According to Perloff (2014), Table 3.2, when the number of firms increases in a Cournot market structure:

Reference: Perloff, J. (2014). Microeconomics. 6^th Edition. Chapter 13: Oligopolistic and Monopolistic Competition. Pearson. (An electronic copy of this book chapter is available in the unit Reading List, which can be found on the right panel of the unit Blackboard site).

	a.	The price approaches the marginal cost, and hence the deadweight loss should approach zero.
	b.	The price decreases and the market output increases, and it is not possible to tell whether the market deadweight loss increases or decreases.
	c.	The firm output level decreases approaching the monopoly level, and hence the deadweight loss should approach the monopoly level.
	d.	The price decreases and the market output level decreases, and hence the deadweight loss should approach zero