Transmición del resumen del autor. The manner in which host governments and foreign investors have resolved, or failed to resolve, their contractual disputes over the past decade and a half has depended primarily on both national and international political environmental of the time. The rise in oil and commodity prices since the late 1990s triggered a shift of the advantage in such disputes from the investor to the host government. Both are now faces with the challenge of finding an acceptable solution for all, as Maria Kielmas explains

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