Abstract
This paper studies the condition that a software producer should determine whether to exercise the copy free strategy or not by building up a model.
In the model, we assume that the software is constructed by basic function and additional function, and that the evaluation values are independent distribution for consumers. Meanwhile, the model also assumes that the consumer will bear the risk to pay a fine when copying and using the software which is not copy-free. It also assumes that the evaluation values of risk are different depending upon the consumer. By analyzing the profit between the strategy of copy-free and not copy-free, we find it advantageous for copy-free strategy depending on the relative size of the evaluation values of the basic function and additional function.
