Let's talk about something I really don't know very much: volleyball market and its dynamics.
How much are players in top clubs paid? Who does receive all the money? Just players or also federations? What about agents? Do clubs make speculations (example - buy a player for a season for 100, make a contract of two years, and than sell it for 200)? Are the prices on the rise? Which roles are more paid? Does the prices depend on players offer and demand (I mean if there is more offer of good liberos than demand the prices should go down, but if there is less offer and more demand of good setters the prices should go up?)?
closed markets (almost no export and no import) - China, Cuba
almost closed markets (few export and few import) - Japan (one foreigner for club), South Korea
no export but some import (limitations of two or three foreigners for club) - Russia, Turkey
some export and more import - Italy
some export and some import - Poland
some export and almost no import - Brazil, Azerbaijan
imports a lot and almost no export - Spain, Greece, France (especially Cannes), Switzerland (especially Volero)
exports a lot and almost no import - United States, Dominican Republic, Serbia, Croatia, Bulgaria, Czech Republic, Germany, Netherlands
It would be great if Cuba and China opend their markets!