what are the different types of economic theories?
['Supply and Demand (Invisible Hand)', 'Classical Economics.', 'Keynesian Economics.', 'Neoclassical Synthesis (Keynesian for near-term macro; Classical for micro and long-term macro)', 'Neo-Malthusian (Resource Scarcity)', 'Marxism.', 'Laissez Faire Capitalism.', 'Market Socialism.']