y=cobb(k)

% Cobb-Douglas production function
% Y=F(K,N)=K^{alpha}*N^{1-alpha}
% In per capita form y=k^{alpha}

function y=cobb(k)
global alpha
if alpha>0 & alpha<1
   y=k.^alpha;
else
   y=-inf*abs(k);
   disp('invalid capital share')
end