Pareto Improvement

A situation where it is possible to make one party better off without negatively affecting another party

What is a Pareto Improvement?

A Pareto improvement is a theory in neoclassical economics. It occurs in a situation where it is possible to make one party better off without negatively affecting another party, given the original allocation of goods. Pareto improvements can keep occurring until the Pareto optimum is reached, at which time no more improvements can be made without negatively affecting another party.


Pareto Improvement


Pareto Efficiency/Optimum

It is essential to understand the Pareto efficiency, otherwise known as the Pareto optimum, to fully comprehend what a Pareto improvement is and how it can be used.

Pareto efficiency occurs when no change in the allocation of resources can make one party better off without making another party worse off.

Pareto Inefficiency happens when resources are not optimally allocated. Therefore, a reallocation of resources can make one party better off without making another party worse off.

In theory, it would be hard to find situations that are not Pareto efficient, given that humans and businesses are highly incentivized to create as much value for themselves as possible. Thus, it can sometimes be quite hard to find areas where Pareto improvements can be made.


Pareto Efficiency/Optimum


Understanding a Pareto Improvement

Vilfredo Pareto was an Italian economist at the end of the 19th century and early 20th century and was a very influential figure in modern economics. Also known for founding the Pareto principle, a Pareto improvement is a condition in which the reallocation of resources can make one person or party better off without making another individual or party worse off. The improvements, in theory, should continue until the Pareto optimum is reached. At such a point, no more reallocations can make someone better off without harming the other person.

Pareto improvements are found in many different fields of work. Business, manufacturing, engineering, academia, and beyond. It is a result of the trade-offs associated with all kinds of work. Each field seeks to optimize its outputs with its given inputs, and Pareto improvements can help achieve the desired result(s).

For example, in large-scale production, Pareto improvement trials can be run to see if there are any areas in which production efficiency can be improved. The factory manager would reallocate resources (machinery, human capital, supplies) to different areas of the production lines and evaluate any changes in production outputs. If there were any positive changes, without any adverse effects, the manager would keep the change. Any Pareto improvements that are not made would be leaving out potential profits for the business.


Benefits of Pareto Improvements

Ultimately, the goal of Pareto improvements is to reach the Pareto optimum, where everyone is either happy or satisfied with the goods that they’ve received. The Pareto optimum helps keep the market balanced and prevents market failure. Any market failure would mean an inefficient allocation of resources and Pareto inefficiency.


Limitations of Pareto Improvements

As with all economic theories, Pareto improvements have their limitations. Even though an outcome has a Pareto improvement or is Pareto efficient, it does not mean it is fair or equitable. A society with Pareto improvements can still have inequality within it.

For example, if three people have three pizza slices to split, the Pareto optimum would be to give one piece to each person. However, imagine there were only two slices to split among three people (assuming you can’t share a slice). The Pareto optimum would have two of the people getting a slice of pizza and the third not having any. Because the third person never has any, to begin with, they are not losing out.

When making Pareto improvements, it is important to consider more factors than the purely monetary or personal utility. Many factors play into the equality of a society and successful business practices that can be overlooked with such improvements.


Pareto Efficiency Graph

Below is a Production-Possibilities Frontier. Pareto improvements can be applied to the graph and are a great visual representation. Any points on the graph’s outer edge, such as C and D, are considered to be Pareto efficient. Any points within the curve, such as A and B, are considered to be Pareto inefficient.

Any movement from the inside of the curve towards the outside is a Pareto improvement. It is because the person or business is getting more output from the given amount of inputs. It can be seen by the grey arrow moving from point A to point E to Point D. Both legs are measurable Pareto improvements.


Pareto Efficiency Graph


Related Readings

CFI is the official provider of the Certified Banking & Credit Analyst (CBCA)® certification program, designed to transform anyone into a world-class financial analyst.

In order to help you become a world-class financial analyst and advance your career to your fullest potential, these additional resources will be very helpful:

  • Allocational Efficiency
  • Keynesian Economic Theory
  • Pareto Analysis
  • Physical Capital

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