During that time, I gained a whole new understanding of the concept of inertia, and the challenge of getting an object at rest into motion.

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It will take many months, in some cases years, before Pena Nieto's reform agenda becomes law and produces its first results, plenty of time for big promises to be derailed by special interests, institutional inertia and the PRI's old guard.

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Moreover, very large and complex economies are characterized by immense inertia, which means that changes of any nature require a very, very long time to effect.

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And while most of the flak has been flying in the Welsh Government's direction over its alleged lack of a policy programme, the criticism of inertia has also been levelled at the Assembly itself, which sat for the first time on May 11 and has so far managed to constitute just two committees - Petitions and Subordinate Legislation.

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