Figure 1: Mankiw, Romer, Weil (1992)
Figure 2: Mankiw, Romer, Weil (1992)
Figure 3: Klenow, Rodriguez-Clare (1997)
Figure 4: Hsieh (1999)
Figure 5: Barro, Sala-i-Martin (2002), chapter 10
Figure 6: Jones (2010)