Most models use the __________ __________ assumption that all other things are held constant, or equal. __________ economics emphasizes psychological constraints and complexities that potentially...

Most models use the __________ __________ assumption that all other things are held constant, or equal. __________ economics emphasizes psychological constraints and complexities that potentially interfere with rational decision making. This approach utilizes the __________ __________ hypothesis that people are not quite rational, because they cannot study every possible alternative but instead use simple rules of thumb to decide among choices. __________ economics is value-free and relates to statements that can be refuted, such as “If a, then b.” __________ economics involves people’s values and typically uses the word should.