1. (A) Professor of Economics at the University of Tubingen in Germany

    (A) Professor of Economics at the University of Tubingen in Germany

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    • 1
  2. 1. Non-luminous zone 2. Luminous zone 3. Dark inner zone 4. Blue zone

    1. Non-luminous zone
    2. Luminous zone
    3. Dark inner zone
    4. Blue zone

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    • 8