Some dealerships in Brazil have been under investigation for price collusion, whereas models are sold at nearly exact sticker prices to keep profit margins high.

FORBES: Why Chryslers Are So Crazy Expensive In Brazil

Constantly providing subscribers with fancy new handsets and tacit price collusion among the three operators the same stodgy ones that had kept internet rates so high were to blame.

ECONOMIST: Face value

But institutional firms like Schonfeld depend heavily on the services of Wall Street and are unlikely to want to risk damaging those ties by flinging around accusations of price collusion.

FORBES: Naked Shorts

Yet none of the publishers seemed to think that they could act alone, and if they presented a unified demand to Amazon they risked being charged with price-fixing and collusion.

NEWYORKER: Publish or Perish

Not only will consumers pay more for foreign and domestically grown tomatoes at the grocery store and for salads and hamburgers at restaurants, but the new price-floor terms provide a strong indication that the specter of uncertainty associated with antidumping administration provides the necessary leverage to induce foreign producers into pricing schemes indistinguishable from collusion and price-fixing.

FORBES: Tomatoes, Furniture, and Shrimp: Is Extortion the Main Purpose of the Antidumping Law?

They may argue that the use of price-customisation software by sellers amounts to tacit collusion to overcharge particular groups of buyers.

ECONOMIST: Online prices

So shocking was the lack of interest in A-Rod's price tag that the players union even declared publicly it would look into the possibility of collusion (see SportsMoney blog: "Player's Union Way Off Base").

FORBES: Why A-Rod's Not Worth It