The Basics
- Simple definition: Mathematical tools for organizing and manipulating multiple numbers simultaneously.
- Core idea: Working with lists (vectors) and tables (matrices) of data.
- Think of it as: Spreadsheets for mathematicians.
What It Actually Means
Vectors are ordered lists of numbers (like a row in Excel). Matrices are rectangular arrays (like multiple rows and columns). They’re essential for handling multiple variables, equations, and observations simultaneously. In economics, they appear in input-output analysis (tracking flows between sectors), econometrics (handling multiple regressors), general equilibrium (multiple markets), and portfolio theory (multiple assets).
Example
Pakistan’s input-output table is a matrix showing how much the textile sector buys from agriculture, energy, transport, etc. Multiplying matrices reveals the economy-wide effects of changes in one sector.
Why It Matters
Modern economics deals with multiple variables simultaneously. Vectors and matrices provide the language and tools for this complexity, especially in econometrics and computational economics.
See also
Linear Algebra • Input-Output Analysis • Econometrics • General Equilibrium • Matrix Algebra
Read more about this with MASEconomics:
Vectors and Matrices in Economics: Essential Tools for Data-Driven Analysis