In this brief section, the last one of the chapter, Hicks summarizes by saying that he doubts much more can be said about the theory of exchange, at least at a similar level of generality. He states that it would be possible to proceed to dealing with applications -- especially given how much of the traditional theory of international trade was developed by studying the simple exchange of two goods -- but he is choosing not to proceed in that direction in this book.
He notes, however, that having spent so much time on the theory of exchange will prove useful in the upcoming chapters. With production and with dynamic problems, "almost exactly the same questions" as those examined in this chapter will appear. Although these questions will seem slightly more complicated at first, Hicks claims they can be cast in familiar forms, "and so it will turn out that we know the answers already."
This completes the discussion of the first five chapters; thank you for reading this far.
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