Long Run in Economics

Consider a simple economic model designed to explain a firm's daily hiring decisions. The model assumes the firm knows the market price for its product and the specific production technology it has available (e.g., its factory and machinery). The goal of the model is to determine the number of workers the firm should employ to maximize its profit. In the context of this specific model, which of the following is an endogenous variable?

A variable, such as the market price of a good, is inherently an outcome to be explained by an economic model and will be treated as such in every model that includes it.

Identifying the Outcome of an Economic Model

Analyzing a Market Model's Purpose

Variable Classification in Economic Models

Consider a standard economic model designed to explain the market for new cars. The model's purpose is to determine the equilibrium price and the total quantity of cars sold annually. The model assumes that factors like the average price of steel (a key input for making cars) and the average household income are external factors that influence the market but are not explained by it. Based on this model's purpose, match each variable below to its correct classification.

An economist creates a model to determine the optimal number of pizzas a shop should produce each day to maximize profit. In this initial 'short-run' model, the number of pizza ovens is considered a fixed input that cannot be changed. If the economist then expands the model to a 'long-run' perspective, where the shop owner can now decide whether to buy more ovens or sell existing ones, how does the classification of the 'number of pizza ovens' variable change within the model's framework?

Evaluating Model Design in Housing Market Analysis

In an economic model, the variable that the model seeks to explain or determine as its primary result is known as the ________ variable.

Evaluating Model Design for Agricultural Forecasting