SPITE and GOT PEN? (lol)

Size of market

The total number of consumers or potential buyers in a given market.

Price of related goods

The price changes of substitutes or complements that can affect the demand for a good.

Income

Consumer income levels that can affect the demand for normal or inferior goods.

Tastes and preferences

Consumer likes and dislikes that influence their purchasing decisions.

Expectations

Consumers' beliefs about future conditions that can influence their current purchasing behavior.

Government action

Actions such as taxes and subsidies that can affect market behavior and prices.

Opportunity cost

The value of the next best alternative foregone when making a production decision.

Technology

The application of scientific knowledge for practical purposes that can influence production efficiency.

Prices/availability of inputs

The costs associated with production resources that can affect supply.

Expectations of future profit

Projections about profitability that can influence sellers' production decisions.

Number of sellers

The total count of businesses offering a product in the market, affecting competition and supply.