# Finding the optimal consumption bundle given the strictly concave utility function $v(x,y) = U(x) +y$?

I am also finding it difficult to understand what are the fundamental differences between analysing optimal bundles between concave and convex functions ?

Does it also happen that the optimal bundle in strictly concave function is $$not$$ a boundary condition ? Thanks.

• Why do you include a quasi-linear form of utility function in the title? Is quasi-linearity supposed to have any significance in your question? By "boundary condition" did you mean "corner solution"? – Herr K. Jun 4 '19 at 20:29
• When you ask about the optimal bundle as a function, you probably mean as a function of parameters, but which parameters are you considering? – Regio Jun 5 '19 at 20:10