Habits and Rules of Thumb as a Mechanism for 'As If' Behavior
The 'as if' principle works because people do not need to consciously perform complex economic calculations. Instead, through a process of trial and error—sometimes unintentional—individuals develop habits and rules of thumb. These learned behaviors guide them toward choices that are satisfactory and free of regret, leading to outcomes that align with what formal economic models would predict.
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CORE Econ
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Introduction to Microeconomics Course
The Economy 2.0 Microeconomics @ CORE Econ
Ch.3 Doing the best you can: Scarcity, wellbeing, and working hours - The Economy 2.0 Microeconomics @ CORE Econ
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A small coffee shop owner does not use any formal economic formulas to set the price of a latte. Instead, she observes daily sales. If she notices that many customers hesitate at the current price and sales are slow, she lowers it slightly. If the shop is constantly overwhelmed with orders and running out of milk, she raises the price a bit. Over several months, her pricing stabilizes at a point where she has a steady stream of customers and maximizes her daily profit. How does this owner's behavior relate to the argument that economic models can be useful even if their assumptions about decision-making are not literally true?
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According to the 'as if' principle for evaluating economic models, a model that assumes individuals make choices by performing complex mathematical optimizations is only considered useful if empirical evidence confirms that individuals consciously perform these specific calculations.
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An economist creates a model assuming that when grocery shopping, people subconsciously solve a complex set of equations to perfectly optimize their cart's nutritional value per dollar spent. To test this model's usefulness, a study is conducted. According to the 'as if' principle for evaluating economic models, which of the following findings would best support the economist's model?
An economic model is considered useful if people's actions lead to outcomes as if they were consciously making the complex calculations described by the model, even if they are not. This reasoning works best when people can learn from experience and adjust their behavior. In which of the following situations is this 'as if' reasoning least likely to provide a useful explanation for behavior?
An economic theory's value is judged by its ability to predict outcomes, not by the literal realism of its assumptions about the decision-making process. People's actions often align with the predictions of complex models as if they had performed the calculations, typically because they learn, adapt, or are otherwise guided toward optimal outcomes. Match each of the following scenarios to the description of the underlying mechanism that makes it a good example of this 'as if' principle.
A person starts a new job and must determine the quickest driving route to the office. According to the principle that behavior can align with optimal outcomes through a process of learning and adaptation, arrange the following events in the most logical chronological order.
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Learn After
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A person consistently buys the same brand of coffee each week without comparing prices or quality of other brands. They originally tried several brands and settled on this one because it offered a good balance of taste and price. How does this behavior illustrate the economic principle that learned habits can lead to outcomes that align with formal economic predictions?
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The idea that people use habits and rules of thumb suggests that economic models are only accurate if individuals are consciously aware of the formal economic principles their behavior mimics.
Match each common 'rule of thumb' with the formal economic calculation it approximates, illustrating how learned behaviors can lead to outcomes that appear 'as if' they were derived from complex analysis.
A person tries a new rideshare app and has a very negative first experience with a late driver and a billing error. Despite the company offering a credit and promising improvements, the person deletes the app and continues using their old, familiar rideshare service. Which statement best analyzes this behavior from the perspective that habits and rules of thumb can produce outcomes consistent with formal economic models?
A student is trying to find the most efficient way to commute to campus. According to the principle that learned habits can produce outcomes consistent with formal optimization, arrange the following stages in the likely order they would occur.
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