Figure 18-A 
-Refer to Figure 18-A.The change in total surplus from free trade is area:
Definitions:
Independent Variables
Variables in an experiment that are manipulated by the researcher to test their effect on dependent variables.
Correlation Coefficient
A statistical measure that indicates the extent to which two variables fluctuate together.
Correlation Coefficient
A statistical index measuring the strength and direction of a linear relationship between two variables.
Abortion Laws
Regulations and legal principles that govern the availability and conditions under which abortion can be performed.
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