H. Gregg Lewis did fundamental research outlining the economic effects of trade unions and considering how to measure them carefully. He also laid out the theory of the supply and demand for labor in careful detail that has underlain economists' thinking about these outcomes. Aside from...

Research on the process of training evaluation has progressed in many independent fields. In our study, we combine the unique views on training, and training evaluation from the fields of psychology, education, economics, and econometrics. Psychology and education provide knowledge on how to...