This document provides a review of the literature on R&D Spillovers and includes unit root test results, the additional results of static and dynamic models, plots of all series, Stata routines, and tables of the data collection on Gross Expenditure on R&D (GERD) as a percentage of GDP, as found in the study by Ruge-Leiva (2015) International R&D Spillovers and other Unobserved Common Spillovers and Shocks.”