Toward a leading indicator of catastrophic shifts in complex systems: Assessing changing conditions in nation states.

From 1952 to 1976, FI for Germany steadily increased, followed by a decreasing trend which became more pronounced in the late 1980s during the time of the reunification and the Maastricht Treaty.

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Here, we use a frequentist interpretation of the theorem to estimate whether a decline in Fisher information is likely to be significant.

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