Rational expectations refer to a theory in economics that assumes individuals make economic decisions based on all available information, including past experiences and expectations of future events. Synonyms for rational expectations include the efficient markets hypothesis, which assumes that financial markets are always efficient and prices always reflect all available information. The adaptive expectations theory assumes that individuals' expectations are formed based on past experiences and trends. The subjective expectations theory emphasizes individual beliefs and predictions about future events, based on personal values and experiences. Finally, the rational actors model assumes that individuals always act in their best self-interest, based on rational calculations. Overall, these different models offer alternative perspectives and approaches to understanding the complex nature of economic decision-making behavior.