But why should the fairest price be equal to exactly 12 months of earnings? Why not 1 month, or 100 months? Is there something special about the length of Ear

But why should the fairest price be equal to exactly 12 months of earnings? Why not 1 month, or 100 months? Is there something special about the length of Earth's orbit that makes it the correct ratio for converting flows to values? If a business were incorporated on Mars, would the fair price be one Earth year of earnings, or one Mars year of earnings? (The latter price would be 88% higher.)