Positive economics is focused on analyzing cause and effect relationships to describe and explain economic phenomena, such as predicting that if the price of fish increases, demand will decrease. Normative economics examines the economy from an ethical perspective on what it should or ought to be, making value judgments about whether economic events are good or bad. An example of a normative statement is that those earning higher incomes should pay more in taxes than those with lower incomes. Normative economics involves subjective assessments rather than objective analysis.