Latin maxim: "cujus est solum ..."

Map Branches

• Didow v. AB Power 1988, AB CA
  • Facts & Issues
    • Power lines over Didow's farm
    • Alleged trespass to airspace
    • Chambers judge denied claim
    • Sought declaration from CA
  • Haddad J.A.
    • Latin maxim: "cujus est solum ..."
    • Limited: "res communis" at some point
    • Interference with actual/potential use?
  • P.S.
    • Hydro & Electric Energy Act, RSA 2000
• Edwards v. Sims 1929, KY CA
  • Facts & Issues
    • Great Onyx Cave
      • Edward's entrance
      • Under Lee's land
    • Trespass?
    • Judge Sims ordered survey for Lee
    • Edwards challenged Sims' ruling
  • Stanley J.A. (majority)
    • "cujus est solum ..." literally
    • Ordered survey
  • Logan J.A. (dissenting)
    • "cujus est solum ..." false
    • Entrance + exploration = ownership
• Coase Theorem
  • "Problem of Social Cost" (1960)
  • If transactions cost zero, initial allocation of property rights will not affect ultimate use
  • Didow v. AB Power
    • A
      • Move lines costs Power Co. $32k
      • Airspace worth zero to Didow
      • Ruling for Power Co. = lines stay
      • Ruling for Didow = lines stay
    • B
      • Move lines costs Power Co. $32k
      • Airspace worth $40k to Didow
      • Ruling for Power Co. = lines move
      • Ruling for Didow = lines move
  • Edwards v. Sims
    • Ziff TEXTbook, p. 85
  • Problems
    • Transaction costs
      • Examples
    • Holdouts/monopolies
      • Epstein
    • Endowment effects
      • Excercise

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