Supply, Demand and Equilibrium

Effects of Changes in Non-Price Factors - Demand

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Carys Brown


Non-Price Factors

There are four main non-price factors that may impact demand. Changes in these non-price factors cause a shift in the entire demand curve to the left or to the right. An increase in demand will shift the curve to the right and a decrease in demand will shift the curve to the left. 

When constructing diagrams, use the checklist below to ensure that you include all the necessary components of an economic model. Furthermore, when decribing your models in exams, you must outline the following: 

  1. If demand is increasing or decreasing.

  2. The non-price fcator that has caused this change.

  3. The direction that the curve will shift. (left or right)

Example 1
Topic Menu
The Law of Supply
Non-Price Factors of Supply
The Effects of Changes of Non-Price Factors - Supply
The Law of Demand
Non-Price Factors of Demand
Effects of Changes in Non-Price Factors - Demand
Market Equilibrium
The Concept of Surplus' and Shortages
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Example One Explanation

The factor that influenced the change in demand can be identified as the ‘price for substitutes’ as well as consumers ‘tastes and preferences.’ The differing price and qualities of coffee forced buyers’ demand for ‘Brand One Coffee’ to decrease, therefore, shifting the demand curve to the left.


This question is difficult as the prices mentioned may trick students into thinking that the price is the factor that shifts demand. However, this is not the case as it compares the prices of two brands as opposed to a change in price within the one company. Also, it is important to direct your exam answers to the company that the question asks for. This question asked for students to show the decreasing demand for ‘Brand One’s Coffee,’ however, it could have asked students to demonstrate the effect on demand for ‘Better Brand Coffee;’ changing the model and answer entirely. In short, it is important to read the question carefully!

Example 2
Explanation and Exam Tips

Example Two Explanation

The non-price factor used in this question can be identified as ‘population size.’ Due to an increase in the number of consumers, there will an increase in demand for goods and services across the state as there is more buyers with more needs and wants, this will shift the dmand curve to the right


In some exams, you will need to identity whether there will be a change in supply or demand or both. A simple way of doing this is by looking at the language used in the question; generally if it mentions buyers, the shift will be on the demand side and if the question states sellers, the shift will be on the supply side.