We have lived through two practical attempts to realise these in their pure form: the centrally state-planned economies of the Soviet type and the totally unrestricted and uncontrolled free-market capitalist economy.
He advocated a centrally organized state, stating that the unification of South Slavs was a historical and political inevitability and that Serbs, Croats and Slovenes shared "blood kinship and feeling of common fate".
To the modern reader, the contrast between the scale of the enterprise — the Pizarros toppled what was then one of the world's biggest centrally organized states — and its gangsterish, squabbling leaders is staggering.
The commission, a powerful Beijing organization with oversight of some of the biggest centrally controlled state companies, sent a letter to the study's authors arguing that reducing state involvement in the economy would be "unconstitutional" and effectively "subvert the basic economic system of socialism".
Will Afghanistan be a centrally run state with the seat of power in Kabul?
Unlike the Liberal and Labor parties, whose election campaigns are run centrally, each state and territory Greens organisation is responsible for its own campaign.
MIT.nano will more than double the Institute's shared space for nanoscale research, making centrally located, state-of-the art equipment easily accessible to everyone who needs it.
The United States has assisted Russian efforts to replace its centrally planned, state-controlled economy with a market economy and helped create institutions and infrastructure for a market economy.
It became a centrally administered state in 1952, but in 1956 its status was changed to that of a union territory under the central government.
But the number of centrally owned state enterprises would continue to decline from 161 at the end of last year to between 80 and 100 in 2010.
