Terms: Virtual Economy (1,110,000), virtual economic (52,300), fictitious economy (12,900), true economy (85,800),
Terms: financial sector (22,900,000), financial markets (83,600,000), financial engineering (4,300,000), financial (3,610,000,000),
Boolean: marx (105,000,000), "karl marx" (22,100,000), marx +economy (11,600,000), marx +economic (13,800,000), marx +economy +virtual (1,240,000), marx +economy +fictitious (202,000),