The three volumes cover the essential themes of macroeconomics included in an undergraduate program of study. Each volume deals with one year of study or a single modular unit. The volumes build on each other thematically, but are designed to be used independently, so each volume can be read...

Empirical studies analyzing the determinants of U.S. presidential popularity have delivered quite inconclusive results concerning the role of economic variables by assuming linear relationships. We employ penalized spline smoothing in the context of semi-parametric additive mixed models and...