The Investment Gap Tool is an Excel tool that calculates historical investments and future investment needs in electricity generation capacity on a country basis. The estimation of investment costs & needs in different power generating technologies is done by looking at its main constituents: a technology’s overnight cost and its corresponding installed capacity. The current version of the Investment Gap Tool calculates historical investments and future investment needs for Canada, France, Germany, Italy, Japan, the United States and the United Kingdom (G7), China and India.