<Li> Socialist mode of production </Li> <Li> To each according to his contribution </Li> <Li> Workers' self - management </Li> <Tr> <Td> Models (show) <Ul> <Li> Decentralized planning Participatory economics </Li> <Li> Market socialism <Ul> <Li> Economic democracy </Li> </Ul> <Ul> <Li> Lange model </Li> <Li> Mutualism </Li> <Li> Ricardian socialism </Li> </Ul> </Li> <Li> Planned economy Soviet - type Project Cybersyn </Li> <Li> Socialist market economy Socialist - oriented market </Li> </Ul> </Td> </Tr>

What role have third parties played at various times in the american political process