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Selection bias is a problem when trying to estimate the return to education in a standard human capital model. In this context, what does selection bias refer to?
Penicillin
A group of antibiotics derived from Penicillium fungi, first discovered by Alexander Fleming in 1928, used to treat bacterial infections.
Severe Combined Immunodeficiency Syndrome
A rare genetic disorder that results in an extremely weak immune system, making the body highly susceptible to infections.
Humoral Immunity
An aspect of the immune system mediated by molecules in the blood or mucosal secretions, including antibodies produced by B cells, that fights against pathogens.
Cellular Immunity
A part of the immune response that involves the activation of immune cells to defend the body against pathogens, distinct from antibody-mediated immunity.
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