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A covariance stationary time series is weakly dependent if:
Poor Nations
Countries characterized by low levels of income, limited industrial development, and often a low Human Development Index (HDI), facing challenges such as poverty, disease, and low life expectancy.
Central Planners
Individuals or institutions responsible for making all the economic decisions in a centrally planned economy, determining what, how, and for whom to produce.
Communist Countries
Nations that formally adhere to Marxist-Leninist principles, aiming for a classless society and the absence of private ownership of the means of production.
Scarce Resources
Resources that are limited in availability and cannot sufficiently meet all the wants and needs of a society.
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