Complex-Valued Modeling in Economics and Finance outlines the theory, methodology, and techniques behind modeling economic processes using complex variables theory. The theory of complex variables functions is widely used in many scientific fields, since work with complex variables can...

Advantages and disadvantages of existing coefficient of determination and mean absolute percentage error are examined, and two new coefficients (the compliance coefficient and the balance coefficient) giving new information about the approximation properties of econometrics models, are proposed.