Bird song is usually regarded as an attribute of males. However, in some species, females may also produce songs even with comparable complexity to that of males. It has been suggested that female song may evolve due to similar selection pressures acting on males, but no study has yet...

Despite the well-documented increase in the relative wages and expenditures of highly-educated individuals in the U.S. in recent decades, leisure inequality mirrors inequality of wages, i.e. we observe that highly-educated individuals have now relatively less leisure time than lower-educated...

This paper is an argument about gender relations. It takes the entwined themes of men`s interests in parenthood, the sex division of labour and its evolution, policy for gender equity and policy to support the level of social reproduction. The emphasis on women`s employment as a determinant of...

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...

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...