Help within genetically related and unrelated organisms as well as investments of investors holding shares to different degree including charity can be understood within the ensemble concept. In an ensemble transfer of substrate from a source to a sink may result in superadditivity as well as...

Kin selection theorists argue that evolution in social contexts will lead organisms to behave as if maximizing their inclusive, as opposed to personal, fitness. The inclusive fitness concept allows biologists to treat organisms as akin to rational agents seeking to maximize a utility function....

Kin selection theorists argue that evolution in social contexts will lead organisms to behave as if maximizing their inclusive, as opposed to personal, fitness. The inclusive fitness concept allows biologists to treat organisms as akin to rational agents seeking to maximize a utility function....

We investigate the balance between work (including home production), leisure and personal care (chiefly sleep) within South African households. We use the South African time use survey which enables us to obtain a better measure of the division of total labour (paid and unpaid) within South...