Projection and Forecasting

作者: Nathan Keyfitz

DOI: 10.1007/978-1-4757-1879-9_8

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摘要: All statistical facts refer to the past. The United States Census of April 1970 counted 203 million us, but no one knew this until following November, and details count were published over course years. census differs only in degree from stock market prices, which are hours old before they appear daily press. There exceptions—not even statistics intentions—to rule that all data some obsolete by time reach us.

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