Table 1. Comparison of the experimental settings for the three experiments on lattices. A von Neumann's neighborhood consists of the four nearest neighbors in a square lattice, whereas a Moore's neighborhood comprises all eight surrounding neighbors in the same lattice.

	Plön			Madrid			Zaragoza
Size of the network	4 × 4			13 × 13			25 × 25
Neighborhood	von Neumann's			Moore's			von Neumann's
Number of rounds	25			47			52
Number of sessions	15			1			1
Payoff matrix		C	D		C	D		C	D
	C	3	0	C	7	0	C	7	0
	D	4	1	D	10	0	D	10	0
# of different players	240			169			625
# of actions	6000			7943			32500