This book surveys existing similar econometric models in Japan and offers several econometric models combining Japan, the US and other Asia-Pacific countries. These models have been explored by the author and his group at Nagoya University and other institutions for three decades, and are applied for the following four objectives. First, they construct a world econometric model of industry and trade, and thereby quantitatively assess the impacts of protective US trade policies and Japan's technical progress on Asia-Pacific economies. Second, they use an international input-output table, including China, to analyze the interdependence between Japanese firms with the subsidiaries in the US and Asia, and other foreign companies. Third, they use a small link model of China, Japan, Korea and the US, and thereby evaluate the macroeconomic effects of the respective fiscal policies. Fourth, they offer a multi-sector econometric model of the interactions pertaining to economic activity, energy and environment in China, and assess the effects of improved energy efficiency and demand shift in China.This volume comprises papers written by Soshichi Kinoshita (Professor Emeritus, Nagoya University, Nagoya), Jiro Nemoto (Professor of Economics, Nagoya University, Nagoya), Mitsuo Yamada (Professor of Economics, Chukyo University, Nagoya) and Taiyo Ozaki (Professor of Economics, Kyoto Gakuen University, Kyoto).