Final answer:
The statement is a positive economic statement as it describes a potential outcome of a fall in incomes on the demand for own-label supermarket foods, which are considered inferior goods. It is based on observable behavior, rather than subjective judgements.
Step-by-step explanation:
The statement "A fall in incomes will lead to a rise in demand for own-label supermarket foods" is a positive economic statement because it describes what the effects of a fall in incomes could potentially be without expressing a judgement or prescribing a course of action. In economics, a positive statement is concerned with the description and explanation of economic behavior, and it can be tested and validated through observation.
The relationship between income levels and demand for certain types of goods, such as own-label supermarket foods which are considered inferior goods, is an example. When people's incomes fall, they may opt for less expensive alternatives, leading to an increase in demand for these products. This contrasts a normative statement, which is based on subjective judgments or opinions on what ought to be and cannot be proven or disproven.