Manipulations and repeated games in future markets

This chapter analyzes the possibility of manipulation in futures markets, concentrating on the effects that manipulation may have on their informational efficiency . We use the concept of manipulation as it arises in the study of noncooperative games with imperfect information . The problem can be summarized as follows : disclosure that is, (less anonymity) may prevent manipulation and therefore improve the informational efficiency of the market . On the other hand, disclosure (less anonymity) may restrict entry, and therefore produce an efficiency loss. There is, in this sense, a tradeoff between informational efficiency and free entry.