It can be hard to measure the effects of infrastructure investment on an economy. Knowing whether an investment worked means somehow identifying the revenue it generated amidst the noise of an economy in full swing.An Asian Development Bank Institute study used tax revenue as a measure of growth, and found significant contributions generated by the construction and operation of the line and the eventual connection of Japan’s southern-most island to the larger network of high-speed trains known as shinkansen, linking Kyushu with Osaka and Hiroshima on Japan’s largest island of Honshu.Read the transcripthttp://bit.ly/2BiskIzRead the working paperhttps://www.adb.org/publications/impact-infrastructure-investment-tax-estimating-spillover-effects-kyushu-high-speedAbout the authorsNaoyuki Yoshino is the dean of the Asian Development Bank Institute (ADBI)https://www.adb.org/adbi/about/deanUmid Abidhadjaev is a project consultant on infrastructure at ADBIKnow more about ADBI’s work on spillover effectshttp://bit.ly/2hGyAlm