With the decline in growth rates globally, economies are on the lookout for alternative growth drivers to support their development. While they have identified infrastructure investment as a means to boost aggregate demand, there are still signs of under-investment. This policy brief aims to help economies better understand the relationship between capital investment and growth. It complements existing literature by examining the relationship between different types of capital and growth using a global dataset. It also provides some key takeaways for the APEC region.