized after the first oil crisis.

Increased energy consumption has led simultaneously to technological breakthroughs, which have improved the efficiency of energy use.

Although the effects of energy efficiency have been remarkable throughout modern history, there is disagreement on how to account for energy technological change.

Expansion overseas was essential to Britain’s growth in the nineteenth century.

The existing debate has, however, been rather inconclusive as to the role and relative importance of the various trading partners and commodities.

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Of special interest is the analysis of the long-run evolution of useful exergy intensity in comparison with the primary energy intensity figures (Henriques and Borowiecki, 2017).

How efficient did these European countries become during her historical transition from an agrarian to a service society?

In the last decades, it has been considered the main offsetting factor of rising global energy consumption and CO2 emissions.