My question comes from these sentences,
Research has also found that the impact of ICT capital is greater in an organization when there are higher levels of investment in intangible capital. This includes R&D, firm-specific human capital, and organizational structures.
The Cambridge Dictionary definition of "capital"
money and possessions, especially a large amount of money used for producing more wealth or for starting a new business:
and the definition of "asset"
something valuable belonging to a person or organization that can be used for the payment of debts: A company's assets can consist of cash, investments, specialist knowledge, or copyright material.
Definition of "asset" in Macmillan Dictionary
something such as money or property that a person or company owns
Definition of "investment" in Cambridge Dictionary
the act of putting money or effort into something to make a profit or achieve a result
Reading all these makes me feel investment is money you put into a company or project; asset is something of value that's in there already. But capital seems to mean both? And in my sample sentences, they are almost interchangeable (except for human capital, this one I have no doubt about)?