To Get Increasing Returns to Scale Using the Production Function $Y _ { t } = A _ { t } K _ { t } ^ { 1 / 3 } L _ { t } ^ { 2 / 3 }$

Multiple Choice

To get increasing returns to scale using the production function $Y _ { t } = A _ { t } K _ { t } ^ { 1 / 3 } L _ { t } ^ { 2 / 3 }$ , we need to replace total factor productivity with:

A) more capital
B) the flow of ideas, A_t
C) the stock of ideas, A_t
D) the number 2
E) twice the factor productivity, $2 \times \bar { A }$