『Abstract
Energy security has become a popular catch phrase, both in the
scientific arena as well as in the political discussion. Yet,
in general the applied concepts of energy security are rather
vague. This paper sheds some light on concepts and indicators
of energy security. First, we conceptually discuss the issue of
energy supply security and explain why it is not to handle by
one science alone and what economics may contribute in order to
structure the topic. After providing a brief survey of existing
attempts to define or measure energy security we suggest an additional
dimension along which indicators of energy security may be classified:
ex-post and ex-ante indicators. Finally, we illustrate our concept
on the basis of several simplified indicators. While ex-post indicators
are mostly based on price developments, ex-ante indicators are
to a greater extent aimed at illustrating potential problems.
Our illustration suggests that it is worthwhile to take into account
the market structure along with the political stability of exporting
countries.
Keywords: Energy security; Indicators; Energy imports』
1. Introduction
2. Measuring the security of energy supply
2.1. Conceptual issues
2.2. Indicators measuring the security of energy supply
2.2.1. IEA price component indicator
2.2.2. IEA physical availability component indicator
3. Ex-post and ex-ante indicators of energy security
3.1. Ex-post indicators
3.2. Ex-ante indicators
3.3. An illustrative ex-post indicator
4. An illustrative ex-ante indicator
5. Conclusions
Acknowledgement
References