Question

how can investment be made in humans

Answer 1

Human capital investment is the process companies use to develop employees. Businesses invest in employee training to improve business operations, which reduces wasted resources from unskilled workers and increases overall employee efficiency.
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Answer 2

In the field of economics the financial investment is a major component. The financial investment is not limited to the necessary resources , we can also invest on the humans in order to increase the quality of the human capital.

The investment on the human capital is necessary because,the most of the fields are operated by the humans and if we get a well trained group of humans as the employees ,then a massive success will be an obvious thing.