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positive statement
In economics and philosophy, a positive statement concerns what "is", "was", or "will be", and contains no indication of approval or disapproval (what should be). Positive statement is based on empirical evidence. For examples, "An increase in taxation will result in less consumption" and "A fall in supply of petrol will lead to an increase in its price". However, positive statement can be factually incorrect: "The moon is made of green cheese" is empirically false, but is still a positive statement, as it is a statement about what is, not what should be.
== Positive statements and normative statements ==
We should know how to make a distinction between positive and normative statement. Positive statement is based on empirical evidence, it can be tested and no value judgements are involved. It's mainly talk about what is and that contains no indication of approval or disapproval. When values or opinions come into the analysis, then this is the realm of normative economics. A normative statement expresses a subjective judgment about whether a situation is desirable or undesirable, which can carry value judgements. It's mainly tallk about what ought to be. While this distinction seems simple, it is not always easy to differentiate between the positive and the normative. Many widely-accepted statements that people hold as fact are actually value based.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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