bilateral monopoly
Economics term for a market with a single buyer and a single seller.
In a bilateral monopoly market, price negotiation becomes important.
独占 is a general monopoly (one seller), while 双方独占 specifically refers to a market with both a single buyer and a single seller.
買手独占 is a monopsony (single buyer), whereas 双方独占 combines a single buyer and a single seller.
Compound of 双方 (both sides) and 独占 (monopoly), directly translating the English economics term 'bilateral monopoly'.