Other blood tests which may be done include: 1  Blood clotting tests. The liver makes many of the proteins needed to make blood clot. 2  Gamma-glutamyltransferase (GGT, or 'gamma GT'). This is another enzyme that occurs in liver cells. 3  Immunology. Blood tests may be done to detect: Viruses and antibodies to viruses.
Definition [edit]. In the study of economics and market competition, collusion takes place within an industry when rival companies cooperate for their mutual benefit. Collusion most often takes place within the market structure of oligopoly, where the decision of a few firms to collude can significantly impact the market as a whole. Cartels are a special case of explicit collusion.
In contrast macroeconomics involves the sum total of economic activity, dealing with the issues such as growth, inflation, and unemployment. Macroeconomics is the study of economies on the national, regional or global scale. This key difference alters how the two approach economic situations. Microeconomics does consider how macroeconomic forces impact the world, but it focuses on how those forces impact individual firms and industries.