So we have one independent variable – receiving the voucher or not – and a bunch of possible dependent variables, like earnings, education, and health outcomes.
To begin with, it may be useful to make clear which elements in the economic system we usually take as given, which are the independent variables of our system and which are the dependent variables.
In regression, y is the variable we want to predict (the dependent variable). In this example, y is the shear strength. x is the independent variable — in this case, the age of the propellant.
在回归中,y 是我们想要预测量(量)。在此示例中,y 是剪切强度。 x 是自量——在本例中是推进剂年龄。