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Perfect competition is an uncommon phenomenon in the real business world. However, the actual market that approximate the conditions of perfectly competitive models include share markets, securities and bond markets and local vegetable market and agricultural product market etc.

Microeconomics is the study of the economic actions of individuals and small groups of individuals. Thus microeconomics may be defined as that branch of economic analysis that studies the economic behaviour of the individual unit a person, a household or a firm.

Anthropology is the study of humans, past and present. To understand the full sweep and complexity of cultures across all of human history, anthropology draws and builds upon knowledge from the social and biological sciences as well as the humanities and physical sciences. A central concern of anthropologists is the application of knowledge to the solution of human problems.

The name biological anthropology came into vogue when scientists started studying humans based on evidence that was not just limited to bones. For example the study of human genetics, the study of primates and their relationship to the environment, etc.

Socio-cultural anthropologists are concerned with human social and cultural diversity and the bases of these distinctions, be they economic, political, environmental, biological; social roles, relationships, and social transformation; cultural identity; cultural dimensions of domination and resistance; and strategies for representing and analyzing cultural knowledge.