In this paper, we analyze and compare general development and individual behavior on two non-profit internet-based hospitality exchange services – bewelcome.org and warmshowers.org. We measure the effort needed to achieve a reallife interaction, whereby the advantages of mutual altruism arise. The effort needed is the communication quantified in units of time. Since the amount of effort is not ...

Generation and exploitation of knowledge became one of the most significant components in the new economy. This paper first investigates influence of information and communications technology on economy, with specific emphasis on Internet economy and electronic commerce. The paper then describes characteristics of the knowledge economy, discusses knowledge, presents main issues relevant for bui...