positive statement
can be tested and validated; it describes "what is"
normative statement
an opinion that cannot be tested or validated; it describes "what ought to be"
ceteris paribus
means "other things being equal" or "all else equal" and is used to build economic models. It allows economists to examine a change in one variable while holding everything else constant
production possibilities frontier
a model that illustrates the combinations of outputs that a society can produce if all of its resources are being used efficiently
law of increasing opportunity cost
states that the opportunity cost of a good rises as more of the good is produced
specialization
the limiting of one's work to a particular area
absolute advantage
refers to the ability of one producer to make more than another producer with the same quantity of resources
consumer goods
goods produced for present consumption
capital goods
help produce other valuable goods and services in the future
investment
the process of using resources to create or buy new capital