I am trying to understand a paper written back in 1989 about long run population growth. It seems like the PDF is a scanned image of the paper.
The notation for the function is on page 11 of the pdf (here):
$$ Q_t = A_t*(K_t^\alpha N^t_\beta T_t^\rho) $$
$$ Q_t = A_t*(K_t^\alpha N^\beta_t T_t^\rho) $$
Im not sure its a typo or not because it shows up the same way later in the paper on page 14.
*Edit: I also have no idea what $\hat c$ is in the paper:
I don't see where it is defined. Only where consumption is compared to it.