Valley forge mountain partners liquidating trust
You'd probably be better off reading the full article but some people want executive summaries.
Rick starts with certain assumptions and follows them to various conclusions about the interstellar economy.
Don't forget the entry in this website about Cargo Holds As mentioned below, if you want to play around with interstellar trading, or even try doing a full simulation (to do worldbuilding for creating the background of your new novel), I'd suggest getting a copy of GURPS Traveller: Far Trader.
Written with help from a real live economist, this allows one to model interplanetary and interstellar trade with equations and everything.
Therefore if the cargo was available for free at the origin the minimum selling price at destination is 0,000 per ton, or 0 per kilogram.
The implication is that only very high value cargo can be profitably shipped interstellar.
For comparison purposes we need an airliner's average cost of running, but the corporations are remarkably closed-lipped about that.
There is a long history of SF novels about interstellar free traders eking out a marginal existence on the fringes of the huge trader corporations, from Andre Norton's Solar Queen novels to the Space Angel series by John Maddox Roberts.
Go to The Tough Guide to the Known Galaxy and read the entries "ECONOMY", "FREE TRADERS", "PIRACY", "REPLICATOR", "TRADE" and "TRADE FEDERATION".
You can alter some of the assumptions yourself to tweak the economy to suit your science fictional background.
Merchant Starship Costs Assumption: starships in the interstellar empire are equivalent to present-day jet airliners.