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This article reports on an experiment that tests whether a particular representation of robotic control processes is adequate for capturing significant variations in robot behavior. These variations can then be explored by a selectionist mechanism that generates and tests variations. An ecosystem modeled after a physical robotic ecosystem is introduced. The ecosystem contains a robot that occasionally has to recharge, as well as competitors that take away energy from the total system. The robot has to discover that its viability requires combating the competitors. ; This research has been carried out while visiting the Sony Computer Science Laboratory in Tokyo. The agents group is nanced by the Belgian Federal government FKFO pro ject on emergent functionality (NFWO contract nr G.001 4.95) and the IUAP pro ject (nr. 20) CONSTRUCT. ; Peer Reviewed

I develop a model of bilateral conversations in which players honestly exchange ideas with their competitors. The key to incentive compatibility is complementarity in the information structure: a player can generate a new insight only if he has access to his counterpart's previous thoughts on a topic. I then examine a social network in which A has a conversation with B, then B has a conversation with C, and so on. Relatively underdeveloped ideas can travel long distances over the network. More valuable ideas, by contrast, tend to remain localized among small groups of agents. (JEL D83)

VARIOUS GROUP-IDENTITIES TOWARD WHICH A PERSON IS APT TO EXPPERIENCE A SENSE OF LOYALTY DO NOT EXERT EQUAL INFLUENCE AND MUCH THEREFORE BE ANALYTICALLY PERCEIVED AS FORMING A HIERARCHY IN TERMS OF RELATIVE SIGNIFICANCE. HISTORY TEACHES THAT THE ORDERING OF THIS HIERARCHY IS NOT PERMANENT AND THUS THE NATION. WHILE CURRENTLY "THE SUPREME LOYALTY." IS NOT APT TO RETAIN ITS PREEMINENCE INDEFINITELY. THE FIRST POINT APPEARS INCONTROVERTIBLE AND, SELF-EVIDENT. IT HAS, HOWEVER, BEEN FAR FROM SELFEVIDENT TO MANY AUTHORS. WHO HAVE WARNED AGAINST THOSE WHO EXAGGERATE THE SIGNIFICANCE OF NATIONALISM BY NOTING THAT THE NATION IS BUT ONE OF SEVERAL GROUP-IDENTITIES IN WHICH THE AVERAGE INDIVIDUAL SHARES.