Geometry of quasi-sum production functions with constant elasticity of substitution property

Bang-Yen Chen

A production function $f$ is called quasi-sum if there are strict monotone functions $F,h_1,...,h_n$ with $F^{\prime }>0$ such that $$f(x)=F(h_1(x_1)+...+h_n(x_n)).$$ The justification…