Answer:
Gross private domestic investment less depreciation is net private domestic investment.
Step-by-step explanation:
Investment is addition to capital stock during a period of time. Depreciation is fall in value of fixed (capital) assets due to usage, wear & tear, obsolescence.
Gross Private Domestic Investment = Total addition to capital stock by private domestic sector, without accounting for depreciation of existing capital stock.
Net Private Domestic Investment = Addition to capital stock by private domestic sector, accounting for depreciation deduction of existing capital stock.
So, Gross Private Domestic Investment - Depreciation = Net Private Domestic Investment.