The development of an information society leads to a shift from material civilization towards an invisible civilization which should properly be called an information civilization. The information civilization creates enormous opportunities for society and economy. Internet-based functions, such...

We examine a strategic-choice handicap model in which males send costly signals to advertise their quality to females. Females are concerned with the net viability of the male with whom they mate, where net viability is a function of the male's quality and signal. We identify circumstances in...