1\begin{table}[htbp]\centering\footnotesize2\caption{Model B: channel decomposition (changes relative to the no-AI economy)}\label{tab:b_decomp}3\begin{tabular}{lrrrrr}\toprule4Channel (scenario) & $\Delta Y$ (\%) & $\Delta$ labour share & $\Delta$ Gini & $\Delta$ top 10\% & $\Delta r$ (pp)\\\midrule5AI as production input & 97.6 & -0.225 & -0.098 & -0.078 & -1.86\\6Delegation only & 3.1 & +0.000 & +0.018 & +0.009 & -0.59\\7Both, broad ownership & 107.9 & -0.227 & -0.108 & -0.096 & -2.53\\8Both, concentrated (top 10\%) & 73.6 & -0.217 & -0.022 & +0.017 & -0.05\\9Scarce compute, broad & 36.7 & -0.103 & -0.049 & -0.050 & -1.98\\10Scarce compute, concentrated & 24.7 & -0.103 & -0.026 & -0.053 & -0.36\\11Both, broad, no borrowing & 108.1 & -0.227 & -0.121 & -0.099 & -2.54\\12Both, broad, cheap fee & 109.7 & -0.228 & -0.120 & -0.099 & -2.63\\13Both, broad, no human mistakes & 111.0 & -0.229 & -0.123 & -0.102 & -2.66\\14\bottomrule\end{tabular}\end{table}15