Examlex
Most DBMS products will let you define a primary key on a column that contains null values.
Purely Competitive Market
A market structure characterized by many buyers and sellers, where no single entity has enough power to influence the market price of goods or services.
MP
Marginal Product, which refers to the additional output resulting from using one more unit of a productive input, holding all other inputs constant.
Wage Rate
The fixed amount of compensation paid to an employee by an employer in return for work performed, often expressed per hour, day, or piece.
Marginal Resource Cost
The additional cost incurred by producing one more unit of a resource or good.
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