You will be given a topic and an argument. Decide the argument's stance towards that topic. The argument's stance is in favor or against the topic. If the argument supports that topic, answer with "in favor"; otherwise, if the argument opposes the topic, answer with "against".

topic: Nuclear energy
argument: Concentration of power in nuclear is economical.
in favor
The passage suggests that concentration of power in the nuclear is economical. This implies that the author believes that nuclear energy is economical and supports the use of nuclear energy. Therefore, the argument is "in favor" of Nuclear Energy..